feat: add google drive dam foundation

.gitea/workflows/deploy-socialize.yml

@@ -0,0 +1,75 @@
+name: deploy-socialize
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  image:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install Docker CLI
+        run: apt-get update && apt-get install -y docker.io
+      - name: Login to Gitea container registry
+        env:
+          REGISTRY_USER: ${{ secrets.REGISTRY_USER }}
+          REGISTRY_PASSWORD: ${{ secrets.REGISTRY_PASSWORD }}
+        run: printf '%s' "$REGISTRY_PASSWORD" | docker login git.mapachotes.com -u "$REGISTRY_USER" --password-stdin
+      - name: Build images
+        run: |
+          docker build \
+            -t git.mapachotes.com/jbourdon/socialize-api:${{ gitea.sha }} \
+            -t git.mapachotes.com/jbourdon/socialize-api:latest \
+            -f backend/src/Socialize.Api/Dockerfile .
+          docker build \
+            --build-arg VITE_API_URL=/ \
+            -t git.mapachotes.com/jbourdon/socialize-web:${{ gitea.sha }} \
+            -t git.mapachotes.com/jbourdon/socialize-web:latest \
+            -f frontend/Dockerfile .
+      - name: Push images
+        run: |
+          docker push git.mapachotes.com/jbourdon/socialize-api:${{ gitea.sha }}
+          docker push git.mapachotes.com/jbourdon/socialize-api:latest
+          docker push git.mapachotes.com/jbourdon/socialize-web:${{ gitea.sha }}
+          docker push git.mapachotes.com/jbourdon/socialize-web:latest
+
+  deploy:
+    needs: image
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install SSH client
+        run: apt-get update && apt-get install -y openssh-client
+      - name: Deploy on sobina
+        env:
+          DEPLOY_HOST: ${{ secrets.DEPLOY_HOST }}
+          DEPLOY_USER: ${{ secrets.DEPLOY_USER }}
+          DEPLOY_SSH_PRIVATE_KEY_B64: ${{ secrets.DEPLOY_SSH_PRIVATE_KEY_B64 }}
+          SOCIALIZE_IMAGE_TAG: ${{ gitea.sha }}
+        run: |
+          : "${SOCIALIZE_IMAGE_TAG:?SOCIALIZE_IMAGE_TAG is required}"
+
+          mkdir -p ~/.ssh
+          printf '%s' "$DEPLOY_SSH_PRIVATE_KEY_B64" | base64 -d > ~/.ssh/deploy_key
+          chmod 600 ~/.ssh/deploy_key
+
+          write_env_value() {
+            key="$1"
+            value="$2"
+            escaped_value="$(printf '%s' "$value" | sed "s/'/'\\\\''/g")"
+            printf "%s='%s'\n" "$key" "$escaped_value"
+          }
+
+          deploy_env="$(mktemp)"
+          {
+            write_env_value SOCIALIZE_IMAGE_TAG "$SOCIALIZE_IMAGE_TAG"
+          } > "$deploy_env"
+
+          scp -i ~/.ssh/deploy_key -o StrictHostKeyChecking=accept-new "$deploy_env" "$DEPLOY_USER@$DEPLOY_HOST:/srv/prod/socialize/.deploy.env"
+          rm -f "$deploy_env"
+          scp -i ~/.ssh/deploy_key -o StrictHostKeyChecking=accept-new deploy/compose.yml "$DEPLOY_USER@$DEPLOY_HOST:/srv/prod/socialize/compose.yml"
+
+          ssh -i ~/.ssh/deploy_key -o StrictHostKeyChecking=accept-new "$DEPLOY_USER@$DEPLOY_HOST" \
+            'test -r /etc/socialize/socialize.env && cd /srv/prod/socialize && ./deploy.sh'

.github/workflows/backend-ci.yml

@@ -1,39 +0,0 @@
-name: Backend CI/CD
-
-on:
-  push:
-    branches: 
-      - main
-
-env:
-  AZURE_WEBAPP_NAME: hutopy-backend-api
-  DOTNET_VERSION: '10.0.x'
-
-jobs:
-  build_and_deploy:
-    runs-on: ubuntu-latest
-    environment: dev
-    steps:
-
-      # Checkout the repository
-      - uses: actions/checkout@v2
-
-      # Setup .NET Core
-      - name: Setup .NET Core
-        uses: actions/setup-dotnet@v1
-        with:
-          dotnet-version: ${{ env.DOTNET_VERSION }}
-
-      # Run dotnet publish
-      - name: dotnet build and publish
-        run: |
-          cd backend
-          dotnet publish --configuration Release --artifacts-path ./publish/ Socialize.slnx
-
-      # Deploy to Azure WebApp
-      - name: Deploy to Azure WebApp
-        uses: azure/webapps-deploy@v2
-        with:
-          app-name: ${{ env.AZURE_WEBAPP_NAME }} 
-          publish-profile: ${{ secrets.AZURE_WEBAPP_PUBLISH_PROFILE }}
-          package: './backend/publish/publish/Socialize.Api/release/'

.github/workflows/frontend-ci.yml

@@ -1,38 +0,0 @@
-name: Frontend CI/CD
-
-on:
-  push:
-    branches:
-      - main 
-
-env:
-  AZURE_SWA_NAME: hutopy-portal
-
-jobs:
-  build_and_deploy:
-    runs-on: ubuntu-latest
-    steps:
-      
-      # Checkout the repository
-      - uses: actions/checkout@v2
-     
-      # Npm install
-      - name: npm install
-        run: |
-          cd frontend
-          npm install
-      
-      # Npm run build
-      - name: npm run build
-        run: |
-          cd frontend
-          npm run build
-
-      # Deploy to Azure SWA
-      - name: Deploy to Azure SWA
-        uses: azure/static-web-apps-deploy@v1
-        with:
-          action: "upload"
-          app_location: 'frontend'
-          output_location: 'dist'
-          azure_static_web_apps_api_token: ${{ secrets.AZURE_SWA_TOKEN }}

.gitignore

@@ -22,6 +22,10 @@ Thumbs.db
 # .NET
 bin/
 obj/
+**/[Bb]in/
+**/[Oo]bj/
+**/[Bb]in[\\]*
+**/[Oo]bj[\\]*
 TestResults/
 
 # Node
@@ -30,6 +34,7 @@ dist/
 .vite/
 
 # Local environment files
+.env
 *.local
 .env.local
 .env.*.local
@@ -38,5 +43,11 @@ App_Data/
 # Local SSL certificates
 *.pem
 
-# Ai
+# AI agent local state
+.agents
+.agents/
 .codex
+.codex/
+
+# Generated local artifacts
+.artifacts/

README.md

@@ -76,6 +76,12 @@ http://localhost:8080
 http://<this-machine-lan-ip>:8080
 ```
 
+For preprod deployment, configure the `POSTGRES_PASSWORD`, `RESEND_API_KEY`,
+`RESEND_FROM_EMAIL`, and `JWT_SIGNING_KEY` Gitea secrets.
+The deploy workflow writes the remote `.env` file and syncs `deploy/compose.yml`
+before running the server deploy script.
+Use the raw Resend API key value for `RESEND_API_KEY`, without a `Bearer ` prefix.
+
 ## Solution
 
 ```bash
@@ -90,6 +96,24 @@ cd frontend
 npm run build
 ```
 
+## Database Diagram
+
+Start PostgreSQL, then generate a local schema diagram:
+
+```bash
+./scripts/generate-db-diagram.sh
+```
+
+The script writes an HTML viewer, SVG, PNG, and Graphviz source under:
+
+```txt
+.artifacts/db-diagrams/
+```
+
+Use `DATABASE_URL`, `PGPASSWORD`, or `~/.pgpass` to provide local database credentials.
+When using the repository infrastructure script, the diagram script can read from the
+running `socialize-postgres` container directly.
+
 ## Agentic Workflow
 
 Start here:

backend/.github/workflows/build.yml

@@ -1,82 +0,0 @@
-name: Build
-
-on:
-  pull_request:
-    branches: [ main ]
-    paths-ignore:
-      - '.scripts/**'
-      - .gitignore
-      - CODE_OF_CONDUCT.md
-      - LICENSE
-      - README.md
-
-  workflow_call:
-    inputs:
-      build-artifacts:
-        type: boolean
-        required: true
-        default: false
-
-jobs:
-  build:
-
-    runs-on: ubuntu-latest
-
-    steps:
-    - uses: actions/checkout@v3
-      name: Checkout code
-
-    - name: Cache NuGet packages
-      uses: actions/cache@v3
-      with:
-        path: ~/.nuget/packages
-        key: ${{ runner.os }}-nuget-${{ hashFiles('**/packages.lock.json') }}
-        restore-keys: |
-          ${{ runner.os }}-nuget-
-
-
-    - name: Install .NET
-      uses: actions/setup-dotnet@v3
-
-    - name: Restore solution
-      run: dotnet restore
-
-    - name: Build solution
-      run: dotnet build --no-restore --configuration Release
-      
-    - name: Test solution
-      run: dotnet test --no-build --configuration Release --filter "FullyQualifiedName!~AcceptanceTests"
-
-    - name: Publish website
-      if: ${{ inputs.build-artifacts == true }}
-      run: |
-        dotnet publish --configuration Release --runtime win-x86 --self-contained --output ./publish
-        cd publish
-        zip -r ./publish.zip .
-      working-directory: ./src/Web/
-
-    - name: Upload website artifact (website)
-      if: ${{ inputs.build-artifacts == true }}
-      uses: actions/upload-artifact@v3
-      with:
-        name: website
-        path: ./src/Web/publish/publish.zip
-        if-no-files-found: error
-    
-    - name: Create EF Core migrations bundle
-      if: ${{ inputs.build-artifacts == true }}
-      run: |
-        dotnet new tool-manifest
-        dotnet tool install dotnet-ef
-        dotnet ef migrations bundle --configuration Release -p ./src/Infrastructure/ -s ./src/Web/ -o efbundle.exe
-        zip -r ./efbundle.zip efbundle.exe
-      env:
-        SkipNSwag: True
-
-    - name: Upload EF Core migrations bundle artifact (efbundle)
-      if: ${{ inputs.build-artifacts == true }}
-      uses: actions/upload-artifact@v3
-      with:
-        name: efbundle
-        path: ./efbundle.zip
-        if-no-files-found: error

backend/.github/workflows/cicd.yml

@@ -1,42 +0,0 @@
-name: CICD
-
-on: 
-  push:
-    branches: [ main ]
-    paths-ignore:
-      - .gitignore
-      - CODE_OF_CONDUCT.md
-      - LICENSE
-      - README.md
-
-permissions:
-  id-token: write
-  contents: read
-
-jobs:
-
-  build:
-    uses: ./.github/workflows/build.yml
-    with:
-      build-artifacts: true
-
-  deploy-development:
-    uses: ./.github/workflows/deploy.yml
-    secrets: inherit
-    needs: [ build ]
-    with:
-      environmentName: Development
-
-  deploy-staging:
-    uses: ./.github/workflows/deploy.yml
-    secrets: inherit
-    needs: [ deploy-development ]
-    with:
-      environmentName: Staging
-
-  deploy-production:
-    uses: ./.github/workflows/deploy.yml
-    secrets: inherit
-    needs: [ deploy-staging ]
-    with:
-      environmentName: Production

backend/.github/workflows/deploy.yml

@@ -1,107 +0,0 @@
-name: Deploy
-
-on:
-  workflow_call:
-    inputs:
-      environmentName:
-        required: true
-        type: string
-
-permissions:
-  id-token: write
-  contents: read
-
-jobs:
-  
-  validate:
-     runs-on: ubuntu-latest
-     environment: ${{ inputs.environmentName }}
-
-     steps: 
-
-     - uses: actions/checkout@v3
-       name: Checkout code
-
-     - uses: azure/login@v1
-       name: Login to Azure
-       with:
-         client-id: ${{ vars.AZURE_CLIENT_ID }}
-         tenant-id: ${{ vars.AZURE_TENANT_ID }}
-         subscription-id: ${{ vars.AZURE_SUBSCRIPTION_ID }}
-
-     - if: inputs.environmentName == 'Development'
-       uses: azure/arm-deploy@v1
-       name: Run preflight validation
-       with:
-         deploymentName: ${{ github.run_number }}
-         resourceGroupName: ${{ vars.AZURE_RESOURCE_GROUP_NAME }}
-         template: ./.azure/bicep/main.bicep
-         parameters: >
-           environmentName=${{ inputs.environmentName }}
-           sqlAdministratorUsername=${{ vars.AZURE_SQL_ADMINISTRATOR_USERNAME }}
-           sqlAdministratorPassword=${{ secrets.AZURE_SQL_ADMINISTRATOR_PASSWORD }}
-           projectName=${{ vars.PROJECT_NAME }}
-         deploymentMode: Validate
-
-     - if: inputs.environmentName != 'Development'
-       uses: azure/arm-deploy@v1
-       name: Run what-if
-       with:
-         failOnStdErr: false
-         resourceGroupName: ${{ vars.AZURE_RESOURCE_GROUP_NAME }}
-         template: ./.azure/bicep/main.bicep
-         parameters: >
-           environmentName=${{ inputs.environmentName }}
-           sqlAdministratorUsername=${{ vars.AZURE_SQL_ADMINISTRATOR_USERNAME }}
-           sqlAdministratorPassword=${{ secrets.AZURE_SQL_ADMINISTRATOR_PASSWORD }}
-           projectName=${{ vars.PROJECT_NAME }}
-         additionalArguments: --what-if
- 
-  deploy:
-    needs: [ validate ]
-    runs-on: ubuntu-latest
-    environment: ${{ inputs.environmentName }}
-
-    steps:
-
-    - uses: actions/checkout@v3
-      name: Checkout code
-
-    - uses: actions/download-artifact@v3
-      name: Download artifacts
-
-    - name: Install .NET
-      uses: actions/setup-dotnet@v3
-
-    - uses: azure/login@v1
-      name: Login to Azure
-      with:
-        client-id: ${{ vars.AZURE_CLIENT_ID }}
-        tenant-id: ${{ vars.AZURE_TENANT_ID }}
-        subscription-id: ${{ vars.AZURE_SUBSCRIPTION_ID }}
-
-    - uses: azure/arm-deploy@v1
-      id: deploy
-      name: Deploy infrastructure
-      with:
-        failOnStdErr: false
-        deploymentName: ${{ github.run_number }}
-        resourceGroupName: ${{ vars.AZURE_RESOURCE_GROUP_NAME }}
-        template: ./.azure/bicep/main.bicep
-        parameters: >
-           environmentName=${{ inputs.environmentName }}
-           sqlAdministratorUsername=${{ vars.AZURE_SQL_ADMINISTRATOR_USERNAME }}
-           sqlAdministratorPassword=${{ secrets.AZURE_SQL_ADMINISTRATOR_PASSWORD }}
-           projectName=${{ vars.PROJECT_NAME }}
-
-    - name: Initialise database
-      run: |
-        unzip -o ./efbundle/efbundle.zip
-        echo '{ "ConnectionStrings": { "DefaultConnection": "" } }' > appsettings.json
-        ./efbundle.exe --connection "Server=${{ steps.deploy.outputs.sqlServerFullyQualifiedDomainName }};Initial Catalog=${{ steps.deploy.outputs.sqlDatabaseName }};Persist Security Info=False;User ID=${{ vars.AZURE_SQL_ADMINISTRATOR_USERNAME }};Password=${{ secrets.AZURE_SQL_ADMINISTRATOR_PASSWORD }};MultipleActiveResultSets=False;Encrypt=True;TrustServerCertificate=False;Connection Timeout=30;" --verbose
-
-    - uses: azure/webapps-deploy@v2
-      name: Deploy website
-      with:
-        app-name: ${{ steps.deploy.outputs.appServiceAppName }}
-        package: website/publish.zip

backend/src/Socialize.Api/ApplicationRegistration.cs

@@ -11,7 +11,7 @@ using Microsoft.IdentityModel.Tokens;
 
 namespace Socialize;
 
-public static class DependencyInjection
+internal static class ApplicationRegistration
 {
     public static IServiceCollection AddWebServices(this IServiceCollection services)
     {
@@ -70,7 +70,6 @@ public static class DependencyInjection
         {
             authenticationBuilder.AddJwtBearer(JwtBearerDefaults.AuthenticationScheme, jwtBearerOptions =>
             {
-                jwtBearerOptions.Authority = "https://hutopy.com";
                 jwtBearerOptions.TokenValidationParameters = new TokenValidationParameters
                 {
                     ValidateIssuer = true,
@@ -79,7 +78,7 @@ public static class DependencyInjection
                     ValidAudience = authJwt["Audience"],
                     ValidateLifetime = true,
                     IssuerSigningKey = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(authJwt["Key"] ??
-                        throw new ArgumentNullException("The Jwt Key is missing.")))
+                        throw new InvalidOperationException("Authentication:Jwt:Key is required.")))
                 };
             });
         }
@@ -90,9 +89,9 @@ public static class DependencyInjection
             authenticationBuilder.AddGoogle(GoogleDefaults.AuthenticationScheme, options =>
             {
                 options.ClientId = authGoogle["ClientId"] ??
-                                   throw new ArgumentNullException("The Google ClientId is missing.");
+                                   throw new InvalidOperationException("Authentication:Google:ClientId is required.");
                 options.ClientSecret = authGoogle["ClientSecret"] ??
-                                       throw new ArgumentNullException("The Google ClientSecret is missing.");
+                                       throw new InvalidOperationException("Authentication:Google:ClientSecret is required.");
             });
         }
 
@@ -102,9 +101,9 @@ public static class DependencyInjection
             authenticationBuilder.AddFacebook(FacebookDefaults.AuthenticationScheme, options =>
             {
                 options.ClientId = authFacebook["ClientId"] ??
-                                   throw new ArgumentNullException("The Facebook ClientId is missing.");
+                                   throw new InvalidOperationException("Authentication:Facebook:ClientId is required.");
                 options.ClientSecret = authFacebook["ClientSecret"] ??
-                                       throw new ArgumentNullException("The Facebook ClientSecret is missing.");
+                                       throw new InvalidOperationException("Authentication:Facebook:ClientSecret is required.");
             });
         }
 

backend/src/Socialize.Api/Common/Domain/Entity.cs

@@ -1,6 +1,6 @@
 namespace Socialize.Api.Common.Domain;
 
-public abstract class Entity
+internal abstract class Entity
 {
     public Guid Id { get; init; }
     public Guid CreatedBy { get; init; }

backend/src/Socialize.Api/Data/AppDbContext.cs

@@ -2,6 +2,7 @@ using Microsoft.EntityFrameworkCore;
 using Microsoft.AspNetCore.Identity.EntityFrameworkCore;
 using Socialize.Api.Modules.Approvals.Data;
 using Socialize.Api.Modules.Assets.Data;
+using Socialize.Api.Modules.Channels.Data;
 using Socialize.Api.Modules.Clients.Data;
 using Socialize.Api.Modules.Comments.Data;
 using Socialize.Api.Modules.ContentItems.Data;
@@ -9,23 +10,30 @@ using Socialize.Api.Modules.Feedback.Data;
 using Socialize.Api.Modules.Identity.Data;
 using Socialize.Api.Modules.Notifications.Data;
 using Socialize.Api.Modules.Campaigns.Data;
+using Socialize.Api.Modules.CalendarIntegrations.Data;
 using Socialize.Api.Modules.Organizations.Data;
+using Socialize.Api.Modules.ReleaseCommunications.Data;
 using Socialize.Api.Modules.Workspaces.Data;
 
 namespace Socialize.Api.Data;
 
-public class AppDbContext(
+internal class AppDbContext(
     DbContextOptions<AppDbContext> options)
     : IdentityDbContext<User, Role, Guid>(options)
 {
     public DbSet<Organization> Organizations => Set<Organization>();
+    public DbSet<OrganizationMembershipTier> OrganizationMembershipTiers => Set<OrganizationMembershipTier>();
+    public DbSet<OrganizationMembershipTierTranslation> OrganizationMembershipTierTranslations =>
+        Set<OrganizationMembershipTierTranslation>();
     public DbSet<OrganizationMembership> OrganizationMemberships => Set<OrganizationMembership>();
     public DbSet<Workspace> Workspaces => Set<Workspace>();
     public DbSet<WorkspaceInvite> WorkspaceInvites => Set<WorkspaceInvite>();
+    public DbSet<Channel> Channels => Set<Channel>();
     public DbSet<Client> Clients => Set<Client>();
     public DbSet<Campaign> Campaigns => Set<Campaign>();
     public DbSet<ContentItem> ContentItems => Set<ContentItem>();
     public DbSet<ContentItemRevision> ContentItemRevisions => Set<ContentItemRevision>();
+    public DbSet<ContentItemActivityEntry> ContentItemActivityEntries => Set<ContentItemActivityEntry>();
     public DbSet<Asset> Assets => Set<Asset>();
     public DbSet<AssetRevision> AssetRevisions => Set<AssetRevision>();
     public DbSet<Comment> Comments => Set<Comment>();
@@ -39,6 +47,14 @@ public class AppDbContext(
     public DbSet<FeedbackScreenshot> FeedbackScreenshots => Set<FeedbackScreenshot>();
     public DbSet<FeedbackComment> FeedbackComments => Set<FeedbackComment>();
     public DbSet<FeedbackActivityEntry> FeedbackActivityEntries => Set<FeedbackActivityEntry>();
+    public DbSet<CalendarSource> CalendarSources => Set<CalendarSource>();
+    public DbSet<CalendarCatalogEntry> CalendarCatalogEntries => Set<CalendarCatalogEntry>();
+    public DbSet<CalendarEvent> CalendarEvents => Set<CalendarEvent>();
+    public DbSet<UserCalendarExportFeed> UserCalendarExportFeeds => Set<UserCalendarExportFeed>();
+    public DbSet<ReleaseUpdate> ReleaseUpdates => Set<ReleaseUpdate>();
+    public DbSet<ReleaseUpdateReadReceipt> ReleaseUpdateReadReceipts => Set<ReleaseUpdateReadReceipt>();
+    public DbSet<ReleaseCommit> ReleaseCommits => Set<ReleaseCommit>();
+    public DbSet<ReleaseUpdateEmailDigestReceipt> ReleaseUpdateEmailDigestReceipts => Set<ReleaseUpdateEmailDigestReceipt>();
 
     protected override void OnModelCreating(ModelBuilder builder)
     {
@@ -46,6 +62,7 @@ public class AppDbContext(
 
         builder.ConfigureOrganizationsModule();
         builder.ConfigureWorkspacesModule();
+        builder.ConfigureChannelsModule();
         builder.ConfigureClientsModule();
         builder.ConfigureCampaignsModule();
         builder.ConfigureContentItemsModule();
@@ -54,5 +71,7 @@ public class AppDbContext(
         builder.ConfigureApprovalsModule();
         builder.ConfigureNotificationsModule();
         builder.ConfigureFeedbackModule();
+        builder.ConfigureCalendarIntegrationsModule();
+        builder.ConfigureReleaseCommunicationsModule();
     }
 }

backend/src/Socialize.Api/Folder.DotSettings

@@ -1,5 +0,0 @@
-<wpf:ResourceDictionary xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
-                        xmlns:s="clr-namespace:System;assembly=mscorlib"
-                        xmlns:wpf="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
-                        xml:space="preserve">
-	<s:Boolean x:Key="/Default/UserDictionary/Words/=hutopy/@EntryIndexedValue">True</s:Boolean></wpf:ResourceDictionary>

backend/src/Socialize.Api/Infrastructure/BlobStorage/Configuration/LocalBlobStorageOptions.cs

@@ -1,6 +1,6 @@
 namespace Socialize.Api.Infrastructure.BlobStorage.Configuration;
 
-public sealed class LocalBlobStorageOptions
+internal sealed class LocalBlobStorageOptions
 {
     public const string SectionName = "LocalBlobStorage";
 

backend/src/Socialize.Api/Infrastructure/BlobStorage/Contracts/CommonFileNames.cs

@@ -1,6 +1,6 @@
 namespace Socialize.Api.Infrastructure.BlobStorage.Contracts;
 
-public static class CommonFileNames
+internal static class CommonFileNames
 {
     public const string ProfilePicture = "profilePicture";
     public const string LogoPicture = "logoPicture";

backend/src/Socialize.Api/Infrastructure/BlobStorage/Contracts/ContainerNames.cs

@@ -4,6 +4,7 @@ internal static class ContainerNames
 {
     public const string Users = "users";
     public const string Clients = "clients";
+    public const string Organizations = "organizations";
     public const string Workspaces = "workspaces";
     public const string Creators = "creators";
     public const string Feedback = "feedback";

backend/src/Socialize.Api/Infrastructure/BlobStorage/Contracts/ContentTypes.cs

@@ -2,7 +2,7 @@
 
 namespace Socialize.Api.Infrastructure.BlobStorage.Contracts;
 
-public static class ContentTypes
+internal static class ContentTypes
 {
     private const string ImagePng = "image/png";
     private const string ImageJpeg = "image/jpeg";
@@ -39,6 +39,6 @@ public static class ContentTypes
 
         // Check for HTML content by looking for "<!DOCTYPE html>" or "<html>" tags
         string content = Encoding.UTF8.GetString(buffer);
-        return content.Contains("<!DOCTYPE html>");
+        return content.Contains("<!DOCTYPE html>", StringComparison.OrdinalIgnoreCase);
     }
 }

backend/src/Socialize.Api/Infrastructure/BlobStorage/Contracts/IBlobStorage.cs

@@ -1,6 +1,6 @@
 namespace Socialize.Api.Infrastructure.BlobStorage.Contracts;
 
-public interface IBlobStorage
+internal interface IBlobStorage
 {
     /// <summary>
     ///     Upload a file to blob storage.

backend/src/Socialize.Api/Infrastructure/BlobStorage/Contracts/SubDirectoryNames.cs

@@ -1,6 +1,6 @@
 namespace Socialize.Api.Infrastructure.BlobStorage.Contracts;
 
-public static class SubDirectoryNames
+internal static class SubDirectoryNames
 {
     public const string Profile = "profile";
     public const string Contents = "contents";

backend/src/Socialize.Api/Infrastructure/BlobStorage/Services/LocalBlobStorage.cs

@@ -4,7 +4,7 @@ using Socialize.Api.Infrastructure.BlobStorage.Contracts;
 
 namespace Socialize.Api.Infrastructure.BlobStorage.Services;
 
-public sealed class LocalBlobStorage(
+internal sealed class LocalBlobStorage(
     IWebHostEnvironment environment,
     IHttpContextAccessor httpContextAccessor,
     IOptions<LocalBlobStorageOptions> options,
@@ -14,6 +14,14 @@ public sealed class LocalBlobStorage(
     private const long MaxUploadSize = 10 * 1024 * 1024;
     private const string ContentTypeMetadataSuffix = ".content-type";
 
+    private static readonly char[] PathSeparators = [Path.DirectorySeparatorChar, Path.AltDirectorySeparatorChar];
+
+    private static readonly Action<ILogger, string, string, string, string, Exception?> LogUploadedFile =
+        LoggerMessage.Define<string, string, string, string>(
+            LogLevel.Information,
+            new EventId(1, nameof(UploadFileAsync)),
+            "Blob storage: Uploaded [{BlobName}] to local container [{ContainerName}] with contentType [{ContentType}] and uri [{FileUri}]");
+
     private readonly LocalBlobStorageOptions _options = options.Value;
 
     public async Task<string> UploadFileAsync(
@@ -46,12 +54,7 @@ public sealed class LocalBlobStorage(
         await File.WriteAllTextAsync(GetContentTypeMetadataPath(filePath), contentType, ct);
 
         string fileUri = BuildPublicUrl(relativePath);
-        logger.LogInformation(
+        LogUploadedFile(logger, blobName, containerName, contentType, fileUri, null);
-            "Blob storage: Uploaded [{BlobName}] to local container [{ContainerName}] with contentType [{ContentType}] and uri [{FileUri}]",
-            blobName,
-            containerName,
-            contentType,
-            fileUri);
 
         return fileUri;
     }
@@ -106,7 +109,7 @@ public sealed class LocalBlobStorage(
             throw new InvalidOperationException("Blob storage: Blob paths must be relative.");
         }
 
-        string[] pathParts = [containerName, .. blobName.Split([Path.DirectorySeparatorChar, Path.AltDirectorySeparatorChar])];
+        string[] pathParts = [containerName, .. blobName.Split(PathSeparators)];
         if (pathParts.Any(part => part is "" or "." or ".."))
