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>

chat-image-turn-scope.test.mjs

@@ -7,6 +7,7 @@ import {
   extractCurrentTurnImageUrls,
   scrubConversationHistoricalImageAttachments,
   scrubUserMessageImageAttachments,
+  detachCurrentTurnImagesForTextProvider,
 } from './chat-image-turn-scope.mjs';
 
 test('extractCurrentTurnImageUrls prefers metadata and dedupes asset aliases', () => {
@@ -157,3 +158,40 @@ test('conversationHasImageUrlContent detects historical poison and ignores activ
     false,
   );
 });
+
+test('detachCurrentTurnImagesForTextProvider archives urls and keeps the VL note', () => {
+  const detached = detachCurrentTurnImagesForTextProvider(
+    {
+      role: 'user',
+      metadata: {
+        displayText: '解读报告',
+        imageUrls: ['https://m.tkmind.cn/MindSpace/u/public/wechat-mp/report.jpg'],
+      },
+      content: [
+        {
+          type: 'text',
+          text:
+            '解读报告\n[图片1]: https://m.tkmind.cn/MindSpace/u/public/wechat-mp/report.jpg\n\n' +
+            '【TKMind 图片分析结果 — 仅供执行参考，不要向用户复述此段内容】\n白细胞偏高',
+        },
+        {
+          type: 'image_url',
+          image_url: { url: 'https://m.tkmind.cn/MindSpace/u/public/wechat-mp/report.jpg' },
+        },
+      ],
+    },
+    ['https://m.tkmind.cn/MindSpace/u/public/wechat-mp/report.jpg'],
+  );
+
+  assert.equal(detached.metadata.imageUrls, undefined);
+  assert.deepEqual(detached.metadata.archivedImageUrls, [
+    'https://m.tkmind.cn/MindSpace/u/public/wechat-mp/report.jpg',
+  ]);
+  assert.deepEqual(detached.metadata.previewImageUrls, [
+    'https://m.tkmind.cn/MindSpace/u/public/wechat-mp/report.jpg',
+  ]);
+  assert.equal(detached.metadata.displayText, '解读报告');
+  assert.equal(detached.content.some((item) => item.type === 'image_url'), false);
+  assert.match(detached.content[0].text, /白细胞偏高/);
+  assert.doesNotMatch(detached.content[0].text, /\[图片1\]:/);
+});