Add checkup review flags, duplicate detection, and corrected painting images.

Introduce checkup_checked/checkup_fixed on paintings with Checkup page filters and API. Fixed paintings auto-mark as reviewed. Add find-duplicates tooling and document debug/checkup workflow. Include Botticelli and Michelangelo image fixes from checkup.

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

server/index.js

@@ -279,7 +279,9 @@ app.get('/api/artists/:id', async (req, res) => {
 app.get('/api/paintings/checkup', async (_req, res) => {
   try {
     const { rows } = await pool.query(
-      `SELECT p.id, p.title, p.year, p.image_path, p.thumbnail_path, a.name AS artist_name
+      `SELECT p.id, p.title, p.year, p.image_path, p.thumbnail_path,
+              p.checkup_checked AS checked, p.checkup_fixed AS fixed,
+              a.name AS artist_name
        FROM paintings p
        JOIN artists a ON a.id = p.artist_id
        ORDER BY a.name, p.year NULLS LAST, p.title`
@@ -309,6 +311,8 @@ app.get('/api/paintings/checkup', async (_req, res) => {
         detail_on_demand: detailOnDemand,
         gallery_file_exists: galleryFileExists,
         detail_file_exists: detailOnDemand ? null : detailFileExists,
+        checked: !!row.checked,
+        fixed: !!row.fixed,
       };
     });
 
@@ -319,6 +323,66 @@ app.get('/api/paintings/checkup', async (_req, res) => {
   }
 });
 
+// Update checkup workflow flags (checked / fixed)
+app.patch('/api/paintings/:id/checkup-flags', async (req, res) => {
+  try {
+    const paintingId = parseInt(req.params.id, 10);
+    const { checked, fixed } = req.body ?? {};
+
+    if (checked === undefined && fixed === undefined) {
+      return res.status(400).json({ error: 'Provide checked and/or fixed boolean' });
+    }
+    if (checked !== undefined && typeof checked !== 'boolean') {
+      return res.status(400).json({ error: 'checked must be a boolean' });
+    }
+    if (fixed !== undefined && typeof fixed !== 'boolean') {
+      return res.status(400).json({ error: 'fixed must be a boolean' });
+    }
+
+    const current = await pool.query(
+      `SELECT checkup_checked, checkup_fixed FROM paintings WHERE id = $1`,
+      [paintingId]
+    );
+    if (current.rows.length === 0) {
+      return res.status(404).json({ error: 'Painting not found' });
+    }
+
+    const willBeFixed =
+      fixed !== undefined ? fixed : !!current.rows[0].checkup_fixed;
+    let nextChecked = checked;
+    if (willBeFixed) {
+      nextChecked = true;
+    }
+
+    const sets = [];
+    const params = [];
+    if (fixed !== undefined) {
+      params.push(fixed);
+      sets.push(`checkup_fixed = $${params.length}`);
+    }
+    if (nextChecked !== undefined) {
+      params.push(nextChecked);
+      sets.push(`checkup_checked = $${params.length}`);
+    }
+    params.push(paintingId);
+
+    const result = await pool.query(
+      `UPDATE paintings SET ${sets.join(', ')}
+       WHERE id = $${params.length}
+       RETURNING checkup_checked AS checked, checkup_fixed AS fixed`,
+      params
+    );
+
+    res.json({
+      checked: !!result.rows[0].checked,
+      fixed: !!result.rows[0].fixed,
+    });
+  } catch (err) {
+    console.error('Checkup flags error:', err.message);
+    res.status(500).json({ error: 'Failed to update checkup flags' });
+  }
+});
+
 // Painting detail with influences
 app.get('/api/paintings/:id', async (req, res) => {
   try {
@@ -419,7 +483,11 @@ app.post('/api/paintings/:id/fix-image', async (req, res) => {
     }
 
     const updated = await replacePaintingImageFromUrl(paintingId, imageUrl);
-    res.json(updated);
+    await pool.query(
+      `UPDATE paintings SET checkup_fixed = true, checkup_checked = true WHERE id = $1`,
+      [paintingId]
+    );
+    res.json({ ...updated, fixed: true, checked: true });
   } catch (err) {
     console.error('Fix image error:', err.message);
     res.status(500).json({ error: err.message || 'Fix image failed' });