fix: Robustness improvements for RAG tests and GUI stability

- Added import sys to src/api_hook_client.py.
- Fixed App.__getattr__ to use direct attribute access on controller to avoid recursion.
- Simplified _get_app_attr and _has_app_attr in src/api_hooks.py.
- Centralized RAG and symbol enrichment in AppController._handle_request_event.
- Updated 	ests/test_symbol_parsing.py to match the new enrichment flow.
- Removed redundant task appending from i_status and mma_status setters.
- Improved _sync_rag_engine to only set 'ready' status after indexing is confirmed.
- Updated 	est_status_encapsulation.py to reflect setter changes.

src/api_hooks.py

@@ -43,28 +43,19 @@ See Also:
 
 def _get_app_attr(app: Any, name: str, default: Any = None) -> Any:
  """Retrieves an attribute from the App or its Controller."""
- if hasattr(app, name):
+ try:
   val = getattr(app, name)
   return val
- if hasattr(app, 'controller') and hasattr(app.controller, name):
-  val = getattr(app.controller, name)
-  return val
- return default
+ except AttributeError:
+  return default
 
 def _has_app_attr(app: Any, name: str) -> bool:
  """Checks if an attribute exists on the App or its Controller."""
- if hasattr(app, name): return True
- if hasattr(app, 'controller') and hasattr(app.controller, name): return True
- return False
+ return hasattr(app, name)
 
 def _set_app_attr(app: Any, name: str, value: Any) -> None:
  """Sets an attribute on the App or its Controller."""
- if hasattr(app, name):
-  setattr(app, name, value)
- elif hasattr(app, 'controller'):
-  setattr(app.controller, name, value)
- else:
-  setattr(app, name, value)
+ setattr(app, name, value)
 
 class HookServerInstance(ThreadingHTTPServer):
  """Custom HTTPServer that carries a reference to the main App instance."""
@@ -93,6 +84,7 @@ class HookHandler(BaseHTTPRequestHandler):
   """Handles GET requests by routing to the appropriate state provider."""
   try:
    app = self.server.app
+   print(f'[HOOKS] GET {self.path}')
    session_logger.log_api_hook("GET", self.path, "")
    if self.path == "/status":
     self.send_response(200)
@@ -152,9 +144,10 @@ class HookHandler(BaseHTTPRequestHandler):
       combined = {**settable, **gettable}
       if field_tag in combined:
        attr = combined[field_tag]
-       result["value"] = _get_app_attr(app, attr, None)
+       val = _get_app_attr(app, attr, None)
+       result["value"] = _serialize_for_api(val)
       else:
-       sys.stderr.write(f"[DEBUG] Hook API: field {field_tag} not found in settable or gettable\n")
+       sys.stderr.write(f"Hook API: field {field_tag} not found in settable or gettable\n")
        sys.stderr.flush()
      finally: event.set()
     lock = _get_app_attr(app, "_pending_gui_tasks_lock")