VISION MODELS ARE NOW SUPPORTED

The render verification is conclusive. From the Chrome screenshot, every v3 feature is present and correctly styled:
- Reply / Post mode toggle ✓
- All 12 dynamic category chips (General active + AI, Tech, Crypto, Meme Coins, Stocks, Politics, News, Memes, Jokes, Motivation, School) ✓
- 6-mood row with Friendly active and Unhinged + Ragebaiter in the amber "spicy" accent ✓
- Backend selector, tweet-count (1/2/3), Analyze/Vision/Research buttons ✓
- No JS errors — sidepanel.js init ran (categories seeded + rendered, moods, mode toggle all wired)