style: 统一代码格式化 (go fmt + 配置更新)

- 后端：应用 go fmt 自动格式化，统一代码风格
- 前端：更新 API 配置，完善类型安全
- 所有代码符合项目规范，准备生产部署

backend/cmd/api/main.go

@@ -29,8 +29,8 @@ func main() {
 
 	// 添加静态文件服务
 	server.AddRoute(rest.Route{
-		Method:  http.MethodGet,
-		Path:    "/uploads/*",
+		Method: http.MethodGet,
+		Path:   "/uploads/*",
 		Handler: func(w http.ResponseWriter, r *http.Request) {
 			http.StripPrefix("/uploads/", http.FileServer(http.Dir("uploads"))).ServeHTTP(w, r)
 		},

backend/cmd/migrate/main.go

@@ -95,7 +95,7 @@ func main() {
 			}
 			migrateSteps = len(pendingMigrations)
 		}
-		
+
 		if err := migrator.Migrate(migrateSteps); err != nil {
 			log.Fatalf("Migration failed: %v", err)
 		}
@@ -168,10 +168,10 @@ func showHelp() {
 
 func createMigrationTemplate(name string) {
 	// 生成版本号（基于当前时间）
-	version := fmt.Sprintf("%d_%06d", 
-		getCurrentTimestamp(), 
+	version := fmt.Sprintf("%d_%06d",
+		getCurrentTimestamp(),
 		getCurrentMicroseconds())
-	
+
 	template := fmt.Sprintf(`// Migration: %s
 // Description: %s
 // Version: %s
@@ -198,22 +198,22 @@ var migration_%s = Migration{
 -- ALTER TABLE user DROP COLUMN new_field; -- Note: SQLite doesn't support DROP COLUMN
 %s,
 }`,
-		name, name, version, 
+		name, name, version,
 		version, version, name,
 		"`", "`", "`", "`")
-	
+
 	filename := fmt.Sprintf("migrations/%s_%s.go", version, name)
-	
+
 	// 创建 migrations 目录
 	if err := os.MkdirAll("migrations", 0755); err != nil {
 		log.Fatalf("Failed to create migrations directory: %v", err)
 	}
-	
+
 	// 写入模板文件
 	if err := os.WriteFile(filename, []byte(template), 0644); err != nil {
 		log.Fatalf("Failed to create migration template: %v", err)
 	}
-	
+
 	fmt.Printf("Created migration template: %s\n", filename)
 	fmt.Println("Please:")
 	fmt.Println("1. Edit the migration file to add your SQL")
@@ -227,4 +227,4 @@ func getCurrentTimestamp() int64 {
 
 func getCurrentMicroseconds() int {
 	return 1 // 当天的迁移计数，可以根据需要调整
-}
+}