- Show "DEVELOPMENT MODE" in footer instead of timestamp
- Disable offline install/uninstall when service worker unavailable
- Set __BUILD_TIME__ to null in dev mode for conditional rendering
- Skip service worker registration when running in dev mode to avoid 404 errors
- Add isle.js and isle.wasm copy step to production build
- Add build:ci script for CI builds without required wasm files
- Replace vanilla JS with Svelte 5 components
- Add Vite build system with Terser optimization
- Reorganize assets into src/ and public/ directories
- Update README with setup instructions