refactor: extract Icons and InlineFormActions UI components

- Add Icons.tsx: IconEdit, IconTrash, IconDuplicate, IconPlus, IconCheck, IconClose
- Add InlineFormActions.tsx: unified Annuler/Ajouter-Enregistrer button pair
- Replace inline SVGs in SwotCard, YearReviewCard, WeeklyCheckInCard, SwotQuadrant,
  YearReviewSection, WeeklyCheckInSection, EditableTitle, Modal, GifMoodCard

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/components/ui/index.ts

@@ -12,6 +12,8 @@ export {
   EditableWeatherTitle,
   EditableGifMoodTitle,
 } from './EditableTitles';
+export { IconEdit, IconTrash, IconDuplicate, IconPlus, IconCheck, IconClose } from './Icons';
+export { InlineFormActions } from './InlineFormActions';
 export { PageHeader } from './PageHeader';
 export { SessionPageHeader } from './SessionPageHeader';
 export { Input } from './Input';