- Cost tracker: fix event type message -> message_end, handle usage.input fallback
- Model badge: update immediately on model select via onModelSelect hook
- Empty state: hide completely when hasMessages (not after LLM responds)
- Provider tabs: add renderProviderTabs() to ModelSelector content + filtering
- Memory tools: register memory_save/recall in tool index, export from web-ui, add to createTools
- Session save: save before newSession, relax shouldSaveSession to user-only, title fallback
- Dark mode: add text-foreground to memory-manager dialog + inputs
- View toggles: add tool-message and thinking-block element CSS selectors
- Empty state faded: return empty html instead of ghost mascot
- Add 5 mascot images (default, fire, point-up, point-self, camo) to public/mascot/
- New empty state component with floating mascot, tagline, and suggestion chips
- New utility toggle component (show/hide tool calls, thinking, system msgs, timestamps)
- Mascot logo in header with wobble animation on hover
- Floating animation and orange glow for mascot in empty state
- Suggestion chips dispatch events to fill chat textarea
- CSS visibility classes for all toggle states
