Fix chat message and photo sending

- Remove broken transformRequest that crashed with Axios 1.x (headers.post undefined)
- Guard window.Echo.socketId() to avoid TypeError before socket connects
- Wrap broadcast() in try/catch so Reverb downtime does not cause 500 errors

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

app/Http/Controllers/ChatController.php

@@ -99,7 +99,11 @@ class ChatController extends Controller
 
         $message->load('sender');
 
-        broadcast(new MessageSent($message))->toOthers();
+        try {
+            broadcast(new MessageSent($message))->toOthers();
+        } catch (\Exception $e) {
+            \Log::warning('Chat broadcast failed: ' . $e->getMessage());
+        }
 
         $message->created_at = $message->created_at->format('H:i');