Improve 3D gallery and debug checkup workflow for image curation.

Add parquet floor, museum-style exit, movement-tinted walls, and gold/black
frames with gallery sync after Fix it. Debug panel gets Checked and Fix it
buttons; documentation and image-fetch reliability updates included.

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

server/image-service.js

@@ -3,7 +3,7 @@ const path = require('path');
 const pool = require('./db');
 const {
   savePaintingImages,
-  downloadImageToFile,
+  downloadImageForFix,
   generateThumbnailFromFull,
   pickExt,
 } = require('../scripts/image-fetcher');
@@ -154,7 +154,7 @@ async function ensurePaintingImages(paintingId, size = 'thumb') {
   return promise;
 }
 
-async function replacePaintingImageFromUrl(paintingId, imageUrl) {
+async function replacePaintingImageFromUrl(paintingId, imageUrl, context = {}) {
   const result = await pool.query(
     `SELECT p.id, p.title, p.image_path, p.thumbnail_path, a.name AS artist_name
      FROM paintings p
@@ -182,7 +182,7 @@ async function replacePaintingImageFromUrl(paintingId, imageUrl) {
   unlinkIfExists(fullDest);
   unlinkIfExists(thumbDest);
 
-  await downloadImageToFile(imageUrl, fullDest, { force: true });
+  await downloadImageForFix(imageUrl, fullDest, context);
 
   let thumbnailPath = null;
   try {