Adds a minimal Svelte 5 i18n primitive (`src/lib/i18n/`) backing the
login form, the layout blocker page, and the lobby placeholder.
SUPPORTED_LOCALES drives both the picker and the runtime lookup;
adding a language is a two-step change inside `src/lib/i18n/`.
Login form gains a globe-icon language dropdown (English / Русский
in their native names), defaulting to navigator.languages with `en`
as the fallback. Switching the locale re-renders the form in place;
on submit, the locale rides in the JSON body of `send-email-code`
because Safari/WebKit silently drops JS-set Accept-Language. Gateway
gains a body `locale` field that takes priority over the request
header for preferred-language resolution.
Email and code inputs disable browser autofill / suggestions
(`autocomplete=off` + `autocorrect=off` + `autocapitalize=off` +
`spellcheck=false`) so Keychain / address-book pickers and
remembered-value dropdowns no longer fire on focus.
Cross-cuts:
- backend & gateway openapi: clarify that body `locale` is honored.
- docs/FUNCTIONAL{,_ru}.md §1.2: document body-vs-header priority.
- gateway tests: body `locale` overrides Accept-Language; blank
body `locale` falls back to header.
- new ui/docs/i18n.md; cross-links from auth-flow.md and ui/README.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Implements ui/PLAN.md Phase 7 end-to-end:
- /login two-step form (email -> code) over the gateway public REST
surface; /lobby placeholder issues the first authenticated
user.account.get and renders the decoded display name.
- SessionStore (Svelte 5 runes) with loading / unsupported / anonymous /
authenticated states; layout-level route guard, browser-not-supported
blocker, and a minimal SubscribeEvents revocation watcher that closes
the active client within 1s on a clean stream end or
Unauthenticated.
- VITE_GATEWAY_BASE_URL + VITE_GATEWAY_RESPONSE_PUBLIC_KEY config plus
AuthError taxonomy in api/auth.ts.
- Vitest (auth-api, session-store, login-page) and Playwright e2e
(auth-flow.spec.ts) on the four configured projects, with a fixture
Ed25519 keypair forging Connect-Web JSON responses.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Ilia Denisov