Web 端数据交互与 design2 布局修复

统一门户 JSON 契约：新增 GET /templates/{id}，模板/云文件/保存/打开走虚拟 key；
layer 保存弹层替代 prompt，本地 .soon 已登录后台 POST 登记；修复保存静默失败与 design2 全宽布局。

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

frontend-web/js/design2/output.js

@@ -333,6 +333,7 @@ window.display_func = function display_func(img1, img2, img3) {
 
     layer.open({
         type: 1,
+        skin: 'soon-layer',
         area: [w, h],
         title: language_str('display'), //不显示标题栏"预览"
         shadeClose: true, //点击遮罩关闭
@@ -1087,6 +1088,9 @@ function cloudSaveSuccessLabel(res, fallback) {
 
 function onCloudWriteDone(res, fallback, callback) {
   applyCloudWriteResult(res, fallback);
+  if (res && res.fileKey && typeof window.soonClearPendingImport === 'function') {
+    window.soonClearPendingImport();
+  }
   layer.msg(language_str('saveSucc') + cloudSaveSuccessLabel(res, fallback));
   if (callback && typeof callback === 'function') callback();
 }
@@ -1095,6 +1099,15 @@ function guardWebSave() {
   return typeof window.soonGuardCloudSave === 'function' ? window.soonGuardCloudSave() : true;
 }
 
+function reportSaveError(err) {
+  if (err && err.status) return;
+  if (typeof window.soonShowApiError === 'function') {
+    window.soonShowApiError({ status: err && err.status, message: (err && err.message) || '保存失败' });
+  } else if (typeof window.soonToast === 'function') {
+    window.soonToast('保存失败', 'error');
+  }
+}
+
 function saveAs(op1, callback) {
     // 临时移除辅助线，保存后再恢复
     let guideLines1 = []
@@ -1143,7 +1156,7 @@ function saveAs(op1, callback) {
             if (window.platformBridge && window.platformBridge.writeFile) {
                 window.platformBridge.writeFile(fp, content).then(function (res) {
                     onCloudWriteDone(res, fp, callback);
-                }).catch(function () {});
+                }).catch(reportSaveError);
                 return;
             }
             var fs = typeof require !== 'undefined' ? require('fs') : null;
@@ -1155,7 +1168,7 @@ function saveAs(op1, callback) {
                 if (callback && typeof callback === 'function') callback();
             }
         })
-        .catch(function(err) {});
+        .catch(reportSaveError);
 }
 
 function save(op1, callback) {
@@ -1198,7 +1211,7 @@ function save(op1, callback) {
         if (window.platformBridge && window.platformBridge.writeFile) {
             window.platformBridge.writeFile(openAs.name, content).then(function (res) {
                 onCloudWriteDone(res, openAs.name, callback);
-            }).catch(function () {});
+            }).catch(reportSaveError);
             return;
         }
         var fs = typeof require !== 'undefined' ? require('fs') : null;
@@ -1222,7 +1235,7 @@ function save(op1, callback) {
             if (window.platformBridge && window.platformBridge.writeFile) {
                 window.platformBridge.writeFile(fp, content).then(function (res) {
                     onCloudWriteDone(res, fp, callback);
-                }).catch(function () {});
+                }).catch(reportSaveError);
                 return;
             }
             var fs = typeof require !== 'undefined' ? require('fs') : null;
@@ -1234,7 +1247,7 @@ function save(op1, callback) {
                 if (callback && typeof callback === 'function') callback();
             }
         })
-        .catch(function(err) {});
+        .catch(reportSaveError);
 }
 
 window.saveHistory = function saveHistory() {
@@ -1287,7 +1300,10 @@ window.openFile = function open(file, jAlready) {
     if (!file) return;
     if (typeof window.soonBindFileMeta === 'function') window.soonBindFileMeta(file);
     function doOpenWithJson(j) {
-        if (!j || !background_image) return;
+        if (!j || !background_image) {
+            if (typeof window.soonReportOpenLoadError === 'function') window.soonReportOpenLoadError('模板/文件加载失败');
+            return;
+        }
         openAs.name = file;
         var left = background_image.left
     let top = background_image.top
@@ -1438,6 +1454,7 @@ window.openFile = function open(file, jAlready) {
             recordJson = recordJson2
             step = step2
         }
+        if (typeof window.soonTryConsumeCloudImport === 'function') window.soonTryConsumeCloudImport(file);
     }
 
     canvas1.loadFromJSON(j.f, function () {
@@ -1482,7 +1499,11 @@ window.openFile = function open(file, jAlready) {
             if (j) {
                 doOpenWithJson(j);
                 openAs.name = file;
+            } else if (typeof window.soonReportOpenLoadError === 'function') {
+                window.soonReportOpenLoadError('模板/文件加载失败');
             }
+        }).catch(function () {
+            if (typeof window.soonReportOpenLoadError === 'function') window.soonReportOpenLoadError('模板/文件加载失败');
         });
     }
     try {