feat: image AI titles (3 suggestions), describe-images action, pin/list fixes, i18n

- Add image description service + API route for AI-powered image analysis
- Image title generation returns 3 selectable suggestions via TitleSuggestions component
- Add "Describe images" action in AI assistant (individual + collective)
- Fix pin refresh propagation in card and tabs view
- Fix note creation refresh in tabs mode, pass all notes to tabs view
- Add RTL support (dir="auto") on note content elements
- Pass UI language dynamically to AI endpoints instead of hardcoded 'fr'
- Add 18 missing i18n keys in both en.json and fr.json
- Sparkles button on images for AI title generation (bottom-right, pulse animation)

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

memento-note/components/notes-main-section.tsx

@@ -28,6 +28,7 @@ interface NotesMainSectionProps {
   noteHistoryMode?: 'manual' | 'auto'
   onOpenHistory?: (note: Note) => void
   onEnableHistory?: (noteId: string) => Promise<void>
+  onNoteCreated?: (note: Note) => void
 }
 
 export function NotesMainSection({
@@ -39,6 +40,7 @@ export function NotesMainSection({
   noteHistoryMode = 'manual',
   onOpenHistory,
   onEnableHistory,
+  onNoteCreated,
 }: NotesMainSectionProps) {
   if (viewMode === 'tabs') {
     return (
@@ -50,6 +52,7 @@ export function NotesMainSection({
           noteHistoryMode={noteHistoryMode}
           onOpenHistory={onOpenHistory}
           onEnableHistory={onEnableHistory}
+          onNoteCreated={onNoteCreated}
         />
       </div>
     )