fix(web): Remove stale merge-batch e2e assets

The previous cleanup removed the synthetic test skill but left stale
web assets that still referenced it, which broke validate:references
on main CI.

Refresh the tracked web outputs so the removed fixture disappears from
the sitemap and skills backup.

apps/web-app/public/sitemap.xml

@@ -6,12 +6,6 @@
     <changefreq>daily</changefreq>
     <priority>1.0</priority>
   </url>
-  <url>
-    <loc>http://localhost/skill/merge-batch-e2e-test</loc>
-    <lastmod>2026-04-05</lastmod>
-    <changefreq>weekly</changefreq>
-    <priority>0.7</priority>
-  </url>
   <url>
     <loc>http://localhost/skill/awareness-stage-mapper</loc>
     <lastmod>2026-04-05</lastmod>
@@ -246,4 +240,10 @@
     <changefreq>weekly</changefreq>
     <priority>0.7</priority>
   </url>
+  <url>
+    <loc>http://localhost/skill/app-store-changelog</loc>
+    <lastmod>2026-04-05</lastmod>
+    <changefreq>weekly</changefreq>
+    <priority>0.7</priority>
+  </url>
 </urlset>

apps/web-app/public/skills.json.backup

@@ -18035,28 +18035,6 @@
       "reasons": []
     }
   },
-  {
-    "id": "merge-batch-e2e-test",
-    "path": "skills/merge-batch-e2e-test",
-    "category": "testing",
-    "name": "merge-batch-e2e-test",
-    "description": "Synthetic skill used to exercise the maintainer merge workflow end-to-end.",
-    "risk": "safe",
-    "source": "community",
-    "date_added": "2026-04-05",
-    "plugin": {
-      "targets": {
-        "codex": "supported",
-        "claude": "supported"
-      },
-      "setup": {
-        "type": "none",
-        "summary": "",
-        "docs": null
-      },
-      "reasons": []
-    }
-  },
   {
     "id": "mermaid-expert",
     "path": "skills/mermaid-expert",