初始提交：姜十三论坛 Jiang13 Forum

轻量自用论坛，Go 单二进制 + React SPA 内嵌 + SQLite。

Co-authored-by: Cursor <cursoragent@cursor.com>

cmd/jiang13/main.go

@@ -0,0 +1,76 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"io"
+	"log"
+	"net/http"
+	"os"
+	"os/signal"
+	"syscall"
+	"time"
+
+	"github.com/jiang13/forum/config"
+	"github.com/jiang13/forum/model"
+	"github.com/jiang13/forum/router"
+)
+
+func main() {
+	cfg, err := config.Parse()
+	if err != nil {
+		log.Fatalf("配置解析失败: %v", err)
+	}
+
+	// 日志同时输出到控制台和文件
+	logFile, err := os.OpenFile(cfg.LogFile, os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0644)
+	if err != nil {
+		log.Fatalf("打开日志文件失败: %v", err)
+	}
+	defer logFile.Close()
+	log.SetOutput(io.MultiWriter(os.Stdout, logFile))
+	log.SetFlags(log.Ldate | log.Ltime | log.Lshortfile)
+
+	log.Println("========================================")
+	log.Println("  姜十三论坛 Jiang13 Forum 启动中...")
+	log.Println("========================================")
+
+	// 初始化数据库
+	if err := model.InitDB(cfg.DBPath()); err != nil {
+		log.Fatalf("数据库初始化失败: %v", err)
+	}
+
+	// 设置路由
+	engine, err := router.Setup(cfg)
+	if err != nil {
+		log.Fatalf("路由初始化失败: %v", err)
+	}
+
+	addr := fmt.Sprintf(":%d", cfg.Port)
+	srv := &http.Server{
+		Addr:    addr,
+		Handler: engine,
+	}
+
+	// 优雅关机
+	go func() {
+		sigCh := make(chan os.Signal, 1)
+		signal.Notify(sigCh, syscall.SIGINT, syscall.SIGTERM)
+		<-sigCh
+		log.Println("收到关机信号，正在优雅关闭...")
+		ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+		defer cancel()
+		if err := srv.Shutdown(ctx); err != nil {
+			log.Printf("HTTP 服务关闭异常: %v", err)
+		}
+	}()
+
+	log.Printf("姜十三论坛已启动: http://localhost%s", addr)
+	log.Printf("后台管理地址: http://localhost%s/admin/dashboard", addr)
+	log.Printf("数据目录: %s", cfg.DataDir)
+
+	if err := srv.ListenAndServe(); err != nil && err != http.ErrServerClosed {
+		log.Fatalf("HTTP 服务异常: %v", err)
+	}
+	log.Println("姜十三论坛已安全退出")
+}