feat: batch download

embed.go

@@ -17,6 +17,12 @@ var appCSS []byte
 //go:embed static/app.js
 var appJS []byte
 
+//go:embed static/helpers.js
+var helpersJS []byte
+
+//go:embed static/batch.js
+var batchJS []byte
+
 // pageHTML is the assembled single-file deployment response.
 // Computed once at startup; same bytes served on every GET /.
 var pageHTML []byte
@@ -24,6 +30,9 @@ var pageHTML []byte
 func init() {
 	s := string(indexTpl)
 	s = strings.Replace(s, "/*EMBED_CSS*/", string(appCSS), 1)
-	s = strings.Replace(s, "/*EMBED_JS*/", string(appJS), 1)
+	// JS 顺序敏感: app 先声明 consts / 注册 handlers; helpers 后注入纯函数;
+	// batch 最后使用 consts 并启动 boot. 同 <script> 内共享顶层 var.
+	combined := string(appJS) + "\n" + string(helpersJS) + "\n" + string(batchJS)
+	s = strings.Replace(s, "/*EMBED_JS*/", combined, 1)
 	pageHTML = []byte(s)
 }