fix: sidebar accordion + koja slug + support ticket LINQ crash

Sidebar:
- All groups start collapsed on first load (v4 storage key resets old state)
- Opening one group closes all others (accordion)
- Navigating to a section opens only that section's group

Koja slug:
- SlugHelper: Persian->Latin transliteration, slug validation
- Registration accepts optional custom slug; auto-derives from cafe name
- Slug can be updated from dashboard Settings -> Profile
- Settings PATCH validates uniqueness (SLUG_TAKEN) and format (INVALID_SLUG)
- koja.meezi.ir/{slug} now redirects to /fa/cafe/{slug} (short URL support)

Bug fix:
- SupportTicketService: cafeId/status filters applied before Select() projection
  to fix EF "could not be translated" crash on the support tickets page

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/Meezi.Infrastructure/Services/SupportTicketService.cs

@@ -50,8 +50,10 @@ public class SupportTicketService : ISupportTicketService
         string cafeId,
         CancellationToken cancellationToken = default)
     {
-        return await QueryTickets()
-            .Where(t => t.CafeId == cafeId)
+        // NOTE: The Where MUST be applied on the EF entity set BEFORE the Select projection.
+        // Applying Where() after Select() onto a DTO record causes an EF translation error
+        // because EF can't translate "new SupportTicketDto(...).CafeId == x".
+        return await QueryTickets(cafeId)
             .OrderByDescending(t => t.UpdatedAt)
             .ToListAsync(cancellationToken);
     }
@@ -119,11 +121,10 @@ public class SupportTicketService : ISupportTicketService
         SupportTicketStatus? status,
         CancellationToken cancellationToken = default)
     {
-        var q = QueryTickets();
-        if (status.HasValue)
-            q = q.Where(t => t.Status == status.Value);
-
-        return await q.OrderByDescending(t => t.UpdatedAt).ToListAsync(cancellationToken);
+        // status filter is applied on the entity before projection — safe for EF translation.
+        return await QueryTickets(cafeId: null, status: status)
+            .OrderByDescending(t => t.UpdatedAt)
+            .ToListAsync(cancellationToken);
     }
 
     public async Task<SupportTicketDetailDto?> GetAdminAsync(
@@ -185,22 +186,36 @@ public class SupportTicketService : ISupportTicketService
         return await GetAdminAsync(ticketId, cancellationToken);
     }
 
-    private IQueryable<SupportTicketDto> QueryTickets() =>
-        _db.SupportTickets
-            .AsNoTracking()
-            .Select(t => new SupportTicketDto(
-                t.Id,
-                t.CafeId,
-                t.Cafe != null ? t.Cafe.Name : "",
-                t.Subject,
-                t.Status,
-                t.Priority,
-                t.CreatedByEmployeeId,
-                t.CreatedByEmployee != null ? t.CreatedByEmployee.Name : null,
-                t.AssignedAdminId,
-                t.CreatedAt,
-                t.UpdatedAt,
-                t.Messages.Count));
+    /// <summary>
+    /// Builds an EF-translatable query for support ticket list rows.
+    /// Filters are applied on the entity BEFORE the Select projection to avoid EF translation errors.
+    /// </summary>
+    private IQueryable<SupportTicketDto> QueryTickets(
+        string? cafeId = null,
+        SupportTicketStatus? status = null)
+    {
+        var q = _db.SupportTickets.AsNoTracking().AsQueryable();
+
+        // Apply entity-level filters BEFORE Select so EF can translate them.
+        if (cafeId is not null)
+            q = q.Where(t => t.CafeId == cafeId);
+        if (status.HasValue)
+            q = q.Where(t => t.Status == status.Value);
+
+        return q.Select(t => new SupportTicketDto(
+            t.Id,
+            t.CafeId,
+            t.Cafe != null ? t.Cafe.Name : "",
+            t.Subject,
+            t.Status,
+            t.Priority,
+            t.CreatedByEmployeeId,
+            t.CreatedByEmployee != null ? t.CreatedByEmployee.Name : null,
+            t.AssignedAdminId,
+            t.CreatedAt,
+            t.UpdatedAt,
+            t.Messages.Count));
+    }
 
     private static SupportTicketDto MapTicket(SupportTicket t) =>
         new(