Fix GIPHY UI cache mismatch

TODO.md

@@ -268,6 +268,19 @@
   - backend debug broadcasts
 
 ## Recent Change Log
+- Date: `2026-03-24`
+- What changed:
+  - Removed the large GIPHY image-mode info box entirely and replaced it with a minimal inline prompt bar plus `Powered by GIPHY` label.
+  - Hardened frontend visibility toggling so stale cached HTML/JS combinations do not crash on missing elements.
+  - Bumped the frontend asset version again so browsers are forced onto the latest image-search UI bundle after the GIPHY panel changes.
+- Why it changed:
+  - Real user logs showed a client-side `Cannot read properties of null (reading 'classList')` error caused by stale frontend asset mismatch, which prevented image results from rendering, and the remaining large image-mode box was still not desired in the UI.
+- How it was verified:
+  - log review of `ai-media-hub-2026-03-24T07-48-19-085Z.log`
+  - `node --check frontend/app.js`
+- What is still risky or incomplete:
+  - Users with aggressively cached browser sessions may still need one hard refresh to fully drop older HTML/JS combinations already loaded in an open tab.
+
 - Date: `2026-03-24`
 - What changed:
   - Simplified the GIPHY image-search UX so it presents raw search results instead of looking like an AI-evaluated result flow.