feat: 莫荷微信按需登录——消除未登录忙循环请求腾讯的风控诱因

- init.js: DISABLE_AUTO_LOGIN=true 时不自动 bot.start(), 导出 start/stop/isRunning
- 新增 route/bot.js: POST /api/bot/login|logout, GET /api/bot/status (按需触发登录)
- login.js: bot 未运行时不展示残留二维码, 显示开始登录按钮
- wechat4u wechat.js: checkLogin 忙循环加 3s 间隔+指数退避 (原来毫秒级轰炸 login.wx.qq.com)
- puppet-wechat4u: logout 后不自动 start (原来登出即自动重登)
- 补丁脚本: deploy/linux/wxbot_on_demand_login_patch.py (可重放, 容器重建后一键恢复)
- 文档: docs/WXBOT_ON_DEMAND_LOGIN.md
- agents_health_check/self_todo_executor: 禁用 wxBotWebhook 自动重启 (重启=重登触发风控)

gateway/scripts/agents_health_check.py

@@ -61,7 +61,7 @@ SERVICES = [
         "host": "127.0.0.1",
         "port": 3001,
         "health_url": None,  # TCP only
-        "fix_cmd": ["docker", "restart", "wxBotWebhook"],
+        "fix_cmd": None,  # 禁用自动重启: 重启=重登会触发微信风控, 改为人工处理
         "remote": False,
         "critical": True,
         "docker_name": "wxBotWebhook",

gateway/scripts/self_todo_executor.py

@@ -29,7 +29,7 @@ FIX_MAP = {
     "dashboard":             ["sudo", "systemctl", "restart", "agentsmeeting-dashboard"],
     "hermes_gateway_mohe":   ["sudo", "systemctl", "restart", "hermes-gateway@mohe"],
     "hermes_gateway_zhiwei": ["sudo", "systemctl", "restart", "hermes-gateway@zhiwei"],
-    "wechat_bridge":         ["docker", "restart", "wxBotWebhook"],
+    "wechat_bridge":         None,  # 禁用自动重启: 重启=重登触发风控, 人工处理
     # 远程服务无本地修复命令
     "xmpp_bot_xxm":          None,
     "article_processor":     None,