fix(admin): 模板ID匹配改由后端裁决并 trim，修复"ID明明一致却报不属于该小程序"的误报

- 拉取模板列表接口在后端统一 trim 后比对，返回 mismatched 结论（含两侧空白差异场景）
- 后台改为直接展示后端结论，避免前端字符串比对误报
- 回归 87 套件/637 用例全绿

server/tests/subscription-message-diagnose.spec.ts

@@ -44,6 +44,12 @@ describe('第七十批订阅消息原因可见与真实授权', () => {
     expect(indexCode).toContain('appIdMasked');
   });
 
+  it('模板ID匹配以后端为准并做 trim，避免误报不匹配', () => {
+    expect(indexCode).toContain('const mismatched = Object.entries(configured)');
+    expect(indexCode).toContain('const clean = (v: any) => String(v == null');
+    expect(adminCode).toContain('t.mismatched');
+  });
+
   it('小程序真正调用订阅授权并过滤占位符', () => {
     expect(subscribeCode).toContain('requestSubscribeAll');
     expect(subscribeCode).toContain("startsWith('tmpl_')");