feat: M0-M2 骨架落地（服务端/前端/宿主/数据库/积分引擎）

- server: Go 单二进制骨架，embed 内嵌前端，配置/迁移/HTTP 路由
- store: system.db + event.db 两套迁移，业务表 + 种子数据
- domain: 积分引擎（并列三口径/计分通道/流水/排名/破纪录）+ 68 个测试
- web: Vite + Vue 三入口骨架 + shared 层（类型/API/WebSocket 客户端）
- console: Electron 宿主骨架（选屏/防熄屏/进程守护/托盘）

server/main.go

@@ -0,0 +1,74 @@
+// Command scoreboard 是赛事积分榜系统的服务端。
+package main
+
+import (
+	"context"
+	"errors"
+	"flag"
+	"fmt"
+	"log/slog"
+	"net/http"
+	"os"
+	"os/signal"
+	"syscall"
+	"time"
+
+	"git.yeij.top/AskaEth/Scoreboard/server/internal/config"
+	"git.yeij.top/AskaEth/Scoreboard/server/internal/httpapi"
+	"git.yeij.top/AskaEth/Scoreboard/server/internal/store"
+)
+
+// version 由构建时注入：-ldflags "-X main.version=..."
+var version = "dev"
+
+func main() {
+	configPath := flag.String("config", "config.yaml", "配置文件路径")
+	flag.Parse()
+
+	cfg, err := config.Load(*configPath)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "加载配置失败: %v\n", err)
+		os.Exit(1)
+	}
+
+	logger := slog.New(slog.NewTextHandler(os.Stdout, &slog.HandlerOptions{Level: cfg.Log.SlogLevel()}))
+	slog.SetDefault(logger)
+
+	st, err := store.Open(cfg.DataDir)
+	if err != nil {
+		logger.Error("打开数据库失败", "err", err)
+		os.Exit(1)
+	}
+	defer func() { _ = st.Close() }()
+
+	if err := st.Migrate(); err != nil {
+		logger.Error("数据库迁移失败", "err", err)
+		os.Exit(1)
+	}
+	logger.Info("数据库就绪", "dataDir", cfg.DataDir)
+
+	srv := &http.Server{
+		Addr:              cfg.Server.Addr(),
+		Handler:           httpapi.New(httpapi.Options{Logger: logger, Version: version}),
+		ReadHeaderTimeout: 10 * time.Second,
+	}
+
+	go func() {
+		logger.Info("服务启动", "addr", srv.Addr, "version", version)
+		if err := srv.ListenAndServe(); err != nil && !errors.Is(err, http.ErrServerClosed) {
+			logger.Error("服务异常退出", "err", err)
+			os.Exit(1)
+		}
+	}()
+
+	ctx, stop := signal.NotifyContext(context.Background(), os.Interrupt, syscall.SIGTERM)
+	defer stop()
+	<-ctx.Done()
+
+	logger.Info("正在关闭…")
+	shutdownCtx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+	defer cancel()
+	if err := srv.Shutdown(shutdownCtx); err != nil {
+		logger.Error("关闭超时", "err", err)
+	}
+}