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

infogenie-backend-go/cmd/server/main.go

@@ -7,6 +7,7 @@ import (
 	"github.com/gin-gonic/gin"
 
 	"infogenie-backend/config"
+	"infogenie-backend/internal/cache"
 	"infogenie-backend/internal/database"
 	"infogenie-backend/internal/router"
 )
@@ -23,6 +24,13 @@ func main() {
 		log.Fatalf("数据库初始化失败: %v", err)
 	}
 
+	if err := cache.Init(cfg.Redis); err != nil {
+		log.Fatalf("Redis 初始化失败: %v", err)
+	}
+	if cfg.Redis.Enabled {
+		log.Printf("Redis 已启用: %s DB=%d prefix=%s TTL=%s", cfg.Redis.Addr, cfg.Redis.DB, cfg.Redis.KeyPrefix, cfg.Redis.SiteTTL)
+	}
+
 	if err := database.AutoMigrate(); err != nil {
 		log.Fatalf("数据库迁移失败: %v", err)
 	}