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>

tkmind-proxy.mjs

@@ -35,6 +35,7 @@ import { extractAttachmentText } from './mindspace-attachment-text.mjs';
 import {
   buildCurrentTurnImageScopeNote,
   conversationHasImageUrlContent,
+  detachCurrentTurnImagesForTextProvider,
   extractCurrentTurnImageUrls,
   scrubConversationHistoricalImageAttachments,
 } from './chat-image-turn-scope.mjs';
@@ -1004,15 +1005,18 @@ export async function buildVisionPayload({
     .filter((url) => typeof url === 'string' && url.trim());
 
   return {
-    userMessage: {
-      ...userMessage,
-      content: updatedContent,
-      metadata: {
-        ...(userMessage.metadata ?? {}),
-        ...(originalDisplayText ? { displayText: originalDisplayText } : {}),
-        ...(canonicalImageUrls.length ? { imageUrls: canonicalImageUrls } : {}),
+    userMessage: detachCurrentTurnImagesForTextProvider(
+      {
+        ...userMessage,
+        content: updatedContent,
+        metadata: {
+          ...(userMessage.metadata ?? {}),
+          ...(originalDisplayText ? { displayText: originalDisplayText } : {}),
+          ...(canonicalImageUrls.length ? { imageUrls: canonicalImageUrls } : {}),
+        },
       },
-    },
+      canonicalImageUrls,
+    ),
     billableImageCount: visionDescription ? 1 : 0,
   };
 }