         {
             throw new InvalidOperationException("Blob storage: Blob paths must not contain relative path segments.");
@@ -135,7 +138,7 @@ public sealed class LocalBlobStorage(
             ? "/api/storage"
             : requestPath.Trim();
 
-        return normalized.StartsWith("/", StringComparison.Ordinal)
+        return normalized.StartsWith('/')
             ? normalized.TrimEnd('/')
             : $"/{normalized.TrimEnd('/')}";
     }

backend/src/Socialize.Api/Infrastructure/Configuration/WebsiteOptions.cs

@@ -1,6 +1,6 @@
 namespace Socialize.Api.Infrastructure.Configuration;
 
-public class WebsiteOptions
+internal class WebsiteOptions
 {
     public const string SectionName = "Website";
 

backend/src/Socialize.Api/Infrastructure/Development/DevelopmentSeedOptions.cs

@@ -1,8 +0,0 @@
-namespace Socialize.Api.Infrastructure.Development;
-
-public record DevelopmentSeedOptions
-{
-    public const string SectionName = "DevelopmentSeed";
-
-    public bool Enabled { get; init; } = true;
-}

backend/src/Socialize.Api/Infrastructure/Emailer/Configuration/EmailerOptions.cs

@@ -1,6 +1,6 @@
 namespace Socialize.Api.Infrastructure.Emailer.Configuration;
 
-public class EmailerOptions
+internal class EmailerOptions
 {
     public const string ConfigurationSection = "Emailer";
 

backend/src/Socialize.Api/Infrastructure/Emailer/Contracts/IEmailSender.cs

@@ -1,6 +1,6 @@
 namespace Socialize.Api.Infrastructure.Emailer.Contracts;
 
-public interface IEmailSender
+internal interface IEmailSender
 {
     Task SendEmailAsync(string email, string subject, string message);
 }

backend/src/Socialize.Api/Infrastructure/Emailer/Services/LoggerEmailSender.cs

@@ -2,21 +2,19 @@ using Socialize.Api.Infrastructure.Emailer.Contracts;
 
 namespace Socialize.Api.Infrastructure.Emailer.Services;
 
-public class LoggerEmailSender(ILogger<IEmailSender> logger)
+internal class LoggerEmailSender(ILogger<IEmailSender> logger)
     : IEmailSender
 {
-    public async Task SendEmailAsync(string email, string subject, string message)
+    private static readonly Action<ILogger, string, string, string, string, Exception?> LogDevelopmentEmail =
+        LoggerMessage.Define<string, string, string, string>(
+            LogLevel.Information,
+            new EventId(1, nameof(SendEmailAsync)),
+            "Development email to {Email} with subject {Subject}:{NewLine}{Message}");
+
+    public Task SendEmailAsync(string email, string subject, string message)
     {
-        try
+        LogDevelopmentEmail(logger, email, subject, Environment.NewLine, message, null);
-        {
+
-            logger.LogInformation("Sending email to {Email} with subject: {Subject}", email, subject);
+        return Task.CompletedTask;
-            await Task.Delay(1000);
-            logger.LogInformation("Email sent successfully to {Email}", email);
-        }
-        catch (Exception ex)
-        {
-            logger.LogError(ex, "Failed to send email to {Email}", email);
-            throw;
-        }
     }
 }

backend/src/Socialize.Api/Infrastructure/Emailer/Services/PostmarkEmailSender.cs

@@ -5,7 +5,7 @@ using PostmarkDotNet;
 
 namespace Socialize.Api.Infrastructure.Emailer.Services;
 
-public class PostmarkEmailSender : IEmailSender
+internal class PostmarkEmailSender : IEmailSender
 {
     private readonly PostmarkClient _client;
     private readonly EmailerOptions _options;

backend/src/Socialize.Api/Infrastructure/Emailer/Services/ResendEmailSender.cs

@@ -7,7 +7,7 @@ using Microsoft.Extensions.Options;
 
 namespace Socialize.Api.Infrastructure.Emailer.Services;
 
-public class ResendEmailSender : IEmailSender
+internal class ResendEmailSender : IEmailSender
 {
     private static readonly Uri EndpointUri = new("https://api.resend.com/emails");
     private readonly HttpClient _httpClient;
@@ -20,21 +20,36 @@ public class ResendEmailSender : IEmailSender
         _httpClient = httpClientFactory.CreateClient();
         _options = options.Value;
 
+        string apiKey = NormalizeApiKey(_options.ApiKey);
+        string fromEmail = _options.FromEmail?.Trim() ?? string.Empty;
+
+        if (string.IsNullOrWhiteSpace(apiKey))
+        {
+            throw new InvalidOperationException("Emailer:ApiKey is required when using Resend email delivery.");
+        }
+
+        if (string.IsNullOrWhiteSpace(fromEmail))
+        {
+            throw new InvalidOperationException("Emailer:FromEmail is required when using Resend email delivery.");
+        }
+
+        _options.ApiKey = apiKey;
+        _options.FromEmail = fromEmail;
+
         _httpClient.DefaultRequestHeaders.Authorization =
-            new AuthenticationHeaderValue("Bearer", _options.ApiKey);
+            new AuthenticationHeaderValue("Bearer", apiKey);
 
         _httpClient.DefaultRequestHeaders.Accept.Add(
             new MediaTypeWithQualityHeaderValue("application/json"));
     }
 
-    public async Task SendEmailAsync(string toEmail, string subject, string htmlMessage)
+    public async Task SendEmailAsync(string email, string subject, string message)
     {
-        var payload = new { from = _options.FromEmail, to = toEmail, subject, html = htmlMessage };
+        var payload = new { from = _options.FromEmail, to = email, subject, html = message };
 
         string json = JsonSerializer.Serialize(payload);
-        StringContent content = new(json, Encoding.UTF8, "application/json");
+        using StringContent content = new(json, Encoding.UTF8, "application/json");
-
+        using HttpResponseMessage response = await _httpClient.PostAsync(EndpointUri, content);
-        HttpResponseMessage response = await _httpClient.PostAsync(EndpointUri, content);
 
         if (!response.IsSuccessStatusCode)
         {
@@ -43,4 +58,16 @@ public class ResendEmailSender : IEmailSender
                 $"Resend email failed: {response.StatusCode} - {body}");
         }
     }
+
+    private static string NormalizeApiKey(string? apiKey)
+    {
+        string normalized = apiKey?.Trim().Trim('"', '\'') ?? string.Empty;
+        const string bearerPrefix = "Bearer ";
+        if (normalized.StartsWith(bearerPrefix, StringComparison.OrdinalIgnoreCase))
+        {
+            normalized = normalized[bearerPrefix.Length..].Trim();
+        }
+
+        return normalized;
+    }
 }

backend/src/Socialize.Api/Infrastructure/InfrastructureRegistration.cs

@@ -9,7 +9,7 @@ using Socialize.Api.Infrastructure.Payments.Stripe.Configuration;
 
 namespace Socialize.Api.Infrastructure;
 
-public static class DependencyInjection
+internal static class InfrastructureRegistration
 {
     public static WebApplicationBuilder AddInfrastructureModule(
         this WebApplicationBuilder builder)
@@ -26,8 +26,14 @@ public static class DependencyInjection
 
         builder.Services.Configure<EmailerOptions>(
             builder.Configuration.GetSection(EmailerOptions.ConfigurationSection));
+        if (builder.Environment.IsDevelopment())
+        {
+            builder.Services.AddTransient<IEmailSender, LoggerEmailSender>();
+        }
+        else
+        {
             builder.Services.AddTransient<IEmailSender, ResendEmailSender>();
-        //builder.Services.AddTransient<IEmailSender, EmailSender>();
+        }
 
         builder.Services.AddHttpClient();
 

backend/src/Socialize.Api/Infrastructure/Payments/Stripe/Configuration/StripeOptions.cs

@@ -2,7 +2,7 @@ using System.ComponentModel.DataAnnotations;
 
 namespace Socialize.Api.Infrastructure.Payments.Stripe.Configuration;
 
-public class StripeOptions
+internal class StripeOptions
 {
     public const string ConfigurationSection = "Stripe";
 

backend/src/Socialize.Api/Infrastructure/Security/AccessScopeService.cs

@@ -4,52 +4,52 @@ using Socialize.Api.Modules.Organizations.Services;
 
 namespace Socialize.Api.Infrastructure.Security;
 
-public sealed class AccessScopeService(
+internal sealed class AccessScopeService(
     OrganizationAccessService organizationAccessService)
 {
-    public bool IsManager(ClaimsPrincipal user)
+    public static bool IsManager(ClaimsPrincipal user)
     {
         return user.IsInRole(KnownRoles.Administrator) || user.IsInRole(KnownRoles.Manager);
     }
 
-    public bool IsProvider(ClaimsPrincipal user)
+    public static bool IsProvider(ClaimsPrincipal user)
     {
         return user.IsInRole(KnownRoles.Provider);
     }
 
-    public bool IsClient(ClaimsPrincipal user)
+    public static bool IsClient(ClaimsPrincipal user)
     {
         return user.IsInRole(KnownRoles.Client);
     }
 
-    public bool CanAccessWorkspace(ClaimsPrincipal user, Guid workspaceId)
+    public static bool CanAccessWorkspace(ClaimsPrincipal user, Guid workspaceId)
     {
         return IsManager(user) || user.GetWorkspaceScopeIds().Contains(workspaceId);
     }
 
-    public bool CanManageWorkspace(ClaimsPrincipal user, Guid workspaceId)
+    public static bool CanManageWorkspace(ClaimsPrincipal user, Guid workspaceId)
     {
         return IsManager(user) && CanAccessWorkspace(user, workspaceId);
     }
 
-    public bool CanAccessClient(ClaimsPrincipal user, Guid workspaceId, Guid clientId)
+    public static bool CanAccessClient(ClaimsPrincipal user, Guid workspaceId, Guid clientId)
     {
         return IsManager(user)
                || (CanAccessWorkspace(user, workspaceId) && user.GetClientScopeIds().Contains(clientId));
     }
 
-    public bool CanAccessCampaign(ClaimsPrincipal user, Guid workspaceId, Guid clientId, Guid campaignId)
+    public static bool CanAccessCampaign(ClaimsPrincipal user, Guid workspaceId, Guid clientId, Guid campaignId)
     {
         return IsManager(user)
                || (CanAccessClient(user, workspaceId, clientId) && user.GetCampaignScopeIds().Contains(campaignId));
     }
 
-    public bool CanContributeToCampaign(ClaimsPrincipal user, Guid workspaceId, Guid clientId, Guid campaignId)
+    public static bool CanContributeToCampaign(ClaimsPrincipal user, Guid workspaceId, Guid clientId, Guid campaignId)
     {
         return IsManager(user) || (IsProvider(user) && CanAccessCampaign(user, workspaceId, clientId, campaignId));
     }
 
-    public bool CanReviewContent(ClaimsPrincipal user, Guid workspaceId, Guid clientId, Guid campaignId)
+    public static bool CanReviewContent(ClaimsPrincipal user, Guid workspaceId, Guid clientId, Guid campaignId)
     {
         return IsManager(user)
                || IsProvider(user) && CanAccessCampaign(user, workspaceId, clientId, campaignId)

backend/src/Socialize.Api/Infrastructure/Security/ClaimsPrincipalExtensions.cs

@@ -1,8 +1,9 @@
-using System.Security.Claims;
+using System.Globalization;
+using System.Security.Claims;
 
 namespace Socialize.Api.Infrastructure.Security;
 
-public static class ClaimsPrincipalExtensions
+internal static class ClaimsPrincipalExtensions
 {
     public static IReadOnlyCollection<Guid> GetScopeIds(this ClaimsPrincipal claims, string key)
     {
@@ -81,11 +82,11 @@ public static class ClaimsPrincipalExtensions
 
         if (claim is null)
         {
-            throw new MissingClaimException(key);
+            throw MissingClaimException.ForClaim(key);
         }
 
         return typeof(TValue) == typeof(Guid)
             ? Guid.Parse(claim.Value)
-            : Convert.ChangeType(claim.Value, typeof(TValue));
+            : Convert.ChangeType(claim.Value, typeof(TValue), CultureInfo.InvariantCulture);
     }
 }

backend/src/Socialize.Api/Infrastructure/Security/GenerateJwtToken.cs

@@ -5,7 +5,7 @@ using Microsoft.IdentityModel.Tokens;
 
 namespace Socialize.Api.Infrastructure.Security;
 
-public static class JwtTokenHelper
+internal static class JwtTokenHelper
 {
     public static string GenerateJwtToken(
         TimeSpan expiresIn,

backend/src/Socialize.Api/Infrastructure/Security/KnownClaims.cs

@@ -1,6 +1,6 @@
 namespace Socialize.Api.Infrastructure.Security;
 
-public static class KnownClaims
+internal static class KnownClaims
 {
     public const string Alias = "alias";
     public const string PortraitUrl = "portraitUrl";

backend/src/Socialize.Api/Infrastructure/Security/MissingClaimException.cs

@@ -1,5 +1,23 @@
 namespace Socialize.Api.Infrastructure.Security;
 
-public class MissingClaimException(
+public class MissingClaimException : Exception
-    string claimName)
+{
-    : Exception($"Claim '{claimName}' is missing.");
+    public MissingClaimException()
+    {
+    }
+
+    public MissingClaimException(string message)
+        : base(message)
+    {
+    }
+
+    public MissingClaimException(string message, Exception innerException)
+        : base(message, innerException)
+    {
+    }
+
+    internal static MissingClaimException ForClaim(string claimName)
+    {
+        return new MissingClaimException($"Claim '{claimName}' is missing.");
+    }
+}

backend/src/Socialize.Api/Infrastructure/Security/PasswordGenerator.cs

@@ -4,15 +4,13 @@ using System.Text;
 namespace Socialize.Api.Infrastructure.Security;
 
 // If we need to add special characters we can alternate between 2 pools.
-public static class PasswordGenerator
+internal static class PasswordGenerator
 {
     private const string LowerLetters = "abcdefghijklmnopqrstuvwxyz";
     private const string UpperLetters = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
     private const string Numbers = "0123456789";
     private const string SpecialCharacters = "!@#$%^&*()_+-=[];',./`~{}|:\"<>?";
 
-    private static readonly Random Random = new();
-
     public static string Next(
         int length = 15,
         bool requireNumber = true,
@@ -23,7 +21,7 @@ public static class PasswordGenerator
         // Create pools based on the requirements
         StringBuilder characterPool = new();
 
-        if (requireNumber)
+        if (requireLowercase)
         {
             characterPool.Append(LowerLetters);
         }
@@ -51,22 +49,22 @@ public static class PasswordGenerator
 
         if (requireLowercase)
         {
-            password[index++] = LowerLetters[Random.Next(LowerLetters.Length)];
+            password[index++] = LowerLetters[RandomNumberGenerator.GetInt32(LowerLetters.Length)];
         }
 
         if (requireCapital)
         {
-            password[index++] = UpperLetters[Random.Next(UpperLetters.Length)];
+            password[index++] = UpperLetters[RandomNumberGenerator.GetInt32(UpperLetters.Length)];
         }
 
         if (requireNumber)
         {
-            password[index++] = Numbers[Random.Next(Numbers.Length)];
+            password[index++] = Numbers[RandomNumberGenerator.GetInt32(Numbers.Length)];
         }
 
         if (requireSpecialCharacter)
         {
-            password[index++] = SpecialCharacters[Random.Next(SpecialCharacters.Length)];
+            password[index++] = SpecialCharacters[RandomNumberGenerator.GetInt32(SpecialCharacters.Length)];
         }
 
         // Fill the rest with the password
@@ -85,7 +83,7 @@ public static class PasswordGenerator
     {
         for (int i = array.Length - 1; i > 0; i--)
         {
-            int j = Random.Next(i + 1);
+            int j = RandomNumberGenerator.GetInt32(i + 1);
             (array[i], array[j]) = (array[j], array[i]); // Swap elements
         }
     }

backend/src/Socialize.Api/Infrastructure/Security/RefreshTokenGenerator.cs

@@ -2,7 +2,7 @@ using System.Security.Cryptography;
 
 namespace Socialize.Api.Infrastructure.Security;
 
-public static class RefreshTokenGenerator
+internal static class RefreshTokenGenerator
 {
     public static string Next()
     {

backend/src/Socialize.Api/Infrastructure/TestData/TestDataSeedExtensions.cs

@@ -6,6 +6,7 @@ using Socialize.Api.Modules.Identity.Contracts;
 using Socialize.Api.Modules.Identity.Data;
 using Socialize.Api.Modules.Assets.Data;
 using Socialize.Api.Modules.Approvals.Data;
+using Socialize.Api.Modules.Channels.Data;
 using Socialize.Api.Modules.Comments.Data;
 using Socialize.Api.Modules.ContentItems.Data;
 using Socialize.Api.Modules.Clients.Data;
@@ -14,19 +15,25 @@ using Socialize.Api.Modules.Campaigns.Data;
 using Socialize.Api.Modules.Organizations.Data;
 using Socialize.Api.Modules.Organizations.Services;
 using Socialize.Api.Modules.Workspaces.Data;
+using Socialize.Api.Modules.Workspaces.Services;
 using Microsoft.AspNetCore.Identity;
-using Microsoft.Extensions.Options;
 
-namespace Socialize.Api.Infrastructure.Development;
+namespace Socialize.Api.Infrastructure.TestData;
 
-public static class DevelopmentSeedExtensions
+#pragma warning disable S1075 // Test data intentionally uses representative external URLs.
+
+internal static class TestDataSeedExtensions
 {
     private static readonly Guid OrganizationId = Guid.Parse("99999999-9999-9999-9999-999999999999");
     private static readonly Guid WorkspaceId = Guid.Parse("11111111-1111-1111-1111-111111111111");
+    private static readonly Guid AtlasWorkspaceId = Guid.Parse("11111111-1111-1111-1111-222222222222");
     private static readonly Guid ScopedClientId = Guid.Parse("22222222-2222-2222-2222-222222222222");
     private static readonly Guid HiddenClientId = Guid.Parse("22222222-2222-2222-2222-333333333333");
     private static readonly Guid ScopedCampaignId = Guid.Parse("33333333-3333-3333-3333-333333333333");
     private static readonly Guid HiddenCampaignId = Guid.Parse("33333333-3333-3333-3333-444444444444");
+    private static readonly Guid LumaInstagramChannelId = Guid.Parse("33333333-3333-3333-3333-000000000001");
+    private static readonly Guid LumaTikTokChannelId = Guid.Parse("33333333-3333-3333-3333-000000000002");
+    private static readonly Guid AtlasInstagramChannelId = Guid.Parse("33333333-3333-3333-3333-000000000003");
     private static readonly Guid ScopedContentItemId = Guid.Parse("44444444-4444-4444-4444-444444444444");
     private static readonly Guid HiddenContentItemId = Guid.Parse("44444444-4444-4444-4444-555555555555");
     private static readonly Guid ScopedAssetId = Guid.Parse("55555555-5555-5555-5555-555555555555");
@@ -34,23 +41,11 @@ public static class DevelopmentSeedExtensions
     private static readonly Guid ClientCommentId = Guid.Parse("77777777-7777-7777-7777-777777777777");
     private static readonly Guid NotificationId = Guid.Parse("88888888-8888-8888-8888-888888888888");
 
-    public static async Task<IApplicationBuilder> UseDevelopmentSeedAsync(
+    public static async Task<IServiceProvider> SeedTestDataAsync(
-        this IApplicationBuilder app,
+        this IServiceProvider services,
         CancellationToken cancellationToken = default)
     {
-        IHostEnvironment environment = app.ApplicationServices.GetRequiredService<IHostEnvironment>();
+        using IServiceScope scope = services.CreateScope();
-        if (!environment.IsDevelopment())
-        {
-            return app;
-        }
-
-        using IServiceScope scope = app.ApplicationServices.CreateScope();
-        IOptions<DevelopmentSeedOptions> options = scope.ServiceProvider.GetRequiredService<IOptions<DevelopmentSeedOptions>>();
-        if (!options.Value.Enabled)
-        {
-            return app;
-        }
-
         UserManager userManager = scope.ServiceProvider.GetRequiredService<UserManager>();
         AppDbContext dbContext = scope.ServiceProvider.GetRequiredService<AppDbContext>();
 
@@ -59,7 +54,7 @@ public static class DevelopmentSeedExtensions
             id: Guid.Parse("aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa"),
             username: "manager",
             email: "manager@socialize.local",
-            password: "manager",
+            password: "Manager1!",
             alias: "Northstar Manager",
             firstname: "Morgan",
             lastname: "Reid",
@@ -75,7 +70,7 @@ public static class DevelopmentSeedExtensions
             id: Guid.Parse("bbbbbbbb-bbbb-bbbb-bbbb-bbbbbbbbbbbb"),
             username: "client",
             email: "client@socialize.local",
-            password: "client",
+            password: "Client1!",
             alias: "Sofia Martin",
             firstname: "Sofia",
             lastname: "Martin",
@@ -92,7 +87,7 @@ public static class DevelopmentSeedExtensions
             id: Guid.Parse("cccccccc-cccc-cccc-cccc-cccccccccccc"),
             username: "provider",
             email: "provider@socialize.local",
-            password: "provider",
+            password: "Provider1!",
             alias: "Alex Studio",
             firstname: "Alex",
             lastname: "Studio",
@@ -110,7 +105,7 @@ public static class DevelopmentSeedExtensions
             id: Guid.Parse("dddddddd-dddd-dddd-dddd-dddddddddddd"),
             username: "dev",
             email: "dev@socialize.local",
-            password: "dev",
+            password: "Developer1!",
             alias: "Socialize Dev",
             firstname: "Jo",
             lastname: "Bumble",
@@ -133,7 +128,7 @@ public static class DevelopmentSeedExtensions
             dbContext,
             cancellationToken);
 
-        return app;
+        return services;
     }
 
     private static async Task<User> EnsureUserAsync(
@@ -170,7 +165,7 @@ public static class DevelopmentSeedExtensions
             if (!createResult.Succeeded)
             {
                 throw new InvalidOperationException(
-                    $"Failed to seed development user '{username}': {string.Join(", ", createResult.Errors.Select(error => error.Description))}");
+                    $"Failed to seed test user '{username}': {string.Join(", ", createResult.Errors.Select(error => error.Description))}");
             }
         }
 
@@ -190,7 +185,7 @@ public static class DevelopmentSeedExtensions
             if (!passwordResetResult.Succeeded)
             {
                 throw new InvalidOperationException(
-                    $"Failed to set development password for '{username}': {string.Join(", ", passwordResetResult.Errors.Select(error => error.Description))}");
+                    $"Failed to set test password for '{username}': {string.Join(", ", passwordResetResult.Errors.Select(error => error.Description))}");
             }
         }
 
@@ -217,13 +212,7 @@ public static class DevelopmentSeedExtensions
             await userManager.RemoveClaimAsync(user, claim);
         }
 
-        string persona = roles.Contains(KnownRoles.Manager, StringComparer.Ordinal)
+        string persona = GetPersona(roles);
-            ? KnownRoles.Manager
-            : roles.Contains(KnownRoles.Client, StringComparer.Ordinal)
-                ? KnownRoles.Client
-                : roles.Contains(KnownRoles.Provider, StringComparer.Ordinal)
-                    ? KnownRoles.Provider
-                    : KnownRoles.WorkspaceMember;
 
         foreach (Claim claim in claims.Concat([new Claim(KnownClaims.Persona, persona)]))
         {
@@ -233,6 +222,26 @@ public static class DevelopmentSeedExtensions
         return user;
     }
 
+    private static string GetPersona(IReadOnlyCollection<string> roles)
+    {
+        if (roles.Contains(KnownRoles.Manager, StringComparer.Ordinal))
+        {
+            return KnownRoles.Manager;
+        }
+
+        if (roles.Contains(KnownRoles.Client, StringComparer.Ordinal))
+        {
+            return KnownRoles.Client;
+        }
+
+        if (roles.Contains(KnownRoles.Provider, StringComparer.Ordinal))
+        {
+            return KnownRoles.Provider;
+        }
+
+        return KnownRoles.WorkspaceMember;
+    }
+
     private static async Task EnsureOrganizationDataAsync(
         Guid managerUserId,
         Guid developerUserId,
@@ -252,7 +261,12 @@ public static class DevelopmentSeedExtensions
             dbContext.Organizations.Add(organization);
         }
 
-        organization.Name = "Northstar Collective";
+        organization.Name = "Northstar Agency";
+        organization.IsGoogleDriveDamEnabled = true;
+        organization.GoogleDriveRootFolderId = "dev-socialize-dam-root";
+        organization.GoogleDriveRootFolderName = "Socialize DAM";
+        organization.GoogleDriveRootFolderUrl = "https://drive.google.com/drive/folders/dev-socialize-dam-root";
+        organization.MembershipTierId = OrganizationMembershipTierSeed.AgencyId;
         organization.OwnerUserId = managerUserId;
 
         await UpsertOrganizationMembershipAsync(
@@ -309,32 +323,31 @@ public static class DevelopmentSeedExtensions
         AppDbContext dbContext,
         CancellationToken cancellationToken)
     {
-        Workspace? workspace = await dbContext.Workspaces
+        await UpsertWorkspaceAsync(
-            .SingleOrDefaultAsync(candidate => candidate.Id == WorkspaceId, cancellationToken);
+            dbContext,
-        if (workspace is null)
+            WorkspaceId,
-        {
+            OrganizationId,
-            workspace = new Workspace
+            managerUserId,
-            {
+            "Luma Coffee",
-                Id = WorkspaceId,
+            "America/Montreal",
-                Name = string.Empty,
+            "/images/seed/luma-coffee-logo.svg",
-                TimeZone = string.Empty,
+            cancellationToken);
-                CreatedAt = DateTimeOffset.UtcNow,
+        await UpsertWorkspaceAsync(
-            };
+            dbContext,
-            dbContext.Workspaces.Add(workspace);
+            AtlasWorkspaceId,
-        }
+            OrganizationId,
-
+            managerUserId,
-        workspace.Name = "Northstar Studio";
+            "Atlas Bakery",
-        workspace.OrganizationId = OrganizationId;
+            "America/Montreal",
-        workspace.OwnerUserId = managerUserId;
+            "/images/seed/atlas-bakery-logo.svg",
-        workspace.TimeZone = "America/Montreal";
+            cancellationToken);
-        await dbContext.SaveChangesAsync(cancellationToken);
 
         await UpsertClientAsync(
             dbContext,
             ScopedClientId,
             "Luma Coffee",
             "Active",
-            "https://images.unsplash.com/photo-1511920170033-f8396924c348?auto=format&fit=crop&w=200&q=80",
+            "/images/seed/luma-coffee-logo.svg",
             "Sofia Martin",
             "client@socialize.local",
             WorkspaceId,
@@ -344,10 +357,10 @@ public static class DevelopmentSeedExtensions
             HiddenClientId,
             "Atlas Bakery",
             "Active",
-            "https://images.unsplash.com/photo-1509440159596-0249088772ff?auto=format&fit=crop&w=200&q=80",
+            "/images/seed/atlas-bakery-logo.svg",
             "Nina Cole",
             "nina@atlasbakery.test",
-            WorkspaceId,
+            AtlasWorkspaceId,
             cancellationToken);
 
         await UpsertCampaignAsync(
@@ -365,7 +378,7 @@ public static class DevelopmentSeedExtensions
         await UpsertCampaignAsync(
             dbContext,
             HiddenCampaignId,
-            WorkspaceId,
+            AtlasWorkspaceId,
             HiddenClientId,
             "Summer Retention",
             "Planned",
@@ -375,6 +388,34 @@ public static class DevelopmentSeedExtensions
             "Sequence email and paid social updates together.",
             cancellationToken);
 
+        await UpsertChannelAsync(
+            dbContext,
+            LumaInstagramChannelId,
+            WorkspaceId,
+            "Luma Coffee Instagram",
+            "Instagram",
+            "@lumacoffee",
+            null,
+            cancellationToken);
+        await UpsertChannelAsync(
+            dbContext,
+            LumaTikTokChannelId,
+            WorkspaceId,
+            "Luma Coffee TikTok",
+            "TikTok",
+            "@lumacoffee",
+            null,
+            cancellationToken);
+        await UpsertChannelAsync(
+            dbContext,
+            AtlasInstagramChannelId,
+            AtlasWorkspaceId,
+            "Atlas Bakery Instagram",
+            "Instagram",
+            "@atlasbakery",
+            null,
+            cancellationToken);
+
         await UpsertContentItemAsync(
             dbContext,
             ScopedContentItemId,
@@ -383,7 +424,7 @@ public static class DevelopmentSeedExtensions
             ScopedCampaignId,
             "Spring launch hero video",
             "Fresh seasonal menu launch across Instagram and TikTok.",
-            "Instagram Reel, TikTok",
+            "Luma Coffee Instagram, Luma Coffee TikTok",
             "In approval",
             DateTimeOffset.UtcNow.AddDays(3),
             "v3",
@@ -392,22 +433,22 @@ public static class DevelopmentSeedExtensions
         await UpsertContentItemAsync(
             dbContext,
             HiddenContentItemId,
-            WorkspaceId,
+            AtlasWorkspaceId,
             HiddenClientId,
             HiddenCampaignId,
             "Bakery loyalty carousel",
             "Reward regular customers with a four-card retention carousel.",
-            "Instagram Carousel",
+            "Atlas Bakery Instagram",
             "Draft",
             DateTimeOffset.UtcNow.AddDays(10),
             "v1",
             1,
             cancellationToken);
 
-        await EnsureRevisionAsync(dbContext, Guid.Parse("44444444-4444-4444-4444-000000000001"), ScopedContentItemId, 1, "v1", "Spring launch hero video", "Initial draft for the seasonal menu launch.", "Instagram Reel, TikTok", "Initial concept draft.", providerUserId, DateTimeOffset.UtcNow.AddDays(-5), cancellationToken);
+        await EnsureRevisionAsync(dbContext, Guid.Parse("44444444-4444-4444-4444-000000000001"), ScopedContentItemId, 1, "v1", "Spring launch hero video", "Initial draft for the seasonal menu launch.", "Luma Coffee Instagram, Luma Coffee TikTok", "Initial concept draft.", providerUserId, DateTimeOffset.UtcNow.AddDays(-5), cancellationToken);
-        await EnsureRevisionAsync(dbContext, Guid.Parse("44444444-4444-4444-4444-000000000002"), ScopedContentItemId, 2, "v2", "Spring launch hero video", "Updated hook and transitions after internal review.", "Instagram Reel, TikTok", "Addressed internal pacing feedback.", providerUserId, DateTimeOffset.UtcNow.AddDays(-3), cancellationToken);
+        await EnsureRevisionAsync(dbContext, Guid.Parse("44444444-4444-4444-4444-000000000002"), ScopedContentItemId, 2, "v2", "Spring launch hero video", "Updated hook and transitions after internal review.", "Luma Coffee Instagram, Luma Coffee TikTok", "Addressed internal pacing feedback.", providerUserId, DateTimeOffset.UtcNow.AddDays(-3), cancellationToken);
-        await EnsureRevisionAsync(dbContext, Guid.Parse("44444444-4444-4444-4444-000000000003"), ScopedContentItemId, 3, "v3", "Spring launch hero video", "Fresh seasonal menu launch across Instagram and TikTok.", "Instagram Reel, TikTok", "Client-facing draft after copy cleanup.", providerUserId, DateTimeOffset.UtcNow.AddDays(-1), cancellationToken);
+        await EnsureRevisionAsync(dbContext, Guid.Parse("44444444-4444-4444-4444-000000000003"), ScopedContentItemId, 3, "v3", "Spring launch hero video", "Fresh seasonal menu launch across Instagram and TikTok.", "Luma Coffee Instagram, Luma Coffee TikTok", "Client-facing draft after copy cleanup.", providerUserId, DateTimeOffset.UtcNow.AddDays(-1), cancellationToken);
-        await EnsureRevisionAsync(dbContext, Guid.Parse("44444444-4444-4444-4444-000000000004"), HiddenContentItemId, 1, "v1", "Bakery loyalty carousel", "Reward regular customers with a four-card retention carousel.", "Instagram Carousel", "First draft.", managerUserId, DateTimeOffset.UtcNow.AddDays(-2), cancellationToken);
+        await EnsureRevisionAsync(dbContext, Guid.Parse("44444444-4444-4444-4444-000000000004"), HiddenContentItemId, 1, "v1", "Bakery loyalty carousel", "Reward regular customers with a four-card retention carousel.", "Atlas Bakery Instagram", "First draft.", managerUserId, DateTimeOffset.UtcNow.AddDays(-2), cancellationToken);
 
         Asset? asset = await dbContext.Assets.SingleOrDefaultAsync(candidate => candidate.Id == ScopedAssetId, cancellationToken);
         if (asset is null)
@@ -429,6 +470,7 @@ public static class DevelopmentSeedExtensions
         asset.DisplayName = "Spring launch cut";
         asset.GoogleDriveFileId = "dev-socialize-demo";
         asset.GoogleDriveLink = "https://drive.google.com/file/d/dev-socialize-demo/view";
+        asset.GoogleDriveWorkspaceFolderPath = "Socialize DAM/luma-coffee";
         asset.PreviewUrl = "https://drive.google.com/thumbnail?id=dev-socialize-demo";
         asset.CurrentRevisionNumber = 2;
         await dbContext.SaveChangesAsync(cancellationToken);
@@ -455,8 +497,6 @@ public static class DevelopmentSeedExtensions
         comment.AuthorDisplayName = "Sofia Martin";
         comment.AuthorEmail = "client@socialize.local";
         comment.Body = "Please tighten the opening three seconds and make the launch CTA more explicit.";
-        comment.IsResolved = false;
-        comment.ResolvedAt = null;
         await dbContext.SaveChangesAsync(cancellationToken);
 
         ApprovalRequest? approvalRequest = await dbContext.ApprovalRequests.SingleOrDefaultAsync(candidate => candidate.Id == ScopedApprovalRequestId, cancellationToken);
@@ -535,6 +575,45 @@ public static class DevelopmentSeedExtensions
         await dbContext.SaveChangesAsync(cancellationToken);
     }
 
+    private static async Task UpsertWorkspaceAsync(
+        AppDbContext dbContext,
+        Guid id,
+        Guid organizationId,
+        Guid ownerUserId,
+        string name,
+        string timeZone,
+        string logoUrl,
+        CancellationToken cancellationToken)
+    {
+        Workspace? workspace = await dbContext.Workspaces
+            .SingleOrDefaultAsync(candidate => candidate.Id == id, cancellationToken);
+        if (workspace is null)
+        {
+            workspace = new Workspace
+            {
+                Id = id,
+                Name = string.Empty,
+                Slug = string.Empty,
+                TimeZone = string.Empty,
+                CreatedAt = DateTimeOffset.UtcNow,
+            };
+            dbContext.Workspaces.Add(workspace);
+        }
+
+        workspace.Name = name;
+        workspace.Slug = await WorkspaceSlugGenerator.CreateUniqueAsync(
+            dbContext,
+            organizationId,
+            string.IsNullOrWhiteSpace(workspace.Slug) ? name : workspace.Slug,
+            workspace.Id,
+            cancellationToken);
+        workspace.OrganizationId = organizationId;
+        workspace.OwnerUserId = ownerUserId;
+        workspace.TimeZone = timeZone;
+        workspace.LogoUrl = logoUrl;
+        await dbContext.SaveChangesAsync(cancellationToken);
+    }
+
     private static async Task UpsertClientAsync(
         AppDbContext dbContext,
         Guid id,
@@ -604,6 +683,37 @@ public static class DevelopmentSeedExtensions
         await dbContext.SaveChangesAsync(cancellationToken);
     }
 
+    private static async Task UpsertChannelAsync(
+        AppDbContext dbContext,
+        Guid id,
+        Guid workspaceId,
+        string name,
+        string network,
+        string? handle,
+        string? externalUrl,
+        CancellationToken cancellationToken)
+    {
+        Channel? channel = await dbContext.Channels.SingleOrDefaultAsync(candidate => candidate.Id == id, cancellationToken);
+        if (channel is null)
+        {
+            channel = new Channel
+            {
+                Id = id,
+                Name = string.Empty,
+                Network = string.Empty,
+                CreatedAt = DateTimeOffset.UtcNow,
+            };
+            dbContext.Channels.Add(channel);
+        }
+
+        channel.WorkspaceId = workspaceId;
+        channel.Name = name;
+        channel.Network = network;
+        channel.Handle = handle;
+        channel.ExternalUrl = externalUrl;
+        await dbContext.SaveChangesAsync(cancellationToken);
+    }
+
     private static async Task UpsertContentItemAsync(
         AppDbContext dbContext,
         Guid id,

backend/src/Socialize.Api/Infrastructure/YouTube/YouTubeUrlHelper.cs

@@ -2,7 +2,7 @@ using System.Text.RegularExpressions;
 
 namespace Socialize.Api.Infrastructure.YouTube;
 
-public static class YouTubeUrlHelper
+internal static class YouTubeUrlHelper
 {
     private static readonly Regex VideoIdRegex = new(
         @"(?:youtube\.com/(?:[^/]+/.+/|(?:v|e(?:mbed)?)/|.*[?&]v=)|youtu\.be/)([^""&?/\s]{11})",

backend/src/Socialize.Api/Migrations/20260507143849_Initial.Designer.cs

@@ -12,7 +12,7 @@ using Socialize.Api.Data;
 namespace Socialize.Api.Migrations
 {
     [DbContext(typeof(AppDbContext))]
-    [Migration("20260505013232_Initial")]
+    [Migration("20260507143849_Initial")]
     partial class Initial
     {
         /// <inheritdoc />
@@ -441,6 +441,326 @@ namespace Socialize.Api.Migrations
                     b.ToTable("AssetRevisions", (string)null);
                 });
 
+            modelBuilder.Entity("Socialize.Api.Modules.CalendarIntegrations.Data.CalendarCatalogEntry", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("uuid");
+
+                    b.Property<string>("Category")
+                        .IsRequired()
+                        .HasMaxLength(64)
+                        .HasColumnType("character varying(64)");
+
+                    b.Property<string>("Country")
+                        .HasMaxLength(2)
+                        .HasColumnType("character varying(2)");
+
+                    b.Property<DateTimeOffset>("CreatedAt")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("timestamp with time zone")
+                        .HasDefaultValueSql("CURRENT_TIMESTAMP");
+
+                    b.Property<string>("CultureOrReligion")
+                        .HasMaxLength(128)
+                        .HasColumnType("character varying(128)");
+
+                    b.Property<string>("DefaultColor")
+                        .IsRequired()
+                        .HasMaxLength(16)
+                        .HasColumnType("character varying(16)");
+
+                    b.Property<string>("Description")
+                        .IsRequired()
+                        .HasMaxLength(1024)
+                        .HasColumnType("character varying(1024)");
+
+                    b.Property<string>("Language")
+                        .IsRequired()
+                        .HasMaxLength(16)
+                        .HasColumnType("character varying(16)");
+
+                    b.Property<string>("ProviderName")
+                        .IsRequired()
+                        .HasMaxLength(128)
+                        .HasColumnType("character varying(128)");
+
+                    b.Property<string>("Region")
+                        .HasMaxLength(128)
+                        .HasColumnType("character varying(128)");
+
+                    b.Property<string>("SourceUrl")
+                        .IsRequired()
+                        .HasMaxLength(2048)
+                        .HasColumnType("character varying(2048)");
+
+                    b.Property<string>("Title")
+                        .IsRequired()
+                        .HasMaxLength(256)
+                        .HasColumnType("character varying(256)");
+
+                    b.Property<string>("TrustLevel")
+                        .IsRequired()
+                        .HasMaxLength(64)
+                        .HasColumnType("character varying(64)");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("Category");
+
+                    b.HasIndex("Country");
+
+                    b.HasIndex("ProviderName");
+
+                    b.ToTable("CalendarCatalogEntries", (string)null);
+
+                    b.HasData(
+                        new
+                        {
+                            Id = new Guid("10000000-0000-0000-0000-000000000001"),
+                            Category = "public-holiday",
+                            Country = "US",
+                            CreatedAt = new DateTimeOffset(new DateTime(1, 1, 1, 0, 0, 0, 0, DateTimeKind.Unspecified), new TimeSpan(0, 0, 0, 0, 0)),
+                            DefaultColor = "#2F80ED",
+                            Description = "Federal public holiday calendar for the United States.",
+                            Language = "en",
+                            ProviderName = "Nager.Date",
+                            SourceUrl = "https://date.nager.at/api/v3/PublicHolidays/2026/US",
+                            Title = "United States Public Holidays",
+                            TrustLevel = "Verified"
+                        },
+                        new
+                        {
+                            Id = new Guid("10000000-0000-0000-0000-000000000002"),
+                            Category = "public-holiday",
+                            Country = "CA",
+                            CreatedAt = new DateTimeOffset(new DateTime(1, 1, 1, 0, 0, 0, 0, DateTimeKind.Unspecified), new TimeSpan(0, 0, 0, 0, 0)),
+                            DefaultColor = "#2F80ED",
+                            Description = "Public holiday calendar for Canada.",
+                            Language = "en",
+                            ProviderName = "Nager.Date",
+                            SourceUrl = "https://date.nager.at/api/v3/PublicHolidays/2026/CA",
+                            Title = "Canada Public Holidays",
+                            TrustLevel = "Verified"
+                        },
+                        new
+                        {
+                            Id = new Guid("10000000-0000-0000-0000-000000000003"),
+                            Category = "marketing-moment",
+                            CreatedAt = new DateTimeOffset(new DateTime(1, 1, 1, 0, 0, 0, 0, DateTimeKind.Unspecified), new TimeSpan(0, 0, 0, 0, 0)),
+                            DefaultColor = "#9B51E0",
+                            Description = "Common retail, awareness, and social planning moments.",
+                            Language = "en",
+                            ProviderName = "Socialize",
+                            SourceUrl = "https://example.com/socialize/marketing-moments.ics",
+                            Title = "Common Marketing Moments",
+                            TrustLevel = "Maintained"
+                        });
+                });
+
+            modelBuilder.Entity("Socialize.Api.Modules.CalendarIntegrations.Data.CalendarEvent", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("uuid");
+
+                    b.Property<Guid>("CalendarSourceId")
+                        .HasColumnType("uuid");
+
+                    b.Property<string>("Description")
+                        .HasMaxLength(4000)
+                        .HasColumnType("character varying(4000)");
+
+                    b.Property<DateOnly>("EndDate")
+                        .HasColumnType("date");
+
+                    b.Property<DateTime?>("EndLocalDateTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<DateTimeOffset?>("EndUtc")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<DateTimeOffset>("ImportedAt")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<bool>("IsAllDay")
+                        .HasColumnType("boolean");
+
+                    b.Property<bool>("IsFloatingTime")
+                        .HasColumnType("boolean");
+
+                    b.Property<string>("Location")
+                        .HasMaxLength(512)
+                        .HasColumnType("character varying(512)");
+
+                    b.Property<string>("RecurrenceId")
+                        .HasMaxLength(512)
+                        .HasColumnType("character varying(512)");
+
+                    b.Property<string>("SourceEventUid")
+                        .IsRequired()
+                        .HasMaxLength(512)
+                        .HasColumnType("character varying(512)");
+
+                    b.Property<DateTimeOffset?>("SourceLastModifiedAt")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<string>("SourceUrl")
+                        .HasMaxLength(2048)
+                        .HasColumnType("character varying(2048)");
+
+                    b.Property<DateOnly>("StartDate")
+                        .HasColumnType("date");
+
+                    b.Property<DateTime?>("StartLocalDateTime")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<DateTimeOffset?>("StartUtc")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<string>("TimeZoneId")
+                        .HasMaxLength(128)
+                        .HasColumnType("character varying(128)");
+
+                    b.Property<string>("Title")
+                        .IsRequired()
+                        .HasMaxLength(512)
+                        .HasColumnType("character varying(512)");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("CalendarSourceId");
+
+                    b.HasIndex("CalendarSourceId", "SourceEventUid", "StartDate")
+                        .IsUnique();
+
+                    b.ToTable("CalendarEvents", (string)null);
+                });
+
+            modelBuilder.Entity("Socialize.Api.Modules.CalendarIntegrations.Data.CalendarSource", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("uuid");
+
+                    b.Property<string>("CatalogSourceReference")
+                        .HasMaxLength(256)
+                        .HasColumnType("character varying(256)");
+
+                    b.Property<string>("Category")
+                        .IsRequired()
+                        .HasMaxLength(64)
+                        .HasColumnType("character varying(64)");
+
+                    b.Property<string>("Color")
+                        .IsRequired()
+                        .HasMaxLength(16)
+                        .HasColumnType("character varying(16)");
+
+                    b.Property<DateTimeOffset>("CreatedAt")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("timestamp with time zone")
+                        .HasDefaultValueSql("CURRENT_TIMESTAMP");
+
+                    b.Property<string>("DisplayTitle")
+                        .IsRequired()
+                        .HasMaxLength(256)
+                        .HasColumnType("character varying(256)");
+
+                    b.Property<string>("InheritanceMode")
+                        .HasMaxLength(32)
+                        .HasColumnType("character varying(32)");
+
+                    b.Property<bool>("IsEnabled")
+                        .HasColumnType("boolean");
+
+                    b.Property<DateTimeOffset?>("LastAttemptedSyncAt")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<DateTimeOffset?>("LastSuccessfulSyncAt")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<string>("LastSyncError")
+                        .HasMaxLength(2048)
+                        .HasColumnType("character varying(2048)");
+
+                    b.Property<Guid?>("OrganizationId")
+                        .HasColumnType("uuid");
+
+                    b.Property<string>("Scope")
+                        .IsRequired()
+                        .HasMaxLength(32)
+                        .HasColumnType("character varying(32)");
+
+                    b.Property<string>("SourceUrl")
+                        .HasMaxLength(2048)
+                        .HasColumnType("character varying(2048)");
+
+                    b.Property<DateTimeOffset>("UpdatedAt")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("timestamp with time zone")
+                        .HasDefaultValueSql("CURRENT_TIMESTAMP");
+
+                    b.Property<Guid?>("UserId")
+                        .HasColumnType("uuid");
+
+                    b.Property<Guid?>("WorkspaceId")
+                        .HasColumnType("uuid");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("OrganizationId");
+
+                    b.HasIndex("Scope");
+
+                    b.HasIndex("UserId");
+
+                    b.HasIndex("WorkspaceId");
+
+                    b.ToTable("CalendarSources", (string)null);
+                });
+
+            modelBuilder.Entity("Socialize.Api.Modules.CalendarIntegrations.Data.UserCalendarExportFeed", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("uuid");
+
+                    b.Property<DateTimeOffset>("CreatedAt")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("timestamp with time zone")
+                        .HasDefaultValueSql("CURRENT_TIMESTAMP");
+
+                    b.Property<DateTimeOffset?>("RevokedAt")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<string>("Token")
+                        .HasMaxLength(96)
+                        .HasColumnType("character varying(96)");
+
+                    b.Property<string>("TokenHash")
+                        .HasMaxLength(64)
+                        .HasColumnType("character varying(64)");
+
+                    b.Property<DateTimeOffset>("UpdatedAt")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("timestamp with time zone")
+                        .HasDefaultValueSql("CURRENT_TIMESTAMP");
+
+                    b.Property<Guid>("UserId")
+                        .HasColumnType("uuid");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("TokenHash")
+                        .IsUnique();
+
+                    b.HasIndex("UserId")
+                        .IsUnique();
+
+                    b.ToTable("UserCalendarExportFeeds", (string)null);
+                });
+
             modelBuilder.Entity("Socialize.Api.Modules.Campaigns.Data.Campaign", b =>
                 {
                     b.Property<Guid>("Id")
@@ -494,6 +814,48 @@ namespace Socialize.Api.Migrations
                     b.ToTable("Campaigns", (string)null);
                 });
 
+            modelBuilder.Entity("Socialize.Api.Modules.Channels.Data.Channel", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("uuid");
+
+                    b.Property<DateTimeOffset>("CreatedAt")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("timestamp with time zone")
+                        .HasDefaultValueSql("CURRENT_TIMESTAMP");
+
+                    b.Property<string>("ExternalUrl")
+                        .HasMaxLength(2048)
+                        .HasColumnType("character varying(2048)");
+
+                    b.Property<string>("Handle")
+                        .HasMaxLength(256)
+                        .HasColumnType("character varying(256)");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasMaxLength(256)
+                        .HasColumnType("character varying(256)");
+
+                    b.Property<string>("Network")
+                        .IsRequired()
+                        .HasMaxLength(64)
+                        .HasColumnType("character varying(64)");
+
+                    b.Property<Guid>("WorkspaceId")
+                        .HasColumnType("uuid");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("WorkspaceId");
+
+                    b.HasIndex("WorkspaceId", "Network", "Name")
+                        .IsUnique();
+
+                    b.ToTable("Channels", (string)null);
+                });
+
             modelBuilder.Entity("Socialize.Api.Modules.Clients.Data.Client", b =>
                 {
                     b.Property<Guid>("Id")
@@ -550,6 +912,29 @@ namespace Socialize.Api.Migrations
                         .ValueGeneratedOnAdd()
                         .HasColumnType("uuid");
 
+                    b.Property<string>("AttachmentBlobContainerName")
+                        .HasMaxLength(128)
+                        .HasColumnType("character varying(128)");
+
+                    b.Property<string>("AttachmentBlobName")
+                        .HasMaxLength(512)
+                        .HasColumnType("character varying(512)");
+
+                    b.Property<string>("AttachmentBlobUrl")
+                        .HasMaxLength(1024)
+                        .HasColumnType("character varying(1024)");
+
+                    b.Property<string>("AttachmentContentType")
+                        .HasMaxLength(128)
+                        .HasColumnType("character varying(128)");
+
+                    b.Property<string>("AttachmentFileName")
+                        .HasMaxLength(256)
+                        .HasColumnType("character varying(256)");
+
+                    b.Property<long?>("AttachmentSizeBytes")
+                        .HasColumnType("bigint");
+
                     b.Property<string>("AuthorDisplayName")
                         .IsRequired()
                         .HasMaxLength(256)
@@ -576,15 +961,9 @@ namespace Socialize.Api.Migrations
                         .HasColumnType("timestamp with time zone")
                         .HasDefaultValueSql("CURRENT_TIMESTAMP");
 
-                    b.Property<bool>("IsResolved")
-                        .HasColumnType("boolean");
-
                     b.Property<Guid?>("ParentCommentId")
                         .HasColumnType("uuid");
 
-                    b.Property<DateTimeOffset?>("ResolvedAt")
-                        .HasColumnType("timestamp with time zone");
-
                     b.Property<Guid>("WorkspaceId")
                         .HasColumnType("uuid");
 
@@ -665,6 +1044,62 @@ namespace Socialize.Api.Migrations
                     b.ToTable("ContentItems", (string)null);
                 });
 
+            modelBuilder.Entity("Socialize.Api.Modules.ContentItems.Data.ContentItemActivityEntry", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("uuid");
+
+                    b.Property<string>("ActorEmail")
+                        .HasMaxLength(256)
+                        .HasColumnType("character varying(256)");
+
+                    b.Property<Guid?>("ActorUserId")
+                        .HasColumnType("uuid");
+
+                    b.Property<Guid>("ContentItemId")
+                        .HasColumnType("uuid");
+
+                    b.Property<DateTimeOffset>("CreatedAt")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("timestamp with time zone")
+                        .HasDefaultValueSql("CURRENT_TIMESTAMP");
+
+                    b.Property<Guid>("EntityId")
+                        .HasColumnType("uuid");
+
+                    b.Property<string>("EntityType")
+                        .IsRequired()
+                        .HasMaxLength(128)
+                        .HasColumnType("character varying(128)");
+
+                    b.Property<string>("EventType")
+                        .IsRequired()
+                        .HasMaxLength(128)
+                        .HasColumnType("character varying(128)");
+
+                    b.Property<string>("MetadataJson")
+                        .HasColumnType("jsonb");
+
+                    b.Property<string>("Summary")
+                        .IsRequired()
+                        .HasMaxLength(1024)
+                        .HasColumnType("character varying(1024)");
+
+                    b.Property<Guid>("WorkspaceId")
+                        .HasColumnType("uuid");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("ContentItemId");
+
+                    b.HasIndex("WorkspaceId");
+
+                    b.HasIndex("ContentItemId", "CreatedAt");
+
+                    b.ToTable("ContentItemActivityEntries", (string)null);
+                });
+
             modelBuilder.Entity("Socialize.Api.Modules.ContentItems.Data.ContentItemRevision", b =>
                 {
                     b.Property<Guid>("Id")
@@ -1217,6 +1652,10 @@ namespace Socialize.Api.Migrations
                         .HasColumnType("timestamp with time zone")
                         .HasDefaultValueSql("CURRENT_TIMESTAMP");
 
+                    b.Property<string>("LogoUrl")
+                        .HasMaxLength(2048)
+                        .HasColumnType("character varying(2048)");
+
                     b.Property<string>("Name")
                         .IsRequired()
                         .HasMaxLength(256)
@@ -1420,6 +1859,15 @@ namespace Socialize.Api.Migrations
                         .IsRequired();
                 });
 
+            modelBuilder.Entity("Socialize.Api.Modules.CalendarIntegrations.Data.CalendarEvent", b =>
+                {
+                    b.HasOne("Socialize.Api.Modules.CalendarIntegrations.Data.CalendarSource", null)
+                        .WithMany()
+                        .HasForeignKey("CalendarSourceId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+                });
+
             modelBuilder.Entity("Socialize.Api.Modules.Feedback.Data.FeedbackActivityEntry", b =>
                 {
                     b.HasOne("Socialize.Api.Modules.Feedback.Data.FeedbackReport", "FeedbackReport")

backend/src/Socialize.Api/Migrations/20260507143849_Initial.cs

@@ -4,10 +4,13 @@ using Npgsql.EntityFrameworkCore.PostgreSQL.Metadata;
 
 #nullable disable
 
+#pragma warning disable CA1814 // Prefer jagged arrays over multidimensional
+#pragma warning disable CA1861 // Generated migration seed arrays are not runtime hot paths.
+
 namespace Socialize.Api.Migrations
 {
     /// <inheritdoc />
-    public partial class Initial : Migration
+    internal partial class Initial : Migration
     {
         /// <inheritdoc />
         protected override void Up(MigrationBuilder migrationBuilder)
@@ -162,6 +165,56 @@ namespace Socialize.Api.Migrations
                     table.PrimaryKey("PK_Assets", x => x.Id);
                 });
 
+            migrationBuilder.CreateTable(
+                name: "CalendarCatalogEntries",
+                columns: table => new
+                {
+                    Id = table.Column<Guid>(type: "uuid", nullable: false),
+                    Title = table.Column<string>(type: "character varying(256)", maxLength: 256, nullable: false),
+                    Description = table.Column<string>(type: "character varying(1024)", maxLength: 1024, nullable: false),
+                    Country = table.Column<string>(type: "character varying(2)", maxLength: 2, nullable: true),
+                    Region = table.Column<string>(type: "character varying(128)", maxLength: 128, nullable: true),
+                    Language = table.Column<string>(type: "character varying(16)", maxLength: 16, nullable: false),
+                    Category = table.Column<string>(type: "character varying(64)", maxLength: 64, nullable: false),
+                    CultureOrReligion = table.Column<string>(type: "character varying(128)", maxLength: 128, nullable: true),
+                    ProviderName = table.Column<string>(type: "character varying(128)", maxLength: 128, nullable: false),
+                    SourceUrl = table.Column<string>(type: "character varying(2048)", maxLength: 2048, nullable: false),
+                    TrustLevel = table.Column<string>(type: "character varying(64)", maxLength: 64, nullable: false),
+                    DefaultColor = table.Column<string>(type: "character varying(16)", maxLength: 16, nullable: false),
+                    CreatedAt = table.Column<DateTimeOffset>(type: "timestamp with time zone", nullable: false, defaultValueSql: "CURRENT_TIMESTAMP")
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_CalendarCatalogEntries", x => x.Id);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "CalendarSources",
+                columns: table => new
+                {
+                    Id = table.Column<Guid>(type: "uuid", nullable: false),
+                    Scope = table.Column<string>(type: "character varying(32)", maxLength: 32, nullable: false),
+                    OrganizationId = table.Column<Guid>(type: "uuid", nullable: true),
+                    WorkspaceId = table.Column<Guid>(type: "uuid", nullable: true),
+                    UserId = table.Column<Guid>(type: "uuid", nullable: true),
+                    SourceUrl = table.Column<string>(type: "character varying(2048)", maxLength: 2048, nullable: true),
+                    CatalogSourceReference = table.Column<string>(type: "character varying(256)", maxLength: 256, nullable: true),
+                    DisplayTitle = table.Column<string>(type: "character varying(256)", maxLength: 256, nullable: false),
+                    Color = table.Column<string>(type: "character varying(16)", maxLength: 16, nullable: false),
+                    Category = table.Column<string>(type: "character varying(64)", maxLength: 64, nullable: false),
+                    IsEnabled = table.Column<bool>(type: "boolean", nullable: false),
+                    InheritanceMode = table.Column<string>(type: "character varying(32)", maxLength: 32, nullable: true),
+                    LastSuccessfulSyncAt = table.Column<DateTimeOffset>(type: "timestamp with time zone", nullable: true),
+                    LastAttemptedSyncAt = table.Column<DateTimeOffset>(type: "timestamp with time zone", nullable: true),
+                    LastSyncError = table.Column<string>(type: "character varying(2048)", maxLength: 2048, nullable: true),
+                    CreatedAt = table.Column<DateTimeOffset>(type: "timestamp with time zone", nullable: false, defaultValueSql: "CURRENT_TIMESTAMP"),
+                    UpdatedAt = table.Column<DateTimeOffset>(type: "timestamp with time zone", nullable: false, defaultValueSql: "CURRENT_TIMESTAMP")
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_CalendarSources", x => x.Id);
+                });
+
             migrationBuilder.CreateTable(
                 name: "Campaigns",
                 columns: table => new
@@ -182,6 +235,23 @@ namespace Socialize.Api.Migrations
                     table.PrimaryKey("PK_Campaigns", x => x.Id);
                 });
 
+            migrationBuilder.CreateTable(
+                name: "Channels",
+                columns: table => new
+                {
+                    Id = table.Column<Guid>(type: "uuid", nullable: false),
+                    WorkspaceId = table.Column<Guid>(type: "uuid", nullable: false),
+                    Name = table.Column<string>(type: "character varying(256)", maxLength: 256, nullable: false),
+                    Network = table.Column<string>(type: "character varying(64)", maxLength: 64, nullable: false),
+                    Handle = table.Column<string>(type: "character varying(256)", maxLength: 256, nullable: true),
+                    ExternalUrl = table.Column<string>(type: "character varying(2048)", maxLength: 2048, nullable: true),
+                    CreatedAt = table.Column<DateTimeOffset>(type: "timestamp with time zone", nullable: false, defaultValueSql: "CURRENT_TIMESTAMP")
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Channels", x => x.Id);
+                });
+
             migrationBuilder.CreateTable(
                 name: "Clients",
                 columns: table => new
@@ -213,15 +283,40 @@ namespace Socialize.Api.Migrations
                     AuthorDisplayName = table.Column<string>(type: "character varying(256)", maxLength: 256, nullable: false),
                     AuthorEmail = table.Column<string>(type: "character varying(256)", maxLength: 256, nullable: false),
                     Body = table.Column<string>(type: "character varying(4000)", maxLength: 4000, nullable: false),
-                    IsResolved = table.Column<bool>(type: "boolean", nullable: false),
+                    AttachmentFileName = table.Column<string>(type: "character varying(256)", maxLength: 256, nullable: true),
-                    CreatedAt = table.Column<DateTimeOffset>(type: "timestamp with time zone", nullable: false, defaultValueSql: "CURRENT_TIMESTAMP"),
+                    AttachmentContentType = table.Column<string>(type: "character varying(128)", maxLength: 128, nullable: true),
-                    ResolvedAt = table.Column<DateTimeOffset>(type: "timestamp with time zone", nullable: true)
+                    AttachmentSizeBytes = table.Column<long>(type: "bigint", nullable: true),
+                    AttachmentBlobContainerName = table.Column<string>(type: "character varying(128)", maxLength: 128, nullable: true),
+                    AttachmentBlobName = table.Column<string>(type: "character varying(512)", maxLength: 512, nullable: true),
+                    AttachmentBlobUrl = table.Column<string>(type: "character varying(1024)", maxLength: 1024, nullable: true),
+                    CreatedAt = table.Column<DateTimeOffset>(type: "timestamp with time zone", nullable: false, defaultValueSql: "CURRENT_TIMESTAMP")
                 },
                 constraints: table =>
                 {
                     table.PrimaryKey("PK_Comments", x => x.Id);
                 });
 
+            migrationBuilder.CreateTable(
+                name: "ContentItemActivityEntries",
+                columns: table => new
+                {
+                    Id = table.Column<Guid>(type: "uuid", nullable: false),
+                    WorkspaceId = table.Column<Guid>(type: "uuid", nullable: false),
+                    ContentItemId = table.Column<Guid>(type: "uuid", nullable: false),
+                    EventType = table.Column<string>(type: "character varying(128)", maxLength: 128, nullable: false),
+                    EntityType = table.Column<string>(type: "character varying(128)", maxLength: 128, nullable: false),
+                    EntityId = table.Column<Guid>(type: "uuid", nullable: false),
+                    Summary = table.Column<string>(type: "character varying(1024)", maxLength: 1024, nullable: false),
+                    ActorUserId = table.Column<Guid>(type: "uuid", nullable: true),
+                    ActorEmail = table.Column<string>(type: "character varying(256)", maxLength: 256, nullable: true),
+                    MetadataJson = table.Column<string>(type: "jsonb", nullable: true),
+                    CreatedAt = table.Column<DateTimeOffset>(type: "timestamp with time zone", nullable: false, defaultValueSql: "CURRENT_TIMESTAMP")
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_ContentItemActivityEntries", x => x.Id);
+                });
+
             migrationBuilder.CreateTable(
                 name: "ContentItemRevisions",
                 columns: table => new
@@ -329,6 +424,7 @@ namespace Socialize.Api.Migrations
                 {
                     Id = table.Column<Guid>(type: "uuid", nullable: false),
                     Name = table.Column<string>(type: "character varying(256)", maxLength: 256, nullable: false),
+                    LogoUrl = table.Column<string>(type: "character varying(2048)", maxLength: 2048, nullable: true),
                     OwnerUserId = table.Column<Guid>(type: "uuid", nullable: false),
                     CreatedAt = table.Column<DateTimeOffset>(type: "timestamp with time zone", nullable: false, defaultValueSql: "CURRENT_TIMESTAMP")
                 },
@@ -337,6 +433,23 @@ namespace Socialize.Api.Migrations
                     table.PrimaryKey("PK_Organizations", x => x.Id);
                 });
 
+            migrationBuilder.CreateTable(
+                name: "UserCalendarExportFeeds",
+                columns: table => new
+                {
+                    Id = table.Column<Guid>(type: "uuid", nullable: false),
+                    UserId = table.Column<Guid>(type: "uuid", nullable: false),
+                    Token = table.Column<string>(type: "character varying(96)", maxLength: 96, nullable: true),
+                    TokenHash = table.Column<string>(type: "character varying(64)", maxLength: 64, nullable: true),
+                    CreatedAt = table.Column<DateTimeOffset>(type: "timestamp with time zone", nullable: false, defaultValueSql: "CURRENT_TIMESTAMP"),
+                    UpdatedAt = table.Column<DateTimeOffset>(type: "timestamp with time zone", nullable: false, defaultValueSql: "CURRENT_TIMESTAMP"),
+                    RevokedAt = table.Column<DateTimeOffset>(type: "timestamp with time zone", nullable: true)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_UserCalendarExportFeeds", x => x.Id);
+                });
+
             migrationBuilder.CreateTable(
                 name: "WorkspaceApprovalStepConfigurations",
                 columns: table => new
@@ -478,6 +591,41 @@ namespace Socialize.Api.Migrations
                         onDelete: ReferentialAction.Cascade);
                 });
 
+            migrationBuilder.CreateTable(
+                name: "CalendarEvents",
+                columns: table => new
+                {
+                    Id = table.Column<Guid>(type: "uuid", nullable: false),
+                    CalendarSourceId = table.Column<Guid>(type: "uuid", nullable: false),
+                    SourceEventUid = table.Column<string>(type: "character varying(512)", maxLength: 512, nullable: false),
+                    Title = table.Column<string>(type: "character varying(512)", maxLength: 512, nullable: false),
+                    Description = table.Column<string>(type: "character varying(4000)", maxLength: 4000, nullable: true),
+                    IsAllDay = table.Column<bool>(type: "boolean", nullable: false),
+                    IsFloatingTime = table.Column<bool>(type: "boolean", nullable: false),
+                    StartDate = table.Column<DateOnly>(type: "date", nullable: false),
+                    EndDate = table.Column<DateOnly>(type: "date", nullable: false),
+                    StartLocalDateTime = table.Column<DateTime>(type: "timestamp with time zone", nullable: true),
+                    EndLocalDateTime = table.Column<DateTime>(type: "timestamp with time zone", nullable: true),
+                    StartUtc = table.Column<DateTimeOffset>(type: "timestamp with time zone", nullable: true),
+                    EndUtc = table.Column<DateTimeOffset>(type: "timestamp with time zone", nullable: true),
+                    TimeZoneId = table.Column<string>(type: "character varying(128)", maxLength: 128, nullable: true),
+                    RecurrenceId = table.Column<string>(type: "character varying(512)", maxLength: 512, nullable: true),
+                    Location = table.Column<string>(type: "character varying(512)", maxLength: 512, nullable: true),
+                    SourceUrl = table.Column<string>(type: "character varying(2048)", maxLength: 2048, nullable: true),
+                    SourceLastModifiedAt = table.Column<DateTimeOffset>(type: "timestamp with time zone", nullable: true),
+                    ImportedAt = table.Column<DateTimeOffset>(type: "timestamp with time zone", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_CalendarEvents", x => x.Id);
+                    table.ForeignKey(
+                        name: "FK_CalendarEvents_CalendarSources_CalendarSourceId",
+                        column: x => x.CalendarSourceId,
+                        principalTable: "CalendarSources",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                });
+
             migrationBuilder.CreateTable(
                 name: "FeedbackActivityEntries",
                 columns: table => new
@@ -620,6 +768,16 @@ namespace Socialize.Api.Migrations
                         onDelete: ReferentialAction.Restrict);
                 });
 
+            migrationBuilder.InsertData(
+                table: "CalendarCatalogEntries",
+                columns: new[] { "Id", "Category", "Country", "CultureOrReligion", "DefaultColor", "Description", "Language", "ProviderName", "Region", "SourceUrl", "Title", "TrustLevel" },
+                values: new object[,]
+                {
+                    { new Guid("10000000-0000-0000-0000-000000000001"), "public-holiday", "US", null, "#2F80ED", "Federal public holiday calendar for the United States.", "en", "Nager.Date", null, "https://date.nager.at/api/v3/PublicHolidays/2026/US", "United States Public Holidays", "Verified" },
+                    { new Guid("10000000-0000-0000-0000-000000000002"), "public-holiday", "CA", null, "#2F80ED", "Public holiday calendar for Canada.", "en", "Nager.Date", null, "https://date.nager.at/api/v3/PublicHolidays/2026/CA", "Canada Public Holidays", "Verified" },
+                    { new Guid("10000000-0000-0000-0000-000000000003"), "marketing-moment", null, null, "#9B51E0", "Common retail, awareness, and social planning moments.", "en", "Socialize", null, "https://example.com/socialize/marketing-moments.ics", "Common Marketing Moments", "Maintained" }
+                });
+
             migrationBuilder.CreateIndex(
                 name: "IX_ApprovalDecisions_ApprovalRequestId",
                 table: "ApprovalDecisions",
@@ -720,6 +878,52 @@ namespace Socialize.Api.Migrations
                 table: "Assets",
                 column: "WorkspaceId");
 
+            migrationBuilder.CreateIndex(
+                name: "IX_CalendarCatalogEntries_Category",
+                table: "CalendarCatalogEntries",
+                column: "Category");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_CalendarCatalogEntries_Country",
+                table: "CalendarCatalogEntries",
+                column: "Country");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_CalendarCatalogEntries_ProviderName",
+                table: "CalendarCatalogEntries",
+                column: "ProviderName");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_CalendarEvents_CalendarSourceId",
+                table: "CalendarEvents",
+                column: "CalendarSourceId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_CalendarEvents_CalendarSourceId_SourceEventUid_StartDate",
+                table: "CalendarEvents",
+                columns: new[] { "CalendarSourceId", "SourceEventUid", "StartDate" },
+                unique: true);
+
+            migrationBuilder.CreateIndex(
+                name: "IX_CalendarSources_OrganizationId",
+                table: "CalendarSources",
+                column: "OrganizationId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_CalendarSources_Scope",
+                table: "CalendarSources",
+                column: "Scope");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_CalendarSources_UserId",
+                table: "CalendarSources",
+                column: "UserId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_CalendarSources_WorkspaceId",
+                table: "CalendarSources",
+                column: "WorkspaceId");
+
             migrationBuilder.CreateIndex(
                 name: "IX_Campaigns_ClientId",
                 table: "Campaigns",
@@ -736,6 +940,17 @@ namespace Socialize.Api.Migrations
                 table: "Campaigns",
                 column: "WorkspaceId");
 
+            migrationBuilder.CreateIndex(
+                name: "IX_Channels_WorkspaceId",
+                table: "Channels",
+                column: "WorkspaceId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Channels_WorkspaceId_Network_Name",
+                table: "Channels",
+                columns: new[] { "WorkspaceId", "Network", "Name" },
+                unique: true);
+
             migrationBuilder.CreateIndex(
                 name: "IX_Clients_WorkspaceId",
                 table: "Clients",
@@ -762,6 +977,21 @@ namespace Socialize.Api.Migrations
                 table: "Comments",
                 column: "WorkspaceId");
 
+            migrationBuilder.CreateIndex(
+                name: "IX_ContentItemActivityEntries_ContentItemId",
+                table: "ContentItemActivityEntries",
+                column: "ContentItemId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_ContentItemActivityEntries_ContentItemId_CreatedAt",
