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/note-editor/note-editor-toolbar.tsx

@@ -18,7 +18,7 @@ import { Badge } from '@/components/ui/badge'
 import {
   X, Plus, Palette, Image as ImageIcon, Bell, Eye, Link as LinkIcon, Sparkles,
   Maximize2, Copy, ArrowLeft, ChevronRight, PanelRight, Check, Loader2, Save, MoreHorizontal,
-  Trash2, LogOut, Wand2, Share2
+  Trash2, LogOut, Wand2, Share2, Wind, Paperclip
 } from 'lucide-react'
 import { NoteShareDialog } from './note-share-dialog'
 import { deleteNote, leaveSharedNote } from '@/app/actions/notes'
@@ -32,9 +32,11 @@ import { format } from 'date-fns'
 interface NoteEditorToolbarProps {
   mode: 'fullPage' | 'dialog'
   onClose: () => void
+  onToggleAttachments?: () => void
+  attachmentsCount?: number
 }
 
-export function NoteEditorToolbar({ mode, onClose }: NoteEditorToolbarProps) {
+export function NoteEditorToolbar({ mode, onClose, onToggleAttachments, attachmentsCount }: NoteEditorToolbarProps) {
   const { state, actions, note, readOnly, fullPage, notebooks, fileInputRef } = useNoteEditorContext()
   const { t } = useLanguage()
   const { refreshNotes } = useRefresh()
@@ -95,22 +97,22 @@ export function NoteEditorToolbar({ mode, onClose }: NoteEditorToolbarProps) {
           className="flex items-center gap-2 text-foreground hover:opacity-60 transition-opacity"
         >
           <ArrowLeft size={18} />
-          <span className="text-sm font-medium">Back to collection</span>
+          <span className="text-sm font-medium">{t('notes.backToCollection')}</span>
         </button>
 
         <div className="flex items-center gap-4">
           <span className="hidden sm:flex items-center gap-1.5 text-[11px] text-foreground/40 select-none">
             {state.isSaving
-              ? <><Loader2 className="h-3 w-3 animate-spin" /><span>Saving…</span></>
+              ? <><Loader2 className="h-3 w-3 animate-spin" /><span>{t('notes.saving')}</span></>
               : state.isDirty
-              ? <><span className="h-1.5 w-1.5 rounded-full bg-amber-400 inline-block" /><span>Modified</span></>
-              : <><Check className="h-3 w-3 text-emerald-500" /><span>Saved</span></>}
+              ? <><span className="h-1.5 w-1.5 rounded-full bg-amber-400 inline-block" /><span>{t('notes.dirtyStatus')}</span></>
+              : <><Check className="h-3 w-3 text-emerald-500" /><span>{t('notes.savedStatus')}</span></>}
           </span>
 
           {state.isMarkdown && !readOnly && (
             <button
-              title={state.showMarkdownPreview ? 'Revenir à l\'édition' : 'Aperçu'}
-              aria-label={state.showMarkdownPreview ? 'Revenir à l\'édition' : 'Prévisualiser le rendu'}
+              title={state.showMarkdownPreview ? t('notes.markdownEditingTitle') : t('notes.markdownPreviewTitle')}
+              aria-label={state.showMarkdownPreview ? t('notes.markdownEditingTitle') : t('notes.markdownPreviewTitle')}
               onClick={() => actions.setShowMarkdownPreview(!state.showMarkdownPreview)}
               className={cn(
                 'p-1.5 rounded-full border transition-all duration-300',
@@ -140,8 +142,8 @@ export function NoteEditorToolbar({ mode, onClose }: NoteEditorToolbarProps) {
           )}
 
           <button
-            title="AI Assistant"
-            aria-label="Ouvrir l'assistant IA"
+            title={t('ai.openAssistant')}
+            aria-label={t('ai.openAssistant')}
             onClick={() => { actions.setAiOpen(!state.aiOpen); actions.setInfoOpen(false) }}
             className={cn(
               'p-1.5 rounded-full border transition-all duration-300',
@@ -153,10 +155,41 @@ export function NoteEditorToolbar({ mode, onClose }: NoteEditorToolbarProps) {
             <Sparkles size={16} />
           </button>
 
+          <button
+            title={t('notes.brainstormThisIdea')}
+            aria-label={t('notes.brainstormThisIdeaAria')}
+            onClick={() => {
+              const title = note.title || ''
+              const summary = state.content?.replace(/<[^>]*>/g, '').slice(0, 200) || ''
+              const seed = title ? `${title}. ${summary}` : summary
+              if (!seed.trim()) return
+              window.open(`/brainstorm?seed=${encodeURIComponent(seed.slice(0, 300))}&sourceNoteId=${note.id}`, '_self')
+            }}
+            className="p-1.5 rounded-full border border-orange-300 dark:border-orange-700 text-orange-500 hover:bg-orange-50 dark:hover:bg-orange-900/20 transition-all"
+          >
+            <Wind size={16} />
+          </button>
+
+          {!readOnly && onToggleAttachments && (
+            <button
+              title={t('notes.attachments') || 'Attachments'}
+              aria-label={t('notes.attachments') || 'Attachments'}
+              onClick={onToggleAttachments}
+              className="relative p-1.5 rounded-full border border-black/20 dark:border-white/20 text-foreground hover:bg-black/5 dark:hover:bg-white/5 transition-all"
+            >
+              <Paperclip size={16} />
+              {(attachmentsCount ?? 0) > 0 && (
+                <span className="absolute -top-1 -right-1 w-3.5 h-3.5 bg-primary text-primary-foreground text-[8px] font-bold rounded-full flex items-center justify-center">
+                  {attachmentsCount}
+                </span>
+              )}
+            </button>
+          )}
+
           {!readOnly && (
             <button
-              title={state.isDirty ? 'Enregistrer' : 'Aucune modification'}
-              aria-label={state.isDirty ? 'Enregistrer la note' : 'Aucune modification à enregistrer'}
+              title={state.isDirty ? t('notes.saveNow') : t('notes.noModification')}
+              aria-label={state.isDirty ? t('notes.saveNoteAria') : t('notes.noChangesToSaveAria')}
               onClick={actions.handleSaveInPlace}
               disabled={state.isSaving || !state.isDirty}
               className={cn(
@@ -172,8 +205,8 @@ export function NoteEditorToolbar({ mode, onClose }: NoteEditorToolbarProps) {
 
           {!readOnly && (
             <button
-              title="Partager la note"
-              aria-label="Partager la note"
+              title={t('notes.shareNoteTitle')}
+              aria-label={t('notes.shareNoteAria')}
               onClick={() => setShareOpen(true)}
               className="p-1.5 rounded-full border border-black/20 dark:border-white/20 text-foreground hover:bg-black/5 dark:hover:bg-white/5 transition-all"
             >
@@ -184,7 +217,7 @@ export function NoteEditorToolbar({ mode, onClose }: NoteEditorToolbarProps) {
           {!readOnly && (
             <DropdownMenu>
               <DropdownMenuTrigger asChild>
-                <button aria-label="Menu des options" className="p-1.5 rounded-full border border-black/20 dark:border-white/20 text-foreground hover:bg-black/5 dark:hover:bg-white/5 transition-all">
+                <button aria-label={t('notes.optionsMenuAria')} className="p-1.5 rounded-full border border-black/20 dark:border-white/20 text-foreground hover:bg-black/5 dark:hover:bg-white/5 transition-all">
                   <MoreHorizontal size={16} />
                 </button>
               </DropdownMenuTrigger>
@@ -194,14 +227,14 @@ export function NoteEditorToolbar({ mode, onClose }: NoteEditorToolbarProps) {
                     try {
                       await deleteNote(note.id)
                       refreshNotes(note.notebookId)
-                      toast.success('Note supprimée.')
+                      toast.success(t('notes.noteDeletedToast'))
                       onClose()
-                    } catch { toast.error('Impossible de supprimer.') }
+                    } catch { toast.error(t('notes.deleteNoteFailedToast')) }
                   }}
                   className="text-red-600 dark:text-red-400 focus:text-red-600"
                 >
-                  <Trash2 className="h-4 w-4 mr-2" />
-                  Supprimer la note
+                  <Trash2 className="h-4 w-4 me-2" />
+                  {t('notes.deleteNoteConfirmItem')}
                 </DropdownMenuItem>
               </DropdownMenuContent>
             </DropdownMenu>
@@ -216,7 +249,7 @@ export function NoteEditorToolbar({ mode, onClose }: NoteEditorToolbarProps) {
           )}
 
           <button
-            aria-label="Informations du document"
+            aria-label={t('notes.documentInfoAria')}
             onClick={() => { actions.setInfoOpen(!state.infoOpen); actions.setAiOpen(false) }}
             className={cn(
               'p-1.5 rounded-full border transition-all duration-300',
@@ -259,11 +292,15 @@ export function NoteEditorToolbar({ mode, onClose }: NoteEditorToolbarProps) {
               </Button>
             )}
 
-            <Button variant="ghost" size="sm"
+            <Button
+              variant="ghost"
+              size="sm"
               className={cn('h-8 gap-1.5 px-2 text-xs font-medium transition-all duration-200 rounded-md', state.aiOpen && 'bg-primary/10 text-primary')}
-              onClick={() => actions.setAiOpen(!state.aiOpen)} title="IA Note">
+              onClick={() => actions.setAiOpen(!state.aiOpen)}
+              title={t('ai.aiNoteTitle')}
+            >
               <Sparkles className="h-3.5 w-3.5" />
-              <span className="hidden sm:inline">IA Note</span>
+              <span className="hidden sm:inline">{t('ai.aiNoteTitle')}</span>
             </Button>
 
             <DropdownMenu>
@@ -330,7 +367,7 @@ export function NoteEditorToolbar({ mode, onClose }: NoteEditorToolbarProps) {
               onClick={async () => {
                 try {
                   await leaveSharedNote(note.id)
-                  toast.success(t('notes.leftShare') || 'Share removed')
+                  toast.success(t('notes.leftShare'))
                   refreshNotes(note.notebookId)
                   onClose()
                 } catch {