feat(i18n): add Estonian language support

[Sym-jay]

Overview

Adds Estonian language support infrastructure to the application.

Changes

• Updated language type definitions to include 'et' locale
• Added Estonian to TVDB language mapping (est)
• Translations to be added via Weblate at https://translate.seerr.dev

Note

This PR removes the translation file per maintainer feedback. Translations should be managed through Weblate to avoid breaking the translation workflow.

Summary by CodeRabbit

• New Features
  • Added Estonian (Eesti) locale across the app: UI language, locale fallbacks, and translations are now available.
  • Updated language handling so Estonian preferences are recognized and mapped for external content lookups.

[coderabbitai]

📝 Walkthrough

Walkthrough

Adds Estonian locale support: inserts et: 'est' into TMDB→TVDB mapping, includes 'et' in AvailableLocale type, registers et in frontend language context, and loads et translations in the app bootstrap.

Changes

Cohort / File(s)	Summary
API mapping & types server/api/tvdb/interfaces.ts, server/types/languages.d.ts	Added et: 'est' to TMDB_TO_TVDB_MAPPING and included 'et' in the AvailableLocale union type.
Frontend language registration src/context/LanguageContext.tsx, src/pages/_app.tsx	Added et entry to availableLanguages and added locale import/fallback for et in the app loader to enable Estonian translations.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Possibly related issues

• Add Estonian (et) language support #2529: Matches the change request to add Estonian (et) language support across mappings, types, and UI locale registration.

Poem

🐰✨ A tiny hop, a new "et" to chart,
Maps and types now speak from the heart.
Frontend learns words, the app hums a tune,
Eesti joins morning beneath the moon.

🚥 Pre-merge checks | ✅ 2

✅ Passed checks (2 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title 'feat(i18n): add Estonian language support' accurately summarizes the main objective of the changeset, which is to add infrastructure support for the Estonian language across multiple files and systems.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands and usage tips.}

[gauthier-th]

You forgot to add the new language to src/context/LanguageContext.tsx and src/pages/_app.tsx

[coderabbitai]

Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents

Verify each finding against the current code and only fix it if needed.

Inline comments:
In `@src/pages/_app.tsx`:
- Around line 49-50: The switch in src/pages/_app.tsx includes a case 'et' that
dynamically imports '../i18n/locale/et.json', but that file is missing; either
add a new JSON file at src/i18n/locale/et.json containing the Estonian
translations (matching the shape of the other locale files) or remove the case
'et' from the switch in _app.tsx so the code does not attempt the failing
dynamic import; ensure whichever path you choose keeps the switch/default
behavior consistent with other locales.

---

ℹ️ Review info

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between e0d7499 and 0ddf374.

📒 Files selected for processing (4)

• server/api/tvdb/interfaces.ts
• server/types/languages.d.ts
• src/context/LanguageContext.tsx
• src/pages/_app.tsx

🚧 Files skipped from review as they are similar to previous changes (1)

• server/api/tvdb/interfaces.ts