feat: introduced a token-based theming system across the UI

* feat: added themes system

* feat: smart sidebar auto-hide for files/diff tabs + lower files sidebar threshold

* feat: added Checkbox component and update theming

- Add reusable Checkbox component for toggles across UI
- Replace several inputs with Checkbox in settings and commands panels
- Add DiffIcon and apply surface/border theming to key UI areas

* feat: Add convert-vscode-theme.cjs to convert VS Code themes to OpenChamber format

* refactor: remove unused permission logic from ChatInput

- Remove unused permission rules parsing logic from ChatInput
- Memoize renderTheme in DiffWorkerProvider to avoid unnecessary recalculations
- Remove forceOpaque helper in vscode theme adapter

* fix: guard VSCode theme loading in MarkdownRenderer

* feat: add custom user themes loading and reload

- Load user themes from ~/.config/openchamber/themes at runtime
- Expose /api/config/themes to fetch custom themes
- Allow theme reloading from Settings → Theme → Reload themes in the UI

packages/ui/src/components/chat/StatusChip.tsx

@@ -41,7 +41,7 @@ export const StatusChip: React.FC<StatusChipProps> = ({ onClick, className }) =>
                 'inline-flex min-w-0 items-center justify-center',
                 'rounded-lg border border-border/50 px-1.5',
                 'typography-meta font-medium text-foreground/80',
-                'focus:outline-none',
+                'focus:outline-none hover:bg-[var(--interactive-hover)]',
                 className
             )}
             style={{