fix(web): 修复 .soon/模板加载、旧文件兼容与另存为离开提示

- 删除 design1 ui 遗留代码，修复加载竞态与新建不弹保存提示
- cloud-files 归一化旧版 .soon，IndexedDB 写入完成后再跳转设计页
- 模板/本地 .soon 首次保存须另存为，离开前统一确认
- 发版缓存 bust（version.js、soon-cache.js）及宝塔 Nginx 配置文档

Co-authored-by: Cursor <cursoragent@cursor.com>

frontend-web/js/design2/ui.js

@@ -1278,22 +1278,6 @@ function getAbsoluteXY(_obj) {
     return [_obj.get('left'), _obj.get('top')]
 }
 $('#open').click(function () {
-    if (step.val == 0) {
-        OpenDialog();
-        return;
-    }
-    layer.confirm(
-        language_str('whetherSave'),
-        function (index) {
-            if (typeof window.output === 'function') {
-                window.output(OpenDialog);
-            }
-            layer.close(index);
-        },
-        function (index) {
-            OpenDialog();
-        }
-    )
     function OpenDialog() {
         var dialogApi = (typeof dialog !== 'undefined' && dialog) ? dialog : (window.platformBridge && window.platformBridge.showOpenDialog ? { showOpenDialog: function(opts) { return window.platformBridge.showOpenDialog(opts); } } : null);
         if (!dialogApi) return;
@@ -1333,12 +1317,21 @@ $('#open').click(function () {
             })
             .catch(function(err) {});
     }
+    if (typeof window.soonConfirmLeaveThen === 'function') {
+        window.soonConfirmLeaveThen(OpenDialog);
+    } else {
+        OpenDialog();
+    }
 })
 function goFirstPage() {
     if (window.platformBridge && window.platformBridge.openFirstPage) window.platformBridge.openFirstPage();
     else if (ipcRenderer && ipcRenderer.send) ipcRenderer.send('open-first-page');
 }
 $('#new').click(function () {
+    if (typeof window.soonConfirmLeaveThen === 'function') {
+        window.soonConfirmLeaveThen(goFirstPage);
+        return;
+    }
     if (step.val == 0) {
         goFirstPage();
         return;