Include WeChat account files in backup/restore

Adds /data/.hermes/weixin/ to the backup path mapping so WeChat
session tokens (context-tokens.json, sync.json) persist across restarts.

src/data_sync.py

@@ -60,6 +60,7 @@ class DatasetManager:
             'webui_dir': {'path': Path('/data/.hermes-web-ui'), 'skip_backup': False},
             'image_cache': {'path': self.hermes_home / 'image_cache', 'skip_backup': True},  # 图片缓存大
             'baoyu_skills': {'path': Path('/home/appuser/.baoyu-skills'), 'skip_backup': False},
+            'weixin': {'path': self.hermes_home / 'weixin', 'skip_backup': False},
         }
         
     def validate(self) -> bool:
@@ -254,6 +255,11 @@ class DatasetManager:
             if not webui_info.get('skip_backup') and webui_info['path'].exists():
                 shutil.copytree(webui_info['path'], self.temp_dir / 'webui', dirs_exist_ok=True)
             
+            # WeChat 会话凭据
+            weixin_info = self.path_mapping['weixin']
+            if not weixin_info.get('skip_backup') and weixin_info['path'].exists():
+                shutil.copytree(weixin_info['path'], self.temp_dir / 'weixin', dirs_exist_ok=True)
+
             # 确保空目录也能被 git/HF dataset 跟踪（git 不跟踪空目录）
             for subdir in ['memories', 'skills', 'sessions', 'cron', 'baoyu_skills']:
                 dirpath = self.temp_dir / subdir
@@ -385,6 +391,7 @@ class DatasetManager:
             'webui': self.path_mapping['webui_dir']['path'],
             'image_cache': self.path_mapping['image_cache']['path'],
             'baoyu_skills': self.path_mapping['baoyu_skills']['path'],
+            'weixin': self.path_mapping['weixin']['path'],
         }
         
         if not skip_restore: