Separate WeChat chat, page refine, and task flows with explicit routing.

Add channel prefixes, pin edit targets in Cursor prompts, and force fresh sessions for page refine URLs so DeepSeek/Goose chat history does not pollute page tasks.

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

wechat/prompts/page-generate.mjs

@@ -4,6 +4,7 @@ import {
   isPageDataIntent,
 } from '../../chat-skills.mjs';
 import { buildWechatPageImageInstruction } from '../image-generation-policy.mjs';
+import { buildPageRefineTargetPromptBlock } from '../page-refine-target.mjs';
 
 /**
  * Service-account-only page generation prompt. Does not use H5 buildAutoChatSkillPrefix.
@@ -52,6 +53,7 @@ export function buildPageGenerateAgentPrompt(
   const coverExample = imageBlock
     ? '<本轮 generate_image 返回的 asset.htmlSrc>'
     : 'assets/hero.jpg';
+  const pageRefineBlock = buildPageRefineTargetPromptBlock(topic);
   const pageDataBlock = pageDataTask
     ? [
         '【Page Data 强制要求】这不是静态展示页。',
@@ -72,6 +74,7 @@ export function buildPageGenerateAgentPrompt(
     imageBlock,
     immediateContextBlock,
     carriedSessionBlock,
+    pageRefineBlock,
     pageDataBlock,
     '步骤（必须全部完成）：',
     pageDataTask