fix: 嵌入式前端正确服务world.json等静态文件

- 修复/install路由返回登录页问题
- checkConfigFile只检查数据目录
- setupEmbeddedFrontend正确响应项目目录下文件

backend/cmd/main.go

@@ -261,17 +261,29 @@ func setupEmbeddedFrontend(r *gin.Engine) {
 		return
 	}
 
-	r.NoRoute(func(c *gin.Context) {
-		if c.Request.Method == "GET" && !strings.HasPrefix(c.Request.URL.Path, "/api/") {
-			serveIndexHTML(c, string(indexHTML))
-			return
-		}
-		c.JSON(404, gin.H{"error": "not found"})
-	})
+	fileServer := http.FileServer(http.FS(distFS))
 
 	r.GET("/assets/*filepath", func(c *gin.Context) {
 		c.FileFromFS(c.Request.URL.Path, http.FS(distFS))
 	})
+
+	r.GET("/*filepath", func(c *gin.Context) {
+		path := c.Param("filepath")
+		if path == "" || path == "/" {
+			serveIndexHTML(c, string(indexHTML))
+			return
+		}
+		path = strings.TrimPrefix(path, "/")
+
+		f, err := distFS.Open(path)
+		if err == nil {
+			f.Close()
+			fileServer.ServeHTTP(c.Writer, c.Request)
+			return
+		}
+
+		serveIndexHTML(c, string(indexHTML))
+	})
 }
 
 func serveIndexHTML(c *gin.Context, indexHTML string) {

backend/internal/router/install/install.go

@@ -243,16 +243,8 @@ func handleSetup(c *gin.Context) {
 func checkConfigFile() bool {
 	dataDir := config.GetDataDir()
 	configPath := filepath.Join(dataDir, "config.yaml")
-	if _, err := os.Stat(configPath); err == nil {
-		return true
-	}
-	paths := []string{"config.yaml", "./config/config.yaml"}
-	for _, p := range paths {
-		if _, err := os.Stat(p); err == nil {
-			return true
-		}
-	}
-	return false
+	_, err := os.Stat(configPath)
+	return err == nil
 }
 
 func checkAdminExists() bool {