fix(controller): Add stop_services() and dialog imports for GUI decoupling

- Add AppController.stop_services() to clean up AI client and event loop
- Add ConfirmDialog, MMAApprovalDialog, MMASpawnApprovalDialog imports to gui_2.py
- Fix test mocks for MMA dashboard and approval indicators
- Add retry logic to conftest.py for Windows file lock cleanup

tests/conftest.py

@@ -181,8 +181,12 @@ def live_gui() -> Generator[tuple[subprocess.Popen, str], None, None]:
  # 1. Create a isolated workspace for the live GUI
  temp_workspace = Path("tests/artifacts/live_gui_workspace")
  if temp_workspace.exists():
-  shutil.rmtree(temp_workspace)
- temp_workspace.mkdir(parents=True, exist_ok=True)
+  for _ in range(5):
+   try:
+    shutil.rmtree(temp_workspace)
+    break
+   except PermissionError:
+    time.sleep(0.5)
  
  # Create minimal project files to avoid cluttering root
  # NOTE: Do NOT create config.toml here - we use SLOP_CONFIG env var
@@ -276,8 +280,14 @@ def live_gui() -> Generator[tuple[subprocess.Popen, str], None, None]:
    time.sleep(0.5)
   except: pass
   kill_process_tree(process.pid)
+  time.sleep(1.0)
   log_file.close()
-  # Cleanup temp workspace
-  try:
-   shutil.rmtree(temp_workspace)
-  except: pass
+  # Cleanup temp workspace with retry for Windows file locks
+  for _ in range(5):
+   try:
+    shutil.rmtree(temp_workspace)
+    break
+   except PermissionError:
+    time.sleep(0.5)
+   except:
+    break