+                table: "ContentItemActivityEntries",
+                columns: new[] { "ContentItemId", "CreatedAt" });
+
+            migrationBuilder.CreateIndex(
+                name: "IX_ContentItemActivityEntries_WorkspaceId",
+                table: "ContentItemActivityEntries",
+                column: "WorkspaceId");
+
             migrationBuilder.CreateIndex(
                 name: "IX_ContentItemRevisions_ContentItemId",
                 table: "ContentItemRevisions",
@@ -901,6 +1131,18 @@ namespace Socialize.Api.Migrations
                 table: "Organizations",
                 column: "OwnerUserId");
 
+            migrationBuilder.CreateIndex(
+                name: "IX_UserCalendarExportFeeds_TokenHash",
+                table: "UserCalendarExportFeeds",
+                column: "TokenHash",
+                unique: true);
+
+            migrationBuilder.CreateIndex(
+                name: "IX_UserCalendarExportFeeds_UserId",
+                table: "UserCalendarExportFeeds",
+                column: "UserId",
+                unique: true);
+
             migrationBuilder.CreateIndex(
                 name: "IX_WorkspaceApprovalStepConfigurations_WorkspaceId",
                 table: "WorkspaceApprovalStepConfigurations",
@@ -966,15 +1208,27 @@ namespace Socialize.Api.Migrations
             migrationBuilder.DropTable(
                 name: "Assets");
 
+            migrationBuilder.DropTable(
+                name: "CalendarCatalogEntries");
+
+            migrationBuilder.DropTable(
+                name: "CalendarEvents");
+
             migrationBuilder.DropTable(
                 name: "Campaigns");
 
+            migrationBuilder.DropTable(
+                name: "Channels");
+
             migrationBuilder.DropTable(
                 name: "Clients");
 
             migrationBuilder.DropTable(
                 name: "Comments");
 
+            migrationBuilder.DropTable(
+                name: "ContentItemActivityEntries");
+
             migrationBuilder.DropTable(
                 name: "ContentItemRevisions");
 
@@ -999,6 +1253,9 @@ namespace Socialize.Api.Migrations
             migrationBuilder.DropTable(
                 name: "OrganizationMemberships");
 
+            migrationBuilder.DropTable(
+                name: "UserCalendarExportFeeds");
+
             migrationBuilder.DropTable(
                 name: "WorkspaceApprovalStepConfigurations");
 
@@ -1014,6 +1271,9 @@ namespace Socialize.Api.Migrations
             migrationBuilder.DropTable(
                 name: "AspNetUsers");
 
+            migrationBuilder.DropTable(
+                name: "CalendarSources");
+
             migrationBuilder.DropTable(
                 name: "FeedbackReports");
 

backend/src/Socialize.Api/Migrations/20260507185052_AddMissingDomainForeignKeys.cs

@@ -0,0 +1,405 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace Socialize.Api.Migrations
+{
+    /// <inheritdoc />
+    internal partial class AddMissingDomainForeignKeys : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.CreateIndex(
+                name: "IX_FeedbackReports_CampaignId",
+                table: "FeedbackReports",
+                column: "CampaignId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_FeedbackReports_ClientId",
+                table: "FeedbackReports",
+                column: "ClientId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_FeedbackReports_ContentItemId",
+                table: "FeedbackReports",
+                column: "ContentItemId");
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_ApprovalDecisions_ApprovalRequests_ApprovalRequestId",
+                table: "ApprovalDecisions",
+                column: "ApprovalRequestId",
+                principalTable: "ApprovalRequests",
+                principalColumn: "Id",
+                onDelete: ReferentialAction.Restrict);
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_ApprovalRequests_ApprovalWorkflowInstances_WorkflowInstance~",
+                table: "ApprovalRequests",
+                column: "WorkflowInstanceId",
+                principalTable: "ApprovalWorkflowInstances",
+                principalColumn: "Id",
+                onDelete: ReferentialAction.Restrict);
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_ApprovalRequests_ContentItems_ContentItemId",
+                table: "ApprovalRequests",
+                column: "ContentItemId",
+                principalTable: "ContentItems",
+                principalColumn: "Id",
+                onDelete: ReferentialAction.Restrict);
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_ApprovalRequests_Workspaces_WorkspaceId",
+                table: "ApprovalRequests",
+                column: "WorkspaceId",
+                principalTable: "Workspaces",
+                principalColumn: "Id",
+                onDelete: ReferentialAction.Restrict);
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_ApprovalWorkflowInstances_ContentItems_ContentItemId",
+                table: "ApprovalWorkflowInstances",
+                column: "ContentItemId",
+                principalTable: "ContentItems",
+                principalColumn: "Id",
+                onDelete: ReferentialAction.Restrict);
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_ApprovalWorkflowInstances_Workspaces_WorkspaceId",
+                table: "ApprovalWorkflowInstances",
+                column: "WorkspaceId",
+                principalTable: "Workspaces",
+                principalColumn: "Id",
+                onDelete: ReferentialAction.Restrict);
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_AssetRevisions_Assets_AssetId",
+                table: "AssetRevisions",
+                column: "AssetId",
+                principalTable: "Assets",
+                principalColumn: "Id",
+                onDelete: ReferentialAction.Cascade);
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_Assets_ContentItems_ContentItemId",
+                table: "Assets",
+                column: "ContentItemId",
+                principalTable: "ContentItems",
+                principalColumn: "Id",
+                onDelete: ReferentialAction.Restrict);
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_Assets_Workspaces_WorkspaceId",
+                table: "Assets",
+                column: "WorkspaceId",
+                principalTable: "Workspaces",
+                principalColumn: "Id",
+                onDelete: ReferentialAction.Restrict);
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_Campaigns_Clients_ClientId",
+                table: "Campaigns",
+                column: "ClientId",
+                principalTable: "Clients",
+                principalColumn: "Id",
+                onDelete: ReferentialAction.Restrict);
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_Campaigns_Workspaces_WorkspaceId",
+                table: "Campaigns",
+                column: "WorkspaceId",
+                principalTable: "Workspaces",
+                principalColumn: "Id",
+                onDelete: ReferentialAction.Restrict);
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_Channels_Workspaces_WorkspaceId",
+                table: "Channels",
+                column: "WorkspaceId",
+                principalTable: "Workspaces",
+                principalColumn: "Id",
+                onDelete: ReferentialAction.Restrict);
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_Clients_Workspaces_WorkspaceId",
+                table: "Clients",
+                column: "WorkspaceId",
+                principalTable: "Workspaces",
+                principalColumn: "Id",
+                onDelete: ReferentialAction.Restrict);
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_Comments_Comments_ParentCommentId",
+                table: "Comments",
+                column: "ParentCommentId",
+                principalTable: "Comments",
+                principalColumn: "Id",
+                onDelete: ReferentialAction.Restrict);
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_Comments_ContentItems_ContentItemId",
+                table: "Comments",
+                column: "ContentItemId",
+                principalTable: "ContentItems",
+                principalColumn: "Id",
+                onDelete: ReferentialAction.Restrict);
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_Comments_Workspaces_WorkspaceId",
+                table: "Comments",
+                column: "WorkspaceId",
+                principalTable: "Workspaces",
+                principalColumn: "Id",
+                onDelete: ReferentialAction.Restrict);
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_ContentItemActivityEntries_ContentItems_ContentItemId",
+                table: "ContentItemActivityEntries",
+                column: "ContentItemId",
+                principalTable: "ContentItems",
+                principalColumn: "Id",
+                onDelete: ReferentialAction.Restrict);
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_ContentItemActivityEntries_Workspaces_WorkspaceId",
+                table: "ContentItemActivityEntries",
+                column: "WorkspaceId",
+                principalTable: "Workspaces",
+                principalColumn: "Id",
+                onDelete: ReferentialAction.Restrict);
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_ContentItemRevisions_ContentItems_ContentItemId",
+                table: "ContentItemRevisions",
+                column: "ContentItemId",
+                principalTable: "ContentItems",
+                principalColumn: "Id",
+                onDelete: ReferentialAction.Cascade);
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_ContentItems_Campaigns_CampaignId",
+                table: "ContentItems",
+                column: "CampaignId",
+                principalTable: "Campaigns",
+                principalColumn: "Id",
+                onDelete: ReferentialAction.Restrict);
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_ContentItems_Clients_ClientId",
+                table: "ContentItems",
+                column: "ClientId",
+                principalTable: "Clients",
+                principalColumn: "Id",
+                onDelete: ReferentialAction.Restrict);
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_ContentItems_Workspaces_WorkspaceId",
+                table: "ContentItems",
+                column: "WorkspaceId",
+                principalTable: "Workspaces",
+                principalColumn: "Id",
+                onDelete: ReferentialAction.Restrict);
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_FeedbackReports_Campaigns_CampaignId",
+                table: "FeedbackReports",
+                column: "CampaignId",
+                principalTable: "Campaigns",
+                principalColumn: "Id",
+                onDelete: ReferentialAction.SetNull);
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_FeedbackReports_Clients_ClientId",
+                table: "FeedbackReports",
+                column: "ClientId",
+                principalTable: "Clients",
+                principalColumn: "Id",
+                onDelete: ReferentialAction.SetNull);
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_FeedbackReports_ContentItems_ContentItemId",
+                table: "FeedbackReports",
+                column: "ContentItemId",
+                principalTable: "ContentItems",
+                principalColumn: "Id",
+                onDelete: ReferentialAction.SetNull);
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_FeedbackReports_Workspaces_WorkspaceId",
+                table: "FeedbackReports",
+                column: "WorkspaceId",
+                principalTable: "Workspaces",
+                principalColumn: "Id",
+                onDelete: ReferentialAction.SetNull);
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_NotificationEvents_ContentItems_ContentItemId",
+                table: "NotificationEvents",
+                column: "ContentItemId",
+                principalTable: "ContentItems",
+                principalColumn: "Id",
+                onDelete: ReferentialAction.SetNull);
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_NotificationEvents_Workspaces_WorkspaceId",
+                table: "NotificationEvents",
+                column: "WorkspaceId",
+                principalTable: "Workspaces",
+                principalColumn: "Id",
+                onDelete: ReferentialAction.Restrict);
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_WorkspaceApprovalStepConfigurations_Workspaces_WorkspaceId",
+                table: "WorkspaceApprovalStepConfigurations",
+                column: "WorkspaceId",
+                principalTable: "Workspaces",
+                principalColumn: "Id",
+                onDelete: ReferentialAction.Restrict);
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_WorkspaceInvites_Workspaces_WorkspaceId",
+                table: "WorkspaceInvites",
+                column: "WorkspaceId",
+                principalTable: "Workspaces",
+                principalColumn: "Id",
+                onDelete: ReferentialAction.Restrict);
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropForeignKey(
+                name: "FK_ApprovalDecisions_ApprovalRequests_ApprovalRequestId",
+                table: "ApprovalDecisions");
+
+            migrationBuilder.DropForeignKey(
+                name: "FK_ApprovalRequests_ApprovalWorkflowInstances_WorkflowInstance~",
+                table: "ApprovalRequests");
+
+            migrationBuilder.DropForeignKey(
+                name: "FK_ApprovalRequests_ContentItems_ContentItemId",
+                table: "ApprovalRequests");
+
+            migrationBuilder.DropForeignKey(
+                name: "FK_ApprovalRequests_Workspaces_WorkspaceId",
+                table: "ApprovalRequests");
+
+            migrationBuilder.DropForeignKey(
+                name: "FK_ApprovalWorkflowInstances_ContentItems_ContentItemId",
+                table: "ApprovalWorkflowInstances");
+
+            migrationBuilder.DropForeignKey(
+                name: "FK_ApprovalWorkflowInstances_Workspaces_WorkspaceId",
+                table: "ApprovalWorkflowInstances");
+
+            migrationBuilder.DropForeignKey(
+                name: "FK_AssetRevisions_Assets_AssetId",
+                table: "AssetRevisions");
+
+            migrationBuilder.DropForeignKey(
+                name: "FK_Assets_ContentItems_ContentItemId",
+                table: "Assets");
+
+            migrationBuilder.DropForeignKey(
+                name: "FK_Assets_Workspaces_WorkspaceId",
+                table: "Assets");
+
+            migrationBuilder.DropForeignKey(
+                name: "FK_Campaigns_Clients_ClientId",
+                table: "Campaigns");
+
+            migrationBuilder.DropForeignKey(
+                name: "FK_Campaigns_Workspaces_WorkspaceId",
+                table: "Campaigns");
+
+            migrationBuilder.DropForeignKey(
+                name: "FK_Channels_Workspaces_WorkspaceId",
+                table: "Channels");
+
+            migrationBuilder.DropForeignKey(
+                name: "FK_Clients_Workspaces_WorkspaceId",
+                table: "Clients");
+
+            migrationBuilder.DropForeignKey(
+                name: "FK_Comments_Comments_ParentCommentId",
+                table: "Comments");
+
+            migrationBuilder.DropForeignKey(
+                name: "FK_Comments_ContentItems_ContentItemId",
+                table: "Comments");
+
+            migrationBuilder.DropForeignKey(
+                name: "FK_Comments_Workspaces_WorkspaceId",
+                table: "Comments");
+
+            migrationBuilder.DropForeignKey(
+                name: "FK_ContentItemActivityEntries_ContentItems_ContentItemId",
+                table: "ContentItemActivityEntries");
+
+            migrationBuilder.DropForeignKey(
+                name: "FK_ContentItemActivityEntries_Workspaces_WorkspaceId",
+                table: "ContentItemActivityEntries");
+
+            migrationBuilder.DropForeignKey(
+                name: "FK_ContentItemRevisions_ContentItems_ContentItemId",
+                table: "ContentItemRevisions");
+
+            migrationBuilder.DropForeignKey(
+                name: "FK_ContentItems_Campaigns_CampaignId",
+                table: "ContentItems");
+
+            migrationBuilder.DropForeignKey(
+                name: "FK_ContentItems_Clients_ClientId",
+                table: "ContentItems");
+
+            migrationBuilder.DropForeignKey(
+                name: "FK_ContentItems_Workspaces_WorkspaceId",
+                table: "ContentItems");
+
+            migrationBuilder.DropForeignKey(
+                name: "FK_FeedbackReports_Campaigns_CampaignId",
+                table: "FeedbackReports");
+
+            migrationBuilder.DropForeignKey(
+                name: "FK_FeedbackReports_Clients_ClientId",
+                table: "FeedbackReports");
+
+            migrationBuilder.DropForeignKey(
+                name: "FK_FeedbackReports_ContentItems_ContentItemId",
+                table: "FeedbackReports");
+
+            migrationBuilder.DropForeignKey(
+                name: "FK_FeedbackReports_Workspaces_WorkspaceId",
+                table: "FeedbackReports");
+
+            migrationBuilder.DropForeignKey(
+                name: "FK_NotificationEvents_ContentItems_ContentItemId",
+                table: "NotificationEvents");
+
+            migrationBuilder.DropForeignKey(
+                name: "FK_NotificationEvents_Workspaces_WorkspaceId",
+                table: "NotificationEvents");
+
+            migrationBuilder.DropForeignKey(
+                name: "FK_WorkspaceApprovalStepConfigurations_Workspaces_WorkspaceId",
+                table: "WorkspaceApprovalStepConfigurations");
+
+            migrationBuilder.DropForeignKey(
+                name: "FK_WorkspaceInvites_Workspaces_WorkspaceId",
+                table: "WorkspaceInvites");
+
+            migrationBuilder.DropIndex(
+                name: "IX_FeedbackReports_CampaignId",
+                table: "FeedbackReports");
+
+            migrationBuilder.DropIndex(
+                name: "IX_FeedbackReports_ClientId",
+                table: "FeedbackReports");
+
+            migrationBuilder.DropIndex(
+                name: "IX_FeedbackReports_ContentItemId",
+                table: "FeedbackReports");
+        }
+    }
+}

backend/src/Socialize.Api/Migrations/20260508001846_AddOrganizationMembershipTiers.cs

@@ -0,0 +1,118 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+#pragma warning disable CA1814 // Prefer jagged arrays over multidimensional
+
+namespace Socialize.Api.Migrations
+{
+    /// <inheritdoc />
+    internal partial class AddOrganizationMembershipTiers : Migration
+    {
+        private static readonly string[] MembershipTierSeedColumns =
+        [
+            "Id",
+            "ActiveContentLimit",
+            "Description",
+            "ExternalReviewerLimit",
+            "IsCustom",
+            "Key",
+            "MemberLimit",
+            "MonthlyPriceCents",
+            "Name",
+            "SortOrder",
+            "WorkspaceLimit"
+        ];
+
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            ArgumentNullException.ThrowIfNull(migrationBuilder);
+
+            migrationBuilder.AddColumn<Guid>(
+                name: "MembershipTierId",
+                table: "Organizations",
+                type: "uuid",
+                nullable: false,
+                defaultValue: new Guid("20000000-0000-0000-0000-000000000001"));
+
+            migrationBuilder.CreateTable(
+                name: "OrganizationMembershipTiers",
+                columns: table => new
+                {
+                    Id = table.Column<Guid>(type: "uuid", nullable: false),
+                    Key = table.Column<string>(type: "character varying(64)", maxLength: 64, nullable: false),
+                    Name = table.Column<string>(type: "character varying(128)", maxLength: 128, nullable: false),
+                    Description = table.Column<string>(type: "character varying(512)", maxLength: 512, nullable: false),
+                    MonthlyPriceCents = table.Column<int>(type: "integer", nullable: true),
+                    WorkspaceLimit = table.Column<int>(type: "integer", nullable: true),
+                    ActiveContentLimit = table.Column<int>(type: "integer", nullable: true),
+                    MemberLimit = table.Column<int>(type: "integer", nullable: true),
+                    ExternalReviewerLimit = table.Column<int>(type: "integer", nullable: true),
+                    IsCustom = table.Column<bool>(type: "boolean", nullable: false),
+                    SortOrder = table.Column<int>(type: "integer", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_OrganizationMembershipTiers", x => x.Id);
+                });
+
+            migrationBuilder.InsertData(
+                table: "OrganizationMembershipTiers",
+                columns: MembershipTierSeedColumns,
+                values: new object[,]
+                {
+                    { new Guid("20000000-0000-0000-0000-000000000001"), 3, "For trying Socialize on one real approval workflow.", 1, false, "free", 2, 0, "Free", 10, 1 },
+                    { new Guid("20000000-0000-0000-0000-000000000002"), 25, "For solo operators managing recurring client reviews.", 10, false, "freelance", 5, 1900, "Freelance", 20, 3 },
+                    { new Guid("20000000-0000-0000-0000-000000000003"), 250, "For agencies that need repeatable client approval operations.", null, false, "agency", 25, 7900, "Agency", 30, 15 },
+                    { new Guid("20000000-0000-0000-0000-000000000004"), null, "For larger organizations with governance and access needs.", null, true, "enterprise", null, null, "Enterprise", 40, null }
+                });
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Organizations_MembershipTierId",
+                table: "Organizations",
+                column: "MembershipTierId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_OrganizationMembershipTiers_Key",
+                table: "OrganizationMembershipTiers",
+                column: "Key",
+                unique: true);
+
+            migrationBuilder.CreateIndex(
+                name: "IX_OrganizationMembershipTiers_SortOrder",
+                table: "OrganizationMembershipTiers",
+                column: "SortOrder");
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_Organizations_OrganizationMembershipTiers_MembershipTierId",
+                table: "Organizations",
+                column: "MembershipTierId",
+                principalTable: "OrganizationMembershipTiers",
+                principalColumn: "Id",
+                onDelete: ReferentialAction.Restrict);
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            ArgumentNullException.ThrowIfNull(migrationBuilder);
+
+            migrationBuilder.DropForeignKey(
+                name: "FK_Organizations_OrganizationMembershipTiers_MembershipTierId",
+                table: "Organizations");
+
+            migrationBuilder.DropTable(
+                name: "OrganizationMembershipTiers");
+
+            migrationBuilder.DropIndex(
+                name: "IX_Organizations_MembershipTierId",
+                table: "Organizations");
+
+            migrationBuilder.DropColumn(
+                name: "MembershipTierId",
+                table: "Organizations");
+        }
+    }
+}

backend/src/Socialize.Api/Migrations/20260508003746_LocalizeOrganizationMembershipTiers.cs

@@ -0,0 +1,137 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+#pragma warning disable CA1814 // Prefer jagged arrays over multidimensional
+
+namespace Socialize.Api.Migrations
+{
+    /// <inheritdoc />
+    internal partial class LocalizeOrganizationMembershipTiers : Migration
+    {
+        private static readonly string[] MembershipTierTranslationSeedColumns =
+        [
+            "Id",
+            "Culture",
+            "Description",
+            "MembershipTierId",
+            "Name"
+        ];
+
+        private static readonly string[] MembershipTierColumnsToRestore =
+        [
+            "Description",
+            "Name"
+        ];
+
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            ArgumentNullException.ThrowIfNull(migrationBuilder);
+
+            migrationBuilder.DropColumn(
+                name: "Description",
+                table: "OrganizationMembershipTiers");
+
+            migrationBuilder.DropColumn(
+                name: "Name",
+                table: "OrganizationMembershipTiers");
+
+            migrationBuilder.CreateTable(
+                name: "OrganizationMembershipTierTranslations",
+                columns: table => new
+                {
+                    Id = table.Column<Guid>(type: "uuid", nullable: false),
+                    MembershipTierId = table.Column<Guid>(type: "uuid", nullable: false),
+                    Culture = table.Column<string>(type: "character varying(16)", maxLength: 16, nullable: false),
+                    Name = table.Column<string>(type: "character varying(128)", maxLength: 128, nullable: false),
+                    Description = table.Column<string>(type: "character varying(512)", maxLength: 512, nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_OrganizationMembershipTierTranslations", x => x.Id);
+                    table.ForeignKey(
+                        name: "FK_OrganizationMembershipTierTranslations_OrganizationMembersh~",
+                        column: x => x.MembershipTierId,
+                        principalTable: "OrganizationMembershipTiers",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                });
+
+            migrationBuilder.InsertData(
+                table: "OrganizationMembershipTierTranslations",
+                columns: MembershipTierTranslationSeedColumns,
+                values: new object[,]
+                {
+                    { new Guid("20000000-0000-0001-0000-000000000001"), "en", "For trying Socialize on one real approval workflow.", new Guid("20000000-0000-0000-0000-000000000001"), "Free" },
+                    { new Guid("20000000-0000-0001-0000-000000000002"), "fr", "Pour essayer Socialize sur un vrai workflow d'approbation.", new Guid("20000000-0000-0000-0000-000000000001"), "Free" },
+                    { new Guid("20000000-0000-0001-0000-000000000003"), "en", "For solo operators managing recurring client reviews.", new Guid("20000000-0000-0000-0000-000000000002"), "Freelance" },
+                    { new Guid("20000000-0000-0001-0000-000000000004"), "fr", "Pour les independants qui gerent des revisions client recurrentes.", new Guid("20000000-0000-0000-0000-000000000002"), "Freelance" },
+                    { new Guid("20000000-0000-0001-0000-000000000005"), "en", "For agencies that need repeatable client approval operations.", new Guid("20000000-0000-0000-0000-000000000003"), "Agency" },
+                    { new Guid("20000000-0000-0001-0000-000000000006"), "fr", "Pour les agences qui veulent des operations d'approbation client repetables.", new Guid("20000000-0000-0000-0000-000000000003"), "Agency" },
+                    { new Guid("20000000-0000-0001-0000-000000000007"), "en", "For larger organizations with governance and access needs.", new Guid("20000000-0000-0000-0000-000000000004"), "Enterprise" },
+                    { new Guid("20000000-0000-0001-0000-000000000008"), "fr", "Pour les grandes organisations avec des besoins de gouvernance et d'acces.", new Guid("20000000-0000-0000-0000-000000000004"), "Enterprise" }
+                });
+
+            migrationBuilder.CreateIndex(
+                name: "IX_OrganizationMembershipTierTranslations_MembershipTierId_Cul~",
+                table: "OrganizationMembershipTierTranslations",
+                columns: ["MembershipTierId", "Culture"],
+                unique: true);
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            ArgumentNullException.ThrowIfNull(migrationBuilder);
+
+            migrationBuilder.DropTable(
+                name: "OrganizationMembershipTierTranslations");
+
+            migrationBuilder.AddColumn<string>(
+                name: "Description",
+                table: "OrganizationMembershipTiers",
+                type: "character varying(512)",
+                maxLength: 512,
+                nullable: false,
+                defaultValue: "");
+
+            migrationBuilder.AddColumn<string>(
+                name: "Name",
+                table: "OrganizationMembershipTiers",
+                type: "character varying(128)",
+                maxLength: 128,
+                nullable: false,
+                defaultValue: "");
+
+            migrationBuilder.UpdateData(
+                table: "OrganizationMembershipTiers",
+                keyColumn: "Id",
+                keyValue: new Guid("20000000-0000-0000-0000-000000000001"),
+                columns: MembershipTierColumnsToRestore,
+                values: new object[] { "For trying Socialize on one real approval workflow.", "Free" });
+
+            migrationBuilder.UpdateData(
+                table: "OrganizationMembershipTiers",
+                keyColumn: "Id",
+                keyValue: new Guid("20000000-0000-0000-0000-000000000002"),
+                columns: MembershipTierColumnsToRestore,
+                values: new object[] { "For solo operators managing recurring client reviews.", "Freelance" });
+
+            migrationBuilder.UpdateData(
+                table: "OrganizationMembershipTiers",
+                keyColumn: "Id",
+                keyValue: new Guid("20000000-0000-0000-0000-000000000003"),
+                columns: MembershipTierColumnsToRestore,
+                values: new object[] { "For agencies that need repeatable client approval operations.", "Agency" });
+
+            migrationBuilder.UpdateData(
+                table: "OrganizationMembershipTiers",
+                keyColumn: "Id",
+                keyValue: new Guid("20000000-0000-0000-0000-000000000004"),
+                columns: MembershipTierColumnsToRestore,
+                values: new object[] { "For larger organizations with governance and access needs.", "Enterprise" });
+        }
+    }
+}

backend/src/Socialize.Api/Migrations/20260508010206_AddReleaseCommunications.cs

@@ -0,0 +1,197 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace Socialize.Api.Migrations
+{
+    /// <inheritdoc />
+    internal partial class AddReleaseCommunications : Migration
+    {
+        private static readonly string[] ReleaseUpdateReadReceiptUniqueIndexColumns =
+        [
+            "ReleaseUpdateId",
+            "UserId",
+        ];
+
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<DateTimeOffset>(
+                name: "LastAuthenticatedAt",
+                table: "AspNetUsers",
+                type: "timestamp with time zone",
+                nullable: true);
+
+            migrationBuilder.CreateTable(
+                name: "ReleaseUpdateEmailDigestReceipts",
+                columns: table => new
+                {
+                    Id = table.Column<Guid>(type: "uuid", nullable: false),
+                    UserId = table.Column<Guid>(type: "uuid", nullable: false),
+                    SentAt = table.Column<DateTimeOffset>(type: "timestamp with time zone", nullable: false, defaultValueSql: "CURRENT_TIMESTAMP"),
+                    UpdateCount = table.Column<int>(type: "integer", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_ReleaseUpdateEmailDigestReceipts", x => x.Id);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "ReleaseUpdates",
+                columns: table => new
+                {
+                    Id = table.Column<Guid>(type: "uuid", nullable: false),
+                    Title = table.Column<string>(type: "character varying(160)", maxLength: 160, nullable: false),
+                    Summary = table.Column<string>(type: "character varying(512)", maxLength: 512, nullable: false),
+                    Body = table.Column<string>(type: "character varying(8000)", maxLength: 8000, nullable: true),
+                    Category = table.Column<string>(type: "character varying(32)", maxLength: 32, nullable: false),
+                    Importance = table.Column<string>(type: "character varying(32)", maxLength: 32, nullable: false),
+                    Audience = table.Column<string>(type: "character varying(32)", maxLength: 32, nullable: false),
+                    Status = table.Column<string>(type: "character varying(32)", maxLength: 32, nullable: false),
+                    DeploymentLabel = table.Column<string>(type: "character varying(128)", maxLength: 128, nullable: true),
+                    BuildVersion = table.Column<string>(type: "character varying(128)", maxLength: 128, nullable: true),
+                    CommitRange = table.Column<string>(type: "character varying(256)", maxLength: 256, nullable: true),
+                    CreatedByUserId = table.Column<Guid>(type: "uuid", nullable: false),
+                    CreatedAt = table.Column<DateTimeOffset>(type: "timestamp with time zone", nullable: false, defaultValueSql: "CURRENT_TIMESTAMP"),
+                    UpdatedAt = table.Column<DateTimeOffset>(type: "timestamp with time zone", nullable: false),
+                    PublishedAt = table.Column<DateTimeOffset>(type: "timestamp with time zone", nullable: true),
+                    ArchivedAt = table.Column<DateTimeOffset>(type: "timestamp with time zone", nullable: true),
+                    ManualEmailSentByUserId = table.Column<Guid>(type: "uuid", nullable: true),
+                    ManualEmailSentAt = table.Column<DateTimeOffset>(type: "timestamp with time zone", nullable: true),
+                    ManualEmailAudience = table.Column<string>(type: "character varying(64)", maxLength: 64, nullable: true),
+                    ManualEmailRecipientCount = table.Column<int>(type: "integer", nullable: true)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_ReleaseUpdates", x => x.Id);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "ReleaseCommits",
+                columns: table => new
+                {
+                    Sha = table.Column<string>(type: "character varying(64)", maxLength: 64, nullable: false),
+                    ShortSha = table.Column<string>(type: "character varying(16)", maxLength: 16, nullable: false),
+                    Subject = table.Column<string>(type: "character varying(512)", maxLength: 512, nullable: false),
+                    AuthorName = table.Column<string>(type: "character varying(256)", maxLength: 256, nullable: true),
+                    AuthorEmail = table.Column<string>(type: "character varying(256)", maxLength: 256, nullable: true),
+                    AuthoredAt = table.Column<DateTimeOffset>(type: "timestamp with time zone", nullable: true),
+                    CommittedAt = table.Column<DateTimeOffset>(type: "timestamp with time zone", nullable: true),
+                    SourceBranch = table.Column<string>(type: "character varying(256)", maxLength: 256, nullable: true),
+                    DeploymentLabel = table.Column<string>(type: "character varying(128)", maxLength: 128, nullable: true),
+                    ExternalUrl = table.Column<string>(type: "character varying(2048)", maxLength: 2048, nullable: true),
+                    CommunicationStatus = table.Column<string>(type: "character varying(32)", maxLength: 32, nullable: false),
+                    ReleaseUpdateId = table.Column<Guid>(type: "uuid", nullable: true),
+                    ImportedAt = table.Column<DateTimeOffset>(type: "timestamp with time zone", nullable: false, defaultValueSql: "CURRENT_TIMESTAMP"),
+                    UpdatedAt = table.Column<DateTimeOffset>(type: "timestamp with time zone", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_ReleaseCommits", x => x.Sha);
+                    table.ForeignKey(
+                        name: "FK_ReleaseCommits_ReleaseUpdates_ReleaseUpdateId",
+                        column: x => x.ReleaseUpdateId,
+                        principalTable: "ReleaseUpdates",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.SetNull);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "ReleaseUpdateReadReceipts",
+                columns: table => new
+                {
+                    Id = table.Column<Guid>(type: "uuid", nullable: false),
+                    ReleaseUpdateId = table.Column<Guid>(type: "uuid", nullable: false),
+                    UserId = table.Column<Guid>(type: "uuid", nullable: false),
+                    ReadAt = table.Column<DateTimeOffset>(type: "timestamp with time zone", nullable: false, defaultValueSql: "CURRENT_TIMESTAMP")
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_ReleaseUpdateReadReceipts", x => x.Id);
+                    table.ForeignKey(
+                        name: "FK_ReleaseUpdateReadReceipts_ReleaseUpdates_ReleaseUpdateId",
+                        column: x => x.ReleaseUpdateId,
+                        principalTable: "ReleaseUpdates",
+                        principalColumn: "Id",
+                        onDelete: ReferentialAction.Cascade);
+                });
+
+            migrationBuilder.CreateIndex(
+                name: "IX_ReleaseCommits_CommittedAt",
+                table: "ReleaseCommits",
+                column: "CommittedAt");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_ReleaseCommits_CommunicationStatus",
