fix(subscribe): 修复小程序授权"未获得提醒授权"——避免授权弹窗与公告弹窗重叠

- openNotice 改为串行：先请求订阅授权，等授权弹窗关闭后再展示平台公告（此前两原生弹窗重叠会取消授权，回调全 reject）
- 授权结果区分展示：成功显示已开启项数；未同意提示可在微信设置中重新允许；接口报错显示 errCode
- requestSubscribeAll 单次最多取前3个模板(微信限制)，并返回 resultMap 便于排查
- 回归 87 套件/639 用例全绿

pwuniapp/common/subscribe.js

@@ -73,14 +73,16 @@ export function requestSubscribeAll() {
       if (tmplIds.length === 0) {
         return resolve({ supported: true, tmplIds: [], accepted: [], rejected: [], noTemplates: true });
       }
+      // 微信单次最多 3 个模板
+      const batch = tmplIds.slice(0, 3);
       uni.requestSubscribeMessage({
-        tmplIds,
+        tmplIds: batch,
         success: (res) => {
-          const accepted = tmplIds.filter((id) => res && res[id] === 'accept');
-          const rejected = tmplIds.filter((id) => !res || res[id] !== 'accept');
-          resolve({ supported: true, tmplIds, accepted, rejected, raw: res });
+          const accepted = batch.filter((id) => res && res[id] === 'accept');
+          const rejected = batch.filter((id) => !res || res[id] !== 'accept');
+          resolve({ supported: true, tmplIds: batch, accepted, rejected, resultMap: res });
         },
-        fail: (err) => resolve({ supported: true, tmplIds, accepted: [], rejected: tmplIds, error: err }),
+        fail: (err) => resolve({ supported: true, tmplIds: batch, accepted: [], rejected: batch, error: err }),
         complete: () => {}
       });
     } catch (e) {