security: stop tracking env files; admin gate via VITE_SITE_ADMIN_GATE; Redis/cache/docs

Remove InfoGenie-frontend and Go .env from version control; add .env.example templates; ignore .claude local settings. Admin UI reads site gate from env only. Note: rotate secrets if repo history was ever public.

Made-with: Cursor

.gitignore

@@ -5,6 +5,7 @@ debug-logs/
 # IDE / OS
 .idea/
 .vscode/
+.claude/settings.local.json
 .DS_Store
 Thumbs.db
 
@@ -31,3 +32,10 @@ infogenie-backend-go/go.work*
 InfoGenie-backend/.env
 .env.local
 .env.*.local
+**/.env
+**/.env.development
+**/.env.production
+**/.env.local
+# 允许提交模板（勿填真实密钥）
+!infogenie-frontend/.env.example
+!infogenie-backend-go/.env.example