phase 8: lobby UI + cross-stack lobby command catalog + TS FlatBuffers

- Extend pkg/model/lobby and pkg/schema/fbs/lobby.fbs with public-games
  list, my-applications/invites lists, game-create, application-submit,
  invite-redeem/decline. Mirror the matching transcoder pairs and Go
  fixture round-trip tests.
- Wire the seven new lobby message types through
  gateway/internal/backendclient/{routes,lobby_commands}.go with
  per-command REST helpers, JSON-tolerant decoding of backend wire
  shapes, and httptest-based unit coverage for success / 4xx / 5xx /
  503 across each command.
- Introduce TS-side FlatBuffers via the `flatbuffers` runtime dep, a
  `make fbs-ts` target driving flatc, and the generated bindings under
  ui/frontend/src/proto/galaxy/fbs. Phase 7's `user.account.get` decode
  now uses these bindings as well, closing the JSON.parse vs
  FlatBuffers gap that would have failed against a real local stack.
- Replace the placeholder lobby with five sections (my games, pending
  invitations, my applications, public games, create new game) and the
  /lobby/create form. Submit-application uses an inline race-name
  form on the public-game card; create-game keeps name / description /
  turn_schedule / enrollment_ends_at always visible and the rest under
  an Advanced toggle with TS-side defaults.
- Update lobby/+page.svelte to throw LobbyError on non-ok result codes;
  GalaxyClient.executeCommand now returns { resultCode, payloadBytes }.
- Vitest binding round-trips, lobby.ts wrapper unit tests, lobby-page
  + lobby-create component tests, Playwright lobby-flow.spec covering
  create / submit / accept across all four projects. Phase 7 e2e was
  migrated to the FlatBuffers fixtures and to click+fill against the
  Safari-autofill readonly inputs.
- Mark Phase 8 done in ui/PLAN.md, mirror the wire-format note into
  Phase 7, append the new lobby commands to gateway/README.md and
  docs/ARCHITECTURE.md, add ui/docs/lobby.md.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

ui/frontend/src/lib/i18n/locales/ru.ts

@@ -36,6 +36,53 @@ const ru: Record<keyof typeof en, string> = {
 	"lobby.greeting": "здравствуйте, {name}!",
 	"lobby.account_loading": "загрузка профиля…",
 	"lobby.logout": "выйти",
+	"lobby.section.my_games": "мои игры",
+	"lobby.section.invitations": "ожидающие приглашения",
+	"lobby.section.applications": "мои заявки",
+	"lobby.section.public_games": "публичные игры",
+	"lobby.section.create": "создать игру",
+	"lobby.create_button": "создать новую игру",
+	"lobby.my_games.empty": "пока нет игр",
+	"lobby.invitations.empty": "приглашений нет",
+	"lobby.applications.empty": "заявок нет",
+	"lobby.public_games.empty": "публичных игр нет",
+	"lobby.invitation.accept": "принять",
+	"lobby.invitation.decline": "отклонить",
+	"lobby.application.submit": "подать заявку",
+	"lobby.application.submit_for": "подать заявку в {name}",
+	"lobby.application.race_name_label": "название расы",
+	"lobby.application.race_name_required": "название расы не должно быть пустым",
+	"lobby.application.cancel": "отмена",
+	"lobby.application.submitted": "заявка отправлена, ожидает одобрения",
+	"lobby.application.status.pending": "ожидает",
+	"lobby.application.status.approved": "одобрена",
+	"lobby.application.status.rejected": "отклонена",
+	"lobby.application.status.unknown": "{status}",
+	"lobby.list_loading": "загрузка…",
+	"lobby.create.title": "создание новой игры",
+	"lobby.create.game_name_label": "название игры",
+	"lobby.create.description_label": "описание",
+	"lobby.create.turn_schedule_label": "расписание ходов",
+	"lobby.create.turn_schedule_hint": "cron из пяти полей, например 0 0 * * *",
+	"lobby.create.enrollment_ends_at_label": "окончание набора",
+	"lobby.create.advanced": "дополнительно",
+	"lobby.create.min_players_label": "мин. игроков",
+	"lobby.create.max_players_label": "макс. игроков",
+	"lobby.create.start_gap_hours_label": "интервал старта (часы)",
+	"lobby.create.start_gap_players_label": "интервал старта (игроки)",
+	"lobby.create.target_engine_version_label": "версия движка",
+	"lobby.create.submit": "создать",
+	"lobby.create.submitting": "создаём…",
+	"lobby.create.cancel": "отмена",
+	"lobby.create.game_name_required": "название игры не должно быть пустым",
+	"lobby.create.turn_schedule_required": "расписание ходов не должно быть пустым",
+	"lobby.create.enrollment_ends_at_required": "время окончания набора обязательно",
+	"lobby.error.invalid_request": "запрос некорректен",
+	"lobby.error.subject_not_found": "объект не найден",
+	"lobby.error.forbidden": "операция запрещена",
+	"lobby.error.conflict": "запрос конфликтует с текущим состоянием",
+	"lobby.error.internal_error": "внутренняя ошибка сервера",
+	"lobby.error.unknown": "{message}",
 };
 
 export default ru;