- Add comprehensive type definitions for vendor libraries (Chart.js, topbar)
- Add TypeScript types for LiveView hooks and WebAuthn interfaces
- Convert all JS files to TypeScript with proper typing:
- app.js → app.ts
- webauthn.js → webauthn.ts
- webauthn_utils.js → webauthn_utils.ts
- passkey_settings.js → passkey_settings.ts
- passkey_login.js → passkey_login.ts
- passkey_discoverable.js → passkey_discoverable.ts
- Update tsconfig.json with modern ES2022 and strict type checking
- Update esbuild config to use app.ts as entry point
- All assets compile successfully with esbuild's native TypeScript support
- No node_modules required, following Phoenix/Elixir conventions
