实现代理节点功能，包括主程序入口、配置加载、心跳检测和状态管理，添加相关服务和API响应结构

atsf_agent/cmd/agent/main.go

@@ -1,3 +1,48 @@
 package main
 
-func main() {}
+import (
+	"context"
+	"flag"
+	"log"
+	"os/signal"
+	"syscall"
+
+	"atsflare-agent/internal/agent"
+	"atsflare-agent/internal/config"
+	"atsflare-agent/internal/heartbeat"
+	"atsflare-agent/internal/httpclient"
+	"atsflare-agent/internal/nginx"
+	"atsflare-agent/internal/state"
+	syncservice "atsflare-agent/internal/sync"
+)
+
+func main() {
+	configPath := flag.String("config", "./agent.json", "agent config path")
+	flag.Parse()
+
+	cfg, err := config.Load(*configPath)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	client := httpclient.New(cfg.ServerURL, cfg.AgentToken, cfg.RequestTimeout)
+	stateStore := state.NewStore(cfg.StatePath)
+	runner := &agent.Runner{
+		Config:           cfg,
+		StateStore:       stateStore,
+		HeartbeatService: heartbeat.New(client),
+		SyncService: syncservice.New(client, &nginx.Manager{
+			RouteConfigPath: cfg.RouteConfigPath,
+			Executor: &nginx.ShellExecutor{
+				Binary: cfg.NginxBinary,
+			},
+		}, stateStore),
+	}
+
+	ctx, stop := signal.NotifyContext(context.Background(), syscall.SIGINT, syscall.SIGTERM)
+	defer stop()
+
+	if err = runner.Run(ctx); err != nil && err != context.Canceled {
+		log.Fatal(err)
+	}
+}