+                table: "ReleaseCommits",
+                column: "CommunicationStatus");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_ReleaseCommits_ReleaseUpdateId",
+                table: "ReleaseCommits",
+                column: "ReleaseUpdateId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_ReleaseUpdateEmailDigestReceipts_SentAt",
+                table: "ReleaseUpdateEmailDigestReceipts",
+                column: "SentAt");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_ReleaseUpdateEmailDigestReceipts_UserId",
+                table: "ReleaseUpdateEmailDigestReceipts",
+                column: "UserId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_ReleaseUpdateReadReceipts_ReleaseUpdateId_UserId",
+                table: "ReleaseUpdateReadReceipts",
+                columns: ReleaseUpdateReadReceiptUniqueIndexColumns,
+                unique: true);
+
+            migrationBuilder.CreateIndex(
+                name: "IX_ReleaseUpdateReadReceipts_UserId",
+                table: "ReleaseUpdateReadReceipts",
+                column: "UserId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_ReleaseUpdates_Audience",
+                table: "ReleaseUpdates",
+                column: "Audience");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_ReleaseUpdates_CreatedByUserId",
+                table: "ReleaseUpdates",
+                column: "CreatedByUserId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_ReleaseUpdates_PublishedAt",
+                table: "ReleaseUpdates",
+                column: "PublishedAt");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_ReleaseUpdates_Status",
+                table: "ReleaseUpdates",
+                column: "Status");
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "ReleaseCommits");
+
+            migrationBuilder.DropTable(
+                name: "ReleaseUpdateEmailDigestReceipts");
+
+            migrationBuilder.DropTable(
+                name: "ReleaseUpdateReadReceipts");
+
+            migrationBuilder.DropTable(
+                name: "ReleaseUpdates");
+
+            migrationBuilder.DropColumn(
+                name: "LastAuthenticatedAt",
+                table: "AspNetUsers");
+        }
+    }
+}

backend/src/Socialize.Api/Migrations/20260508152102_AddGoogleDriveDamFoundation.cs

@@ -0,0 +1,139 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace Socialize.Api.Migrations
+{
+    /// <inheritdoc />
+    internal partial class AddGoogleDriveDamFoundation : Migration
+    {
+        private static readonly string[] WorkspaceOrganizationSlugIndexColumns =
+        [
+            "OrganizationId",
+            "Slug",
+        ];
+
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            ArgumentNullException.ThrowIfNull(migrationBuilder);
+
+            migrationBuilder.AddColumn<string>(
+                name: "Slug",
+                table: "Workspaces",
+                type: "character varying(96)",
+                maxLength: 96,
+                nullable: false,
+                defaultValue: "");
+
+            migrationBuilder.Sql(
+                """
+                WITH normalized AS (
+                    SELECT
+                        "Id",
+                        "OrganizationId",
+                        COALESCE(
+                            NULLIF(
+                                trim(both '-' from lower(regexp_replace(trim("Name"), '[^a-zA-Z0-9]+', '-', 'g'))),
+                                ''
+                            ),
+                            'workspace'
+                        ) AS "BaseSlug"
+                    FROM "Workspaces"
+                ),
+                numbered AS (
+                    SELECT
+                        "Id",
+                        "BaseSlug",
+                        row_number() OVER (PARTITION BY "OrganizationId", "BaseSlug" ORDER BY "CreatedAt", "Id") AS "SlugIndex"
+                    FROM normalized
+                )
+                UPDATE "Workspaces"
+                SET "Slug" = left(
+                    CASE
+                        WHEN numbered."SlugIndex" = 1 THEN numbered."BaseSlug"
+                        ELSE numbered."BaseSlug" || '-' || numbered."SlugIndex"
+                    END,
+                    96
+                )
+                FROM numbered
+                WHERE "Workspaces"."Id" = numbered."Id";
+                """);
+
+            migrationBuilder.AddColumn<string>(
+                name: "GoogleDriveRootFolderId",
+                table: "Organizations",
+                type: "character varying(256)",
+                maxLength: 256,
+                nullable: true);
+
+            migrationBuilder.AddColumn<string>(
+                name: "GoogleDriveRootFolderName",
+                table: "Organizations",
+                type: "character varying(256)",
+                maxLength: 256,
+                nullable: true);
+
+            migrationBuilder.AddColumn<string>(
+                name: "GoogleDriveRootFolderUrl",
+                table: "Organizations",
+                type: "character varying(2048)",
+                maxLength: 2048,
+                nullable: true);
+
+            migrationBuilder.AddColumn<bool>(
+                name: "IsGoogleDriveDamEnabled",
+                table: "Organizations",
+                type: "boolean",
+                nullable: false,
+                defaultValue: false);
+
+            migrationBuilder.AddColumn<string>(
+                name: "GoogleDriveWorkspaceFolderPath",
+                table: "Assets",
+                type: "character varying(512)",
+                maxLength: 512,
+                nullable: true);
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Workspaces_OrganizationId_Slug",
+                table: "Workspaces",
+                columns: WorkspaceOrganizationSlugIndexColumns,
+                unique: true);
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            ArgumentNullException.ThrowIfNull(migrationBuilder);
+
+            migrationBuilder.DropIndex(
+                name: "IX_Workspaces_OrganizationId_Slug",
+                table: "Workspaces");
+
+            migrationBuilder.DropColumn(
+                name: "Slug",
+                table: "Workspaces");
+
+            migrationBuilder.DropColumn(
+                name: "GoogleDriveRootFolderId",
+                table: "Organizations");
+
+            migrationBuilder.DropColumn(
+                name: "GoogleDriveRootFolderName",
+                table: "Organizations");
+
+            migrationBuilder.DropColumn(
+                name: "GoogleDriveRootFolderUrl",
+                table: "Organizations");
+
+            migrationBuilder.DropColumn(
+                name: "IsGoogleDriveDamEnabled",
+                table: "Organizations");
+
+            migrationBuilder.DropColumn(
+                name: "GoogleDriveWorkspaceFolderPath",
+                table: "Assets");
+        }
+    }
+}

backend/src/Socialize.Api/Modules/Approvals/Data/ApprovalDecision.cs

@@ -1,6 +1,6 @@
 namespace Socialize.Api.Modules.Approvals.Data;
 
-public class ApprovalDecision
+internal class ApprovalDecision
 {
     public Guid Id { get; init; }
     public Guid ApprovalRequestId { get; set; }

backend/src/Socialize.Api/Modules/Approvals/Data/ApprovalModelConfiguration.cs

@@ -1,8 +1,10 @@
 using Microsoft.EntityFrameworkCore;
+using Socialize.Api.Modules.ContentItems.Data;
+using Socialize.Api.Modules.Workspaces.Data;
 
 namespace Socialize.Api.Modules.Approvals.Data;
 
-public static class ApprovalModelConfiguration
+internal static class ApprovalModelConfiguration
 {
     public static ModelBuilder ConfigureApprovalsModule(this ModelBuilder modelBuilder)
     {
@@ -20,6 +22,14 @@ public static class ApprovalModelConfiguration
             workflowInstance.HasIndex(x => new { x.ContentItemId, x.State })
                 .IsUnique()
                 .HasFilter("\"State\" = 'Pending'");
+            workflowInstance.HasOne<Workspace>()
+                .WithMany()
+                .HasForeignKey(x => x.WorkspaceId)
+                .OnDelete(DeleteBehavior.Restrict);
+            workflowInstance.HasOne<ContentItem>()
+                .WithMany()
+                .HasForeignKey(x => x.ContentItemId)
+                .OnDelete(DeleteBehavior.Restrict);
         });
 
         modelBuilder.Entity<ApprovalRequest>(approvalRequest =>
@@ -40,6 +50,18 @@ public static class ApprovalModelConfiguration
             approvalRequest.HasIndex(x => x.ContentItemId);
             approvalRequest.HasIndex(x => x.WorkflowInstanceId);
             approvalRequest.HasIndex(x => x.ReviewerEmail);
+            approvalRequest.HasOne<Workspace>()
+                .WithMany()
+                .HasForeignKey(x => x.WorkspaceId)
+                .OnDelete(DeleteBehavior.Restrict);
+            approvalRequest.HasOne<ContentItem>()
+                .WithMany()
+                .HasForeignKey(x => x.ContentItemId)
+                .OnDelete(DeleteBehavior.Restrict);
+            approvalRequest.HasOne<ApprovalWorkflowInstance>()
+                .WithMany()
+                .HasForeignKey(x => x.WorkflowInstanceId)
+                .OnDelete(DeleteBehavior.Restrict);
         });
 
         modelBuilder.Entity<ApprovalDecision>(approvalDecision =>
@@ -54,6 +76,10 @@ public static class ApprovalModelConfiguration
                 .ValueGeneratedOnAdd()
                 .HasDefaultValueSql("CURRENT_TIMESTAMP");
             approvalDecision.HasIndex(x => x.ApprovalRequestId);
+            approvalDecision.HasOne<ApprovalRequest>()
+                .WithMany()
+                .HasForeignKey(x => x.ApprovalRequestId)
+                .OnDelete(DeleteBehavior.Restrict);
         });
 
         modelBuilder.Entity<WorkspaceApprovalStepConfiguration>(approvalStep =>
@@ -69,6 +95,10 @@ public static class ApprovalModelConfiguration
                 .HasDefaultValueSql("CURRENT_TIMESTAMP");
             approvalStep.HasIndex(x => x.WorkspaceId);
             approvalStep.HasIndex(x => new { x.WorkspaceId, x.SortOrder }).IsUnique();
+            approvalStep.HasOne<Workspace>()
+                .WithMany()
+                .HasForeignKey(x => x.WorkspaceId)
+                .OnDelete(DeleteBehavior.Restrict);
         });
 
         return modelBuilder;

backend/src/Socialize.Api/Modules/Approvals/Data/ApprovalRequest.cs

@@ -1,6 +1,6 @@
 namespace Socialize.Api.Modules.Approvals.Data;
 
-public class ApprovalRequest
+internal class ApprovalRequest
 {
     public Guid Id { get; init; }
     public Guid WorkspaceId { get; set; }

backend/src/Socialize.Api/Modules/Approvals/Data/ApprovalWorkflowInstance.cs

@@ -1,6 +1,6 @@
 namespace Socialize.Api.Modules.Approvals.Data;
 
-public class ApprovalWorkflowInstance
+internal class ApprovalWorkflowInstance
 {
     public Guid Id { get; init; }
     public Guid WorkspaceId { get; set; }

backend/src/Socialize.Api/Modules/Approvals/Data/WorkspaceApprovalStepConfiguration.cs

@@ -1,6 +1,6 @@
 namespace Socialize.Api.Modules.Approvals.Data;
 
-public class WorkspaceApprovalStepConfiguration
+internal class WorkspaceApprovalStepConfiguration
 {
     public Guid Id { get; init; }
     public Guid WorkspaceId { get; set; }

backend/src/Socialize.Api/Modules/Approvals/Handlers/GetApprovals.cs

@@ -7,9 +7,9 @@ using Socialize.Api.Infrastructure.Security;
 
 namespace Socialize.Api.Modules.Approvals.Handlers;
 
-public record GetApprovalsRequest(Guid ContentItemId);
+internal record GetApprovalsRequest(Guid ContentItemId);
 
-public record ApprovalDecisionDto(
+internal record ApprovalDecisionDto(
     Guid Id,
     Guid ApprovalRequestId,
     string Decision,
@@ -20,7 +20,7 @@ public record ApprovalDecisionDto(
     string? DecidedByPortraitUrl,
     DateTimeOffset CreatedAt);
 
-public record ApprovalRequestDto(
+internal record ApprovalRequestDto(
     Guid Id,
     Guid WorkspaceId,
     Guid ContentItemId,
@@ -40,7 +40,7 @@ public record ApprovalRequestDto(
     DateTimeOffset? CompletedAt,
     IReadOnlyCollection<ApprovalDecisionDto> Decisions);
 
-public class GetApprovalsHandler(
+internal class GetApprovalsHandler(
     AppDbContext dbContext,
     AccessScopeService accessScopeService)
     : Endpoint<GetApprovalsRequest, IReadOnlyCollection<ApprovalRequestDto>>

backend/src/Socialize.Api/Modules/Approvals/Handlers/SubmitApprovalDecision.cs

@@ -3,19 +3,22 @@ using Microsoft.EntityFrameworkCore;
 using Socialize.Api.Data;
 using Socialize.Api.Infrastructure.Security;
 using Socialize.Api.Modules.ContentItems.Data;
+using Socialize.Api.Modules.ContentItems.Contracts;
 using Socialize.Api.Modules.Approvals.Data;
 using Socialize.Api.Modules.Approvals.Services;
 using Socialize.Api.Modules.Notifications.Contracts;
 using Socialize.Api.Modules.Workspaces.Data;
+using System.Security.Claims;
+using System.Text.Json;
 
 namespace Socialize.Api.Modules.Approvals.Handlers;
 
-public record SubmitApprovalDecisionRequest(
+internal record SubmitApprovalDecisionRequest(
     string Decision,
     string? ReviewerName,
     string? ReviewerEmail);
 
-public class SubmitApprovalDecisionRequestValidator
+internal class SubmitApprovalDecisionRequestValidator
     : Validator<SubmitApprovalDecisionRequest>
 {
     public SubmitApprovalDecisionRequestValidator()
@@ -29,10 +32,11 @@ public class SubmitApprovalDecisionRequestValidator
     }
 }
 
-public class SubmitApprovalDecisionHandler(
+internal class SubmitApprovalDecisionHandler(
     AppDbContext dbContext,
     AccessScopeService accessScopeService,
     ApprovalWorkflowRuntimeService approvalWorkflowRuntimeService,
+    IContentItemActivityWriter activityWriter,
     INotificationEventWriter notificationEventWriter)
     : Endpoint<SubmitApprovalDecisionRequest, ApprovalRequestDto>
 {
@@ -76,12 +80,14 @@ public class SubmitApprovalDecisionHandler(
         }
 
         string normalizedDecision = request.Decision.Trim();
-        string decidedByName = User?.Identity?.IsAuthenticated == true
+        ClaimsPrincipal? currentUser = User;
-            ? User.GetAlias() ?? User.GetName()
+        bool isAuthenticated = currentUser?.Identity?.IsAuthenticated == true;
-            : string.IsNullOrWhiteSpace(request.ReviewerName) ? approval.ReviewerName : request.ReviewerName.Trim();
+        string decidedByName = isAuthenticated
-        string decidedByEmail = User?.Identity?.IsAuthenticated == true
+            ? currentUser!.GetAlias() ?? currentUser!.GetName()
-            ? User.GetEmail()
+            : GetReviewerName(request.ReviewerName, approval.ReviewerName);
-            : string.IsNullOrWhiteSpace(request.ReviewerEmail) ? approval.ReviewerEmail : request.ReviewerEmail.Trim();
+        string decidedByEmail = isAuthenticated
+            ? currentUser!.GetEmail()
+            : GetReviewerEmail(request.ReviewerEmail, approval.ReviewerEmail);
 
         ApprovalDecision decision = new()
         {
@@ -120,6 +126,24 @@ public class SubmitApprovalDecisionHandler(
             dbContext.ApprovalDecisions.Add(decision);
             await dbContext.SaveChangesAsync(ct);
 
+            await activityWriter.WriteAsync(
+                new ContentItemActivityWriteModel(
+                    approval.WorkspaceId,
+                    approval.ContentItemId,
+                    "approval.decision.recorded",
+                    "ApprovalDecision",
+                    decision.Id,
+                    $"{decidedByName} recorded {normalizedDecision} for {contentItem.Title}.",
+                    decision.DecidedByUserId,
+                    decidedByEmail,
+                    JsonSerializer.Serialize(new
+                    {
+                        stage = approval.Stage,
+                        status = contentItem.Status,
+                        decision = normalizedDecision,
+                    })),
+                ct);
+
             await notificationEventWriter.WriteAsync(
                 new NotificationEventWriteModel(
                     approval.WorkspaceId,
@@ -186,4 +210,18 @@ public class SubmitApprovalDecisionHandler(
 
         await SendOkAsync(dto, ct);
     }
+
+    private static string GetReviewerName(string? requestedName, string fallbackName)
+    {
+        return string.IsNullOrWhiteSpace(requestedName)
+            ? fallbackName
+            : requestedName.Trim();
+    }
+
+    private static string GetReviewerEmail(string? requestedEmail, string fallbackEmail)
+    {
+        return string.IsNullOrWhiteSpace(requestedEmail)
+            ? fallbackEmail
+            : requestedEmail.Trim();
+    }
 }

backend/src/Socialize.Api/Modules/Approvals/ModuleRegistration.cs

@@ -2,7 +2,7 @@ using Socialize.Api.Modules.Approvals.Services;
 
 namespace Socialize.Api.Modules.Approvals;
 
-public static class DependencyInjection
+internal static class ModuleRegistration
 {
     public static WebApplicationBuilder AddApprovalsModule(
         this WebApplicationBuilder builder)

backend/src/Socialize.Api/Modules/Approvals/Services/ApprovalStepConfigurationRules.cs

@@ -2,20 +2,20 @@ using Socialize.Api.Modules.Identity.Contracts;
 
 namespace Socialize.Api.Modules.Approvals.Services;
 
-public static class ApprovalStepTargetTypes
+internal static class ApprovalStepTargetTypes
 {
     public const string Role = "Role";
     public const string Membership = "Membership";
     public const string Member = "Member";
 }
 
-public static class ApprovalMembershipTargets
+internal static class ApprovalMembershipTargets
 {
     public const string Team = "Team";
     public const string Client = "Client";
 }
 
-public static class ApprovalStepConfigurationRules
+internal static class ApprovalStepConfigurationRules
 {
     public static readonly IReadOnlySet<string> AllowedTargetTypes = new HashSet<string>(StringComparer.Ordinal)
     {

backend/src/Socialize.Api/Modules/Approvals/Services/ApprovalWorkflowRules.cs

@@ -2,7 +2,7 @@ using Socialize.Api.Modules.Identity.Contracts;
 
 namespace Socialize.Api.Modules.Approvals.Services;
 
-public static class ApprovalModes
+internal static class ApprovalModes
 {
     public const string None = "None";
     public const string Optional = "Optional";
@@ -10,7 +10,7 @@ public static class ApprovalModes
     public const string MultiLevel = "Multi-level";
 }
 
-public static class ApprovalWorkflowRules
+internal static class ApprovalWorkflowRules
 {
     public static bool BlocksManualApprovedOrScheduledStatus(string approvalMode)
     {

backend/src/Socialize.Api/Modules/Approvals/Services/ApprovalWorkflowRuntimeService.cs

@@ -11,15 +11,15 @@ using Socialize.Api.Modules.Workspaces.Data;
 
 namespace Socialize.Api.Modules.Approvals.Services;
 
-public record ApprovalWorkflowStartResult(bool Succeeded, string? ErrorMessage);
+internal record ApprovalWorkflowStartResult(bool Succeeded, string? ErrorMessage);
 
-public record ApprovalWorkflowDecisionResult(
+internal record ApprovalWorkflowDecisionResult(
     bool Succeeded,
     string? ErrorMessage,
     int StatusCode,
     bool IsWorkflowStep);
 
-public class ApprovalWorkflowRuntimeService(
+internal class ApprovalWorkflowRuntimeService(
     AppDbContext dbContext,
     INotificationEventWriter notificationEventWriter)
 {
@@ -145,13 +145,15 @@ public class ApprovalWorkflowRuntimeService(
         dbContext.ApprovalDecisions.Add(decision);
         await dbContext.SaveChangesAsync(ct);
 
-        int approvedCount = await dbContext.ApprovalDecisions
+        var approvalDecisionParticipants = await dbContext.ApprovalDecisions
             .Where(candidate => candidate.ApprovalRequestId == approval.Id && candidate.Decision == ApprovedState)
             .Select(candidate => candidate.DecidedByUserId.HasValue
                 ? candidate.DecidedByUserId.Value.ToString()
-                : candidate.DecidedByEmail.ToLower())
+                : candidate.DecidedByEmail)
-            .Distinct()
+            .ToListAsync(ct);
-            .CountAsync(ct);
+        int approvedCount = approvalDecisionParticipants
+            .Distinct(StringComparer.OrdinalIgnoreCase)
+            .Count();
 
         int requiredApproverCount = approval.WorkflowStepRequiredApproverCount ?? 1;
         if (!ApprovalWorkflowRules.HasRequiredStepApprovals(approvedCount, requiredApproverCount))
@@ -394,7 +396,7 @@ public class ApprovalWorkflowRuntimeService(
 
     private static string CreateAccessToken()
     {
-        return Convert.ToHexString(RandomNumberGenerator.GetBytes(16)).ToLowerInvariant();
+        return Convert.ToHexString(RandomNumberGenerator.GetBytes(16));
     }
 
     private sealed record ApprovalNotificationRecipient(Guid UserId, string? Email);

backend/src/Socialize.Api/Modules/Assets/Data/Asset.cs

@@ -1,6 +1,6 @@
 namespace Socialize.Api.Modules.Assets.Data;
 
-public class Asset
+internal class Asset
 {
     public Guid Id { get; init; }
     public Guid WorkspaceId { get; set; }
@@ -10,6 +10,7 @@ public class Asset
     public required string DisplayName { get; set; }
     public string? GoogleDriveFileId { get; set; }
     public string? GoogleDriveLink { get; set; }
+    public string? GoogleDriveWorkspaceFolderPath { get; set; }
     public string? PreviewUrl { get; set; }
     public int CurrentRevisionNumber { get; set; }
     public DateTimeOffset CreatedAt { get; init; }

backend/src/Socialize.Api/Modules/Assets/Data/AssetModelConfiguration.cs

@@ -1,8 +1,10 @@
 using Microsoft.EntityFrameworkCore;
+using Socialize.Api.Modules.ContentItems.Data;
+using Socialize.Api.Modules.Workspaces.Data;
 
 namespace Socialize.Api.Modules.Assets.Data;
 
-public static class AssetModelConfiguration
+internal static class AssetModelConfiguration
 {
     public static ModelBuilder ConfigureAssetsModule(this ModelBuilder modelBuilder)
     {
@@ -15,12 +17,21 @@ public static class AssetModelConfiguration
             asset.Property(x => x.DisplayName).HasMaxLength(256).IsRequired();
             asset.Property(x => x.GoogleDriveFileId).HasMaxLength(256);
             asset.Property(x => x.GoogleDriveLink).HasMaxLength(2048);
+            asset.Property(x => x.GoogleDriveWorkspaceFolderPath).HasMaxLength(512);
             asset.Property(x => x.PreviewUrl).HasMaxLength(2048);
             asset.Property(x => x.CreatedAt)
                 .ValueGeneratedOnAdd()
                 .HasDefaultValueSql("CURRENT_TIMESTAMP");
             asset.HasIndex(x => x.WorkspaceId);
             asset.HasIndex(x => x.ContentItemId);
+            asset.HasOne<Workspace>()
+                .WithMany()
+                .HasForeignKey(x => x.WorkspaceId)
+                .OnDelete(DeleteBehavior.Restrict);
+            asset.HasOne<ContentItem>()
+                .WithMany()
+                .HasForeignKey(x => x.ContentItemId)
+                .OnDelete(DeleteBehavior.Restrict);
         });
 
         modelBuilder.Entity<AssetRevision>(revision =>
@@ -35,6 +46,10 @@ public static class AssetModelConfiguration
                 .HasDefaultValueSql("CURRENT_TIMESTAMP");
             revision.HasIndex(x => x.AssetId);
             revision.HasIndex(x => new { x.AssetId, x.RevisionNumber }).IsUnique();
+            revision.HasOne<Asset>()
+                .WithMany()
+                .HasForeignKey(x => x.AssetId)
+                .OnDelete(DeleteBehavior.Cascade);
         });
 
         return modelBuilder;

backend/src/Socialize.Api/Modules/Assets/Data/AssetRevision.cs

@@ -1,6 +1,6 @@
 namespace Socialize.Api.Modules.Assets.Data;
 
-public class AssetRevision
+internal class AssetRevision
 {
     public Guid Id { get; init; }
     public Guid AssetId { get; set; }

backend/src/Socialize.Api/Modules/Assets/Handlers/CreateAssetRevision.cs

@@ -3,17 +3,19 @@ using Microsoft.EntityFrameworkCore;
 using Socialize.Api.Data;
 using Socialize.Api.Infrastructure.Security;
 using Socialize.Api.Modules.Assets.Data;
+using Socialize.Api.Modules.ContentItems.Contracts;
 using Socialize.Api.Modules.ContentItems.Data;
 using Socialize.Api.Modules.Notifications.Contracts;
+using System.Text.Json;
 
 namespace Socialize.Api.Modules.Assets.Handlers;
 
-public record CreateAssetRevisionRequest(
+internal record CreateAssetRevisionRequest(
     string SourceReference,
     string? PreviewUrl,
     string? Notes);
 
-public class CreateAssetRevisionRequestValidator
+internal class CreateAssetRevisionRequestValidator
     : Validator<CreateAssetRevisionRequest>
 {
     public CreateAssetRevisionRequestValidator()
@@ -24,9 +26,10 @@ public class CreateAssetRevisionRequestValidator
     }
 }
 
-public class CreateAssetRevisionHandler(
+internal class CreateAssetRevisionHandler(
     AppDbContext dbContext,
     AccessScopeService accessScopeService,
+    IContentItemActivityWriter activityWriter,
     INotificationEventWriter notificationEventWriter)
     : Endpoint<CreateAssetRevisionRequest, AssetRevisionDto>
 {
@@ -78,6 +81,25 @@ public class CreateAssetRevisionHandler(
 
         if (contentItem is not null)
         {
+            await activityWriter.WriteAsync(
+                new ContentItemActivityWriteModel(
+                    asset.WorkspaceId,
+                    asset.ContentItemId,
+                    "asset.revision.created",
+                    "AssetRevision",
+                    revision.Id,
+                    $"A new asset revision was added to {asset.DisplayName}.",
+                    User.GetUserId(),
+                    User.GetEmail(),
+                    JsonSerializer.Serialize(new
+                    {
+                        assetId = asset.Id,
+                        revisionNumber,
+                        sourceReference = revision.SourceReference,
+                        notes = revision.Notes,
+                    })),
+                ct);
+
             await notificationEventWriter.WriteAsync(
                 new NotificationEventWriteModel(
                     asset.WorkspaceId,

backend/src/Socialize.Api/Modules/Assets/Handlers/CreateGoogleDriveAsset.cs

@@ -3,12 +3,16 @@ using Microsoft.EntityFrameworkCore;
 using Socialize.Api.Data;
 using Socialize.Api.Infrastructure.Security;
 using Socialize.Api.Modules.Assets.Data;
+using Socialize.Api.Modules.ContentItems.Contracts;
 using Socialize.Api.Modules.ContentItems.Data;
 using Socialize.Api.Modules.Notifications.Contracts;
+using Socialize.Api.Modules.Organizations.Data;
+using Socialize.Api.Modules.Workspaces.Data;
+using System.Text.Json;
 
 namespace Socialize.Api.Modules.Assets.Handlers;
 
-public record CreateGoogleDriveAssetRequest(
+internal record CreateGoogleDriveAssetRequest(
     Guid WorkspaceId,
     Guid ContentItemId,
     string AssetType,
@@ -17,7 +21,7 @@ public record CreateGoogleDriveAssetRequest(
     string GoogleDriveLink,
     string? PreviewUrl);
 
-public class CreateGoogleDriveAssetRequestValidator
+internal class CreateGoogleDriveAssetRequestValidator
     : Validator<CreateGoogleDriveAssetRequest>
 {
     public CreateGoogleDriveAssetRequestValidator()
@@ -32,9 +36,10 @@ public class CreateGoogleDriveAssetRequestValidator
     }
 }
 
-public class CreateGoogleDriveAssetHandler(
+internal class CreateGoogleDriveAssetHandler(
     AppDbContext dbContext,
     AccessScopeService accessScopeService,
+    IContentItemActivityWriter activityWriter,
     INotificationEventWriter notificationEventWriter)
     : Endpoint<CreateGoogleDriveAssetRequest, AssetDto>
 {
@@ -64,6 +69,26 @@ public class CreateGoogleDriveAssetHandler(
             return;
         }
 
+        Workspace? workspace = await dbContext.Workspaces
+            .SingleOrDefaultAsync(candidate => candidate.Id == contentItem.WorkspaceId, ct);
+        if (workspace is null)
+        {
+            await SendNotFoundAsync(ct);
+            return;
+        }
+
+        Organization? organization = await dbContext.Organizations
+            .SingleOrDefaultAsync(candidate => candidate.Id == workspace.OrganizationId, ct);
+        if (organization is null)
+        {
+            await SendNotFoundAsync(ct);
+            return;
+        }
+
+        string? workspaceFolderPath = organization.IsGoogleDriveDamEnabled
+            ? $"{organization.GoogleDriveRootFolderName}/{workspace.Slug}"
+            : null;
+
         Asset asset = new()
         {
             Id = Guid.NewGuid(),
@@ -74,6 +99,7 @@ public class CreateGoogleDriveAssetHandler(
             DisplayName = request.DisplayName.Trim(),
             GoogleDriveFileId = request.GoogleDriveFileId.Trim(),
             GoogleDriveLink = request.GoogleDriveLink.Trim(),
+            GoogleDriveWorkspaceFolderPath = workspaceFolderPath,
             PreviewUrl = string.IsNullOrWhiteSpace(request.PreviewUrl) ? null : request.PreviewUrl.Trim(),
             CurrentRevisionNumber = 1,
             CreatedAt = DateTimeOffset.UtcNow,
@@ -93,6 +119,26 @@ public class CreateGoogleDriveAssetHandler(
         dbContext.AssetRevisions.Add(revision);
         await dbContext.SaveChangesAsync(ct);
 
+        await activityWriter.WriteAsync(
+            new ContentItemActivityWriteModel(
+                asset.WorkspaceId,
+                asset.ContentItemId,
+                "asset.google-drive-linked",
+                "Asset",
+                asset.Id,
+                $"Google Drive asset {asset.DisplayName} was linked to {contentItem.Title}.",
+                User.GetUserId(),
+                User.GetEmail(),
+                JsonSerializer.Serialize(new
+                {
+                    assetType = asset.AssetType,
+                    sourceType = asset.SourceType,
+                    googleDriveFileId = asset.GoogleDriveFileId,
+                    googleDriveWorkspaceFolderPath = asset.GoogleDriveWorkspaceFolderPath,
+                    currentRevisionNumber = asset.CurrentRevisionNumber,
+                })),
+            ct);
+
         await notificationEventWriter.WriteAsync(
             new NotificationEventWriteModel(
                 asset.WorkspaceId,
@@ -115,6 +161,7 @@ public class CreateGoogleDriveAssetHandler(
             asset.DisplayName,
             asset.GoogleDriveFileId,
             asset.GoogleDriveLink,
+            asset.GoogleDriveWorkspaceFolderPath,
             asset.PreviewUrl,
             asset.CurrentRevisionNumber,
             asset.CreatedAt,

backend/src/Socialize.Api/Modules/Assets/Handlers/GetAssets.cs

@@ -5,9 +5,9 @@ using Socialize.Api.Infrastructure.Security;
 
 namespace Socialize.Api.Modules.Assets.Handlers;
 
-public record GetAssetsRequest(Guid ContentItemId);
+internal record GetAssetsRequest(Guid ContentItemId);
 
-public record AssetRevisionDto(
+internal record AssetRevisionDto(
     Guid Id,
     Guid AssetId,
     int RevisionNumber,
@@ -17,7 +17,7 @@ public record AssetRevisionDto(
     Guid? CreatedByUserId,
     DateTimeOffset CreatedAt);
 
-public record AssetDto(
+internal record AssetDto(
     Guid Id,
     Guid WorkspaceId,
     Guid ContentItemId,
@@ -26,12 +26,13 @@ public record AssetDto(
     string DisplayName,
     string? GoogleDriveFileId,
     string? GoogleDriveLink,
+    string? GoogleDriveWorkspaceFolderPath,
     string? PreviewUrl,
     int CurrentRevisionNumber,
     DateTimeOffset CreatedAt,
     IReadOnlyCollection<AssetRevisionDto> Revisions);
 
-public class GetAssetsHandler(
+internal class GetAssetsHandler(
     AppDbContext dbContext,
     AccessScopeService accessScopeService)
     : Endpoint<GetAssetsRequest, IReadOnlyCollection<AssetDto>>
@@ -70,6 +71,7 @@ public class GetAssetsHandler(
                 asset.DisplayName,
                 asset.GoogleDriveFileId,
                 asset.GoogleDriveLink,
+                asset.GoogleDriveWorkspaceFolderPath,
                 asset.PreviewUrl,
                 asset.CurrentRevisionNumber,
                 asset.CreatedAt,

backend/src/Socialize.Api/Modules/Assets/Handlers/GetWorkspaceDam.cs

@@ -0,0 +1,123 @@
+using FastEndpoints;
+using Microsoft.EntityFrameworkCore;
+using Socialize.Api.Data;
+using Socialize.Api.Infrastructure.Security;
+using Socialize.Api.Modules.Organizations.Data;
+using Socialize.Api.Modules.Workspaces.Data;
+
+namespace Socialize.Api.Modules.Assets.Handlers;
+
+internal record WorkspaceDamBackingStoreDto(
+    string Type,
+    bool IsConfigured,
+    string? RootFolderId,
+    string? RootFolderName,
+    string? RootFolderUrl);
+
+internal record WorkspaceDamFolderDto(
+    string Name,
+    string Path);
+
+internal record WorkspaceDamDto(
+    Guid WorkspaceId,
+    Guid OrganizationId,
+    string WorkspaceName,
+    string WorkspaceSlug,
+    WorkspaceDamBackingStoreDto BackingStore,
+    WorkspaceDamFolderDto? Folder,
+    IReadOnlyCollection<AssetDto> Assets);
+
+internal class GetWorkspaceDamHandler(
+    AppDbContext dbContext,
+    AccessScopeService accessScopeService)
+    : EndpointWithoutRequest<WorkspaceDamDto>
+{
+    public override void Configure()
+    {
+        Get("/api/workspaces/{workspaceId:guid}/dam");
+        Options(o => o.WithTags("Assets"));
+    }
+
+    public override async Task HandleAsync(CancellationToken ct)
+    {
+        Guid workspaceId = Route<Guid>("workspaceId");
+
+        Workspace? workspace = await dbContext.Workspaces
+            .SingleOrDefaultAsync(candidate => candidate.Id == workspaceId, ct);
+        if (workspace is null)
+        {
+            await SendNotFoundAsync(ct);
+            return;
+        }
+
+        IReadOnlyCollection<Guid> accessibleWorkspaceIds = await accessScopeService.GetAccessibleWorkspaceIdsAsync(User, ct);
+        if (!accessibleWorkspaceIds.Contains(workspace.Id))
+        {
+            await SendForbiddenAsync(ct);
+            return;
+        }
+
+        Organization? organization = await dbContext.Organizations
+            .SingleOrDefaultAsync(candidate => candidate.Id == workspace.OrganizationId, ct);
+        if (organization is null)
+        {
+            await SendNotFoundAsync(ct);
+            return;
+        }
+
+        WorkspaceDamBackingStoreDto backingStore = new(
+            organization.IsGoogleDriveDamEnabled ? "GoogleDrive" : "Unconfigured",
+            organization.IsGoogleDriveDamEnabled,
+            organization.GoogleDriveRootFolderId,
+            organization.GoogleDriveRootFolderName,
+            organization.GoogleDriveRootFolderUrl);
+
+        WorkspaceDamFolderDto? folder = organization.IsGoogleDriveDamEnabled
+            ? new WorkspaceDamFolderDto(
+                workspace.Slug,
+                $"{organization.GoogleDriveRootFolderName}/{workspace.Slug}")
+            : null;
+
+        List<AssetDto> assets = await dbContext.Assets
+            .Where(asset => asset.WorkspaceId == workspace.Id)
+            .OrderBy(asset => asset.DisplayName)
+            .Select(asset => new AssetDto(
+                asset.Id,
+                asset.WorkspaceId,
+                asset.ContentItemId,
+                asset.AssetType,
+                asset.SourceType,
+                asset.DisplayName,
+                asset.GoogleDriveFileId,
+                asset.GoogleDriveLink,
+                asset.GoogleDriveWorkspaceFolderPath,
+                asset.PreviewUrl,
+                asset.CurrentRevisionNumber,
+                asset.CreatedAt,
+                dbContext.AssetRevisions
+                    .Where(revision => revision.AssetId == asset.Id)
+                    .OrderByDescending(revision => revision.RevisionNumber)
+                    .Select(revision => new AssetRevisionDto(
+                        revision.Id,
+                        revision.AssetId,
+                        revision.RevisionNumber,
+                        revision.SourceReference,
+                        revision.PreviewUrl,
+                        revision.Notes,
+                        revision.CreatedByUserId,
+                        revision.CreatedAt))
+                    .ToList()))
+            .ToListAsync(ct);
+
+        await SendOkAsync(
+            new WorkspaceDamDto(
+                workspace.Id,
+                workspace.OrganizationId,
+                workspace.Name,
+                workspace.Slug,
+                backingStore,
+                folder,
+                assets),
+            ct);
+    }
+}

backend/src/Socialize.Api/Modules/Assets/ModuleRegistration.cs

@@ -2,7 +2,7 @@ using Socialize.Api.Modules.Assets.Data;
 
 namespace Socialize.Api.Modules.Assets;
 
-public static class DependencyInjection
+internal static class ModuleRegistration
 {
     public static WebApplicationBuilder AddAssetsModule(
         this WebApplicationBuilder builder)

backend/src/Socialize.Api/Modules/CalendarIntegrations/Data/CalendarCatalogEntry.cs

@@ -0,0 +1,18 @@
+namespace Socialize.Api.Modules.CalendarIntegrations.Data;
+
+internal class CalendarCatalogEntry
+{
+    public Guid Id { get; init; }
+    public required string Title { get; set; }
+    public required string Description { get; set; }
+    public string? Country { get; set; }
+    public string? Region { get; set; }
+    public required string Language { get; set; }
+    public required string Category { get; set; }
+    public string? CultureOrReligion { get; set; }
+    public required string ProviderName { get; set; }
+    public required string SourceUrl { get; set; }
+    public required string TrustLevel { get; set; }
+    public required string DefaultColor { get; set; }
+    public DateTimeOffset CreatedAt { get; init; }
+}

backend/src/Socialize.Api/Modules/CalendarIntegrations/Data/CalendarCatalogSeed.cs

@@ -0,0 +1,55 @@
+namespace Socialize.Api.Modules.CalendarIntegrations.Data;
+
+#pragma warning disable S1075 // Catalog seed entries intentionally store source URLs.
