fix: confirm email changes and enforce clean backend build

backend/src/Socialize.Api/Modules/Identity/Services/AccessTokenFactory.cs

@@ -16,13 +16,7 @@ internal sealed class AccessTokenFactory(
         IList<string> roles = await userManager.GetRolesAsync(user);
         IList<Claim> claims = await userManager.GetClaimsAsync(user);
 
-        string persona = roles.Contains(KnownRoles.Manager, StringComparer.Ordinal)
-            ? KnownRoles.Manager
-            : roles.Contains(KnownRoles.Client, StringComparer.Ordinal)
-                ? KnownRoles.Client
-                : roles.Contains(KnownRoles.Provider, StringComparer.Ordinal)
-                    ? KnownRoles.Provider
-                    : KnownRoles.WorkspaceMember;
+        string persona = GetPersona(roles);
 
         List<Claim> tokenClaims = [.. claims, new Claim(KnownClaims.Persona, persona)];
 
@@ -40,4 +34,24 @@ internal sealed class AccessTokenFactory(
             roles,
             tokenClaims);
     }
+
+    private static string GetPersona(IList<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;
+    }
 }

backend/src/Socialize.Api/Modules/Identity/Services/EmailVerificationService.cs

@@ -58,4 +58,52 @@ internal sealed class EmailVerificationService(
              </div>
              """);
     }
+
+    public async Task SendEmailChangeConfirmationAsync(
+        User user,
+        string newEmail)
+    {
+        string token = await userManager.GenerateChangeEmailTokenAsync(user, newEmail);
+        string encodedEmail = HttpUtility.UrlEncode(newEmail);
+        string encodedToken = HttpUtility.UrlEncode(token);
+        string confirmationLink =
+            $"{options.Value.FrontendBaseUrl}/verify-email?changeEmail=true&userId={user.Id}&email={encodedEmail}&token={encodedToken}";
+
+        await emailSender.SendEmailAsync(
+            newEmail,
+            "Confirm your new email address",
+            $"""
+             <div style="font-family: Arial, sans-serif; max-width: 600px; margin: 0 auto; padding: 20px; color: #333;">
+               <h1 style="color: #2c3e50; margin-bottom: 20px;">Confirm your new email address</h1>
+
+               <p style="font-size: 16px; line-height: 1.5; margin-bottom: 25px;">
+                 Please confirm this email address for your Socialize account by clicking the button below:
+               </p>
+
+               <div style="text-align: center; margin: 30px 0;">
+                 <a href='{confirmationLink}'
+                    style="background-color: #3498db;
+                           color: white;
+                           text-decoration: none;
+                           padding: 12px 24px;
+                           border-radius: 4px;
+                           font-weight: bold;
+                           display: inline-block;
+                           box-shadow: 0 2px 5px rgba(0,0,0,0.1);">
+                   Confirm Email Address
+                 </a>
+               </div>
+
+               <p style="font-size: 14px; color: #7f8c8d; margin-top: 30px;">
+                 If you did not request this change, please ignore this email.
+               </p>
+
+               <p style="font-size: 14px; color: #7f8c8d; margin-top: 20px;">
+                 If the button doesn't work, you can copy and paste this link into your browser:
+                 <br>
+                 <a href='{confirmationLink}' style="color: #3498db; word-break: break-all;">{confirmationLink}</a>
+               </p>
+             </div>
+             """);
+    }
 }