✨ Quality: Improve useTranslator robustness and coverage

[galiprandi]

💡 What:

• Extracted hardcoded list of supported languages into a SUPPORTED_LANGUAGES constant in useTranslator.ts.
• Added security checks to ensure experimental AI globals (Translator, LanguageDetector) are not base constructors (Object, Array, Function).
• Enhanced JSDoc for the useTranslator hook and its return interface with detailed descriptions and examples.
• Created lib/hooks/useTranslator.coverage.test.ts achieving 100% line coverage and >94% branch coverage for the hook.

🎯 Why:

• The hook had significant coverage gaps in its language detection and initialization logic.
• Experimental browser APIs require defensive checks to prevent runtime errors in inconsistent environments.
• Improved documentation helps developers understand the hook's behavior and return values more effectively.

📊 Impact:

• Increased overall codebase reliability by covering edge cases for experimental AI APIs.
• Improved maintainability through constant extraction and documentation.
• Higher test coverage for critical logic.

✅ Verification:

• Ran pnpm test (all 510 tests passed).
• Verified coverage for useTranslator.ts reached 100% lines.
• Ran formatting to ensure code quality.

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PR created automatically by Jules for task 5640543773526923089 started by @galiprandi

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[galiprandi]

Closing in favor of #99 (merged). #99 adds the same SUPPORTED_LANGUAGES extraction and base-constructor security guards with a minimal diff. The full prettier reformat of useTranslator.ts included here is better done in a single consistent pass across all hooks. Thanks for the contribution.

[google-labs-jules]

Closing in favor of #99 (merged). #99 adds the same SUPPORTED_LANGUAGES extraction and base-constructor security guards with a minimal diff. The full prettier reformat of useTranslator.ts included here is better done in a single consistent pass across all hooks. Thanks for the contribution.

Understood. Acknowledging that this work is now obsolete in favor of #99 and stopping work on this task. Thank you for the update.