- Add image block type for base64 and URL images
- Parse image/image_url blocks from gateway history
- Render images inline in chat messages (rounded, dark-themed)
- Click-to-zoom lightbox with Escape to close
- Markdown images also use the lightbox component
- Detect base64 images in tool results (e.g. Read tool on image files)
- Support png, jpg, gif, webp formats
- Lightweight i18n system in src/lib/i18n.ts (no external deps)
- All UI strings extracted to translation keys
- English (default) and French locales included
- Set VITE_LOCALE=fr in .env for French UI
- Fallback to English for unknown locales
- Replace all French UI strings with English (Connected, Thinking, Result, Send, etc.)
- Add role="log" + aria-live="polite" to chat message area
- Add role="form" + aria-label to message input area
- Add aria-label to sidebar toggle, attach file, send, and textarea
- Add role="banner" to header, role="navigation" to sidebar
- Add role="application" to app root
