* 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
- Introduced command scope types (user and project) to manage command configurations at different levels.
- Enhanced command management functions to check and create commands based on their scope.
- Updated the API to handle command creation, updates, and deletions with respect to their scope.
- Added a reload button in the AboutSettings component to refresh OpenCode configuration.
- Improved command source retrieval to prioritize project-level commands over user-level commands.
- Refactored related functions to ensure proper handling of command paths and configurations based on scope.
Bohdan Triapitsyn