+
+internal static class CalendarCatalogSeed
+{
+    public static readonly CalendarCatalogEntry[] Entries =
+    [
+        new()
+        {
+            Id = Guid.Parse("10000000-0000-0000-0000-000000000001"),
+            Title = "United States Public Holidays",
+            Description = "Federal public holiday calendar for the United States.",
+            Country = "US",
+            Region = null,
+            Language = "en",
+            Category = "public-holiday",
+            CultureOrReligion = null,
+            ProviderName = "Nager.Date",
+            SourceUrl = "https://date.nager.at/api/v3/PublicHolidays/2026/US",
+            TrustLevel = "Verified",
+            DefaultColor = "#2F80ED",
+        },
+        new()
+        {
+            Id = Guid.Parse("10000000-0000-0000-0000-000000000002"),
+            Title = "Canada Public Holidays",
+            Description = "Public holiday calendar for Canada.",
+            Country = "CA",
+            Region = null,
+            Language = "en",
+            Category = "public-holiday",
+            CultureOrReligion = null,
+            ProviderName = "Nager.Date",
+            SourceUrl = "https://date.nager.at/api/v3/PublicHolidays/2026/CA",
+            TrustLevel = "Verified",
+            DefaultColor = "#2F80ED",
+        },
+        new()
+        {
+            Id = Guid.Parse("10000000-0000-0000-0000-000000000003"),
+            Title = "Common Marketing Moments",
+            Description = "Common retail, awareness, and social planning moments.",
+            Country = null,
+            Region = null,
+            Language = "en",
+            Category = "marketing-moment",
+            CultureOrReligion = null,
+            ProviderName = "Socialize",
+            SourceUrl = "https://example.com/socialize/marketing-moments.ics",
+            TrustLevel = "Maintained",
+            DefaultColor = "#9B51E0",
+        },
+    ];
+}

backend/src/Socialize.Api/Modules/CalendarIntegrations/Data/CalendarEvent.cs

@@ -0,0 +1,24 @@
+namespace Socialize.Api.Modules.CalendarIntegrations.Data;
+
+internal class CalendarEvent
+{
+    public Guid Id { get; init; }
+    public Guid CalendarSourceId { get; set; }
+    public required string SourceEventUid { get; set; }
+    public required string Title { get; set; }
+    public string? Description { get; set; }
+    public bool IsAllDay { get; set; }
+    public bool IsFloatingTime { get; set; }
+    public DateOnly StartDate { get; set; }
+    public DateOnly EndDate { get; set; }
+    public DateTime? StartLocalDateTime { get; set; }
+    public DateTime? EndLocalDateTime { get; set; }
+    public DateTimeOffset? StartUtc { get; set; }
+    public DateTimeOffset? EndUtc { get; set; }
+    public string? TimeZoneId { get; set; }
+    public string? RecurrenceId { get; set; }
+    public string? Location { get; set; }
+    public string? SourceUrl { get; set; }
+    public DateTimeOffset? SourceLastModifiedAt { get; set; }
+    public DateTimeOffset ImportedAt { get; set; }
+}

backend/src/Socialize.Api/Modules/CalendarIntegrations/Data/CalendarSource.cs

@@ -0,0 +1,22 @@
+namespace Socialize.Api.Modules.CalendarIntegrations.Data;
+
+internal class CalendarSource
+{
+    public Guid Id { get; init; }
+    public required string Scope { get; set; }
+    public Guid? OrganizationId { get; set; }
+    public Guid? WorkspaceId { get; set; }
+    public Guid? UserId { get; set; }
+    public string? SourceUrl { get; set; }
+    public string? CatalogSourceReference { get; set; }
+    public required string DisplayTitle { get; set; }
+    public required string Color { get; set; }
+    public required string Category { get; set; }
+    public bool IsEnabled { get; set; } = true;
+    public string? InheritanceMode { get; set; }
+    public DateTimeOffset? LastSuccessfulSyncAt { get; set; }
+    public DateTimeOffset? LastAttemptedSyncAt { get; set; }
+    public string? LastSyncError { get; set; }
+    public DateTimeOffset CreatedAt { get; init; }
+    public DateTimeOffset UpdatedAt { get; set; }
+}

backend/src/Socialize.Api/Modules/CalendarIntegrations/Data/CalendarSourceModelConfiguration.cs

@@ -0,0 +1,95 @@
+using Microsoft.EntityFrameworkCore;
+
+namespace Socialize.Api.Modules.CalendarIntegrations.Data;
+
+internal static class CalendarSourceModelConfiguration
+{
+    public static ModelBuilder ConfigureCalendarIntegrationsModule(this ModelBuilder modelBuilder)
+    {
+        modelBuilder.Entity<CalendarSource>(source =>
+        {
+            source.ToTable("CalendarSources");
+            source.HasKey(x => x.Id);
+            source.Property(x => x.Scope).HasMaxLength(32).IsRequired();
+            source.Property(x => x.SourceUrl).HasMaxLength(2048);
+            source.Property(x => x.CatalogSourceReference).HasMaxLength(256);
+            source.Property(x => x.DisplayTitle).HasMaxLength(256).IsRequired();
+            source.Property(x => x.Color).HasMaxLength(16).IsRequired();
+            source.Property(x => x.Category).HasMaxLength(64).IsRequired();
+            source.Property(x => x.InheritanceMode).HasMaxLength(32);
+            source.Property(x => x.LastSyncError).HasMaxLength(2048);
+            source.Property(x => x.CreatedAt)
+                .ValueGeneratedOnAdd()
+                .HasDefaultValueSql("CURRENT_TIMESTAMP");
+            source.Property(x => x.UpdatedAt)
+                .ValueGeneratedOnAdd()
+                .HasDefaultValueSql("CURRENT_TIMESTAMP");
+
+            source.HasIndex(x => x.Scope);
+            source.HasIndex(x => x.OrganizationId);
+            source.HasIndex(x => x.WorkspaceId);
+            source.HasIndex(x => x.UserId);
+        });
+
+        modelBuilder.Entity<CalendarCatalogEntry>(entry =>
+        {
+            entry.ToTable("CalendarCatalogEntries");
+            entry.HasKey(x => x.Id);
+            entry.Property(x => x.Title).HasMaxLength(256).IsRequired();
+            entry.Property(x => x.Description).HasMaxLength(1024).IsRequired();
+            entry.Property(x => x.Country).HasMaxLength(2);
+            entry.Property(x => x.Region).HasMaxLength(128);
+            entry.Property(x => x.Language).HasMaxLength(16).IsRequired();
+            entry.Property(x => x.Category).HasMaxLength(64).IsRequired();
+            entry.Property(x => x.CultureOrReligion).HasMaxLength(128);
+            entry.Property(x => x.ProviderName).HasMaxLength(128).IsRequired();
+            entry.Property(x => x.SourceUrl).HasMaxLength(2048).IsRequired();
+            entry.Property(x => x.TrustLevel).HasMaxLength(64).IsRequired();
+            entry.Property(x => x.DefaultColor).HasMaxLength(16).IsRequired();
+            entry.Property(x => x.CreatedAt)
+                .ValueGeneratedOnAdd()
+                .HasDefaultValueSql("CURRENT_TIMESTAMP");
+            entry.HasIndex(x => x.Country);
+            entry.HasIndex(x => x.Category);
+            entry.HasIndex(x => x.ProviderName);
+            entry.HasData(CalendarCatalogSeed.Entries);
+        });
+
+        modelBuilder.Entity<CalendarEvent>(calendarEvent =>
+        {
+            calendarEvent.ToTable("CalendarEvents");
+            calendarEvent.HasKey(x => x.Id);
+            calendarEvent.Property(x => x.SourceEventUid).HasMaxLength(512).IsRequired();
+            calendarEvent.Property(x => x.Title).HasMaxLength(512).IsRequired();
+            calendarEvent.Property(x => x.Description).HasMaxLength(4000);
+            calendarEvent.Property(x => x.TimeZoneId).HasMaxLength(128);
+            calendarEvent.Property(x => x.RecurrenceId).HasMaxLength(512);
+            calendarEvent.Property(x => x.Location).HasMaxLength(512);
+            calendarEvent.Property(x => x.SourceUrl).HasMaxLength(2048);
+            calendarEvent.HasIndex(x => x.CalendarSourceId);
+            calendarEvent.HasIndex(x => new { x.CalendarSourceId, x.SourceEventUid, x.StartDate }).IsUnique();
+            calendarEvent.HasOne<CalendarSource>()
+                .WithMany()
+                .HasForeignKey(x => x.CalendarSourceId)
+                .OnDelete(DeleteBehavior.Cascade);
+        });
+
+        modelBuilder.Entity<UserCalendarExportFeed>(feed =>
+        {
+            feed.ToTable("UserCalendarExportFeeds");
+            feed.HasKey(x => x.Id);
+            feed.Property(x => x.Token).HasMaxLength(96);
+            feed.Property(x => x.TokenHash).HasMaxLength(64);
+            feed.Property(x => x.CreatedAt)
+                .ValueGeneratedOnAdd()
+                .HasDefaultValueSql("CURRENT_TIMESTAMP");
+            feed.Property(x => x.UpdatedAt)
+                .ValueGeneratedOnAdd()
+                .HasDefaultValueSql("CURRENT_TIMESTAMP");
+            feed.HasIndex(x => x.UserId).IsUnique();
+            feed.HasIndex(x => x.TokenHash).IsUnique();
+        });
+
+        return modelBuilder;
+    }
+}

backend/src/Socialize.Api/Modules/CalendarIntegrations/Data/UserCalendarExportFeed.cs

@@ -0,0 +1,12 @@
+namespace Socialize.Api.Modules.CalendarIntegrations.Data;
+
+internal class UserCalendarExportFeed
+{
+    public Guid Id { get; init; }
+    public Guid UserId { get; set; }
+    public string? Token { get; set; }
+    public string? TokenHash { get; set; }
+    public DateTimeOffset CreatedAt { get; init; }
+    public DateTimeOffset UpdatedAt { get; set; }
+    public DateTimeOffset? RevokedAt { get; set; }
+}

backend/src/Socialize.Api/Modules/CalendarIntegrations/Handlers/CalendarSourceDtos.cs

@@ -0,0 +1,112 @@
+using Socialize.Api.Modules.CalendarIntegrations.Data;
+using Socialize.Api.Modules.CalendarIntegrations.Services;
+
+namespace Socialize.Api.Modules.CalendarIntegrations.Handlers;
+
+internal record CalendarSourceDto(
+    Guid Id,
+    string Scope,
+    Guid? OrganizationId,
+    Guid? WorkspaceId,
+    Guid? UserId,
+    string? SourceUrl,
+    string? CatalogSourceReference,
+    string DisplayTitle,
+    string Color,
+    string Category,
+    bool IsEnabled,
+    string? InheritanceMode,
+    bool IsReadOnly,
+    DateTimeOffset? LastSuccessfulSyncAt,
+    DateTimeOffset? LastAttemptedSyncAt,
+    string? LastSyncError,
+    DateTimeOffset CreatedAt,
+    DateTimeOffset UpdatedAt)
+{
+    public static CalendarSourceDto FromSource(CalendarSource source, bool isReadOnly)
+    {
+        return new CalendarSourceDto(
+            source.Id,
+            source.Scope,
+            source.OrganizationId,
+            source.WorkspaceId,
+            source.UserId,
+            source.SourceUrl,
+            source.CatalogSourceReference,
+            source.DisplayTitle,
+            source.Color,
+            source.Category,
+            source.IsEnabled,
+            source.InheritanceMode,
+            isReadOnly,
+            source.LastSuccessfulSyncAt,
+            source.LastAttemptedSyncAt,
+            source.LastSyncError,
+            source.CreatedAt,
+            source.UpdatedAt);
+    }
+}
+
+internal record UpsertCalendarSourceRequest(
+    string Scope,
+    Guid? OrganizationId,
+    Guid? WorkspaceId,
+    string? SourceUrl,
+    string? CatalogSourceReference,
+    string DisplayTitle,
+    string Color,
+    string Category,
+    bool IsEnabled,
+    string? InheritanceMode);
+
+internal class UpsertCalendarSourceRequestValidator
+    : FastEndpoints.Validator<UpsertCalendarSourceRequest>
+{
+    public UpsertCalendarSourceRequestValidator()
+    {
+        RuleFor(x => x.Scope)
+            .NotEmpty()
+            .Must(CalendarSourceRules.IsSupportedScope)
+            .WithMessage("A valid calendar source scope should be specified.");
+
+        RuleFor(x => x.DisplayTitle).NotEmpty().MaximumLength(256);
+        RuleFor(x => x.Category).NotEmpty().MaximumLength(64);
+        RuleFor(x => x.Color)
+            .NotEmpty()
+            .Matches("^#[0-9A-Fa-f]{6}$")
+            .WithMessage("Color should be a six digit hex color, for example #2F80ED.");
+
+        RuleFor(x => x.SourceUrl)
+            .MaximumLength(2048)
+            .Must(value => string.IsNullOrWhiteSpace(value) || Uri.TryCreate(value, UriKind.Absolute, out Uri? uri) &&
+                (uri.Scheme == Uri.UriSchemeHttp || uri.Scheme == Uri.UriSchemeHttps))
+            .WithMessage("Source URL should be an absolute HTTP or HTTPS URL.");
+
+        RuleFor(x => x.CatalogSourceReference).MaximumLength(256);
+
+        RuleFor(x => x)
+            .Must(x => !string.IsNullOrWhiteSpace(x.SourceUrl) || !string.IsNullOrWhiteSpace(x.CatalogSourceReference))
+            .WithMessage("A source URL or catalog source reference should be specified.");
+
+        RuleFor(x => x)
+            .Must(x => x.Scope != CalendarSourceScopes.Organization || x.OrganizationId.HasValue)
+            .WithMessage("Organization calendar sources require an organization id.");
+
+        RuleFor(x => x)
+            .Must(x => x.Scope != CalendarSourceScopes.Workspace || x.WorkspaceId.HasValue)
+            .WithMessage("Workspace calendar sources require a workspace id.");
+
+        RuleFor(x => x)
+            .Must(x => x.Scope != CalendarSourceScopes.User || (!x.OrganizationId.HasValue && !x.WorkspaceId.HasValue))
+            .WithMessage("User calendar sources should not include organization or workspace ids.");
+
+        RuleFor(x => x)
+            .Must(x => x.Scope == CalendarSourceScopes.Organization ||
+                (!x.OrganizationId.HasValue && string.IsNullOrWhiteSpace(x.InheritanceMode)))
+            .WithMessage("Only organization calendar sources can set organization ids or inheritance modes.");
+
+        RuleFor(x => x.InheritanceMode)
+            .Must(value => string.IsNullOrWhiteSpace(value) || CalendarSourceRules.IsSupportedInheritanceMode(value))
+            .WithMessage("A valid inheritance mode should be specified.");
+    }
+}

backend/src/Socialize.Api/Modules/CalendarIntegrations/Handlers/CreateCalendarSource.cs

@@ -0,0 +1,132 @@
+using FastEndpoints;
+using Microsoft.EntityFrameworkCore;
+using Socialize.Api.Data;
+using Socialize.Api.Infrastructure.Security;
+using Socialize.Api.Modules.CalendarIntegrations.Data;
+using Socialize.Api.Modules.CalendarIntegrations.Services;
+using Socialize.Api.Modules.Organizations.Services;
+
+namespace Socialize.Api.Modules.CalendarIntegrations.Handlers;
+
+internal class CreateCalendarSourceHandler(
+    AppDbContext dbContext,
+    AccessScopeService accessScopeService,
+    OrganizationAccessService organizationAccessService)
+    : Endpoint<UpsertCalendarSourceRequest, CalendarSourceDto>
+{
+    public override void Configure()
+    {
+        Post("/api/calendar-integrations/sources");
+        Options(o => o.WithTags("Calendar Integrations"));
+    }
+
+    public override async Task HandleAsync(UpsertCalendarSourceRequest request, CancellationToken ct)
+    {
+        ArgumentNullException.ThrowIfNull(request);
+
+        Guid currentUserId = User.GetUserId();
+        string scope = request.Scope.Trim();
+        Guid? organizationId = request.OrganizationId;
+        Guid? workspaceId = request.WorkspaceId;
+
+        if (!await CanCreateAsync(scope, organizationId, workspaceId, currentUserId, ct))
+        {
+            await SendForbiddenAsync(ct);
+            return;
+        }
+
+        string? sourceUrl = NormalizeOptional(request.SourceUrl);
+        string? catalogSourceReference = NormalizeOptional(request.CatalogSourceReference);
+        if (await SourceAlreadyExistsAsync(scope, organizationId, workspaceId, currentUserId, sourceUrl, catalogSourceReference, ct))
+        {
+            AddError(request => request.SourceUrl, "This calendar source has already been added.");
+            await SendErrorsAsync(cancellation: ct);
+            return;
+        }
+
+        CalendarSource source = new()
+        {
+            Id = Guid.NewGuid(),
+            Scope = scope,
+            OrganizationId = scope == CalendarSourceScopes.Organization ? organizationId : null,
+            WorkspaceId = scope == CalendarSourceScopes.Workspace ? workspaceId : null,
+            UserId = scope == CalendarSourceScopes.User ? currentUserId : null,
+            SourceUrl = sourceUrl,
+            CatalogSourceReference = catalogSourceReference,
+            DisplayTitle = request.DisplayTitle.Trim(),
+            Color = request.Color.Trim(),
+            Category = request.Category.Trim(),
+            IsEnabled = request.IsEnabled,
+            InheritanceMode = scope == CalendarSourceScopes.Organization
+                ? NormalizeOptional(request.InheritanceMode) ?? CalendarSourceInheritanceModes.Optional
+                : null,
+            UpdatedAt = DateTimeOffset.UtcNow,
+        };
+
+        dbContext.CalendarSources.Add(source);
+        await dbContext.SaveChangesAsync(ct);
+
+        await SendAsync(CalendarSourceDto.FromSource(source, isReadOnly: false), StatusCodes.Status201Created, ct);
+    }
+
+    private async Task<bool> CanCreateAsync(
+        string scope,
+        Guid? organizationId,
+        Guid? workspaceId,
+        Guid currentUserId,
+        CancellationToken ct)
+    {
+        return scope switch
+        {
+            CalendarSourceScopes.Organization when organizationId.HasValue =>
+                await dbContext.Organizations.AnyAsync(organization => organization.Id == organizationId.Value, ct) &&
+                await organizationAccessService.HasOrganizationPermissionAsync(
+                    User,
+                    organizationId.Value,
+                    OrganizationPermissions.ManageConnectors,
+                    ct),
+            CalendarSourceScopes.Workspace when workspaceId.HasValue =>
+                await dbContext.Workspaces.AnyAsync(workspace => workspace.Id == workspaceId.Value, ct) &&
+                await accessScopeService.CanManageWorkspaceAsync(User, workspaceId.Value, ct),
+            CalendarSourceScopes.User => currentUserId != Guid.Empty,
+            _ => false,
+        };
+    }
+
+    private Task<bool> SourceAlreadyExistsAsync(
+        string scope,
+        Guid? organizationId,
+        Guid? workspaceId,
+        Guid currentUserId,
+        string? sourceUrl,
+        string? catalogSourceReference,
+        CancellationToken ct)
+    {
+        IQueryable<CalendarSource> query = dbContext.CalendarSources
+            .Where(source => source.Scope == scope);
+
+        query = scope switch
+        {
+            CalendarSourceScopes.Organization => query.Where(source => source.OrganizationId == organizationId),
+            CalendarSourceScopes.Workspace => query.Where(source => source.WorkspaceId == workspaceId),
+            CalendarSourceScopes.User => query.Where(source => source.UserId == currentUserId),
+            _ => query.Where(_ => false),
+        };
+
+        string? normalizedUrl = sourceUrl?.Trim();
+        string? normalizedCatalogReference = catalogSourceReference?.Trim();
+
+        return query.AnyAsync(source =>
+            (!string.IsNullOrWhiteSpace(normalizedCatalogReference) &&
+             source.CatalogSourceReference == normalizedCatalogReference) ||
+            (!string.IsNullOrWhiteSpace(normalizedUrl) &&
+             source.SourceUrl != null &&
+             EF.Functions.ILike(source.SourceUrl, normalizedUrl)),
+            ct);
+    }
+
+    private static string? NormalizeOptional(string? value)
+    {
+        return string.IsNullOrWhiteSpace(value) ? null : value.Trim();
+    }
+}

backend/src/Socialize.Api/Modules/CalendarIntegrations/Handlers/DeleteCalendarSource.cs

@@ -0,0 +1,64 @@
+using FastEndpoints;
+using Microsoft.EntityFrameworkCore;
+using Socialize.Api.Data;
+using Socialize.Api.Infrastructure.Security;
+using Socialize.Api.Modules.CalendarIntegrations.Data;
+using Socialize.Api.Modules.CalendarIntegrations.Services;
+using Socialize.Api.Modules.Organizations.Services;
+
+namespace Socialize.Api.Modules.CalendarIntegrations.Handlers;
+
+internal class DeleteCalendarSourceHandler(
+    AppDbContext dbContext,
+    AccessScopeService accessScopeService,
+    OrganizationAccessService organizationAccessService)
+    : EndpointWithoutRequest
+{
+    public override void Configure()
+    {
+        Delete("/api/calendar-integrations/sources/{sourceId:guid}");
+        Options(o => o.WithTags("Calendar Integrations"));
+    }
+
+    public override async Task HandleAsync(CancellationToken ct)
+    {
+        Guid sourceId = Route<Guid>("sourceId");
+        CalendarSource? source = await dbContext.CalendarSources.SingleOrDefaultAsync(candidate => candidate.Id == sourceId, ct);
+        if (source is null)
+        {
+            await SendNotFoundAsync(ct);
+            return;
+        }
+
+        if (!await CanManageExistingSourceAsync(source, User.GetUserId(), ct))
+        {
+            await SendForbiddenAsync(ct);
+            return;
+        }
+
+        dbContext.CalendarSources.Remove(source);
+        await dbContext.SaveChangesAsync(ct);
+
+        await SendNoContentAsync(ct);
+    }
+
+    private async Task<bool> CanManageExistingSourceAsync(
+        CalendarSource source,
+        Guid currentUserId,
+        CancellationToken ct)
+    {
+        return source.Scope switch
+        {
+            CalendarSourceScopes.Organization when source.OrganizationId.HasValue =>
+                await organizationAccessService.HasOrganizationPermissionAsync(
+                    User,
+                    source.OrganizationId.Value,
+                    OrganizationPermissions.ManageConnectors,
+                    ct),
+            CalendarSourceScopes.Workspace when source.WorkspaceId.HasValue =>
+                await accessScopeService.CanManageWorkspaceAsync(User, source.WorkspaceId.Value, ct),
+            CalendarSourceScopes.User => source.UserId == currentUserId,
+            _ => false,
+        };
+    }
+}

backend/src/Socialize.Api/Modules/CalendarIntegrations/Handlers/ListCalendarCatalog.cs

@@ -0,0 +1,115 @@
+using FastEndpoints;
+using Microsoft.EntityFrameworkCore;
+using Socialize.Api.Data;
+using Socialize.Api.Modules.CalendarIntegrations.Data;
+
+namespace Socialize.Api.Modules.CalendarIntegrations.Handlers;
+
+internal sealed class ListCalendarCatalogRequest
+{
+    public string? Search { get; set; }
+    public string? Country { get; set; }
+    public string? Region { get; set; }
+    public string? Language { get; set; }
+    public string? Category { get; set; }
+    public string? CultureOrReligion { get; set; }
+    public string? Provider { get; set; }
+}
+
+internal record CalendarCatalogEntryDto(
+    Guid Id,
+    string Title,
+    string Description,
+    string? Country,
+    string? Region,
+    string Language,
+    string Category,
+    string? CultureOrReligion,
+    string ProviderName,
+    string SourceUrl,
+    string TrustLevel,
+    string DefaultColor);
+
+internal class ListCalendarCatalogHandler(AppDbContext dbContext)
+    : Endpoint<ListCalendarCatalogRequest, IReadOnlyCollection<CalendarCatalogEntryDto>>
+{
+    public override void Configure()
+    {
+        Get("/api/calendar-integrations/catalog");
+        Options(o => o.WithTags("Calendar Integrations"));
+    }
+
+    public override async Task HandleAsync(ListCalendarCatalogRequest request, CancellationToken ct)
+    {
+        ArgumentNullException.ThrowIfNull(request);
+
+        IQueryable<CalendarCatalogEntry> query = dbContext.CalendarCatalogEntries.AsQueryable();
+
+        if (!string.IsNullOrWhiteSpace(request.Search))
+        {
+            string search = $"%{request.Search.Trim()}%";
+            query = query.Where(entry =>
+                EF.Functions.ILike(entry.Title, search) ||
+                EF.Functions.ILike(entry.Description, search) ||
+                EF.Functions.ILike(entry.ProviderName, search));
+        }
+
+        if (!string.IsNullOrWhiteSpace(request.Country))
+        {
+            string country = request.Country.Trim().ToUpperInvariant();
+            query = query.Where(entry => entry.Country == country);
+        }
+
+        if (!string.IsNullOrWhiteSpace(request.Region))
+        {
+            string region = request.Region.Trim();
+            query = query.Where(entry => entry.Region == region);
+        }
+
+        if (!string.IsNullOrWhiteSpace(request.Language))
+        {
+            string language = request.Language.Trim();
+            query = query.Where(entry => entry.Language == language);
+        }
+
+        if (!string.IsNullOrWhiteSpace(request.Category))
+        {
+            string category = request.Category.Trim();
+            query = query.Where(entry => entry.Category == category);
+        }
+
+        if (!string.IsNullOrWhiteSpace(request.CultureOrReligion))
+        {
+            string cultureOrReligion = request.CultureOrReligion.Trim();
+            query = query.Where(entry => entry.CultureOrReligion == cultureOrReligion);
+        }
+
+        if (!string.IsNullOrWhiteSpace(request.Provider))
+        {
+            string provider = request.Provider.Trim();
+            query = query.Where(entry => entry.ProviderName == provider);
+        }
+
+        CalendarCatalogEntryDto[] entries = await query
+            .OrderBy(entry => entry.Country)
+            .ThenBy(entry => entry.Category)
+            .ThenBy(entry => entry.Title)
+            .Take(100)
+            .Select(entry => new CalendarCatalogEntryDto(
+                entry.Id,
+                entry.Title,
+                entry.Description,
+                entry.Country,
+                entry.Region,
+                entry.Language,
+                entry.Category,
+                entry.CultureOrReligion,
+                entry.ProviderName,
+                entry.SourceUrl,
+                entry.TrustLevel,
+                entry.DefaultColor))
+            .ToArrayAsync(ct);
+
+        await SendOkAsync(entries, ct);
+    }
+}

backend/src/Socialize.Api/Modules/CalendarIntegrations/Handlers/ListCalendarEvents.cs

@@ -0,0 +1,133 @@
+using FastEndpoints;
+using Microsoft.EntityFrameworkCore;
+using Socialize.Api.Data;
+using Socialize.Api.Infrastructure.Security;
+using Socialize.Api.Modules.CalendarIntegrations.Data;
+using Socialize.Api.Modules.CalendarIntegrations.Services;
+
+namespace Socialize.Api.Modules.CalendarIntegrations.Handlers;
+
+internal sealed class ListCalendarEventsRequest
+{
+    public Guid? WorkspaceId { get; set; }
+    public DateOnly? StartDate { get; set; }
+    public DateOnly? EndDate { get; set; }
+}
+
+internal record CalendarEventDto(
+    Guid Id,
+    Guid CalendarSourceId,
+    string SourceEventUid,
+    string Title,
+    string? Description,
+    bool IsAllDay,
+    bool IsFloatingTime,
+    DateOnly StartDate,
+    DateOnly EndDate,
+    DateTime? StartLocalDateTime,
+    DateTime? EndLocalDateTime,
+    DateTimeOffset? StartUtc,
+    DateTimeOffset? EndUtc,
+    string? TimeZoneId,
+    string? RecurrenceId,
+    string? Location,
+    string? SourceUrl,
+    DateTimeOffset? SourceLastModifiedAt,
+    DateTimeOffset ImportedAt);
+
+internal class ListCalendarEventsHandler(
+    AppDbContext dbContext,
+    AccessScopeService accessScopeService)
+    : Endpoint<ListCalendarEventsRequest, IReadOnlyCollection<CalendarEventDto>>
+{
+    public override void Configure()
+    {
+        Get("/api/calendar-integrations/events");
+        Options(o => o.WithTags("Calendar Integrations"));
+    }
+
+    public override async Task HandleAsync(ListCalendarEventsRequest request, CancellationToken ct)
+    {
+        ArgumentNullException.ThrowIfNull(request);
+
+        Guid currentUserId = User.GetUserId();
+        DateOnly startDate = request.StartDate ?? DateOnly.FromDateTime(DateTime.UtcNow.Date.AddMonths(-1));
+        DateOnly endDate = request.EndDate ?? DateOnly.FromDateTime(DateTime.UtcNow.Date.AddMonths(3));
+
+        if (request.WorkspaceId.HasValue &&
+            !await accessScopeService.CanAccessWorkspaceAsync(User, request.WorkspaceId.Value, ct))
+        {
+            await SendForbiddenAsync(ct);
+            return;
+        }
+
+        IQueryable<CalendarSource> visibleSources = dbContext.CalendarSources
+            .Where(source => source.IsEnabled);
+
+        if (request.WorkspaceId.HasValue)
+        {
+            Guid? organizationId = await dbContext.Workspaces
+                .Where(workspace => workspace.Id == request.WorkspaceId.Value)
+                .Select(workspace => (Guid?)workspace.OrganizationId)
+                .SingleOrDefaultAsync(ct);
+
+            if (!organizationId.HasValue)
+            {
+                await SendNotFoundAsync(ct);
+                return;
+            }
+
+            visibleSources = visibleSources.Where(source =>
+                source.Scope == CalendarSourceScopes.Organization && source.OrganizationId == organizationId ||
+                source.Scope == CalendarSourceScopes.Workspace && source.WorkspaceId == request.WorkspaceId ||
+                source.Scope == CalendarSourceScopes.User && source.UserId == currentUserId);
+        }
+        else
+        {
+            IReadOnlyCollection<Guid> workspaceIds = await accessScopeService.GetAccessibleWorkspaceIdsAsync(User, ct);
+            Guid[] organizationIds = await dbContext.Workspaces
+                .Where(workspace => workspaceIds.Contains(workspace.Id))
+                .Select(workspace => workspace.OrganizationId)
+                .Distinct()
+                .ToArrayAsync(ct);
+
+            visibleSources = visibleSources.Where(source =>
+                source.Scope == CalendarSourceScopes.Organization && source.OrganizationId.HasValue && organizationIds.Contains(source.OrganizationId.Value) ||
+                source.Scope == CalendarSourceScopes.Workspace && source.WorkspaceId.HasValue && workspaceIds.Contains(source.WorkspaceId.Value) ||
+                source.Scope == CalendarSourceScopes.User && source.UserId == currentUserId);
+        }
+
+        Guid[] sourceIds = await visibleSources
+            .Select(source => source.Id)
+            .ToArrayAsync(ct);
+
+        CalendarEventDto[] events = await dbContext.CalendarEvents
+            .Where(calendarEvent => sourceIds.Contains(calendarEvent.CalendarSourceId))
+            .Where(calendarEvent => calendarEvent.StartDate <= endDate && calendarEvent.EndDate >= startDate)
+            .OrderBy(calendarEvent => calendarEvent.StartDate)
+            .ThenBy(calendarEvent => calendarEvent.Title)
+            .Select(calendarEvent => new CalendarEventDto(
+                calendarEvent.Id,
+                calendarEvent.CalendarSourceId,
+                calendarEvent.SourceEventUid,
+                calendarEvent.Title,
+                calendarEvent.Description,
+                calendarEvent.IsAllDay,
+                calendarEvent.IsFloatingTime,
+                calendarEvent.StartDate,
+                calendarEvent.EndDate,
+                calendarEvent.StartLocalDateTime,
+                calendarEvent.EndLocalDateTime,
+                calendarEvent.StartUtc,
+                calendarEvent.EndUtc,
+                calendarEvent.TimeZoneId,
+                calendarEvent.RecurrenceId,
+                calendarEvent.Location,
+                calendarEvent.SourceUrl,
+                calendarEvent.SourceLastModifiedAt,
+                calendarEvent.ImportedAt))
+            .ToArrayAsync(ct);
+
