feat(i18n): add Hungarian translation

[Szotasz]

Base Branch

• This PR targets the develop branch (required for all feature/fix PRs)
• This PR targets main (hotfix only - maintainers)

Description

This PR adds full Hungarian (hu) localization support to the application. It includes 11 new JSON files covering the entire UI and registers the 'hu' locale in the configuration files.

Related Issue

Closes N/A

Type of Change

• 🐛 Bug fix
• ✨ New feature
• 📚 Documentation
• ♻️ Refactor
• 🧪 Test

Area

• Frontend
• Backend
• Fullstack

Commit Message Format

Follow conventional commits: <type>: <subject>

Types: feat, fix, docs, style, refactor, test, chore

Example: feat: add user authentication system

Checklist

• I've synced with develop branch
• I've tested my changes locally
• I've followed the code principles (SOLID, DRY, KISS)
• My PR is small and focused (< 400 lines ideally)
• (Python only) All file operations specify encoding="utf-8" for text files

Platform Testing Checklist

CRITICAL: This project supports Windows, macOS, and Linux. Platform-specific bugs are a common source of breakage.

• Windows tested (either on Windows or via CI)
• macOS tested (tested locally on macOS)
• Linux tested (CI covers this)
• Used centralized platform/ module instead of direct process.platform checks
• No hardcoded paths (used findExecutable() or platform abstractions)

If you only have access to one OS: CI now tests on all platforms. Ensure all checks pass before submitting.

CI/Testing Requirements

• All CI checks pass on all platforms (Windows, macOS, Linux)
• All existing tests pass
• New features include test coverage
• Bug fixes include regression tests

Screenshots

Before	After

Feature Toggle

• Behind localStorage flag: use_feature_name
• Behind settings toggle
• Behind environment variable/config
• N/A - Feature is complete and ready for all users

Breaking Changes

Breaking: No

Details:
N/A - This PR only adds new localization files and does not modify existing logic or APIs.

Summary by CodeRabbit

• New Features
  • Hungarian language support is now available across the app (navigation, settings, dialogs, tasks, onboarding, terminal, GitLab flows, errors, welcome, task review, and other UI areas).
  • Hungarian has been added to the app's language selector so users can choose Magyar as their interface language.

_{✏️ Tip: You can customize this high-level summary in your review settings.}

[CLAassistant]

All committers have signed the CLA.

[gemini-code-assist]

Summary of Changes

Hello @Szotasz, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request significantly expands the application's internationalization capabilities by introducing complete Hungarian language support. This enhancement allows Hungarian-speaking users to interact with the application in their native language, improving accessibility and user experience. The changes involve adding new translation files and updating core configuration to recognize and utilize the new locale.

Highlights

• Hungarian Localization Added: Full Hungarian (hu) localization support has been integrated into the application's frontend.
• New Translation Files: Eleven new JSON files have been added, providing comprehensive Hungarian translations for various UI components and features.
• Configuration Updates: The SupportedLanguage type and AVAILABLE_LANGUAGES constant in i18n.ts have been updated to include 'hu'. Additionally, the new Hungarian locale resources are imported and registered in index.ts.

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CodeRabbit has detected other AI code review bot(s) in this pull request and will avoid duplicating their findings in the review comments. This may lead to a less comprehensive review.

📝 Walkthrough

Walkthrough

Adds Hungarian (hu) frontend language support: updates supported language type and AVAILABLE_LANGUAGES, registers Hungarian translation resources, and adds 11 new Hungarian locale JSON files covering UI namespaces.

Changes

Cohort / File(s)	Summary
I18n Constants & Types apps/frontend/src/shared/constants/i18n.ts	Add 'hu' to SupportedLanguage and append Hungarian entry to AVAILABLE_LANGUAGES.
I18n Resource Registration apps/frontend/src/shared/i18n/index.ts	Import Hungarian translation modules and register hu key with namespaces (common, navigation, settings, tasks, welcome, onboarding, dialogs, gitlab, taskReview, terminal, errors).
Hungarian Locale Files apps/frontend/src/shared/i18n/locales/hu/*	Add 11 locale JSON files: common.json, dialogs.json, errors.json, gitlab.json, navigation.json, onboarding.json, settings.json, tasks.json, taskReview.json, terminal.json, welcome.json (comprehensive UI translations).

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Possibly related PRs

• Bulk Select All & Create PR for Human Review Column #1248 — Adds Hungarian locale entries and exposes hu in i18n resources, overlapping the same namespaces (taskReview, tasks).
• feat: add terminal dropdown with inbuilt and external options in task review #347 — Updates the i18n resources mapping; related at the code-level registration in apps/frontend/src/shared/i18n/index.ts.
• feat: add i18n internationalization system #248 — Earlier extension of i18n constants/resources that this change builds upon (adds hu locale and mappings).

Suggested labels

area/frontend, size/M, 🔄 Checking

Suggested reviewers

• AlexMadera
• MikeeBuilds
• AndyMik90

Poem

🐰 I hopped through keys and strings so true,

Magyar petals in the UI grew,
Eleven files, a bright new hue,
Magyar whispers, hello, hu!

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 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 Hungarian translation' is directly related to the main changeset, which adds comprehensive Hungarian localization support across 11 translation files and updates language configuration.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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

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Codecov Report

✅ All modified and coverable lines are covered by tests.

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[gemini-code-assist]

Code Review

This pull request introduces Hungarian language support to the application by adding 11 new JSON translation files and updating the i18n configuration. The changes are well-structured and follow the existing localization patterns. I've found a couple of minor typos in the new Hungarian translation files and have left specific suggestions for them. Otherwise, this is a great addition.