Add real workspace channels

docs/FEATURES/channels.md

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+# Channels
+
+Channels are configured social destinations inside a workspace. They represent the account, handle, page, feed, newsletter, or other publication destination where content will eventually be handed off for publishing.
+
+Channels are workspace-owned data. Organization-owned connectors may provide credentials for external systems, but the workspace owns which destinations are available for content planning.
+
+## Model
+
+A channel has:
+
+- `id`
+- `workspaceId`
+- `name`
+- `network`
+- optional `handle`
+- optional `externalUrl`
+- `createdAt`
+
+`network` is a controlled string matching the frontend channel network options:
+
+- `Instagram`
+- `TikTok`
+- `Facebook`
+- `LinkedIn`
+- `YouTube`
+- `X`
+- `Reddit`
+- `Website`
+
+Channel names must be unique inside a workspace for the same network.
+
+## Behavior
+
+- Authenticated users with workspace access can list channels for their active workspace.
+- Workspace managers can create channels.
+- Content planning uses configured channels as selectable destinations.
+- Development seed data should create real workspace channels instead of relying on content target labels as fake channels.
+
+## Not In Scope
+
+- External connector credentials.
+- Publishing directly to social networks.
+- Channel deletion, archiving, or editing.

docs/TASKS/content/002-content-detail-back-navigation.md

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+# Task: Add content detail back navigation
+
+## Goal
+
+Make it easy to return to the Content calendar or upcoming list after opening a content item detail page.
+
+## Scope
+
+- Add a visible back control to `ContentItemDetailView`.
+- Preserve the originating Content page view state when navigating from calendar or upcoming entries.
+- Keep the change frontend-only.
+
+## Relevant Files
+
+- `frontend/src/features/content/views/ContentItemsView.vue`
+- `frontend/src/features/content/views/ContentItemDetailView.vue`
+
+## Validation
+
+```bash
+cd frontend
+npm run build
+```

docs/TASKS/content/003-real-workspace-channels.md

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+# Task: Add real workspace channels
+
+## Feature
+
+`docs/FEATURES/channels.md`
+
+## Goal
+
+Replace frontend-derived fake channels with real workspace-owned channel records served by the backend API.
+
+## Scope
+
+- Add a backend `Channels` module with a `Channel` table.
+- Add list and create endpoints for workspace channels.
+- Seed development channels and align seeded content publication targets to those configured channel names.
+- Update the frontend channels store to load and create channels through the API.
+- Keep the Channels page UI shape intact.
+
+## Relevant Files
+
+- `backend/src/Socialize.Api/Data/AppDbContext.cs`
+- `backend/src/Socialize.Api/Modules/Channels/`
+- `backend/src/Socialize.Api/Infrastructure/Development/DevelopmentSeedExtensions.cs`
+- `frontend/src/features/channels/stores/channelsStore.js`
+- `docs/FEATURES/channels.md`
+
+## Validation
+
+```bash
+dotnet build backend/Socialize.slnx
+dotnet test backend/Socialize.slnx
+cd frontend
+npm run build
+```