+        await SendOkAsync(events, ct);
+    }
+}

backend/src/Socialize.Api/Modules/CalendarIntegrations/Handlers/ListCalendarSources.cs

@@ -0,0 +1,77 @@
+using FastEndpoints;
+using Microsoft.EntityFrameworkCore;
+using Socialize.Api.Data;
+using Socialize.Api.Infrastructure.Security;
+using Socialize.Api.Modules.CalendarIntegrations.Data;
+using Socialize.Api.Modules.CalendarIntegrations.Services;
+
+namespace Socialize.Api.Modules.CalendarIntegrations.Handlers;
+
+internal record ListCalendarSourcesRequest(Guid? WorkspaceId);
+
+internal class ListCalendarSourcesHandler(
+    AppDbContext dbContext,
+    AccessScopeService accessScopeService)
+    : Endpoint<ListCalendarSourcesRequest, IReadOnlyCollection<CalendarSourceDto>>
+{
+    public override void Configure()
+    {
+        Get("/api/calendar-integrations/sources");
+        Options(o => o.WithTags("Calendar Integrations"));
+    }
+
+    public override async Task HandleAsync(ListCalendarSourcesRequest request, CancellationToken ct)
+    {
+        ArgumentNullException.ThrowIfNull(request);
+
+        Guid currentUserId = User.GetUserId();
+        List<CalendarSource> sources;
+
+        if (request.WorkspaceId.HasValue)
+        {
+            var workspace = await dbContext.Workspaces
+                .Where(candidate => candidate.Id == request.WorkspaceId.Value)
+                .Select(candidate => new { candidate.Id, candidate.OrganizationId })
+                .SingleOrDefaultAsync(ct);
+
+            if (workspace is null)
+            {
+                await SendNotFoundAsync(ct);
+                return;
+            }
+
+            if (!await accessScopeService.CanAccessWorkspaceAsync(User, workspace.Id, ct))
+            {
+                await SendForbiddenAsync(ct);
+                return;
+            }
+
+            sources = await dbContext.CalendarSources
+                .Where(source =>
+                    source.Scope == CalendarSourceScopes.Organization && source.OrganizationId == workspace.OrganizationId ||
+                    source.Scope == CalendarSourceScopes.Workspace && source.WorkspaceId == workspace.Id ||
+                    source.Scope == CalendarSourceScopes.User && source.UserId == currentUserId)
+                .OrderBy(source => source.Scope)
+                .ThenBy(source => source.DisplayTitle)
+                .ToListAsync(ct);
+
+            await SendOkAsync(
+                sources
+                    .Select(source => CalendarSourceDto.FromSource(
+                        source,
+                        CalendarSourceRules.IsInheritedOrganizationSource(source, workspace.OrganizationId)))
+                    .ToArray(),
+                ct);
+            return;
+        }
+
+        sources = await dbContext.CalendarSources
+            .Where(source => source.Scope == CalendarSourceScopes.User && source.UserId == currentUserId)
+            .OrderBy(source => source.DisplayTitle)
+            .ToListAsync(ct);
+
+        await SendOkAsync(
+            sources.Select(source => CalendarSourceDto.FromSource(source, isReadOnly: false)).ToArray(),
+            ct);
+    }
+}

backend/src/Socialize.Api/Modules/CalendarIntegrations/Handlers/RefreshCalendarSource.cs

@@ -0,0 +1,65 @@
+using FastEndpoints;
+using Microsoft.EntityFrameworkCore;
+using Socialize.Api.Data;
+using Socialize.Api.Infrastructure.Security;
+using Socialize.Api.Modules.CalendarIntegrations.Data;
+using Socialize.Api.Modules.CalendarIntegrations.Services;
+using Socialize.Api.Modules.Organizations.Services;
+
+namespace Socialize.Api.Modules.CalendarIntegrations.Handlers;
+
+internal class RefreshCalendarSourceHandler(
+    AppDbContext dbContext,
+    AccessScopeService accessScopeService,
+    OrganizationAccessService organizationAccessService,
+    CalendarImportSyncService syncService)
+    : EndpointWithoutRequest<CalendarSourceDto>
+{
+    public override void Configure()
+    {
+        Post("/api/calendar-integrations/sources/{sourceId:guid}/refresh");
+        Options(o => o.WithTags("Calendar Integrations"));
+    }
+
+    public override async Task HandleAsync(CancellationToken ct)
+    {
+        Guid sourceId = Route<Guid>("sourceId");
+        CalendarSource? source = await dbContext.CalendarSources.SingleOrDefaultAsync(candidate => candidate.Id == sourceId, ct);
+        if (source is null)
+        {
+            await SendNotFoundAsync(ct);
+            return;
+        }
+
+        if (!await CanManageExistingSourceAsync(source, User.GetUserId(), ct))
+        {
+            await SendForbiddenAsync(ct);
+            return;
+        }
+
+        await syncService.RefreshSourceAsync(source.Id, ct);
+        await dbContext.Entry(source).ReloadAsync(ct);
+
+        await SendOkAsync(CalendarSourceDto.FromSource(source, isReadOnly: false), ct);
+    }
+
+    private async Task<bool> CanManageExistingSourceAsync(
+        CalendarSource source,
+        Guid currentUserId,
+        CancellationToken ct)
+    {
+        return source.Scope switch
+        {
+            CalendarSourceScopes.Organization when source.OrganizationId.HasValue =>
+                await organizationAccessService.HasOrganizationPermissionAsync(
+                    User,
+                    source.OrganizationId.Value,
+                    OrganizationPermissions.ManageConnectors,
+                    ct),
+            CalendarSourceScopes.Workspace when source.WorkspaceId.HasValue =>
+                await accessScopeService.CanManageWorkspaceAsync(User, source.WorkspaceId.Value, ct),
+            CalendarSourceScopes.User => source.UserId == currentUserId,
+            _ => false,
+        };
+    }
+}

backend/src/Socialize.Api/Modules/CalendarIntegrations/Handlers/UpdateCalendarSource.cs

@@ -0,0 +1,91 @@
+using FastEndpoints;
+using Microsoft.EntityFrameworkCore;
+using Socialize.Api.Data;
+using Socialize.Api.Infrastructure.Security;
+using Socialize.Api.Modules.CalendarIntegrations.Data;
+using Socialize.Api.Modules.CalendarIntegrations.Services;
+using Socialize.Api.Modules.Organizations.Services;
+
+namespace Socialize.Api.Modules.CalendarIntegrations.Handlers;
+
+internal class UpdateCalendarSourceHandler(
+    AppDbContext dbContext,
+    AccessScopeService accessScopeService,
+    OrganizationAccessService organizationAccessService)
+    : Endpoint<UpsertCalendarSourceRequest, CalendarSourceDto>
+{
+    public override void Configure()
+    {
+        Put("/api/calendar-integrations/sources/{sourceId:guid}");
+        Options(o => o.WithTags("Calendar Integrations"));
+    }
+
+    public override async Task HandleAsync(UpsertCalendarSourceRequest request, CancellationToken ct)
+    {
+        ArgumentNullException.ThrowIfNull(request);
+
+        Guid sourceId = Route<Guid>("sourceId");
+        CalendarSource? source = await dbContext.CalendarSources.SingleOrDefaultAsync(candidate => candidate.Id == sourceId, ct);
+        if (source is null)
+        {
+            await SendNotFoundAsync(ct);
+            return;
+        }
+
+        Guid currentUserId = User.GetUserId();
+        if (!await CanManageExistingSourceAsync(source, currentUserId, ct))
+        {
+            await SendForbiddenAsync(ct);
+            return;
+        }
+
+        if (source.Scope != request.Scope.Trim() ||
+            source.OrganizationId != (request.Scope == CalendarSourceScopes.Organization ? request.OrganizationId : null) ||
+            source.WorkspaceId != (request.Scope == CalendarSourceScopes.Workspace ? request.WorkspaceId : null))
+        {
+            AddError("Calendar source scope cannot be changed.");
+            await SendErrorsAsync(StatusCodes.Status409Conflict, ct);
+            return;
+        }
+
+        source.SourceUrl = NormalizeOptional(request.SourceUrl);
+        source.CatalogSourceReference = NormalizeOptional(request.CatalogSourceReference);
+        source.DisplayTitle = request.DisplayTitle.Trim();
+        source.Color = request.Color.Trim();
+        source.Category = request.Category.Trim();
+        source.IsEnabled = request.IsEnabled;
+        source.InheritanceMode = source.Scope == CalendarSourceScopes.Organization
+            ? NormalizeOptional(request.InheritanceMode) ?? CalendarSourceInheritanceModes.Optional
+            : null;
+        source.UpdatedAt = DateTimeOffset.UtcNow;
+
+        await dbContext.SaveChangesAsync(ct);
+
+        await SendOkAsync(CalendarSourceDto.FromSource(source, isReadOnly: false), ct);
+    }
+
+    private async Task<bool> CanManageExistingSourceAsync(
+        CalendarSource source,
+        Guid currentUserId,
+        CancellationToken ct)
+    {
+        return source.Scope switch
+        {
+            CalendarSourceScopes.Organization when source.OrganizationId.HasValue =>
+                await organizationAccessService.HasOrganizationPermissionAsync(
+                    User,
+                    source.OrganizationId.Value,
+                    OrganizationPermissions.ManageConnectors,
+                    ct),
+            CalendarSourceScopes.Workspace when source.WorkspaceId.HasValue =>
+                await accessScopeService.CanManageWorkspaceAsync(User, source.WorkspaceId.Value, ct),
+            CalendarSourceScopes.User => source.UserId == currentUserId,
+            _ => false,
+        };
+    }
+
+    private static string? NormalizeOptional(string? value)
+    {
+        return string.IsNullOrWhiteSpace(value) ? null : value.Trim();
+    }
+}

backend/src/Socialize.Api/Modules/CalendarIntegrations/Handlers/UserCalendarExportFeed.cs

@@ -0,0 +1,224 @@
+using FastEndpoints;
+using Microsoft.EntityFrameworkCore;
+using Socialize.Api.Data;
+using Socialize.Api.Infrastructure.Security;
+using Socialize.Api.Modules.CalendarIntegrations.Data;
+using Socialize.Api.Modules.CalendarIntegrations.Services;
+using Socialize.Api.Modules.Identity.Data;
+
+namespace Socialize.Api.Modules.CalendarIntegrations.Handlers;
+
+internal record UserCalendarExportFeedDto(
+    bool IsEnabled,
+    string? FeedUrl,
+    DateTimeOffset? CreatedAt,
+    DateTimeOffset? UpdatedAt,
+    DateTimeOffset? RevokedAt);
+
+internal class GetUserCalendarExportFeedHandler(AppDbContext dbContext)
+    : EndpointWithoutRequest<UserCalendarExportFeedDto>
+{
+    public override void Configure()
+    {
+        Get("/api/calendar-integrations/export-feed");
+        Options(o => o.WithTags("Calendar Integrations"));
+    }
+
+    public override async Task HandleAsync(CancellationToken ct)
+    {
+        UserCalendarExportFeed? feed = await dbContext.UserCalendarExportFeeds
+            .SingleOrDefaultAsync(candidate => candidate.UserId == User.GetUserId(), ct);
+
+        await SendAsync(UserCalendarExportFeedMapper.ToDto(feed, UserCalendarExportFeedMapper.BuildFeedUrl(feed)), cancellation: ct);
+    }
+}
+
+internal class EnableUserCalendarExportFeedHandler(AppDbContext dbContext)
+    : EndpointWithoutRequest<UserCalendarExportFeedDto>
+{
+    public override void Configure()
+    {
+        Post("/api/calendar-integrations/export-feed/enable");
+        Options(o => o.WithTags("Calendar Integrations"));
+    }
+
+    public override async Task HandleAsync(CancellationToken ct)
+    {
+        Guid userId = User.GetUserId();
+        string token = CalendarExportFeedTokenService.GenerateToken();
+        string tokenHash = CalendarExportFeedTokenService.HashToken(token);
+        DateTimeOffset now = DateTimeOffset.UtcNow;
+
+        UserCalendarExportFeed? feed = await dbContext.UserCalendarExportFeeds
+            .SingleOrDefaultAsync(candidate => candidate.UserId == userId, ct);
+
+        if (feed is null)
+        {
+            feed = new UserCalendarExportFeed
+            {
+                Id = Guid.NewGuid(),
+                UserId = userId,
+                Token = token,
+                TokenHash = tokenHash,
+                UpdatedAt = now,
+            };
+            dbContext.UserCalendarExportFeeds.Add(feed);
+        }
+        else if (feed.TokenHash is null || feed.RevokedAt.HasValue)
+        {
+            feed.Token = token;
+            feed.TokenHash = tokenHash;
+            feed.RevokedAt = null;
+            feed.UpdatedAt = now;
+        }
+        else
+        {
+            token = string.Empty;
+        }
+
+        await dbContext.SaveChangesAsync(ct);
+        await SendAsync(UserCalendarExportFeedMapper.ToDto(feed, UserCalendarExportFeedMapper.BuildFeedUrl(feed, token)), cancellation: ct);
+    }
+}
+
+internal class RegenerateUserCalendarExportFeedHandler(AppDbContext dbContext)
+    : EndpointWithoutRequest<UserCalendarExportFeedDto>
+{
+    public override void Configure()
+    {
+        Post("/api/calendar-integrations/export-feed/regenerate");
+        Options(o => o.WithTags("Calendar Integrations"));
+    }
+
+    public override async Task HandleAsync(CancellationToken ct)
+    {
+        Guid userId = User.GetUserId();
+        string token = CalendarExportFeedTokenService.GenerateToken();
+        DateTimeOffset now = DateTimeOffset.UtcNow;
+
+        UserCalendarExportFeed? feed = await dbContext.UserCalendarExportFeeds
+            .SingleOrDefaultAsync(candidate => candidate.UserId == userId, ct);
+
+        if (feed is null)
+        {
+            feed = new UserCalendarExportFeed
+            {
+                Id = Guid.NewGuid(),
+                UserId = userId,
+                UpdatedAt = now,
+            };
+            dbContext.UserCalendarExportFeeds.Add(feed);
+        }
+
+        feed.TokenHash = CalendarExportFeedTokenService.HashToken(token);
+        feed.Token = token;
+        feed.RevokedAt = null;
+        feed.UpdatedAt = now;
+
+        await dbContext.SaveChangesAsync(ct);
+        await SendAsync(UserCalendarExportFeedMapper.ToDto(feed, UserCalendarExportFeedMapper.BuildFeedUrl(feed, token)), cancellation: ct);
+    }
+}
+
+internal class RevokeUserCalendarExportFeedHandler(AppDbContext dbContext)
+    : EndpointWithoutRequest<UserCalendarExportFeedDto>
+{
+    public override void Configure()
+    {
+        Delete("/api/calendar-integrations/export-feed");
+        Options(o => o.WithTags("Calendar Integrations"));
+    }
+
+    public override async Task HandleAsync(CancellationToken ct)
+    {
+        UserCalendarExportFeed? feed = await dbContext.UserCalendarExportFeeds
+            .SingleOrDefaultAsync(candidate => candidate.UserId == User.GetUserId(), ct);
+
+        if (feed is not null)
+        {
+            feed.TokenHash = null;
+            feed.Token = null;
+            feed.RevokedAt = DateTimeOffset.UtcNow;
+            feed.UpdatedAt = feed.RevokedAt.Value;
+            await dbContext.SaveChangesAsync(ct);
+        }
+
+        await SendAsync(UserCalendarExportFeedMapper.ToDto(feed, null), cancellation: ct);
+    }
+}
+
+internal class GetUserCalendarExportFeedIcsHandler(
+    AppDbContext dbContext,
+    CalendarExportFeedService feedService)
+    : EndpointWithoutRequest
+{
+    public override void Configure()
+    {
+        AllowAnonymous();
+        Get("/api/calendar-integrations/export-feed/{token}.ics");
+        Options(o => o.WithTags("Calendar Integrations"));
+    }
+
+    public override async Task HandleAsync(CancellationToken ct)
+    {
+        string? token = Route<string?>("token");
+        if (string.IsNullOrWhiteSpace(token))
+        {
+            await SendNotFoundAsync(ct);
+            return;
+        }
+
+        string tokenHash = CalendarExportFeedTokenService.HashToken(token);
+
+        UserCalendarExportFeed? feed = await dbContext.UserCalendarExportFeeds
+            .SingleOrDefaultAsync(candidate =>
+                candidate.TokenHash == tokenHash &&
+                !candidate.RevokedAt.HasValue,
+                ct);
+
+        if (feed is null)
+        {
+            await SendNotFoundAsync(ct);
+            return;
+        }
+
+        User? user = await dbContext.Users.SingleOrDefaultAsync(candidate => candidate.Id == feed.UserId, ct);
+        if (user is null)
+        {
+            await SendNotFoundAsync(ct);
+            return;
+        }
+
+        string appBaseUrl = $"{HttpContext.Request.Scheme}://{HttpContext.Request.Host}";
+        string ics = await feedService.BuildUserFeedAsync(feed.UserId, user.Email, appBaseUrl, ct);
+
+        HttpContext.Response.ContentType = "text/calendar; charset=utf-8";
+        await HttpContext.Response.WriteAsync(ics, ct);
+    }
+}
+
+file static class UserCalendarExportFeedMapper
+{
+    public static UserCalendarExportFeedDto ToDto(UserCalendarExportFeed? feed, string? feedUrl)
+    {
+        return new UserCalendarExportFeedDto(
+            feed?.TokenHash is not null && !feed.RevokedAt.HasValue,
+            feedUrl,
+            feed?.CreatedAt,
+            feed?.UpdatedAt,
+            feed?.RevokedAt);
+    }
+
+    public static string? BuildFeedUrl(UserCalendarExportFeed? feed, string? token = null)
+    {
+        if (feed?.TokenHash is null || feed.RevokedAt.HasValue)
+        {
+            return null;
+        }
+
+        string effectiveToken = string.IsNullOrWhiteSpace(token) ? feed.Token ?? string.Empty : token;
+        return string.IsNullOrWhiteSpace(effectiveToken)
+            ? null
+            : $"/api/calendar-integrations/export-feed/{effectiveToken}.ics";
+    }
+}

backend/src/Socialize.Api/Modules/CalendarIntegrations/ModuleRegistration.cs

@@ -0,0 +1,13 @@
+namespace Socialize.Api.Modules.CalendarIntegrations;
+
+internal static class ModuleRegistration
+{
+    public static WebApplicationBuilder AddCalendarIntegrationsModule(this WebApplicationBuilder builder)
+    {
+        builder.Services.AddScoped<Services.CalendarExportFeedService>();
+        builder.Services.AddScoped<Services.CalendarImportSyncService>();
+        builder.Services.AddHostedService<Services.CalendarImportBackgroundService>();
+
+        return builder;
+    }
+}

backend/src/Socialize.Api/Modules/CalendarIntegrations/Services/CalendarExportFeedBuilder.cs

@@ -0,0 +1,86 @@
+using System.Text;
+using System.Globalization;
+
+namespace Socialize.Api.Modules.CalendarIntegrations.Services;
+
+internal sealed record CalendarExportFeedEvent(
+    string Uid,
+    string Title,
+    DateTimeOffset StartsAt,
+    DateTimeOffset EndsAt,
+    bool IsAllDay,
+    string? Description,
+    string? Url);
+
+internal static class CalendarExportFeedBuilder
+{
+    public static string Build(string calendarName, IReadOnlyCollection<CalendarExportFeedEvent> events)
+    {
+        StringBuilder builder = new();
+        builder.AppendLine("BEGIN:VCALENDAR");
+        builder.AppendLine("VERSION:2.0");
+        builder.AppendLine("PRODID:-//Socialize//User Work Calendar//EN");
+        builder.AppendLine("CALSCALE:GREGORIAN");
+        builder.AppendLine("METHOD:PUBLISH");
+        AppendLineInvariant(builder, $"X-WR-CALNAME:{EscapeText(calendarName)}");
+
+        foreach (CalendarExportFeedEvent feedEvent in events.OrderBy(calendarEvent => calendarEvent.StartsAt))
+        {
+            builder.AppendLine("BEGIN:VEVENT");
+            AppendLineInvariant(builder, $"UID:{EscapeText(feedEvent.Uid)}");
+            AppendLineInvariant(builder, $"DTSTAMP:{FormatUtc(DateTimeOffset.UtcNow)}");
+            AppendLineInvariant(builder, $"SUMMARY:{EscapeText(feedEvent.Title)}");
+
+            if (feedEvent.IsAllDay)
+            {
+                AppendLineInvariant(builder, $"DTSTART;VALUE=DATE:{FormatDate(feedEvent.StartsAt)}");
+                AppendLineInvariant(builder, $"DTEND;VALUE=DATE:{FormatDate(feedEvent.EndsAt)}");
+            }
+            else
+            {
+                AppendLineInvariant(builder, $"DTSTART:{FormatUtc(feedEvent.StartsAt)}");
+                AppendLineInvariant(builder, $"DTEND:{FormatUtc(feedEvent.EndsAt)}");
+            }
+
+            if (!string.IsNullOrWhiteSpace(feedEvent.Description))
+            {
+                AppendLineInvariant(builder, $"DESCRIPTION:{EscapeText(feedEvent.Description)}");
+            }
+
+            if (!string.IsNullOrWhiteSpace(feedEvent.Url))
+            {
+                AppendLineInvariant(builder, $"URL:{EscapeText(feedEvent.Url)}");
+            }
+
+            builder.AppendLine("END:VEVENT");
+        }
+
+        builder.AppendLine("END:VCALENDAR");
+        return builder.ToString();
+    }
+
+    private static string FormatDate(DateTimeOffset value)
+    {
+        return value.ToString("yyyyMMdd", System.Globalization.CultureInfo.InvariantCulture);
+    }
+
+    private static string FormatUtc(DateTimeOffset value)
+    {
+        return value.UtcDateTime.ToString("yyyyMMdd'T'HHmmss'Z'", System.Globalization.CultureInfo.InvariantCulture);
+    }
+
+    private static string EscapeText(string value)
+    {
+        return value
+            .Replace("\\", "\\\\", StringComparison.Ordinal)
+            .Replace("\r\n", "\\n", StringComparison.Ordinal)
+            .Replace("\n", "\\n", StringComparison.Ordinal)
+            .Replace(";", "\\;", StringComparison.Ordinal)
+            .Replace(",", "\\,", StringComparison.Ordinal);
+    }
+
+    private static void AppendLineInvariant(StringBuilder builder, FormattableString value)
+    {
+        builder.AppendLine(value.ToString(CultureInfo.InvariantCulture));
+    }
+}

backend/src/Socialize.Api/Modules/CalendarIntegrations/Services/CalendarExportFeedService.cs

@@ -0,0 +1,173 @@
+using Microsoft.EntityFrameworkCore;
+using Socialize.Api.Data;
+
+namespace Socialize.Api.Modules.CalendarIntegrations.Services;
+
+internal class CalendarExportFeedService(AppDbContext dbContext)
+{
+    public async Task<string> BuildUserFeedAsync(Guid userId, string? userEmail, string appBaseUrl, CancellationToken ct)
+    {
+        string normalizedEmail = userEmail?.Trim() ?? string.Empty;
+        Guid[] workspaceIds = await dbContext.Workspaces
+            .Where(workspace =>
+                workspace.OwnerUserId == userId ||
+                dbContext.OrganizationMemberships.Any(membership =>
+                    membership.OrganizationId == workspace.OrganizationId &&
+                    membership.UserId == userId))
+            .Select(workspace => workspace.Id)
+            .ToArrayAsync(ct);
+
+        List<CalendarExportFeedEvent> events = [];
+
+        events.AddRange(await dbContext.ContentItems
+            .Where(item => workspaceIds.Contains(item.WorkspaceId) && item.DueDate.HasValue)
+            .Join(
+                dbContext.Workspaces,
+                item => item.WorkspaceId,
+                workspace => workspace.Id,
+                (item, workspace) => new { item, workspace })
+            .Join(
+                dbContext.Clients,
+                itemWorkspace => itemWorkspace.item.ClientId,
+                client => client.Id,
+                (itemWorkspace, client) => new { itemWorkspace.item, itemWorkspace.workspace, client })
+            .Join(
+                dbContext.Campaigns,
+                itemWorkspaceClient => itemWorkspaceClient.item.CampaignId,
+                campaign => campaign.Id,
+                (itemWorkspaceClient, campaign) => new { itemWorkspaceClient.item, itemWorkspaceClient.workspace, itemWorkspaceClient.client, campaign })
+            .Select(candidate => ToContentFeedEvent(
+                candidate.item.Id,
+                candidate.item.Title,
+                candidate.item.Status,
+                candidate.item.DueDate!.Value,
+                candidate.workspace.Name,
+                candidate.client.Name,
+                candidate.campaign.Name,
+                appBaseUrl))
+            .ToListAsync(ct));
+
+        events.AddRange(await dbContext.ApprovalRequests
+            .Where(approval =>
+                approval.DueAt.HasValue &&
+                (approval.RequestedByUserId == userId ||
+                 (!string.IsNullOrEmpty(normalizedEmail) && EF.Functions.ILike(approval.ReviewerEmail, normalizedEmail))))
+            .Join(
+                dbContext.ContentItems,
+                approval => approval.ContentItemId,
+                item => item.Id,
+                (approval, item) => new { approval, item })
+            .Where(candidate => workspaceIds.Contains(candidate.approval.WorkspaceId))
+            .Join(
+                dbContext.Workspaces,
+                approvalItem => approvalItem.approval.WorkspaceId,
+                workspace => workspace.Id,
+                (approvalItem, workspace) => new { approvalItem.approval, approvalItem.item, workspace })
+            .Select(candidate => ToApprovalFeedEvent(
+                candidate.approval.Id,
+                candidate.item.Id,
+                candidate.item.Title,
+                candidate.approval.Stage,
+                candidate.approval.State,
+                candidate.approval.DueAt!.Value,
+                candidate.workspace.Name,
+                appBaseUrl))
+            .ToListAsync(ct));
+
+        events.AddRange(await dbContext.Campaigns
+            .Where(campaign => workspaceIds.Contains(campaign.WorkspaceId))
+            .Join(
+                dbContext.Workspaces,
+                campaign => campaign.WorkspaceId,
+                workspace => workspace.Id,
+                (campaign, workspace) => new { campaign, workspace })
+            .Select(candidate => ToCampaignFeedEvent(
+                candidate.campaign.Id,
+                candidate.campaign.Name,
+                candidate.campaign.Status,
+                candidate.campaign.StartDate,
+                candidate.campaign.EndDate,
+                candidate.workspace.Name,
+                appBaseUrl))
+            .ToListAsync(ct));
+
+        return CalendarExportFeedBuilder.Build("Socialize my work", events);
+    }
+
+    private static CalendarExportFeedEvent ToContentFeedEvent(
+        Guid contentItemId,
+        string title,
+        string status,
+        DateTimeOffset dueDate,
+        string workspaceName,
+        string clientName,
+        string campaignName,
+        string appBaseUrl)
+    {
+        (DateTimeOffset start, DateTimeOffset end, bool isAllDay) = NormalizeEventTime(dueDate);
+
+        return new CalendarExportFeedEvent(
+            $"content-{contentItemId}@socialize",
+            title,
+            start,
+            end,
+            isAllDay,
+            $"Status: {status}\nWorkspace: {workspaceName}\nClient: {clientName}\nCampaign: {campaignName}",
+            $"{appBaseUrl.TrimEnd('/')}/app/content/{contentItemId}");
+    }
+
+    private static CalendarExportFeedEvent ToApprovalFeedEvent(
+        Guid approvalId,
+        Guid contentItemId,
+        string contentTitle,
+        string stage,
+        string state,
+        DateTimeOffset dueAt,
+        string workspaceName,
+        string appBaseUrl)
+    {
+        (DateTimeOffset start, DateTimeOffset end, bool isAllDay) = NormalizeEventTime(dueAt);
+
+        return new CalendarExportFeedEvent(
+            $"approval-{approvalId}@socialize",
+            $"Approval due: {contentTitle}",
+            start,
+            end,
+            isAllDay,
+            $"Stage: {stage}\nState: {state}\nWorkspace: {workspaceName}",
+            $"{appBaseUrl.TrimEnd('/')}/app/content/{contentItemId}");
+    }
+
+    private static CalendarExportFeedEvent ToCampaignFeedEvent(
+        Guid campaignId,
+        string name,
+        string status,
+        DateTimeOffset startDate,
+        DateTimeOffset endDate,
+        string workspaceName,
+        string appBaseUrl)
+    {
+        DateTimeOffset start = new(startDate.Date, startDate.Offset);
+        DateTimeOffset end = new(endDate.Date.AddDays(1), endDate.Offset);
+
+        return new CalendarExportFeedEvent(
+            $"campaign-{campaignId}@socialize",
+            $"Campaign: {name}",
+            start,
+            end <= start ? start.AddDays(1) : end,
+            true,
+            $"Status: {status}\nWorkspace: {workspaceName}",
+            $"{appBaseUrl.TrimEnd('/')}/app/campaigns/{campaignId}");
+    }
+
+    private static (DateTimeOffset Start, DateTimeOffset End, bool IsAllDay) NormalizeEventTime(DateTimeOffset value)
+    {
+        if (value.TimeOfDay == TimeSpan.Zero)
+        {
+            DateTimeOffset start = new(value.Date, value.Offset);
+            return (start, start.AddDays(1), true);
+        }
+
+        return (value, value.AddMinutes(30), false);
+    }
+}

backend/src/Socialize.Api/Modules/CalendarIntegrations/Services/CalendarExportFeedTokenService.cs

@@ -0,0 +1,27 @@
+using System.Security.Cryptography;
+
+namespace Socialize.Api.Modules.CalendarIntegrations.Services;
+
+internal static class CalendarExportFeedTokenService
+{
+    public static string GenerateToken()
+    {
+        Span<byte> bytes = stackalloc byte[32];
+        RandomNumberGenerator.Fill(bytes);
+        return Base64UrlEncode(bytes);
+    }
+
+    public static string HashToken(string token)
+    {
+        byte[] bytes = SHA256.HashData(System.Text.Encoding.UTF8.GetBytes(token));
+        return Convert.ToHexString(bytes);
+    }
+
+    private static string Base64UrlEncode(ReadOnlySpan<byte> bytes)
+    {
+        return Convert.ToBase64String(bytes)
+            .TrimEnd('=')
+            .Replace('+', '-')
+            .Replace('/', '_');
+    }
+}

backend/src/Socialize.Api/Modules/CalendarIntegrations/Services/CalendarImportBackgroundService.cs

@@ -0,0 +1,37 @@
+namespace Socialize.Api.Modules.CalendarIntegrations.Services;
+
+internal sealed class CalendarImportBackgroundService(
+    IServiceScopeFactory scopeFactory,
+    ILogger<CalendarImportBackgroundService> logger)
+    : BackgroundService
+{
+    protected override async Task ExecuteAsync(CancellationToken stoppingToken)
+    {
+        using PeriodicTimer timer = new(TimeSpan.FromHours(6));
+        while (!stoppingToken.IsCancellationRequested)
+        {
+            await RefreshDueSourcesAsync(stoppingToken);
+            await timer.WaitForNextTickAsync(stoppingToken);
+        }
+    }
+
+    private async Task RefreshDueSourcesAsync(CancellationToken stoppingToken)
+    {
+        try
+        {
+            using IServiceScope scope = scopeFactory.CreateScope();
+            CalendarImportSyncService syncService = scope.ServiceProvider.GetRequiredService<CalendarImportSyncService>();
+            await syncService.RefreshDueSourcesAsync(stoppingToken);
+        }
+        catch (OperationCanceledException ex) when (stoppingToken.IsCancellationRequested)
+        {
+            logger.LogDebug(ex, "Calendar import background sync stopped.");
+        }
+#pragma warning disable CA1031 // Background service should log and continue after unexpected sync failures.
+        catch (Exception ex)
+        {
+            logger.LogError(ex, "Calendar import background sync failed.");
+        }
+#pragma warning restore CA1031
+    }
+}

backend/src/Socialize.Api/Modules/CalendarIntegrations/Services/CalendarImportSyncService.cs

@@ -0,0 +1,315 @@
+using Microsoft.EntityFrameworkCore;
+using Socialize.Api.Data;
+using Socialize.Api.Modules.CalendarIntegrations.Data;
+using System.Globalization;
+using System.Text.Json;
+
+namespace Socialize.Api.Modules.CalendarIntegrations.Services;
+
+#pragma warning disable S1075 // Supplemental observance identifiers intentionally use stable URI-like values.
