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/gui_2.py

@@ -380,35 +380,11 @@ class App:
  def __getattr__(self, name: str) -> Any:
   if name == 'controller':
    raise AttributeError(name)
-  try:
-   ctrl = object.__getattribute__(self, 'controller')
-  except AttributeError:
-   raise AttributeError(name)
-
-  if ctrl is not None:
-   try:
-    val = getattr(ctrl, name)
-    sys.stderr.write(f"[DEBUG __getattr__] name={name}, val_type={type(val).__name__}\n")
-    sys.stderr.flush()
-    return val
-   except AttributeError:
-    pass
-
-  raise AttributeError(f"'{type(self).__name__}' object has no attribute '{name}'")
+  return getattr(self.controller, name)
 
  def __setattr__(self, name: str, value: Any) -> None:
-  if name == 'controller':
-   object.__setattr__(self, name, value)
-   return
-
-  try:
-   # Use object.__getattribute__ to avoid recursion
-   ctrl = object.__getattribute__(self, 'controller')
-  except AttributeError:
-   ctrl = None
-
-  if ctrl is not None and hasattr(ctrl, name):
-   setattr(ctrl, name, value)
+  if name != 'controller' and hasattr(self, 'controller') and hasattr(self.controller, name):
+   setattr(self.controller, name, value)
   else:
    object.__setattr__(self, name, value)
 
@@ -696,7 +672,7 @@ class App:
   
    if show_content:
     h = 150 if is_standalone else 100
-    with imscope.child(f"thinking_content_{entry_index}", imgui.ImVec2(0, h), True):
+    with imscope.child(f"thinking_content_{entry_index}", 0, h, True):
      for idx, seg in enumerate(segments):
       content = seg.get("content", "")
       marker  = seg.get("marker", "thinking")
@@ -1014,7 +990,7 @@ class App:
      imgui.same_line()
      if imgui.button("Redo") and self.history.can_redo: self._handle_redo()
      imgui.separator()
-     with imscope.child("history_list", imgui.ImVec2(0, 0), True):
+     with imscope.child("history_list", 0, 0, True):
       history = self.history.get_history()
       if not history: imgui.text("No history available.")
       else: iterate_history()
@@ -2558,7 +2534,7 @@ class App:
   if not hasattr(self, 'files_screenshots_split'): self.files_screenshots_split = 0.65
   split_y = int(avail * self.files_screenshots_split)
   if imgui.collapsing_header("Files", imgui.TreeNodeFlags_.default_open):
-   with imscope.child("Files_child", imgui.ImVec2(-1, split_y), True):
+   with imscope.child("Files_child", -1, split_y, True):
     if not hasattr(self, 'files_last_selected'): self.files_last_selected = -1
     
     with imscope.table("files_table", 5, imgui.TableFlags_.resizable | imgui.TableFlags_.borders):
@@ -2647,7 +2623,7 @@ class App:
   imgui.separator()
   
   if imgui.collapsing_header("Screenshots", imgui.TreeNodeFlags_.default_open):
-   with imscope.child("Shots_child", imgui.ImVec2(-1, -1), True):
+   with imscope.child("Shots_child", -1, -1, True):
     for i, s in enumerate(self.screenshots):
      if imgui.button(f"x##s{i}"):
       self.screenshots.pop(i)
@@ -3751,7 +3727,7 @@ class App:
 
   with imscope.style_color(imgui.Col_.frame_bg, blink_color) if is_blinking else nullcontext():
    with imscope.style_color(imgui.Col_.child_bg, blink_color) if is_blinking else nullcontext():
-    with imscope.child("response_scroll_area", imgui.ImVec2(0, -40), True):
+    with imscope.child("response_scroll_area", 0, -40, True):
      with theme.ai_text_style():
       segments, parsed_response = thinking_parser.parse_thinking_trace(self.ai_response)
       if segments: