feat: brainstorm sessions, PDF document Q&A, embedding fixes, and UI improvements

- Add brainstorm feature with collaborative canvas, AI idea generation, live cursors, playback, and export
- Add PDF upload/extraction/ingestion pipeline with pgvector document search (RAG)
- Add document Q&A overlay with streaming chat and PDF preview
- Add note attachments UI with status polling, grid layout, and auto-scroll
- Add task extraction AI tool and agent executor improvements
- Fix NoteEmbedding missing updatedAt column, re-index 66 notes with 1536-dim embeddings
- Fix brainstorm 'Create Note' button: add success toast and redirect to created note
- Fix memory echo notification infinite polling
- Fix chat route to always include document_search tool
- Add brainstorm i18n keys across all 14 locales
- Add socket server for real-time brainstorm collaboration
- Add hierarchical notebook selector and organize notebook dialog improvements
- Add sidebar brainstorm section with session management
- Update prisma schema with brainstorm tables, attachments, and document chunks

memento-note/components/home-client.tsx

@@ -488,7 +488,7 @@ export function HomeClient({ initialNotes, initialSettings }: HomeClientProps) {
                     ))}
                   </div>
                 )}
-                <h1 className="font-memento-serif text-4xl font-medium tracking-tight text-foreground leading-tight pr-12">
+                <h1 className="font-memento-serif text-4xl font-medium tracking-tight text-foreground leading-tight pe-12">
                   {currentNotebook 
                     ? currentNotebook.name 
                     : searchParams.get('shared') === '1' 
@@ -600,10 +600,10 @@ export function HomeClient({ initialNotes, initialSettings }: HomeClientProps) {
                   <button
                     onClick={() => setOrganizeNotebookOpen(true)}
                     className="flex items-center gap-2 text-[13px] text-blueprint font-medium hover:opacity-70 transition-opacity"
-                    title="Organiser ce carnet avec l'IA"
+                    title={t('notebook.organizeNotebookWithAITooltip')}
                   >
                     <Sparkles size={16} />
-                    <span>Organiser</span>
+                    <span>{t('batch.organize')}</span>
                   </button>
                 )}
               </div>
@@ -616,7 +616,7 @@ export function HomeClient({ initialNotes, initialSettings }: HomeClientProps) {
                       "flex items-center gap-2 text-[13px] font-medium transition-opacity",
                       initialSettings.aiAssistantEnabled ? "text-foreground hover:opacity-70" : "text-muted-foreground opacity-50 cursor-not-allowed"
                     )}
-                    title={initialSettings.aiAssistantEnabled ? t('notebook.summary') : "Activez l'Assistant IA dans les paramètres pour résumer"}
+                    title={initialSettings.aiAssistantEnabled ? t('notebook.summary') : t('notebook.assistantRequiredForSummarize')}
                   >
                     <FileText size={16} />
                     <span>{t('notebook.summary') || 'Summarize'}</span>
@@ -701,7 +701,7 @@ export function HomeClient({ initialNotes, initialSettings }: HomeClientProps) {
                   {selectedTagIds.length > 0 && (
                     <button
                       onClick={() => setSelectedTagIds([])}
-                      className="px-3 py-1.5 text-[10px] font-bold uppercase tracking-wider text-red-500 hover:underline ml-auto"
+                      className="px-3 py-1.5 text-[10px] font-bold uppercase tracking-wider text-red-500 hover:underline ms-auto"
                     >
                       {t('labels.clearAll') || 'Clear all'}
                     </button>