修复拼图生成前订阅授权

新增小程序原生订阅消息授权页，在用户点击后请求生成结果通知授权。

拼图 compile_puzzle_draft 前等待授权页返回或跳过后再发起生成 action。

移除 web-view message 订阅授权路径，改用 storage/hash 回写订阅结果。

补充订阅授权测试、文档和团队踩坑记录。

miniprogram/pages/subscribe-message/index.test.js

@@ -0,0 +1,99 @@
+import { beforeEach, describe, expect, test, vi } from 'vitest';
+
+import subscribeMessageBridge from './index.shared.js';
+
+const TEST_TEMPLATE_ID = 'm5z7BkkBhJGbcH0cdDeHaeRU2tViDEguP38XdrRRCdU';
+
+const {
+  SUBSCRIBE_RESULT_STORAGE_KEY,
+  appendSubscribeResult,
+  buildSubscribeResultValue,
+  createSubscribeMessagePage,
+} = subscribeMessageBridge;
+
+describe('subscribe-message mini program bridge', () => {
+  beforeEach(() => {
+    globalThis.wx = {
+      requestSubscribeMessage: vi.fn(),
+      setStorageSync: vi.fn(),
+      navigateBack: vi.fn(),
+    };
+    globalThis.getCurrentPages = vi.fn(() => []);
+  });
+
+  test('requests subscribe message and notifies previous web-view before returning', () => {
+    const previousPage = {
+      data: { webViewUrl: 'https://web.test/#tab=create' },
+      setData: vi.fn(),
+    };
+    globalThis.getCurrentPages = vi.fn(() => [previousPage, {}]);
+    globalThis.wx.requestSubscribeMessage.mockImplementationOnce((options) => {
+      options.success?.({
+        m5z7BkkBhJGbcH0cdDeHaeRU2tViDEguP38XdrRRCdU: 'accept',
+      });
+    });
+    const page = createSubscribeMessagePage(
+      {
+        setData: vi.fn(),
+      },
+      { templateId: TEST_TEMPLATE_ID },
+    );
+    page.onLoad({ requestId: 'request-1' });
+
+    page.requestSubscribe();
+
+    expect(globalThis.wx.requestSubscribeMessage).toHaveBeenCalledWith({
+      tmplIds: [TEST_TEMPLATE_ID],
+      success: expect.any(Function),
+      fail: expect.any(Function),
+    });
+    expect(globalThis.wx.setStorageSync).toHaveBeenCalledWith(
+      SUBSCRIBE_RESULT_STORAGE_KEY,
+      'request-1:success',
+    );
+    expect(previousPage.setData).toHaveBeenCalledWith({
+      webViewUrl:
+        'https://web.test/#tab=create&wx_subscribe_result=request-1%3Asuccess',
+    });
+    expect(globalThis.wx.navigateBack).toHaveBeenCalled();
+  });
+
+  test('skip action notifies previous web-view', () => {
+    const previousPage = {
+      data: { webViewUrl: 'https://web.test/' },
+      setData: vi.fn(),
+    };
+    globalThis.getCurrentPages = vi.fn(() => [previousPage, {}]);
+    const page = createSubscribeMessagePage(
+      {
+        setData: vi.fn(),
+      },
+      { templateId: TEST_TEMPLATE_ID },
+    );
+    page.onLoad({ requestId: 'request-skip' });
+
+    page.handleSkip();
+
+    expect(globalThis.wx.setStorageSync).toHaveBeenCalledWith(
+      SUBSCRIBE_RESULT_STORAGE_KEY,
+      'request-skip:skip:user_skip',
+    );
+    expect(previousPage.setData).toHaveBeenCalledWith({
+      webViewUrl:
+        'https://web.test/#wx_subscribe_result=request-skip%3Askip%3Auser_skip',
+    });
+    expect(globalThis.wx.navigateBack).toHaveBeenCalled();
+  });
+
+  test('appendSubscribeResult replaces stale subscribe hash', () => {
+    expect(
+      appendSubscribeResult(
+        'https://web.test/#old=1&wx_subscribe_result=old',
+        'req:skip',
+      ),
+    ).toBe('https://web.test/#old=1&wx_subscribe_result=req%3Askip');
+    expect(buildSubscribeResultValue('req-1', 'skip', 'user_cancel')).toBe(
+      'req-1:skip:user_cancel',
+    );
+  });
+});