- Update `wrangler.jsonc` to correct the `CUSTOM_AGENT_WEBHOOK` URL.
- Enhance `page.tsx` to load custom agents from localStorage and merge them with predefined agents.
- Modify `route.ts` to validate `systemPrompt` for custom agents and include it in the webhook payload.
- Adjust `chat-interface.tsx` to handle custom agents more effectively, including system prompt integration and event dispatching for pinned agents.
- Remove obsolete `CUSTOM_AGENT_EXECUTION_PRD.md` and `DIFF_TOOL_USAGE.md` files as part of cleanup.
- Move new chat button to left side, bookmark button stays on right
- Add max-width constraint (75%) to user messages with proper text wrapping
- Remove right-align text from user message frames (keep bubbles on right)
- Add overflow handling for code blocks in messages
- Change scrollbar color from orange to gray in light and dark modes
- Fix pill loading animation flicker by initializing pinnedAgents from localStorage
- Add 0.2s base delay to pill animations for staggered reveal
- Improve Create new button animation: longer duration (0.6s), bouncy scale sequence, easeInOut easing
