Disable chat deletion

server/QMax.Api/Controllers/AdminController.cs

@@ -367,33 +367,11 @@ public sealed class AdminController(
     }
 
     [HttpDelete("api/chats/{id:guid}")]
-    public async Task<IActionResult> DeleteChat(Guid id, [FromQuery] string? pairingCode, CancellationToken cancellationToken)
+    public IActionResult DeleteChat(Guid id, [FromQuery] string? pairingCode)
     {
         if (!IsPairingCodeValid(pairingCode)) return Unauthorized();
 
-        var chat = await db.Chats
-            .Include(x => x.Messages)
-            .ThenInclude(x => x.Attachments)
-            .FirstOrDefaultAsync(x => x.Id == id, cancellationToken);
-        if (chat is null)
-        {
-            return NotFound();
-        }
-
-        var files = chat.Messages
-            .SelectMany(x => x.Attachments)
-            .Select(x => storage.GetPath(x.StorageFileName))
-            .Where(System.IO.File.Exists)
-            .ToArray();
-
-        db.Chats.Remove(chat);
-        await db.SaveChangesAsync(cancellationToken);
-        foreach (var file in files)
-        {
-            System.IO.File.Delete(file);
-        }
-
-        return NoContent();
+        return BadRequest("Chat deletion is disabled because MAX does not remove chats from the web client.");
     }
 
     private async Task<AdminStatusDto> BuildStatusAsync(CancellationToken cancellationToken)