chore: 初始提交 Fonu 1.0.2

- 公网反代：Nginx 状态卡片（版本 / 运行状态 / 配置校验 / 端口监听）
- 部署设置第一、二梯队（HTTPS 开关、安全头、限流、连接数、仅中国大陆 IP）
- 隧道检测兼容 frps v0.68 / v0.71（V2 与旧版端点）
- 恢复被清空的 internal/frp/store.go、internal/api/ddns_handler.go、web/src/views/DdnsView.vue

cmd/fonu/main.go

@@ -0,0 +1,54 @@
+package main
+
+import (
+	"context"
+	"embed"
+	"errors"
+	"io/fs"
+	"log"
+	"net/http"
+	"os"
+	"os/signal"
+	"syscall"
+	"time"
+
+	"github.com/fonu/fonu/internal/app"
+	"github.com/fonu/fonu/internal/config"
+)
+
+//go:embed all:web/dist
+var webDist embed.FS
+
+func main() {
+	cfg := config.Load()
+	migrationsDir, err := app.ResolveMigrationsDir()
+	if err != nil {
+		log.Fatalf("resolve migrations: %v", err)
+	}
+
+	staticFS, err := fs.Sub(webDist, "web/dist")
+	if err != nil {
+		log.Fatalf("load static files: %v", err)
+	}
+
+	application, err := app.New(cfg, staticFS, migrationsDir)
+	if err != nil {
+		log.Fatalf("start application: %v", err)
+	}
+
+	go func() {
+		if err := application.Run(); err != nil && !errors.Is(err, http.ErrServerClosed) {
+			log.Fatalf("server error: %v", err)
+		}
+	}()
+
+	stop := make(chan os.Signal, 1)
+	signal.Notify(stop, syscall.SIGINT, syscall.SIGTERM)
+	<-stop
+
+	ctx, cancel := context.WithTimeout(context.Background(), 15*time.Second)
+	defer cancel()
+	if err := application.Shutdown(ctx); err != nil {
+		log.Printf("shutdown error: %v", err)
+	}
+}