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/components/platform-entry/PlatformEntryFlowShellImpl.tsx

@@ -6748,7 +6748,6 @@ export function PlatformEntryFlowShellImpl({
       if (payload.action !== 'compile_puzzle_draft') {
         return;
       }
-      await requestGenerationResultSubscribePermission();
       markDraftGenerating('puzzle', [
         session.sessionId,
         buildPuzzleResultWorkId(session.sessionId),
@@ -6779,6 +6778,7 @@ export function PlatformEntryFlowShellImpl({
           error: null,
         },
       }));
+      void requestGenerationResultSubscribePermission();
     },
     onActionError: async ({ payload, errorMessage, session, setSession }) => {
       if (payload.action !== 'compile_puzzle_draft') {
@@ -7981,7 +7981,7 @@ export function PlatformEntryFlowShellImpl({
 
       try {
         const actionPayload = buildPuzzleCompileActionFromFormPayload(payload);
-        await requestGenerationResultSubscribePermission();
+        void requestGenerationResultSubscribePermission();
         const response = await executePuzzleAgentAction(
           nextSession.sessionId,
           actionPayload,