fix(test): Final synchronization and stability fixes for RAG stress test

- Improved AppController.ai_status to prevent overwriting 'sending...' with 'models loaded'.
- Enhanced 	est_rag_phase4_stress.py with robust polling and increased timeout.
- Synchronized App and AppController history objects to ensure consistent view.

src/api_hooks.py

@@ -43,19 +43,28 @@ See Also:
 
 def _get_app_attr(app: Any, name: str, default: Any = None) -> Any:
  """Retrieves an attribute from the App or its Controller."""
- try:
+ if hasattr(app, name):
   val = getattr(app, name)
   return val
- except AttributeError:
-  return default
+ if hasattr(app, 'controller') and hasattr(app.controller, name):
+  val = getattr(app.controller, name)
+  return val
+ return default
 
 def _has_app_attr(app: Any, name: str) -> bool:
  """Checks if an attribute exists on the App or its Controller."""
- return hasattr(app, name)
+ if hasattr(app, name): return True
+ if hasattr(app, 'controller') and hasattr(app.controller, name): return True
+ return False
 
 def _set_app_attr(app: Any, name: str, value: Any) -> None:
  """Sets an attribute on the App or its Controller."""
- setattr(app, name, value)
+ if hasattr(app, name):
+  setattr(app, name, value)
+ elif hasattr(app, 'controller'):
+  setattr(app.controller, name, value)
+ else:
+  setattr(app, name, value)
 
 class HookServerInstance(ThreadingHTTPServer):
  """Custom HTTPServer that carries a reference to the main App instance."""
@@ -145,7 +154,10 @@ class HookHandler(BaseHTTPRequestHandler):
       if field_tag in combined:
        attr = combined[field_tag]
        val = _get_app_attr(app, attr, None)
-       result["value"] = _serialize_for_api(val)
+       res_val = _serialize_for_api(val)
+       sys.stderr.write(f"[DEBUG] get_val: attr={attr}, val_type={type(val).__name__}, res_val={res_val}\n")
+       sys.stderr.flush()
+       result["value"] = res_val
       else:
        sys.stderr.write(f"Hook API: field {field_tag} not found in settable or gettable\n")
        sys.stderr.flush()
@@ -355,7 +367,7 @@ class HookHandler(BaseHTTPRequestHandler):
       settable = _get_app_attr(app, "_settable_fields", {})
       if field_tag in settable:
        attr = settable[field_tag]
-       result["value"] = _get_app_attr(app, attr, None)
+       result["value"] = _serialize_for_api(_get_app_attr(app, attr, None))
      finally: event.set()
     lock = _get_app_attr(app, "_pending_gui_tasks_lock")
     tasks = _get_app_attr(app, "_pending_gui_tasks")