修复订阅授权返回后生成中断

生成动作先进入拼图进度页并立即发起生成

订阅授权改为非阻塞尝试，避免闪回卡住提交

移除订阅结果回写 web-view URL 导致回首页的逻辑

更新小程序订阅消息授权与发送边界文档

src/services/wechatMiniProgramSubscribe.ts

@@ -2,7 +2,7 @@ import { isWechatMiniProgramRuntime } from './payment/paymentPlatform';
 
 const WECHAT_JS_SDK_URL = 'https://res.wx.qq.com/open/js/jweixin-1.6.0.js';
 const SUBSCRIBE_RESULT_HASH_KEY = 'wx_subscribe_result';
-const SUBSCRIBE_RESULT_TIMEOUT_MS = 30_000;
+const SUBSCRIBE_RESULT_TIMEOUT_MS = 2_500;
 const SUBSCRIBE_RESULT_RETURN_FALLBACK_MS = 800;
 
 function clearSubscribeResultHash() {
@@ -155,9 +155,10 @@ export async function requestGenerationResultSubscribePermission() {
   }
 
   const requestId = `subscribe_generation_result_${Date.now()}`;
+  const resultPromise = waitSubscribeResultFromHash();
   const navigated = await new Promise<boolean>((resolve) => {
     miniProgram.navigateTo?.({
-      url: `/pages/subscribe-message/index?requestId=${encodeURIComponent(requestId)}&scene=generation-result&autoRequest=1`,
+      url: `/pages/subscribe-message/index?requestId=${encodeURIComponent(requestId)}&scene=generation-result`,
       success() {
         resolve(true);
       },
@@ -169,7 +170,6 @@ export async function requestGenerationResultSubscribePermission() {
   if (!navigated) {
     return false;
   }
-  const resultPromise = waitSubscribeResultFromHash();
   const result = await resultPromise;
   return Boolean(result);
 }