feat: 实现配置校验与运维命令及优雅停机

cmd/nixmsg/checkconfig.go

@@ -0,0 +1,24 @@
+package main
+
+import (
+	"fmt"
+	"os"
+
+	"git.asio.asia/nixevol/NixMsg/internal/config"
+)
+
+func cmdCheckConfig(args []string) error {
+	path := config.PathFromEnv()
+	if len(args) > 0 {
+		path = args[0]
+	}
+	cfg, err := config.Load(path)
+	if err != nil {
+		return err
+	}
+	if err := cfg.Validate(); err != nil {
+		return err
+	}
+	fmt.Fprintln(os.Stderr, "config ok")
+	return nil
+}