feat(gui): Add 'Force Prune Logs' button to Log Management panel.

src/app_controller.py

@@ -328,6 +328,7 @@ class AppController:
    'btn_approve_tool': self._handle_approve_ask,
    'btn_approve_mma_step': lambda: self._handle_mma_respond(approved=True),
    'btn_approve_spawn': lambda: self._handle_mma_respond(approved=True),
+   'btn_prune_logs': self.cb_prune_logs,
   }
   self._predefined_callbacks: dict[str, Callable[..., Any]] = {
    '_test_callback_func_write_to_file': self._test_callback_func_write_to_file,
@@ -662,6 +663,11 @@ class AppController:
   self.is_viewing_prior_session = True
   self._set_status(f"viewing prior session: {Path(path).name} ({len(entries)} entries)")
 
+ def cb_prune_logs(self) -> None:
+  """Manually triggers the log pruning process."""
+  self._set_status("Pruning logs...")
+  self._prune_old_logs()
+
  def _load_active_project(self) -> None:
   """Loads the active project configuration, with fallbacks."""
   if self.active_project_path and Path(self.active_project_path).exists():