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/home-client.tsx

@@ -399,23 +399,26 @@ export function HomeClient({ initialNotes, initialSettings }: HomeClientProps) {
         <div className="text-center py-8 text-gray-500">{t('general.loading')}</div>
       ) : (
         <>
-          <FavoritesSection
-            pinnedNotes={pinnedNotes}
-            onEdit={(note, readOnly) => setEditingNote({ note, readOnly })}
-            onSizeChange={handleSizeChange}
-          />
+          {!isTabs && (
+            <FavoritesSection
+              pinnedNotes={pinnedNotes}
+              onEdit={(note, readOnly) => setEditingNote({ note, readOnly })}
+              onSizeChange={handleSizeChange}
+            />
+          )}
 
           {(notes.filter((note) => !note.isPinned).length > 0 || isTabs) && (
             <div className={cn(isTabs && 'flex min-h-0 flex-1 flex-col')}>
               <NotesMainSection
                 viewMode={notesViewMode}
-                notes={notes.filter((note) => !note.isPinned)}
+                notes={isTabs ? notes : notes.filter((note) => !note.isPinned)}
                 onEdit={(note, readOnly) => setEditingNote({ note, readOnly })}
                 onSizeChange={handleSizeChange}
                 currentNotebookId={searchParams.get('notebook')}
                 noteHistoryMode={noteHistoryMode}
                 onOpenHistory={handleOpenHistory}
                 onEnableHistory={handleEnableHistory}
+                onNoteCreated={handleNoteCreated}
               />
             </div>
           )}