Initial commit: Complete NodeJS-native setup

- Migrated from Python pre-commit to NodeJS-native solution
- Reorganized documentation structure
- Set up Husky + lint-staged for efficient pre-commit hooks
- Fixed Dockerfile healthcheck issue
- Added comprehensive documentation index

components/ui/index.ts

@@ -0,0 +1,4 @@
+// UI Components
+export { default as BarChart } from './BarChart';
+export { default as ReminderCard } from './ReminderCard';
+export { default as ThemeSwitcher } from './ThemeSwitcher';