From f0437139f3faeea169ffff1e16df2fe767fc5cd0 Mon Sep 17 00:00:00 2001
From: XingfenD <xingfen.fendy@outlook.com>
Date: Mon, 14 Sep 2026 19:36:57 +0800
Subject: [PATCH] fix(main): channel-based serve error instead of log.Fatalf in
 goroutine (B14)

---
 backend/cmd/webui/main.go | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/backend/cmd/webui/main.go b/backend/cmd/webui/main.go
index f487e59..2a01e5e 100644
--- a/backend/cmd/webui/main.go
+++ b/backend/cmd/webui/main.go
@@ -42,15 +42,25 @@ func main() {
 	sc := scanner.New(st, cfg, rdb)
 	go sc.Run(ctx)
 
+	serveErr := make(chan error, 1)
 	srv := &http.Server{Addr: cfg.Addr, Handler: api.NewRouter(cfg, st, rdb, sc),
 		ReadHeaderTimeout: 10 * time.Second}
 	go func() {
 		log.Printf("listening on %s", cfg.Addr)
 		if err := srv.ListenAndServe(); err != nil && !errors.Is(err, http.ErrServerClosed) {
-			log.Fatalf("serve: %v", err)
+			serveErr <- err
 		}
+		close(serveErr)
 	}()
-	<-ctx.Done()
+
+	// Wait for signal OR serve error.
+	select {
+	case <-ctx.Done():
+	case err := <-serveErr:
+		if err != nil {
+			log.Printf("serve: %v", err)
+		}
+	}
 	// stop() 先取消 ctx → scanner 循环退出;再等 HTTP 收尾。
 	// 在途 ScanLibraryByID(WithoutCancel)不受 ctx 控制,靠 redis 锁 TTL 兜底(已文档化的上限)。
 	stop()