永久会员与模板库后台化：预览门控、轻量首页与 Admin CRUD

- 会员改为永久激活方案；云端文件不再拦截非会员；预览弹窗内导出/打印才校验
- 首页最近文件支持本地记录，登录后与云端合并；移除独立会员页与订阅页
- 模板库入库管理：soon_templates 表、Admin 上传 CRUD、/templates 轻量列表与按需下载

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

frontend-web/js/design1/ui.js

@@ -1355,7 +1355,6 @@ $("#open").click(function () {
         OpenDialog();
     });
     function OpenDialog() {
-        if (typeof window.soonRequireLogin === 'function' && !window.soonRequireLogin('打开文件')) return;
         var dialogApi = (typeof dialog !== 'undefined' && dialog) ? dialog : (window.platformBridge && window.platformBridge.showOpenDialog ? { showOpenDialog: function(opts) { return window.platformBridge.showOpenDialog(opts); } } : null);
         if (!dialogApi) return;
         dialogApi.showOpenDialog({
@@ -1376,6 +1375,14 @@ $("#open").click(function () {
                 }
             }
             function importAndOpen(j, fileName) {
+                var tok = typeof window.soonGetAccessToken === 'function'
+                    ? window.soonGetAccessToken()
+                    : (localStorage.getItem('soon_access') || '');
+                if (!tok && typeof window.soonPutSoonSession === 'function') {
+                    var localKey = window.soonPutSoonSession(j, fileName || 'design.soon');
+                    if (localKey) openWithKey(localKey, j);
+                    return;
+                }
                 if (!window.platformBridge || !window.platformBridge.importSoonFile) return;
                 window.platformBridge.importSoonFile(fileName || 'design.soon', j).then(function(res) {
                     if (res && res.fileKey) openWithKey(res.fileKey, j);
@@ -2365,7 +2372,6 @@ $("#help").click(function() {
 
 // ===========================================================
 $('#display').on('click', function () {
-    if (typeof window.soonGuardMemberPreview === 'function' && !window.soonGuardMemberPreview()) return;
     // 类型改变
     fabric.Image.fromURL(soonAsset('front_bg') + bg_version + '_1.png', function (i1) {
         i1.left = background_image.left;