fix(wechat): rotate image_url-poisoned sessions for report follow-ups

Goose cannot persist historical image scrub (PUT 405), so DeepSeek rejects
image_url on the next turn. Reattach the recent report image and rotate to a
fresh session instead of treating the follow-up as a missing page source.

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

wechat-mp.mjs

@@ -1088,6 +1088,12 @@ export function isWechatPageDataTask(text) {
   return isPageDataIntent(text) || isPageDataDevIntent(text);
 }
 
+export function isWechatHistoricalImageSessionError(message) {
+  return /historical_image_session_update_unsupported|unknown variant [`']?image_url/i.test(
+    String(message ?? '').trim(),
+  );
+}
+
 export function isRecoverableWechatAgentSessionError(message) {
   const normalized = String(message ?? '').trim();
   if (!normalized) return false;
@@ -1095,9 +1101,7 @@ export function isRecoverableWechatAgentSessionError(message) {
   if (/wechat_page_fresh_thumbnail_required:/i.test(normalized)) return true;
   if (/403|404|not found|无权访问/i.test(normalized)) return true;
   if (/tool_calls|tool_call_id|insufficient tool messages/i.test(normalized)) return true;
-  if (/historical_image_session_update_unsupported|unknown variant [`']?image_url/i.test(normalized)) {
-    return true;
-  }
+  if (isWechatHistoricalImageSessionError(normalized)) return true;
   if (/session already has an active request|active request.*cancel/i.test(normalized)) return true;
   if (/wechat_agent_incomplete_reply/i.test(normalized)) return true;
   return false;
@@ -1712,7 +1716,13 @@ export function createWechatMpService({
   const attachRecentMediaForFollowup = (openid, intent, mediaAnalysisEnabled) => {
     if (!mediaAnalysisEnabled || intent?.msgType !== 'text' || intent?.media?.publicUrl) return;
     const text = String(intent?.agentText ?? '');
-    if (!/(?:刚才|之前|上一|这张|这份|图片|图像|照片|文件|文档|表格|excel|word)/iu.test(text)) return;
+    if (
+      !/(?:刚才|之前|上一|这张|这份|图片|图像|照片|文件|文档|表格|excel|word|报告|解读|化验|检验|做成页面|做个页面|做页面|生成页面)/iu.test(
+        text,
+      )
+    ) {
+      return;
+    }
     const key = String(openid ?? '').trim();
     const recent = recentMediaByOpenid.get(key);
     if (
@@ -3099,8 +3109,13 @@ export function createWechatMpService({
       const mayBeStaleSession =
         sessionId
         && (isRecoverableWechatAgentSessionError(message) || isWechatAgentApiErrorText(message));
+      const historicalImageError = isWechatHistoricalImageSessionError(message);
       if (mayBeStaleSession) {
-        if (sessionPageContinuation && isWechatPageContinuationRepairableError(message)) {
+        if (
+          sessionPageContinuation
+          && !historicalImageError
+          && isWechatPageContinuationRepairableError(message)
+        ) {
           const text = buildPagePublishFailureText();
           await userAuth.clearWechatAgentRoute(config.appId, inbound.fromUserName).catch((clearErr) => {
             logger.warn?.('WeChat MP page continuation repair route clear failed:', clearErr);
@@ -3116,7 +3131,7 @@ export function createWechatMpService({
           repairError.wechatAgentSessionId = sessionId;
           throw repairError;
         }
-        if (sessionPageContinuation) {
+        if (sessionPageContinuation && !historicalImageError) {
           await userAuth.clearWechatAgentRoute(config.appId, inbound.fromUserName).catch((clearErr) => {
             logger.warn?.('WeChat MP contextual follow-up route clear failed:', clearErr);
           });
@@ -3144,17 +3159,18 @@ export function createWechatMpService({
         await rememberWechatUserContext(sessionId, user, { forceBootstrap: route.isNewSession });
         const retryId = crypto.randomUUID();
         const retryStartedAt = Date.now();
+        const retryPageContinuation = sessionPageContinuation && !historicalImageError;
         const retryPrompt =
           wechatIntent.kind === 'page.generate'
             ? buildPageGenerateAgentPrompt(intent, {
                 wantsDocx: wechatIntent.wantsDocx,
                 imagePolicy,
-                preferImmediateContext: sessionPageContinuation,
-                carriedSessionContent,
+                preferImmediateContext: retryPageContinuation,
+                carriedSessionContent: retryPageContinuation ? carriedSessionContent : '',
               })
             : buildWechatAgentPrompt(intent, {
                 imagePolicy,
-                preferSessionPageContinuation: sessionPageContinuation,
+                preferSessionPageContinuation: retryPageContinuation,
               });
         const reply = await executeSessionReply(
           (pathname, init) => fetchForSession(sessionId, pathname, init),
@@ -3171,7 +3187,7 @@ export function createWechatMpService({
               userId: user.userId,
               sessionId,
               userMessage,
-              preserveAgentPrompt: sessionPageContinuation,
+              preserveAgentPrompt: retryPageContinuation,
             }),
             submitReply: submitSessionReply
               ? ({ requestId: replyRequestId, userMessage }) =>