SvelteKit Development

# SvelteKit Project

This is a SvelteKit project using Svelte 5 runes and file-based routing.

## Project Structure
- `src/routes/` - File-based routing (pages and API endpoints)
- `src/routes/+page.svelte` - Page components
- `src/routes/+page.server.ts` - Server-side load functions
- `src/routes/+server.ts` - API endpoints
- `src/lib/` - Shared library code (`$lib` alias)
- `src/lib/components/` - Reusable Svelte components
- `src/lib/server/` - Server-only modules
- `static/` - Static assets
- `tests/` - Playwright and Vitest tests

## Code Style
- Use Svelte 5 runes (`$state`, `$derived`, `$effect`, `$props`)
- Use TypeScript for type safety
- Keep components small and composable
- Use `+page.server.ts` for data loading, not client-side fetching
- Use form actions for mutations

## Conventions
- Use `$state()` for reactive state, `$derived()` for computed values
- Use `$props()` to declare component props
- Prefer `+server.ts` API routes over external API calls
- Use `$lib` alias for imports from lib directory
- Use SvelteKit's built-in form handling for progressive enhancement
- Colocate related files in route directories

## Commands
- `npm run dev` - Start development server
- `npm run build` - Build for production
- `npm run preview` - Preview production build
- `npm run test` - Run Vitest tests
- `npm run lint` - Run ESLint and svelte-check