freezmo/components/TabBar.tsx
Martin Dvorak 618ad5fb9c Add an English/Czech interface language switch
English stays the default; Czech is a full translation. Only the app chrome
is translated - notes and generated decks keep their own language, which is a
core feature, not a setting.

i18n
- lib/i18n-dict.ts: flat en/cs dictionaries (441 keys each), translate() and
  translatePlural() with real Czech plural rules (1 sada / 2-4 sady / 5+ sad).
  English is the default and the fallback for a missing key.
- lib/i18n.ts: browser store (freezmo.locale.v1), useI18n() hook, and the
  x-freezmo-locale header. The hook's t/plural are bound to the locale React
  is rendering with, so the first client render matches the server HTML and
  then re-renders in the stored language; module-level t is only for event
  handlers and non-React helpers.
- <html lang> follows the choice (inline script + setLocale).

UI
- Settings -> Language segmented control (English / Cestina), plus an EN/CS
  button on the key gate for first run.
- Every screen translated: sidebar, header, tab bar, library, deck cards,
  folder bar, create flow, all seven activities, study chrome, results,
  settings + health panel, API-key gate and help, install sheet, offline and
  the deck-not-found page.
- Plural-aware counts everywhere (decks, folders, activities, runs, photos,
  documents, pages, words, wrong attempts).

Server
- API routes and guards (generate, grade, health, http-guard, rate-limit,
  ollama error mapping) answer in the request's language, so error cards and
  the health panel never fall back to English mid-sentence.

Fixes
- A hydration mismatch when a non-default locale was stored silently dropped
  the .dark class after hydration; render-time t() is now bound to the
  hook's locale (UploadScreen.describeExtraction, ResultsScreen.answerFor,
  DeckCard's folder fallback).
- Bumped the service worker cache to freezmo-v4 for this deploy.

Tests: i18n 27/27 (gate toggle, persistence, html lang, Czech plurals,
settings switch) and a rebuilt regression suite 72/72 (English default,
library, create, all 7 activity types, results, settings, install sheet,
offline, PWA, security, Czech smoke).
2026-10-08 13:56:32 +00:00

49 lines
1.7 KiB
TypeScript

"use client";
import Link from "next/link";
import { usePathname } from "next/navigation";
import { GearIcon, HomeIcon, PlusIcon } from "@/components/icons";
import { useI18n } from "@/lib/i18n";
import { openSettings } from "@/lib/ui-events";
import { cn } from "@/lib/utils";
/**
* iOS-style bottom tab bar. Rendered on the library and create screens on
* phones; hidden on desktop (the header carries the same actions there) and on
* the full-screen study feed.
*/
export function TabBar() {
const pathname = usePathname();
const { t } = useI18n();
const item = "flex flex-1 flex-col items-center justify-center gap-1 py-2 text-[11px] font-medium transition-colors";
const active = "text-[var(--text)]";
const idle = "text-[var(--text-subtle)]";
return (
<nav
aria-label={t("tabbar.main")}
className="tabbar fixed inset-x-0 bottom-0 z-40 flex items-stretch pb-safe sm:hidden"
>
<Link href="/" aria-current={pathname === "/" ? "page" : undefined} className={cn(item, pathname === "/" ? active : idle)}>
<HomeIcon className="size-6" />
{t("common.library")}
</Link>
<Link
href="/create"
aria-current={pathname === "/create" ? "page" : undefined}
className={cn(item, pathname === "/create" ? active : idle)}
>
<span className="grad-ice grid size-6 place-items-center rounded-full text-[#06111f]">
<PlusIcon className="size-4" />
</span>
{t("common.newDeck")}
</Link>
<button type="button" onClick={openSettings} className={cn(item, idle)}>
<GearIcon className="size-6" />
{t("common.settings")}
</button>
</nav>
);
}