feat: 同步管理端、用户端与后端业务，并接通线上 Web 接口

补齐平台订阅、外部登录、CRM 同步与用户端页面；Nginx 转发用户端接口，登录页使用 Google 与 Apple 标志。

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

backend/test/modules/crm/workplace.test.ts

@@ -117,7 +117,7 @@ describe('商务概览工作台聚合 (getWorkplaceOverview)', () => {
       find: jest.fn().mockResolvedValue(leads),
     } as never;
 
-    const result = await service.getWorkplaceOverview({ feedLimit: 8 });
+    const result = await service.getWorkplaceOverview({ feedLimit: 8, now: today });
     expect(result.kpis.tapCount).toBe(1);
     expect(result.kpis.newLeadCount).toBe(1);
     expect(result.radarFeed[0].viewedBlocks).toEqual(['hero', 'cases']);