Overhaul the web UI with CSS custom property-based theming and
dark mode support. Extract reusable template partials (location
search, scan input) and web components (photo-capture,
searchable-select). Add version and commit info to page footer.
- Replace hardcoded amber palette with semantic theme tokens
- Add dark mode with localStorage persistence and system preference detection
- Extract <brew-photo-capture> and <searchable-select> web components
- Extract location_search and scan_input Askama macros
- Add sun/moon, timeline, database, map icons
- Display version and git commit in footer
- Improve timeline coordinate rounding and map link formatting
- Add roast_name, roaster_name, remaining to BagOptionView
Replace username/password authentication with FIDO2/WebAuthn passkey-based
auth using webauthn-rs. Sessions and bearer tokens are unchanged — only the
way they are created changes.
- Add webauthn-rs, uuid, open, url deps; remove argon2, rpassword
- Add passkey_credentials and registration_tokens tables (migrations 17-18)
- Add domain entities, typed IDs, and repository traits for passkeys/tokens
- Add SQL repository implementations for passkeys and registration tokens
- Add ChallengeStore for in-memory WebAuthn ceremony state
- Add WebAuthn route handlers (register/auth start+finish ceremonies)
- Add CLI browser handoff for token creation (opens browser, local callback)
- Replace login form with "Sign in with Passkey" button
- Add registration page for first-user bootstrap via one-time token
- Replace BREWLOG_ADMIN_USERNAME/PASSWORD with BREWLOG_RP_ID/RP_ORIGIN
- Change default BREWLOG_URL from 127.0.0.1 to localhost (WebAuthn requires it)