+
+internal sealed class CalendarImportSyncService(
+    AppDbContext dbContext,
+    IHttpClientFactory httpClientFactory)
+{
+    private static readonly JsonSerializerOptions JsonSerializerOptions = new(JsonSerializerDefaults.Web);
+
+    public async Task RefreshSourceAsync(Guid sourceId, CancellationToken ct)
+    {
+        CalendarSource? source = await dbContext.CalendarSources
+            .SingleOrDefaultAsync(candidate => candidate.Id == sourceId, ct);
+        if (source is null)
+        {
+            throw new InvalidOperationException("Calendar source was not found.");
+        }
+
+        source.LastAttemptedSyncAt = DateTimeOffset.UtcNow;
+
+        if (string.IsNullOrWhiteSpace(source.SourceUrl))
+        {
+            source.LastSyncError = "Calendar source does not have a source URL.";
+            await dbContext.SaveChangesAsync(ct);
+            return;
+        }
+
+        try
+        {
+            using HttpClient httpClient = httpClientFactory.CreateClient();
+            DateOnly rangeStart = DateOnly.FromDateTime(DateTime.UtcNow.AddYears(-1));
+            DateOnly rangeEnd = DateOnly.FromDateTime(DateTime.UtcNow.AddYears(2));
+            IReadOnlyCollection<ParsedCalendarEvent> parsedEvents = await GetParsedEventsAsync(
+                httpClient,
+                source.SourceUrl,
+                rangeStart,
+                rangeEnd,
+                ct);
+
+            await ReplaceEventsAsync(source.Id, parsedEvents, ct);
+
+            source.LastSuccessfulSyncAt = DateTimeOffset.UtcNow;
+            source.LastSyncError = null;
+            source.LastAttemptedSyncAt = source.LastSuccessfulSyncAt;
+            await dbContext.SaveChangesAsync(ct);
+        }
+        catch (HttpRequestException ex)
+        {
+            await RecordSyncFailureAsync(source, ex.Message, ct);
+        }
+        catch (FormatException ex)
+        {
+            await RecordSyncFailureAsync(source, ex.Message, ct);
+        }
+        catch (InvalidOperationException ex)
+        {
+            await RecordSyncFailureAsync(source, ex.Message, ct);
+        }
+    }
+
+    public async Task RefreshDueSourcesAsync(CancellationToken ct)
+    {
+        DateTimeOffset staleBefore = DateTimeOffset.UtcNow.AddHours(-12);
+        Guid[] sourceIds = await dbContext.CalendarSources
+            .Where(source => source.IsEnabled && source.SourceUrl != null)
+            .Where(source => source.LastAttemptedSyncAt == null || source.LastAttemptedSyncAt < staleBefore)
+            .OrderBy(source => source.LastAttemptedSyncAt)
+            .Select(source => source.Id)
+            .Take(25)
+            .ToArrayAsync(ct);
+
+        foreach (Guid sourceId in sourceIds)
+        {
+            await RefreshSourceAsync(sourceId, ct);
+        }
+    }
+
+    private async Task ReplaceEventsAsync(
+        Guid sourceId,
+        IReadOnlyCollection<ParsedCalendarEvent> parsedEvents,
+        CancellationToken ct)
+    {
+        await dbContext.CalendarEvents
+            .Where(calendarEvent => calendarEvent.CalendarSourceId == sourceId)
+            .ExecuteDeleteAsync(ct);
+
+        DateTimeOffset importedAt = DateTimeOffset.UtcNow;
+        foreach (ParsedCalendarEvent parsedEvent in parsedEvents)
+        {
+            dbContext.CalendarEvents.Add(new CalendarEvent
+            {
+                Id = Guid.NewGuid(),
+                CalendarSourceId = sourceId,
+                SourceEventUid = parsedEvent.SourceEventUid,
+                Title = parsedEvent.Title,
+                Description = parsedEvent.Description,
+                IsAllDay = parsedEvent.IsAllDay,
+                IsFloatingTime = parsedEvent.IsFloatingTime,
+                StartDate = parsedEvent.StartDate,
+                EndDate = parsedEvent.EndDate,
+                StartLocalDateTime = parsedEvent.StartLocalDateTime,
+                EndLocalDateTime = parsedEvent.EndLocalDateTime,
+                StartUtc = parsedEvent.StartUtc,
+                EndUtc = parsedEvent.EndUtc,
+                TimeZoneId = parsedEvent.TimeZoneId,
+                RecurrenceId = parsedEvent.RecurrenceId,
+                Location = parsedEvent.Location,
+                SourceUrl = parsedEvent.SourceUrl,
+                SourceLastModifiedAt = parsedEvent.SourceLastModifiedAt,
+                ImportedAt = importedAt,
+            });
+        }
+    }
+
+    private static async Task<IReadOnlyCollection<ParsedCalendarEvent>> GetParsedEventsAsync(
+        HttpClient httpClient,
+        string sourceUrl,
+        DateOnly rangeStart,
+        DateOnly rangeEnd,
+        CancellationToken ct)
+    {
+        if (TryGetNagerCountryCode(sourceUrl, out string? countryCode))
+        {
+            return await GetNagerEventsAsync(httpClient, sourceUrl, countryCode!, rangeStart, rangeEnd, ct);
+        }
+
+        string content = await httpClient.GetStringAsync(new Uri(sourceUrl), ct);
+        return IcsCalendarParser.Parse(content, rangeStart, rangeEnd);
+    }
+
+    private static async Task<IReadOnlyCollection<ParsedCalendarEvent>> GetNagerEventsAsync(
+        HttpClient httpClient,
+        string sourceUrl,
+        string countryCode,
+        DateOnly rangeStart,
+        DateOnly rangeEnd,
+        CancellationToken ct)
+    {
+        List<ParsedCalendarEvent> events = [];
+        for (int year = rangeStart.Year; year <= rangeEnd.Year; year++)
+        {
+            string yearUrl = BuildNagerYearUrl(sourceUrl, countryCode, year);
+            string json = await httpClient.GetStringAsync(new Uri(yearUrl), ct);
+            NagerHoliday[] holidays = JsonSerializer.Deserialize<NagerHoliday[]>(json, JsonSerializerOptions) ?? [];
+
+            foreach (NagerHoliday holiday in holidays)
+            {
+                if (!DateOnly.TryParse(holiday.Date, CultureInfo.InvariantCulture, out DateOnly date) ||
+                    date < rangeStart ||
+                    date > rangeEnd)
+                {
+                    continue;
+                }
+
+                events.Add(ToParsedEvent(
+                    $"nager-{countryCode}-{date:yyyyMMdd}-{NormalizeUidPart(holiday.Name)}",
+                    string.IsNullOrWhiteSpace(holiday.Name) ? holiday.LocalName : holiday.Name,
+                    holiday.LocalName,
+                    date,
+                    string.Join(", ", holiday.Types ?? []),
+                    yearUrl));
+            }
+
+            events.AddRange(GetSupplementalCountryEvents(countryCode, year, rangeStart, rangeEnd));
+        }
+
+        return events
+            .GroupBy(calendarEvent => calendarEvent.SourceEventUid)
+            .Select(group => group.First())
+            .OrderBy(calendarEvent => calendarEvent.StartDate)
+            .ThenBy(calendarEvent => calendarEvent.Title)
+            .ToArray();
+    }
+
+    private static ParsedCalendarEvent ToParsedEvent(
+        string uid,
+        string? title,
+        string? localName,
+        DateOnly date,
+        string? types,
+        string sourceUrl)
+    {
+        string? description = string.IsNullOrWhiteSpace(types)
+            ? localName
+            : $"{localName}\nTypes: {types}";
+
+        return new ParsedCalendarEvent(
+            uid,
+            string.IsNullOrWhiteSpace(title) ? "Untitled event" : title,
+            description,
+            IsAllDay: true,
+            IsFloatingTime: false,
+            date,
+            date.AddDays(1),
+            StartLocalDateTime: null,
+            EndLocalDateTime: null,
+            StartUtc: null,
+            EndUtc: null,
+            TimeZoneId: null,
+            RecurrenceId: null,
+            Location: null,
+            sourceUrl,
+            SourceLastModifiedAt: null);
+    }
+
+    private static IReadOnlyCollection<ParsedCalendarEvent> GetSupplementalCountryEvents(
+        string countryCode,
+        int year,
+        DateOnly rangeStart,
+        DateOnly rangeEnd)
+    {
+        if (!countryCode.Equals("CA", StringComparison.OrdinalIgnoreCase))
+        {
+            return [];
+        }
+
+        DateOnly mothersDay = NthWeekdayOfMonth(year, month: 5, DayOfWeek.Sunday, occurrence: 2);
+        if (mothersDay < rangeStart || mothersDay > rangeEnd)
+        {
+            return [];
+        }
+
+        return
+        [
+            ToParsedEvent(
+                $"socialize-ca-mothers-day-{year}",
+                "Mother's Day",
+                "Mother's Day",
+                mothersDay,
+                "Observance",
+                "socialize://calendar-observances/CA"),
+        ];
+    }
+
+    private static DateOnly NthWeekdayOfMonth(int year, int month, DayOfWeek dayOfWeek, int occurrence)
+    {
+        DateOnly date = new(year, month, 1);
+        while (date.DayOfWeek != dayOfWeek)
+        {
+            date = date.AddDays(1);
+        }
+
+        return date.AddDays((occurrence - 1) * 7);
+    }
+
+    private static bool TryGetNagerCountryCode(string sourceUrl, out string? countryCode)
+    {
+        countryCode = null;
+        if (!Uri.TryCreate(sourceUrl, UriKind.Absolute, out Uri? uri) ||
+            !uri.Host.Contains("date.nager.at", StringComparison.OrdinalIgnoreCase))
+        {
+            return false;
+        }
+
+        string[] segments = uri.AbsolutePath
+            .Split('/', StringSplitOptions.RemoveEmptyEntries | StringSplitOptions.TrimEntries);
+
+        string? candidate = segments.LastOrDefault(segment => segment.Length == 2);
+        if (candidate is null)
+        {
+            return false;
+        }
+
+        countryCode = candidate.ToUpperInvariant();
+        return true;
+    }
+
+    private static string BuildNagerYearUrl(string sourceUrl, string countryCode, int year)
+    {
+        if (Uri.TryCreate(sourceUrl, UriKind.Absolute, out Uri? uri))
+        {
+            return $"{uri.Scheme}://{uri.Host}/api/v3/PublicHolidays/{year}/{countryCode}";
+        }
+
+        return $"https://date.nager.at/api/v3/PublicHolidays/{year}/{countryCode}";
+    }
+
+    private static string NormalizeUidPart(string? value)
+    {
+        return new string((value ?? "holiday")
+            .ToUpperInvariant()
+            .Select(character => char.IsLetterOrDigit(character) ? character : '-')
+            .ToArray())
+            .Trim('-');
+    }
+
+    private async Task RecordSyncFailureAsync(
+        CalendarSource source,
+        string message,
+        CancellationToken ct)
+    {
+        source.LastSyncError = NormalizeSyncError(message);
+        await dbContext.SaveChangesAsync(ct);
+    }
+
+    public static string NormalizeSyncError(string message)
+    {
+        ArgumentNullException.ThrowIfNull(message);
+
+        return message.Length > 2048 ? message[..2048] : message;
+    }
+
+    private sealed record NagerHoliday(
+        string Date,
+        string LocalName,
+        string Name,
+        string[]? Types);
+}

backend/src/Socialize.Api/Modules/CalendarIntegrations/Services/CalendarSourceConstants.cs

@@ -0,0 +1,14 @@
+namespace Socialize.Api.Modules.CalendarIntegrations.Services;
+
+internal static class CalendarSourceScopes
+{
+    public const string Organization = "Organization";
+    public const string Workspace = "Workspace";
+    public const string User = "User";
+}
+
+internal static class CalendarSourceInheritanceModes
+{
+    public const string Required = "Required";
+    public const string Optional = "Optional";
+}

backend/src/Socialize.Api/Modules/CalendarIntegrations/Services/CalendarSourceRules.cs

@@ -0,0 +1,51 @@
+using Socialize.Api.Modules.CalendarIntegrations.Data;
+
+namespace Socialize.Api.Modules.CalendarIntegrations.Services;
+
+internal static class CalendarSourceRules
+{
+    public static readonly string[] SupportedScopes =
+    [
+        CalendarSourceScopes.Organization,
+        CalendarSourceScopes.Workspace,
+        CalendarSourceScopes.User,
+    ];
+
+    public static readonly string[] SupportedInheritanceModes =
+    [
+        CalendarSourceInheritanceModes.Required,
+        CalendarSourceInheritanceModes.Optional,
+    ];
+
+    public static bool IsSupportedScope(string? scope)
+    {
+        return SupportedScopes.Contains(scope?.Trim(), StringComparer.Ordinal);
+    }
+
+    public static bool IsSupportedInheritanceMode(string? inheritanceMode)
+    {
+        return SupportedInheritanceModes.Contains(inheritanceMode?.Trim(), StringComparer.Ordinal);
+    }
+
+    public static bool IsInheritedOrganizationSource(CalendarSource source, Guid workspaceOrganizationId)
+    {
+        return source.Scope == CalendarSourceScopes.Organization &&
+               source.OrganizationId == workspaceOrganizationId;
+    }
+
+    public static bool CanManageScope(
+        string scope,
+        bool canManageOrganizationCalendars,
+        bool canManageWorkspaceCalendars,
+        Guid currentUserId,
+        Guid? sourceUserId)
+    {
+        return scope switch
+        {
+            CalendarSourceScopes.Organization => canManageOrganizationCalendars,
+            CalendarSourceScopes.Workspace => canManageWorkspaceCalendars,
+            CalendarSourceScopes.User => sourceUserId == currentUserId,
+            _ => false,
+        };
+    }
+}

backend/src/Socialize.Api/Modules/CalendarIntegrations/Services/IcsCalendarParser.cs

@@ -0,0 +1,420 @@
+using System.Globalization;
+using System.Text;
+
+namespace Socialize.Api.Modules.CalendarIntegrations.Services;
+
+internal record ParsedCalendarEvent(
+    string SourceEventUid,
+    string Title,
+    string? Description,
+    bool IsAllDay,
+    bool IsFloatingTime,
+    DateOnly StartDate,
+    DateOnly EndDate,
+    DateTime? StartLocalDateTime,
+    DateTime? EndLocalDateTime,
+    DateTimeOffset? StartUtc,
+    DateTimeOffset? EndUtc,
+    string? TimeZoneId,
+    string? RecurrenceId,
+    string? Location,
+    string? SourceUrl,
+    DateTimeOffset? SourceLastModifiedAt);
+
+internal record IcsDateTimeValue(
+    bool IsAllDay,
+    bool IsFloatingTime,
+    DateOnly Date,
+    DateTime? LocalDateTime,
+    DateTimeOffset? UtcDateTime,
+    string? TimeZoneId);
+
+internal sealed record IcsRawEvent(
+    string Uid,
+    string Title,
+    string? Description,
+    IcsDateTimeValue Start,
+    IcsDateTimeValue? End,
+    string? RRule,
+    string? Location,
+    string? SourceUrl,
+    DateTimeOffset? LastModifiedAt);
+
+internal static class IcsCalendarParser
+{
+    public static IReadOnlyCollection<ParsedCalendarEvent> Parse(
+        string content,
+        DateOnly rangeStart,
+        DateOnly rangeEnd)
+    {
+        ArgumentNullException.ThrowIfNull(content);
+
+        List<ParsedCalendarEvent> events = [];
+        foreach (IcsRawEvent rawEvent in ReadRawEvents(content))
+        {
+            events.AddRange(Expand(rawEvent, rangeStart, rangeEnd));
+        }
+
+        return events
+            .OrderBy(calendarEvent => calendarEvent.StartDate)
+            .ThenBy(calendarEvent => calendarEvent.Title)
+            .ToArray();
+    }
+
+    private static IEnumerable<IcsRawEvent> ReadRawEvents(string content)
+    {
+        List<string> lines = UnfoldLines(content).ToList();
+        int index = 0;
+        while (index < lines.Count)
+        {
+            if (!lines[index].Equals("BEGIN:VEVENT", StringComparison.OrdinalIgnoreCase))
+            {
+                index++;
+                continue;
+            }
+
+            Dictionary<string, List<(Dictionary<string, string> Parameters, string Value)>> properties =
+                new(StringComparer.OrdinalIgnoreCase);
+
+            index++;
+            while (index < lines.Count && !lines[index].Equals("END:VEVENT", StringComparison.OrdinalIgnoreCase))
+            {
+                ParseProperty(lines[index], properties);
+                index++;
+            }
+
+            if (!TryGetFirst(properties, "DTSTART", out var startProperty))
+            {
+                continue;
+            }
+
+            IcsDateTimeValue start = ParseDateTimeValue(startProperty.Value, startProperty.Parameters);
+            IcsDateTimeValue? end = TryGetFirst(properties, "DTEND", out var endProperty)
+                ? ParseDateTimeValue(endProperty.Value, endProperty.Parameters)
+                : null;
+
+            string uid = TryGetFirst(properties, "UID", out var uidProperty)
+                ? uidProperty.Value
+                : $"{start.Date:yyyyMMdd}:{GetText(properties, "SUMMARY") ?? "calendar-event"}";
+
+            yield return new IcsRawEvent(
+                uid,
+                GetText(properties, "SUMMARY") ?? "Untitled event",
+                GetText(properties, "DESCRIPTION"),
+                start,
+                end,
+                GetText(properties, "RRULE"),
+                GetText(properties, "LOCATION"),
+                GetText(properties, "URL"),
+                TryGetFirst(properties, "LAST-MODIFIED", out var lastModified)
+                    ? ParseDateTimeValue(lastModified.Value, lastModified.Parameters).UtcDateTime
+                    : null);
+
+            index++;
+        }
+    }
+
+    private static IEnumerable<string> UnfoldLines(string content)
+    {
+        StringBuilder? current = null;
+        using StringReader reader = new(content.Replace("\r\n", "\n", StringComparison.Ordinal).Replace('\r', '\n'));
+        while (reader.ReadLine() is { } line)
+        {
+            if ((line.StartsWith(' ') || line.StartsWith('\t')) && current is not null)
+            {
+                current.Append(line[1..]);
+                continue;
+            }
+
+            if (current is not null)
+            {
+                yield return current.ToString();
+            }
+
+            current = new StringBuilder(line);
+        }
+
+        if (current is not null)
+        {
+            yield return current.ToString();
+        }
+    }
+
+    private static void ParseProperty(
+        string line,
+        Dictionary<string, List<(Dictionary<string, string> Parameters, string Value)>> properties)
+    {
+        int separatorIndex = line.IndexOf(':', StringComparison.Ordinal);
+        if (separatorIndex < 0)
+        {
+            return;
+        }
+
+        string nameAndParameters = line[..separatorIndex];
+        string value = UnescapeText(line[(separatorIndex + 1)..]);
+        string[] nameParts = nameAndParameters.Split(';');
+        string name = nameParts[0];
+        Dictionary<string, string> parameters = new(StringComparer.OrdinalIgnoreCase);
+        foreach (string parameterPart in nameParts.Skip(1))
+        {
+            int equalsIndex = parameterPart.IndexOf('=', StringComparison.Ordinal);
+            if (equalsIndex > 0)
+            {
+                parameters[parameterPart[..equalsIndex]] = parameterPart[(equalsIndex + 1)..].Trim('"');
+            }
+        }
+
+        if (!properties.TryGetValue(name, out var values))
+        {
+            values = [];
+            properties[name] = values;
+        }
+
+        values.Add((parameters, value));
+    }
+
+    private static string UnescapeText(string value)
+    {
+        return value
+            .Replace("\\n", "\n", StringComparison.OrdinalIgnoreCase)
+            .Replace("\\,", ",", StringComparison.Ordinal)
+            .Replace("\\;", ";", StringComparison.Ordinal)
+            .Replace("\\\\", "\\", StringComparison.Ordinal);
+    }
+
+    private static bool TryGetFirst(
+        Dictionary<string, List<(Dictionary<string, string> Parameters, string Value)>> properties,
+        string key,
+        out (Dictionary<string, string> Parameters, string Value) value)
+    {
+        if (properties.TryGetValue(key, out var values) && values.Count > 0)
+        {
+            value = values[0];
+            return true;
+        }
+
+        value = default;
+        return false;
+    }
+
+    private static string? GetText(
+        Dictionary<string, List<(Dictionary<string, string> Parameters, string Value)>> properties,
+        string key)
+    {
+        return TryGetFirst(properties, key, out var value) ? value.Value : null;
+    }
+
+    private static IcsDateTimeValue ParseDateTimeValue(
+        string value,
+        Dictionary<string, string> parameters)
+    {
+        bool isAllDay = parameters.TryGetValue("VALUE", out string? valueType) &&
+                        valueType.Equals("DATE", StringComparison.OrdinalIgnoreCase);
+
+        if (isAllDay || value.Length == 8)
+        {
+            DateOnly date = DateOnly.ParseExact(value, "yyyyMMdd", CultureInfo.InvariantCulture);
+            return new IcsDateTimeValue(true, false, date, null, null, null);
+        }
+
+        bool utc = value.EndsWith('Z');
+        string parseValue = utc ? value[..^1] : value;
+        DateTime local = DateTime.ParseExact(parseValue, "yyyyMMdd'T'HHmmss", CultureInfo.InvariantCulture);
+        if (utc)
+        {
+            DateTimeOffset utcValue = new(DateTime.SpecifyKind(local, DateTimeKind.Utc));
+            return new IcsDateTimeValue(false, false, DateOnly.FromDateTime(local), local, utcValue, "UTC");
+        }
+
+        string? timeZoneId = parameters.GetValueOrDefault("TZID");
+        bool floating = string.IsNullOrWhiteSpace(timeZoneId);
+        return new IcsDateTimeValue(
+            false,
+            floating,
+            DateOnly.FromDateTime(local),
+            local,
+            TryConvertToUtc(local, timeZoneId),
+            timeZoneId);
+    }
+
+    private static DateTimeOffset? TryConvertToUtc(DateTime localDateTime, string? timeZoneId)
+    {
+        if (string.IsNullOrWhiteSpace(timeZoneId))
+        {
+            return null;
+        }
+
+        try
+        {
+            TimeZoneInfo timeZone = TimeZoneInfo.FindSystemTimeZoneById(timeZoneId);
+            DateTime unspecified = DateTime.SpecifyKind(localDateTime, DateTimeKind.Unspecified);
+            return TimeZoneInfo.ConvertTimeToUtc(unspecified, timeZone);
+        }
+        catch (TimeZoneNotFoundException)
+        {
+            return null;
+        }
+        catch (InvalidTimeZoneException)
+        {
+            return null;
+        }
+    }
+
+    private static IEnumerable<ParsedCalendarEvent> Expand(
+        IcsRawEvent rawEvent,
+        DateOnly rangeStart,
+        DateOnly rangeEnd)
+    {
+        TimeSpan duration = GetDuration(rawEvent.Start, rawEvent.End);
+        IReadOnlyCollection<DateOnly> starts = ExpandStartDates(rawEvent, rangeStart, rangeEnd);
+        foreach (DateOnly startDate in starts)
+        {
+            int dayOffset = startDate.DayNumber - rawEvent.Start.Date.DayNumber;
+            IcsDateTimeValue occurrenceStart = Shift(rawEvent.Start, dayOffset);
+            IcsDateTimeValue occurrenceEnd = rawEvent.End is null
+                ? ShiftByDuration(occurrenceStart, duration)
+                : Shift(rawEvent.End, dayOffset);
+
+            yield return new ParsedCalendarEvent(
+                rawEvent.Uid,
+                rawEvent.Title,
+                rawEvent.Description,
+                occurrenceStart.IsAllDay,
+                occurrenceStart.IsFloatingTime,
+                occurrenceStart.Date,
+                occurrenceEnd.Date,
+                occurrenceStart.LocalDateTime,
+                occurrenceEnd.LocalDateTime,
+                occurrenceStart.UtcDateTime,
+                occurrenceEnd.UtcDateTime,
+                occurrenceStart.TimeZoneId,
+                rawEvent.RRule is null ? null : rawEvent.Uid,
+                rawEvent.Location,
+                rawEvent.SourceUrl,
+                rawEvent.LastModifiedAt);
+        }
+    }
+
+    private static TimeSpan GetDuration(IcsDateTimeValue start, IcsDateTimeValue? end)
+    {
+        if (end is null)
+        {
+            return start.IsAllDay ? TimeSpan.FromDays(1) : TimeSpan.Zero;
+        }
+
+        if (start.IsAllDay)
+        {
+            return TimeSpan.FromDays(Math.Max(1, end.Date.DayNumber - start.Date.DayNumber));
+        }
+
+        if (start.LocalDateTime.HasValue && end.LocalDateTime.HasValue)
+        {
+            return end.LocalDateTime.Value - start.LocalDateTime.Value;
+        }
+
+        return TimeSpan.Zero;
+    }
+
+    private static List<DateOnly> ExpandStartDates(
+        IcsRawEvent rawEvent,
+        DateOnly rangeStart,
+        DateOnly rangeEnd)
+    {
+        if (string.IsNullOrWhiteSpace(rawEvent.RRule))
+        {
+            return IsInRange(rawEvent.Start.Date, rangeStart, rangeEnd) ? [rawEvent.Start.Date] : [];
+        }
+
+        Dictionary<string, string> rule = rawEvent.RRule
+            .Split(';', StringSplitOptions.RemoveEmptyEntries | StringSplitOptions.TrimEntries)
+            .Select(part => part.Split('=', 2))
+            .Where(parts => parts.Length == 2)
+            .ToDictionary(parts => parts[0], parts => parts[1], StringComparer.OrdinalIgnoreCase);
+
+        string frequency = rule.GetValueOrDefault("FREQ", "DAILY");
+        int interval = int.TryParse(rule.GetValueOrDefault("INTERVAL"), out int parsedInterval)
+            ? Math.Max(1, parsedInterval)
+            : 1;
+        int? count = int.TryParse(rule.GetValueOrDefault("COUNT"), out int parsedCount) ? parsedCount : null;
+        DateOnly? until = TryParseUntil(rule.GetValueOrDefault("UNTIL"));
+        List<DateOnly> dates = [];
+
+        DateOnly current = rawEvent.Start.Date;
+        for (int occurrence = 1; occurrence <= (count ?? 500); occurrence++)
+        {
+            if (until.HasValue && current > until.Value)
+            {
+                break;
+            }
+
+            if (current > rangeEnd)
+            {
+                break;
+            }
+
+            if (IsInRange(current, rangeStart, rangeEnd))
+            {
+                dates.Add(current);
+            }
+
+            current = frequency.ToUpperInvariant() switch
+            {
+                "YEARLY" => current.AddYears(interval),
+                "MONTHLY" => current.AddMonths(interval),
+                "WEEKLY" => current.AddDays(7 * interval),
+                _ => current.AddDays(interval),
+            };
+        }
+
+        return dates;
+    }
+
+    private static DateOnly? TryParseUntil(string? value)
+    {
+        if (string.IsNullOrWhiteSpace(value))
+        {
+            return null;
+        }
+
+        string dateValue = value.EndsWith('Z') ? value[..^1] : value;
+        if (dateValue.Length >= 8 &&
+            DateOnly.TryParseExact(dateValue[..8], "yyyyMMdd", CultureInfo.InvariantCulture, DateTimeStyles.None, out DateOnly date))
+        {
+            return date;
+        }
+
+        return null;
+    }
+
+    private static bool IsInRange(DateOnly value, DateOnly rangeStart, DateOnly rangeEnd)
+    {
+        return value >= rangeStart && value <= rangeEnd;
+    }
+
+    private static IcsDateTimeValue Shift(IcsDateTimeValue value, int dayOffset)
+    {
+        return value with
+        {
+            Date = value.Date.AddDays(dayOffset),
+            LocalDateTime = value.LocalDateTime?.AddDays(dayOffset),
+            UtcDateTime = value.UtcDateTime?.AddDays(dayOffset),
+        };
+    }
+
+    private static IcsDateTimeValue ShiftByDuration(IcsDateTimeValue value, TimeSpan duration)
+    {
+        if (value.IsAllDay)
+        {
+            return value with { Date = value.Date.AddDays(Math.Max(1, (int)duration.TotalDays)) };
+        }
+
+        return value with
+        {
+            Date = value.LocalDateTime.HasValue
+                ? DateOnly.FromDateTime(value.LocalDateTime.Value.Add(duration))
+                : value.Date,
+            LocalDateTime = value.LocalDateTime?.Add(duration),
+            UtcDateTime = value.UtcDateTime?.Add(duration),
+        };
+    }
+}

backend/src/Socialize.Api/Modules/Campaigns/Data/Campaign.cs

@@ -1,6 +1,6 @@
 namespace Socialize.Api.Modules.Campaigns.Data;
 
-public class Campaign
+internal class Campaign
 {
     public Guid Id { get; init; }
     public Guid WorkspaceId { get; set; }

backend/src/Socialize.Api/Modules/Campaigns/Data/CampaignModelConfiguration.cs

@@ -1,8 +1,10 @@
 using Microsoft.EntityFrameworkCore;
+using Socialize.Api.Modules.Clients.Data;
+using Socialize.Api.Modules.Workspaces.Data;
 
 namespace Socialize.Api.Modules.Campaigns.Data;
 
-public static class CampaignModelConfiguration
+internal static class CampaignModelConfiguration
 {
     public static ModelBuilder ConfigureCampaignsModule(this ModelBuilder modelBuilder)
     {
@@ -20,6 +22,14 @@ public static class CampaignModelConfiguration
             campaign.HasIndex(x => new { x.ClientId, x.Name }).IsUnique();
             campaign.HasIndex(x => x.WorkspaceId);
             campaign.HasIndex(x => x.ClientId);
+            campaign.HasOne<Workspace>()
+                .WithMany()
+                .HasForeignKey(x => x.WorkspaceId)
+                .OnDelete(DeleteBehavior.Restrict);
+            campaign.HasOne<Client>()
+                .WithMany()
+                .HasForeignKey(x => x.ClientId)
+                .OnDelete(DeleteBehavior.Restrict);
         });
 
         return modelBuilder;

backend/src/Socialize.Api/Modules/Campaigns/Handlers/CreateCampaign.cs

@@ -6,7 +6,7 @@ using Socialize.Api.Modules.Campaigns.Data;
 
 namespace Socialize.Api.Modules.Campaigns.Handlers;
 
-public record CreateCampaignRequest(
+internal record CreateCampaignRequest(
     Guid WorkspaceId,
     Guid ClientId,
     string Name,
@@ -15,7 +15,7 @@ public record CreateCampaignRequest(
     string? Description,
     string? Notes);
 
-public class CreateCampaignRequestValidator
+internal class CreateCampaignRequestValidator
     : Validator<CreateCampaignRequest>
 {
     public CreateCampaignRequestValidator()
@@ -32,7 +32,7 @@ public class CreateCampaignRequestValidator
     }
 }
 
-public class CreateCampaignHandler(
+internal class CreateCampaignHandler(
     AppDbContext dbContext,
     AccessScopeService accessScopeService)
     : Endpoint<CreateCampaignRequest, CampaignDto>

backend/src/Socialize.Api/Modules/Campaigns/Handlers/GetCampaigns.cs

@@ -6,9 +6,9 @@ using Socialize.Api.Modules.Campaigns.Data;
 
 namespace Socialize.Api.Modules.Campaigns.Handlers;
 
-public record GetCampaignsRequest(Guid? WorkspaceId, Guid? ClientId);
+internal record GetCampaignsRequest(Guid? WorkspaceId, Guid? ClientId);
 
-public record CampaignDto(
+internal record CampaignDto(
     Guid Id,
     Guid WorkspaceId,
     Guid ClientId,
@@ -19,7 +19,7 @@ public record CampaignDto(
     DateTimeOffset StartDate,
     DateTimeOffset EndDate);
 
-public class GetCampaignsHandler(
+internal class GetCampaignsHandler(
     AppDbContext dbContext,
     AccessScopeService accessScopeService)
     : Endpoint<GetCampaignsRequest, IReadOnlyCollection<CampaignDto>>
@@ -34,7 +34,7 @@ public class GetCampaignsHandler(
     {
         IQueryable<Campaign> query = dbContext.Campaigns.AsQueryable();
 
-        if (!accessScopeService.IsManager(User))
+        if (!AccessScopeService.IsManager(User))
         {
             IReadOnlyCollection<Guid> workspaceScopeIds = await accessScopeService.GetAccessibleWorkspaceIdsAsync(User, ct);
             IReadOnlyCollection<Guid> clientScopeIds = User.GetClientScopeIds();

backend/src/Socialize.Api/Modules/Campaigns/ModuleRegistration.cs

@@ -2,7 +2,7 @@ using Socialize.Api.Modules.Campaigns.Data;
 
 namespace Socialize.Api.Modules.Campaigns;
 
-public static class DependencyInjection
+internal static class ModuleRegistration
 {
     public static WebApplicationBuilder AddCampaignsModule(
         this WebApplicationBuilder builder)

backend/src/Socialize.Api/Modules/Channels/Data/Channel.cs

@@ -0,0 +1,12 @@
+namespace Socialize.Api.Modules.Channels.Data;
+
+internal class Channel
+{
+    public Guid Id { get; init; }
+    public Guid WorkspaceId { get; set; }
+    public required string Name { get; set; }
+    public required string Network { get; set; }
+    public string? Handle { get; set; }
+    public string? ExternalUrl { get; set; }
+    public DateTimeOffset CreatedAt { get; init; }
+}

backend/src/Socialize.Api/Modules/Channels/Data/ChannelModelConfiguration.cs

@@ -0,0 +1,31 @@
+using Microsoft.EntityFrameworkCore;
+using Socialize.Api.Modules.Workspaces.Data;
+
+namespace Socialize.Api.Modules.Channels.Data;
+
+internal static class ChannelModelConfiguration
+{
+    public static ModelBuilder ConfigureChannelsModule(this ModelBuilder modelBuilder)
+    {
+        modelBuilder.Entity<Channel>(channel =>
+        {
+            channel.ToTable("Channels");
+            channel.HasKey(x => x.Id);
+            channel.Property(x => x.Name).HasMaxLength(256).IsRequired();
+            channel.Property(x => x.Network).HasMaxLength(64).IsRequired();
+            channel.Property(x => x.Handle).HasMaxLength(256);
+            channel.Property(x => x.ExternalUrl).HasMaxLength(2048);
+            channel.Property(x => x.CreatedAt)
+                .ValueGeneratedOnAdd()
+                .HasDefaultValueSql("CURRENT_TIMESTAMP");
+            channel.HasIndex(x => x.WorkspaceId);
+            channel.HasIndex(x => new { x.WorkspaceId, x.Network, x.Name }).IsUnique();
+            channel.HasOne<Workspace>()
+                .WithMany()
+                .HasForeignKey(x => x.WorkspaceId)
+                .OnDelete(DeleteBehavior.Restrict);
+        });
+
+        return modelBuilder;
+    }
+}