feat(modules): add guanghu-panel-kit reusable modules + two-system causal chain

光湖子系统面板模块包（胖头鱼/守望两系统沉淀）：
- panel/server.js 配置驱动审批面板（登录门/签字/写入窗口/部署通道/唤醒导航）
- deploy/verify-and-deploy.py 部署校验Agent（地图/因果链/范围/完整性，0或100）
- hooks/pre-receive-review.template 推送审核钩子模板
- frontend 两套门面样例（湖绿深色/宠物暖色玻璃动态）
- CAUSAL-CHAIN-20260806.hdlp 两系统建设完整因果链

modules/guanghu-panel-kit/panel/config.example.json

@@ -0,0 +1,24 @@
+{
+  "node_id": "MM-GZ-001",
+  "subsystem": "守望语言子系统 · 宠物行业",
+  "human_name": "毛毛",
+  "human_accounts": ["maomao"],
+  "personas": ["yaoyan", "yaoshi"],
+  "repo": "maomao/maomao-fifth-domain",
+  "default_branch": "guanghu/main",
+  "deploy_branch": "deploy",
+  "domain": "https://maomao.guanghulab.com",
+  "domain_host": "maomao.guanghulab.com",
+  "forgejo_port": 3002,
+  "panel_port": 3003,
+  "node_root": "/srv/guanghu/mm-gz-001",
+  "admin_token_file": "/srv/guanghu/mm-gz-001/panel/admin-token",
+  "sessions_file": "/srv/guanghu/mm-gz-001/panel/sessions.json",
+  "access_dir": "/srv/guanghu/mm-gz-001/access",
+  "export_dir": "/srv/guanghu/mm-gz-001/export",
+  "deploy_runs_dir": "/srv/guanghu/mm-gz-001/deploy-agent/runs",
+  "deploy_script": "/srv/guanghu/mm-gz-001/deploy-agent/bin/verify-and-deploy.py",
+  "writer_user": "mm-writer",
+  "watch_services": ["guanghu-mm-forgejo.service", "guanghu-mm-tunnel.service", "guanghu-mm-panel.service"],
+  "writeback_paths": ["guanghu-nodes/MM-GZ-001/imports/notion", "guanghu-nodes/MM-GZ-001/contributions", "guanghu-nodes/MM-GZ-001/personas"]
+}