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/deploy/deploy-config.example.json

@@ -0,0 +1,19 @@
+{
+  "api": "http://127.0.0.1:3002/api/v1",
+  "token_file": "/srv/guanghu/mm-gz-001/panel/admin-token",
+  "repo": "maomao/maomao-fifth-domain",
+  "bare": "/srv/guanghu/mm-gz-001/data/repositories/maomao/maomao-fifth-domain.git",
+  "runs_dir": "/srv/guanghu/mm-gz-001/deploy-agent/runs",
+  "receipts_dir": "/srv/guanghu/mm-gz-001/export/receipts",
+  "map_checks": [
+    {"path": "/srv/guanghu/mm-gz-001/config/app.ini"},
+    {"path": "/srv/guanghu/mm-gz-001/deploy-agent/policy.json", "contains": "MM-GZ-001"}
+  ],
+  "causal_paths": ["docs/", "contributions/"],
+  "allowed_prefix": ["docs/", "contributions/", "guanghu-nodes/MM-GZ-001/deploy/forgejo-custom/", "deploy-manifest.json"],
+  "services": ["guanghu-mm-forgejo.service", "guanghu-mm-tunnel.service"],
+  "sync_trees": [
+    {"source_prefix": "guanghu-nodes/MM-GZ-001/deploy/forgejo-custom/", "target": "/srv/guanghu/mm-gz-001/custom"}
+  ],
+  "restart_services": ["guanghu-mm-forgejo.service"]
+}