fix: update config wizard help text to reference ./.chat-sessions

- Updated auto_save help text from ~/agent-conversations to ./.chat-sessions
- Ensures wizard flow matches new session storage location
- Completes session storage location migration

Author: jwesleye

src/basic_agent_chat_loop/components/config_wizard.py

@@ -352,7 +352,7 @@ def _configure_features(self):
         self.config["features"]["auto_save"] = self._prompt_bool(
             "Automatically save conversations on exit?",
             default=current_auto_save,
-            help_text="Saves each conversation to ~/agent-conversations as markdown",
+            help_text="Saves each conversation to ./.chat-sessions as markdown",
         )
 
         # show_tokens