Add user profile fields and completion prompt

Added `FirstName`, `LastName`, and `Address` fields to `ApplicationUser` for extended user profiles. Updated `Index.razor` to include these fields in the profile form with validation. Introduced `ProfileCompletionService` to check profile completeness and added a prompt in `TopBar.razor` for incomplete profiles.

Created migration `20260518213355_AddUserProfileFields` to update the database schema. Updated `RegistryService` to use new fields for user display names. Registered `ProfileCompletionService` and `DbContextFactory` in `Program.cs`. Styled the profile completion banner in `TopBar.razor.css`.

src/BirthList.Web/Features/Registries/RegistryService.cs

@@ -95,18 +95,22 @@ internal sealed class RegistryService(RegistryDbContext registryDbContext, Appli
             .ToListAsync(cancellationToken)
             .ConfigureAwait(false);
 
-        var usersById = await applicationDbContext.Users
+        var users = await applicationDbContext.Users
             .Where(x => admins.Contains(x.Id))
-            .Select(x => new { x.Id, x.Email })
-            .ToDictionaryAsync(x => x.Id, x => x.Email, cancellationToken)
+            .Select(x => new { x.Id, x.Email, x.FirstName, x.LastName })
+            .ToListAsync(cancellationToken)
             .ConfigureAwait(false);
 
+        var usersById = users.ToDictionary(
+            x => x.Id,
+            x => BuildUserDisplayName(x.FirstName, x.LastName, x.Email, x.Id));
+
         return admins
             .Select(userId => new RegistryAdminDisplayModel
             {
                 UserId = userId,
-                DisplayName = usersById.TryGetValue(userId, out var email) && !string.IsNullOrWhiteSpace(email)
-                    ? email
+                DisplayName = usersById.TryGetValue(userId, out var displayName)
+                    ? displayName
                     : userId
             })
             .ToList();
@@ -180,12 +184,16 @@ internal sealed class RegistryService(RegistryDbContext registryDbContext, Appli
             userIds.Add(contribution.UserId);
         }
 
-        var usersById = await applicationDbContext.Users
+        var users = await applicationDbContext.Users
             .Where(x => userIds.Contains(x.Id))
-            .Select(x => new { x.Id, x.Email })
-            .ToDictionaryAsync(x => x.Id, x => x.Email ?? x.Id, cancellationToken)
+            .Select(x => new { x.Id, x.Email, x.FirstName, x.LastName })
+            .ToListAsync(cancellationToken)
             .ConfigureAwait(false);
 
+        var usersById = users.ToDictionary(
+            x => x.Id,
+            x => BuildUserDisplayName(x.FirstName, x.LastName, x.Email, x.Id));
+
         var purchasesByItemId = purchases
             .GroupBy(x => x.RegistryItemId)
             .ToDictionary(g => g.Key, g => g.ToList());
@@ -422,12 +430,16 @@ internal sealed class RegistryService(RegistryDbContext registryDbContext, Appli
             userIds.Add(contribution.UserId);
         }
 
-        var usersById = await applicationDbContext.Users
+        var users = await applicationDbContext.Users
             .Where(x => userIds.Contains(x.Id))
-            .Select(x => new { x.Id, x.Email })
-            .ToDictionaryAsync(x => x.Id, x => x.Email ?? x.Id, cancellationToken)
+            .Select(x => new { x.Id, x.Email, x.FirstName, x.LastName })
+            .ToListAsync(cancellationToken)
             .ConfigureAwait(false);
 
+        var usersById = users.ToDictionary(
+            x => x.Id,
+            x => BuildUserDisplayName(x.FirstName, x.LastName, x.Email, x.Id));
+
         var purchasesByItemId = purchases
             .GroupBy(x => x.RegistryItemId)
             .ToDictionary(g => g.Key, g => g.ToList());
@@ -508,12 +520,16 @@ internal sealed class RegistryService(RegistryDbContext registryDbContext, Appli
             userIds.Add(contribution.UserId);
         }
 
-        var usersById = await applicationDbContext.Users
+        var users = await applicationDbContext.Users
             .Where(x => userIds.Contains(x.Id))
-            .Select(x => new { x.Id, x.Email })
-            .ToDictionaryAsync(x => x.Id, x => x.Email ?? x.Id, cancellationToken)
+            .Select(x => new { x.Id, x.Email, x.FirstName, x.LastName })
+            .ToListAsync(cancellationToken)
             .ConfigureAwait(false);
 
+        var usersById = users.ToDictionary(
+            x => x.Id,
+            x => BuildUserDisplayName(x.FirstName, x.LastName, x.Email, x.Id));
+
         return new RegistryItemEditModel
         {
             Id = item.Id,
@@ -907,4 +923,20 @@ internal sealed class RegistryService(RegistryDbContext registryDbContext, Appli
         var fallback = Convert.ToHexString(SHA256.HashData(Encoding.UTF8.GetBytes(Guid.NewGuid().ToString("N")))).Substring(0, 16).ToLowerInvariant();
         return fallback;
     }
+
+    private static string BuildUserDisplayName(string? firstName, string? lastName, string? email, string userId)
+    {
+        var fullName = $"{firstName} {lastName}".Trim();
+        if (!string.IsNullOrWhiteSpace(fullName))
+        {
+            return fullName;
+        }
+
+        if (!string.IsNullOrWhiteSpace(email))
+        {
+            return email;
+        }
+
+        return userId;
+    }
 }