Backup entire .hermes-web-ui directory (not just .token)

The hermes-web-ui stores session DB, channel configs (WeChat credentials),
device identity, and profile config in /data/.hermes-web-ui/. Only backing
up .token meant all channel login state was lost on restart.

src/data_sync.py

@@ -57,7 +57,7 @@ class DatasetManager:
             'state_db': {'path': self.hermes_home / 'state.db', 'skip_backup': False},
             'logs': {'path': self.hermes_home / 'logs', 'skip_backup': True},  # 日志大且不重要
             'cron': {'path': self.hermes_home / 'cron', 'skip_backup': False},
-            'webui_token': {'path': Path('/data/.hermes-web-ui') / '.token', 'skip_backup': False},
+            '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},
         }
@@ -249,11 +249,10 @@ class DatasetManager:
             if not baoyu_info.get('skip_backup') and baoyu_info['path'].exists():
                 shutil.copytree(baoyu_info['path'], self.temp_dir / 'baoyu_skills', dirs_exist_ok=True)
             
-            # WebUI 认证 Token
-            webui_info = self.path_mapping['webui_token']
+            # WebUI 完整目录（含认证 Token、会话、频道配置等）
+            webui_info = self.path_mapping['webui_dir']
             if not webui_info.get('skip_backup') and webui_info['path'].exists():
-                (self.temp_dir / 'webui').mkdir(exist_ok=True)
-                shutil.copy2(webui_info['path'], self.temp_dir / 'webui' / '.token')
+                shutil.copytree(webui_info['path'], self.temp_dir / 'webui', 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']:
@@ -383,7 +382,7 @@ class DatasetManager:
             'state/state.db': self.path_mapping['state_db']['path'],
             'logs': self.path_mapping['logs']['path'],
             'cron': self.path_mapping['cron']['path'],
-            'webui/.token': self.path_mapping['webui_token']['path'],
+            'webui': self.path_mapping['webui_dir']['path'],
             'image_cache': self.path_mapping['image_cache']['path'],
             'baoyu_skills': self.path_mapping['baoyu_skills']['path'],
         }