feat: french translation (#802)

* Add French (fr) language support

- Create app/src/i18n/locales/fr/translation.json with full UI translations
- Register French in SUPPORTED_LANGUAGES and i18next resources
- Wire French locale from date-fns for relative date formatting

* Fix Vite file watcher EBUSY error on Windows by excluding Rust target directory

app/src/i18n/index.ts

@@ -6,6 +6,7 @@ import ja from './locales/ja/translation.json';
 import ptBR from './locales/pt-BR/translation.json';
 import zhCN from './locales/zh-CN/translation.json';
 import zhTW from './locales/zh-TW/translation.json';
+import fr from './locales/fr/translation.json';
 
 export const SUPPORTED_LANGUAGES = [
   { code: 'en', label: 'English' },
@@ -13,6 +14,7 @@ export const SUPPORTED_LANGUAGES = [
   { code: 'ja', label: '日本語' },
   { code: 'zh-CN', label: '简体中文' },
   { code: 'zh-TW', label: '繁體中文' },
+  { code: 'fr', label: 'Français' },
 ] as const;
 
 export type LanguageCode = (typeof SUPPORTED_LANGUAGES)[number]['code'];
@@ -27,6 +29,7 @@ i18n
       ja: { translation: ja },
       'zh-CN': { translation: zhCN },
       'zh-TW': { translation: zhTW },
+      fr: { translation: fr },
     },
     fallbackLng: 'en',
     supportedLngs: SUPPORTED_LANGUAGES.map((l) => l.code),

app/src/lib/utils/format.ts

@@ -1,5 +1,5 @@
 import { formatDistance } from 'date-fns';
-import { ja, zhCN, zhTW } from 'date-fns/locale';
+import { ja, zhCN, zhTW, fr } from 'date-fns/locale';
 import i18n from '@/i18n';
 
 export function formatDuration(seconds: number): string {
@@ -16,6 +16,8 @@ function getDateLocale() {
       return zhCN;
     case 'zh-TW':
       return zhTW;
+    case 'fr':
+      return fr;
     default:
       return undefined;
   }

tauri/vite.config.ts

@@ -27,7 +27,7 @@ export default defineConfig({
     strictPort: true,
     // Watch files in the app directory for changes
     watch: {
-      ignored: ['!**/../app/**'],
+      ignored: ['!**/../app/**', '**/target/**'],
     },
   },
   envPrefix: ['VITE_', 'TAURI_'],