fix(chat): declare X dark artwork in the app catalog

Co-Authored-By: Paperclip <noreply@paperclip.ing>

packages/shared/src/app-definitions/x.json

@@ -8,7 +8,8 @@
   ],
   "featured": false,
   "branding": {
-    "logoUrl": "/brands/apps/x.svg"
+    "logoUrl": "/brands/apps/x.svg",
+    "darkLogoUrl": "/brands/apps/x-dark.svg"
   },
   "urlPatterns": [
     "https://x.com/*"

scripts/ingest-app-definitions.mjs

@@ -1627,7 +1627,8 @@ apps.push({
   ],
   "featured": false,
   "branding": {
-    "logoUrl": "/brands/apps/x.svg"
+    "logoUrl": "/brands/apps/x.svg",
+    "darkLogoUrl": "/brands/apps/x-dark.svg"
   },
   "urlPatterns": [
     "https://x.com/*"