feat: Add French translation (fr)

[JohnPT99]

🌐 Add French localization

Context

This PR adds French as a supported language. Only the i18n layer has been touched — no components, no business logic.

Affected files

File	Type	Description
messages/fr.json	✨ New	Full French translations
lib/locales.ts	✏️ Modified	Register the fr locale
messages/en.json	✏️ Modified	Key harmonization
messages/de.json	✏️ Modified	Key harmonization
messages/es.json	✏️ Modified	Key harmonization
messages/it.json	✏️ Modified	Key harmonization
README.md	✏️ Modified	Mention French support

What did NOT change

• No UI component changes
• No business logic changes
• No server/build configuration changes

Testing

Verify that the language selector correctly displays fr and that translations are properly applied.

Summary by CodeRabbit

• New Features
  • Added French language support. Users can now select French as their interface language with complete translations across all application features and menus.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: f6960fba-6587-439e-a78e-2ecff2f0c9fd

📥 Commits

Reviewing files that changed from the base of the PR and between ddf251e and deadedf.

📒 Files selected for processing (7)

• README.md
• lib/locales.ts
• messages/de.json
• messages/en.json
• messages/es.json
• messages/fr.json
• messages/it.json

---

📝 Walkthrough

Walkthrough

This PR adds comprehensive French language support to the application by registering the "fr" locale in lib/locales.ts, updating language name mappings across existing translation files, creating a complete French translation catalog, and updating documentation.

Changes

Cohort / File(s)	Summary
Localization Configuration & Documentation lib/locales.ts, README.md	Registered French locale by adding "fr" to the exported locales tuple, importing French date-fns locale, and updating the dateFnsLocales mapping; updated README Features table to list French among supported languages.
Language Label Updates messages/de.json, messages/en.json, messages/es.json, messages/it.json	Added French language label entry to the language map in each existing translation file (e.g., "fr": "Français", "French", "Francés", "Francese").
French Translation Catalog messages/fr.json	Created new French translation file with 818 lines of complete UI translations covering actions, validation, forms, app branding, calendar/notes/shifts management, statistics, sync/notifications, authentication, sharing, administration, and related feature domains.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~12 minutes

Possibly related PRs

• feat: Add Spanish translation (es) #129: Modifies the same localization surface (lib/locales.ts, messages/\*.json) to register and support a new locale.
• feat: centralize localization logic #43: Extends centralized lib/locales.ts exported locales/Locale types and date-fns mapping to add French support.
• feat: Adds update checks and changelog UI #65: Modifies supported locales list and date-fns locale mappings to introduce new locale entries.

Suggested labels

enhancement

Suggested reviewers

• panteLx
• AmandineP83

Poem

🐰 Bonjour, mon ami! With whiskers held high,
French words now dance across every reply,
From locale to locale, the translations take flight,
A new language blooms—voilà, pure delight! ✨

🚥 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 pull request title 'feat: Add French translation (fr)' clearly and concisely describes the main change: adding French language support through translations.
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.}

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

---

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.}

Tip

You can disable sequence diagrams in the walkthrough.

Disable the reviews.sequence_diagrams setting to disable sequence diagrams in the walkthrough.

[panteLx]

Thank you!

[panteLx]

@JohnPT99 your added language is now available in the :latest tag and v2.2.1

Sorry for the delayed merge!