feat: 初始化平台总后台与核心API

backend/cmd/api/main.go

@@ -0,0 +1,58 @@
+// 平台核心 API 的启动入口。
+package main
+
+import (
+	"context"
+	"errors"
+	"log/slog"
+	"net/http"
+	"os"
+	"os/signal"
+	"syscall"
+	"time"
+
+	"git.apinb.com/heqiapp/platforms/backend/internal/config"
+	"git.apinb.com/heqiapp/platforms/backend/internal/database"
+	platformhttp "git.apinb.com/heqiapp/platforms/backend/internal/http"
+)
+
+func main() {
+	appConfig := config.Load()
+	logger := slog.New(slog.NewTextHandler(os.Stdout, nil))
+
+	pool, err := database.Connect(context.Background(), appConfig.DatabaseURL)
+	if err != nil {
+		logger.Error("连接 PostgreSQL 失败", "error", err)
+		os.Exit(1)
+	}
+	defer pool.Close()
+
+	if err := database.MigrateAndSeed(context.Background(), pool); err != nil {
+		logger.Error("初始化数据库失败", "error", err)
+		os.Exit(1)
+	}
+
+	server := &http.Server{
+		Addr:              ":" + appConfig.Port,
+		Handler:           platformhttp.NewRouter(pool, logger),
+		ReadHeaderTimeout: 5 * time.Second,
+	}
+
+	go func() {
+		logger.Info("平台核心 API 已启动", "address", server.Addr)
+		if err := server.ListenAndServe(); err != nil && !errors.Is(err, http.ErrServerClosed) {
+			logger.Error("HTTP 服务异常退出", "error", err)
+			os.Exit(1)
+		}
+	}()
+
+	stop := make(chan os.Signal, 1)
+	signal.Notify(stop, syscall.SIGINT, syscall.SIGTERM)
+	<-stop
+
+	shutdownContext, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+	defer cancel()
+	if err := server.Shutdown(shutdownContext); err != nil {
+		logger.Error("HTTP 服务停止失败", "error", err)
+	}
+}