feat: add i18n with LingUI, Crowdin integration, and typed error codes (#16)

* feat: add i18n with LingUI, Crowdin integration, and typed error codes

- Add `@sofa/i18n` shared package with LingUI v5 (v6-ready config using
  `defineConfig` + `@lingui/format-po`), eager English + lazy-loaded
  fr/de/es/it/pt catalogs, `Intl`-based date/number format utilities,
  and test helpers
- Wire `@lingui/vite-plugin` + babel macro plugin for web, and
  `@lingui/metro-transformer` + babel config for native
- Add `I18nProvider` to both app roots with locale auto-detection
  (navigator.language / expo-localization) and persistence
  (localStorage / MMKV)
- Wrap all ~512 user-facing strings across web and native with LingUI
  macros (`<Trans>`, `useLingui`/`t`, `i18n._(msg`...`)`, `plural`)
- Add language switcher to Settings in both apps
- Add `@sofa/api/errors` with 13 typed `AppErrorCode` values and
  `appErrorData()` helper for contract `.errors()` schemas
- Update all oRPC contract error definitions with typed `data` fields;
  convert import procedure `throw new Error()` to `ORPCError` with codes
- Add per-app `error-messages.ts` utilities that map error codes to
  localized strings; update global `QueryCache.onError` handlers to stop
  leaking raw `error.message` to users
- Add `crowdin.yml` config and `.github/workflows/crowdin.yml` for
  automated source upload on merge and translation pull via dispatch
- Add `lingui.config.ts` at repo root with `bun run i18n:extract` and
  `bun run i18n:compile` convenience scripts

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* chore: add Crowdin language mapping and ignore context file

* fix(i18n): address 20 localization quality issues

- Stop leaking raw error.message to users in change-password and
  account-section; use localized fallbacks instead
- Add typed error data to discover contract's .errors() schema
- Replace all manual English plural suffixes with LingUI plural() macro
  in episode counts, backup counts, star ratings, title/image counts
- Replace date-fns formatDistanceToNow and hardcoded date patterns with
  locale-aware formatDate/formatRelativeTime from @sofa/i18n/format
- Convert integration-configs from module-scope translations (frozen at
  import time) to lazy getIntegrationConfigs(i18n) function
- Combine split Trans fragments into single translatable units in
  backup-schedule retention sentence and stats-display period labels
- Localize TV media type badge and full episode accessibilityLabel
- Replace Android-incompatible Alert.alert language picker (max 3
  buttons) with zeego DropdownMenu
- Await async locale initialization before hiding splash screen so
  non-English users don't see English flash on cold start
- Add @lingui/core as direct native app dependency

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* fix(i18n): add Intl polyfills for Hermes, replace DropdownMenu language picker, and remove date-fns
- Add `@formatjs/intl-*` polyfills loaded at app startup in `intl-polyfills.ts` so Hermes on Android has full `Intl` support for locale-aware formatting
- Alias `@formatjs/icu-messageformat-parser` to its `no-parser` variant in metro config to reduce bundle size
- Replace the zeego `DropdownMenu` language picker in Settings with a new `SelectModal` component that works reliably on all platforms without the Android 3-button limit
- Replace `date-fns` `format`/`parseISO` in `person/[id].tsx` with `formatDate` from `@sofa/i18n/format`; remove `date-fns` from native and web `package.json`
- Refactor `StatusActionButton` to use a `StatusLabel` component with `<Trans>` rather than a `getStatusConfig(t)` factory so labels are always reactive to locale changes
- Fix crowdin workflow to use root `bun run i18n:compile` script instead of `cd packages/i18n && bun run compile`
- Wrap root layout `GestureHandlerRootView` in `SafeAreaProvider` and add `.catch` to locale-ready promise to prevent unhandled rejections blocking the splash screen

* fix(i18n): localize integration status helpers, fix stats-display Trans wrapping, and clean up SelectModal
- Localize `webhookStatus` and `listStatus` in `integration-card.tsx` using `i18n._(msg`...`)` so status strings are translated instead of always rendering in English
- Wrap "Movies {select}" and "Episodes {select}" in a single `<Trans>` in `stats-display.tsx` so the period selector element is embedded inside the translatable unit rather than concatenated outside it
- Fix locale activation order in Settings: close the modal first, then `activateLocale`, and only call `setPersistedLocale` on success to avoid persisting a locale that failed to load
- Remove the redundant `SafeAreaProvider`/`SafeAreaView` wrapper from `SelectModal` — the root layout already provides `SafeAreaProvider`
- Recompile all six `.po`/`.ts` catalogs to pick up new and updated message strings

* chore(i18n): crowdin sync

---------

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.github/workflows/crowdin.yml

@@ -0,0 +1,68 @@
+name: Crowdin Sync
+
+on:
+  push:
+    branches: [main]
+    paths:
+      - "packages/i18n/src/po/en.po"
+  workflow_dispatch:
+
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  upload:
+    name: Upload sources
+    runs-on: ubuntu-latest
+    if: github.event_name == 'push'
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Upload sources to Crowdin
+        uses: crowdin/github-action@v2
+        with:
+          upload_sources: true
+          upload_translations: false
+          download_translations: false
+          config: crowdin.yml
+        env:
+          CROWDIN_PROJECT_ID: ${{ secrets.CROWDIN_PROJECT_ID }}
+          CROWDIN_PERSONAL_TOKEN: ${{ secrets.CROWDIN_PERSONAL_TOKEN }}
+
+  download:
+    name: Download translations
+    runs-on: ubuntu-latest
+    if: github.event_name == 'workflow_dispatch'
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: oven-sh/setup-bun@v2
+
+      - run: bun install --frozen-lockfile
+
+      - name: Download translations from Crowdin
+        uses: crowdin/github-action@v2
+        with:
+          upload_sources: false
+          upload_translations: false
+          download_translations: true
+          create_pull_request: true
+          pull_request_title: "chore(i18n): update translations from Crowdin"
+          pull_request_body: "Automated PR with latest translations from Crowdin."
+          config: crowdin.yml
+        env:
+          CROWDIN_PROJECT_ID: ${{ secrets.CROWDIN_PROJECT_ID }}
+          CROWDIN_PERSONAL_TOKEN: ${{ secrets.CROWDIN_PERSONAL_TOKEN }}
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Compile catalogs
+        run: bun run i18n:compile
+
+      - name: Commit compiled catalogs
+        run: |
+          git config user.name "github-actions[bot]"
+          git config user.email "github-actions[bot]@users.noreply.github.com"
+          git add packages/i18n/src/po/
+          git diff --cached --quiet || git commit -m "chore(i18n): compile updated translation catalogs"
+          git push

.github/workflows/eas-build.yml

@@ -23,6 +23,7 @@ on:
     paths:
       - apps/native/**
       - packages/api/**
+      - packages/i18n/**
 
 jobs:
   build: