feat(controller): Add current_provider property to AppController

src/app_controller.py

@@ -659,7 +659,18 @@ class AppController:
      dialog._condition.notify_all()
     return True
   return False
+ @property
+ def current_provider(self) -> str:
+  return self._current_provider
 
+ @current_provider.setter
+ def current_provider(self, value: str) -> None:
+  if value != self._current_provider:
+   self._current_provider = value
+   ai_client.reset_session()
+   ai_client.set_provider(value, self.current_model)
+   self._token_stats = {}
+   self._token_stats_dirty = True
 
  @property
  def current_model(self) -> str: