diff --git a/memento-note/app/actions/notes.ts b/memento-note/app/actions/notes.ts
index 32f4f4e..a221394 100644
--- a/memento-note/app/actions/notes.ts
+++ b/memento-note/app/actions/notes.ts
@@ -8,6 +8,7 @@ import { getAIProvider } from '@/lib/ai/factory'
 import { parseNote, getHashColor } from '@/lib/utils'
 import { upsertNoteEmbedding } from '@/lib/embeddings'
 import { embeddingService } from '@/lib/ai/services/embedding.service'
+import { chunkIndexingService } from '@/lib/ai/services/chunk-indexing.service'
 import { syncNoteLinksForNote } from '@/lib/notes/sync-note-links'
 import { getSystemConfig, getConfigNumber, getConfigBoolean, SEARCH_DEFAULTS } from '@/lib/config'
 import { contextualAutoTagService } from '@/lib/ai/services/contextual-auto-tag.service'
@@ -458,6 +459,12 @@ export async function createNote(data: {
           console.error('[BG] Embedding generation failed:', e)
         }
 
+        try {
+          await chunkIndexingService.indexNote(noteId, data.title, content)
+        } catch (e) {
+          console.error('[BG] Chunk indexing failed:', e)
+        }
+
         // Background task 2: Auto-labeling (only if no user labels and has notebook)
         if (!hasUserLabels && notebookId) {
           try {
@@ -596,6 +603,12 @@ export async function updateNote(id: string, data: {
         } catch (e) {
           console.error('[BG] Embedding regeneration failed:', e);
         }
+
+        try {
+          await chunkIndexingService.indexNote(noteId, title, content);
+        } catch (e) {
+          console.error('[BG] Chunk indexing failed:', e);
+        }
       })();
     }
 
diff --git a/memento-note/app/api/clip/save/route.ts b/memento-note/app/api/clip/save/route.ts
index 7cf496d..c1b1858 100644
--- a/memento-note/app/api/clip/save/route.ts
+++ b/memento-note/app/api/clip/save/route.ts
@@ -6,6 +6,7 @@ import { createNotification } from '@/app/actions/notifications'
 import { buildClipSourceFooter, clipFooterLocaleTag } from '@/lib/clip/extract-article'
 import { resolveClipLocale, wrapClipArticleHtml, applyRtlToHtmlBlocks } from '@/lib/clip/rtl-content'
 import { embeddingService } from '@/lib/ai/services/embedding.service'
+import { chunkIndexingService } from '@/lib/ai/services/chunk-indexing.service'
 import { upsertNoteEmbedding } from '@/lib/embeddings'
 import DOMPurify from 'isomorphic-dompurify'
 
@@ -92,6 +93,8 @@ export async function POST(request: NextRequest) {
         if (embedding?.length) {
           await upsertNoteEmbedding(note.id, embedding)
         }
+
+        await chunkIndexingService.indexNote(note.id, title || domain, fullContent)
       } catch (error) {
         console.error('[clip/save] embedding generation failed:', error)
       }
diff --git a/memento-note/components/block-action-menu.tsx b/memento-note/components/block-action-menu.tsx
index 8856608..b0e2c0d 100644
--- a/memento-note/components/block-action-menu.tsx
+++ b/memento-note/components/block-action-menu.tsx
@@ -14,8 +14,10 @@ import {
   Heading1, Heading2, Heading3, List, ListOrdered,
   CheckSquare, Quote, CodeXml, Database,
   ArrowUp, ArrowDown, AlignLeft, ClipboardCopy, Sparkles,
+  ChevronsRightLeft,
 } from 'lucide-react'
 import { replaceBlockWithStructuredView } from '@/components/tiptap-structured-view-block-extension'
+import { insertToggleBlock, turnIntoToggleBlock } from '@/components/tiptap-toggle-extension'
 
 interface BlockActionMenuProps {
   editor: Editor
@@ -369,6 +371,14 @@ export function BlockActionMenu({
 
       <div className="block-action-separator" />
 
+      {/* Section repliable */}
+      <button type="button" className="block-action-item" onClick={() => { turnIntoToggleBlock(editor, blockPos, blockNode); onClose() }}>
+        <ChevronsRightLeft size={16} />
+        <span>{t('richTextEditor.blockActionInsertToggle')}</span>
+      </button>
+
+      <div className="block-action-separator" />
+
       {/* Création de diagramme */}
       <button type="button" className="block-action-item" onClick={() => { void handleCreateDiagram() }}>
         <Sparkles size={16} className="text-amber-500 transition-all duration-200" />
diff --git a/memento-note/components/rich-text-editor.tsx b/memento-note/components/rich-text-editor.tsx
index 52ba730..609f114 100644
--- a/memento-note/components/rich-text-editor.tsx
+++ b/memento-note/components/rich-text-editor.tsx
@@ -26,6 +26,7 @@ import { ChartSuggestionsDialog } from './chart-suggestions-dialog'
 import { UniqueIdExtension } from './tiptap-unique-id-extension'
 import { LiveBlockExtension } from './tiptap-live-block-extension'
 import { StructuredViewBlockExtension, insertStructuredViewBlockAtSelection } from './tiptap-structured-view-block-extension'
+import { ToggleExtension, insertToggleBlock } from './tiptap-toggle-extension'
 import { RtlPreserveExtension } from './tiptap-rtl-preserve-extension'
 import { ClipArticleExtension } from './tiptap-clip-article-extension'
 import { BlockPicker, type BlockSuggestion } from './block-picker'
@@ -61,7 +62,8 @@ import {
   Sparkles, Wand2, Scissors, Lightbulb, X, Check, ExternalLink,
   FileText, Pilcrow, MessageSquare, AlignLeft, AlignCenter, AlignRight,
   Superscript as SuperscriptIcon, Subscript as SubscriptIcon, Expand, Plus,
-  SpellCheck, Languages, BookOpen, Presentation, BarChart3, Database
+  SpellCheck, Languages, BookOpen, Presentation, BarChart3, Database,
+  ChevronsRightLeft
 } from 'lucide-react'
 import { cn } from '@/lib/utils'
 import { toast } from 'sonner'
@@ -202,6 +204,10 @@ const slashCommands: SlashItem[] = [
     title: 'Database', description: 'Inline database', icon: Database, category: 'Basic blocks', shortcut: '/database',
     command: (e) => { insertStructuredViewBlockAtSelection(e) },
   },
+  {
+    title: 'Toggle', description: 'Collapsible section', icon: ChevronsRightLeft, category: 'Basic blocks', shortcut: '>',
+    command: (e) => { insertToggleBlock(e) },
+  },
 ]
 
 async function aiReformulate(text: string, option: string, t: any, language?: string): Promise<string> {
@@ -423,6 +429,7 @@ export const RichTextEditor = forwardRef<RichTextEditorHandle, RichTextEditorPro
         UndoRedoFeedbackExtension,
         LiveBlockExtension,
         StructuredViewBlockExtension,
+        ToggleExtension,
         ClipArticleExtension,
         RtlPreserveExtension,
         Placeholder.configure({
@@ -1592,6 +1599,7 @@ function SlashCommandMenu({ editor, onInsertImage, onSuggestCharts }: { editor:
     { ...slashCommands[28], title: 'Suggest Charts', description: 'AI suggère des graphiques basés sur votre contenu', categoryId: 'ai' },
     { ...slashCommands[29], title: 'Living Block', description: 'Insérer un bloc vivant depuis une autre note', categoryId: 'embed' },
     { ...slashCommands[30], title: t('richTextEditor.slashDatabase'), description: t('richTextEditor.slashDatabaseDesc'), categoryId: 'data', slashKeywords: ['database', 'db', 'base', 'données', 'donnees', 'vue', 'tableau', 'structured', 'structuree', 'structurée'] },
+    { ...slashCommands[31], title: t('richTextEditor.slashToggle'), description: t('richTextEditor.slashToggleDesc'), categoryId: 'text', slashKeywords: ['toggle', 'accordion', 'replier', 'deroulant', 'déroulant', 'section'] },
     {
       title: t('richTextEditor.slashNoteLink'),
       description: t('richTextEditor.slashNoteLinkDesc'),
diff --git a/memento-note/components/tiptap-toggle-extension.tsx b/memento-note/components/tiptap-toggle-extension.tsx
new file mode 100644
index 0000000..d5ab02a
--- /dev/null
+++ b/memento-note/components/tiptap-toggle-extension.tsx
@@ -0,0 +1,170 @@
+'use client'
+
+import { Node, mergeAttributes } from '@tiptap/core'
+import { ReactNodeViewRenderer, NodeViewWrapper, NodeViewContent } from '@tiptap/react'
+import { ChevronRight, X, Trash2 } from 'lucide-react'
+import { useState } from 'react'
+import { cn } from '@/lib/utils'
+import { useLanguage } from '@/lib/i18n'
+
+const ToggleView = ({ node, updateAttributes, deleteNode, getPos, editor }: any) => {
+  const [opened, setOpened] = useState(node.attrs.opened !== false)
+  const { t } = useLanguage()
+
+  const toggle = () => {
+    const next = !opened
+    setOpened(next)
+    updateAttributes({ opened: next })
+  }
+
+  const unwrap = () => {
+    const pos = getPos()
+    if (typeof pos !== 'number') return
+    const { state, view } = editor
+    const toggleNode = state.doc.nodeAt(pos)
+    if (!toggleNode) return
+    const children: any[] = []
+    toggleNode.forEach((child: any) => {
+      children.push(child.toJSON())
+    })
+    if (children.length === 0) children.push({ type: 'paragraph' })
+    editor.chain().focus().deleteRange({ from: pos, to: pos + toggleNode.nodeSize }).run()
+    editor.chain().focus().insertContentAt(pos, children).run()
+  }
+
+  return (
+    <NodeViewWrapper className="toggle-block my-1 rounded-lg border border-border/50 bg-muted/20" dir="auto">
+      <div className="flex items-center gap-1.5 px-2 py-1.5 border-b border-border/30">
+        <button
+          onClick={toggle}
+          contentEditable={false}
+          className="flex-shrink-0 p-0.5 rounded hover:bg-muted"
+          style={{
+            transform: opened ? 'rotate(90deg)' : 'rotate(0deg)',
+            transition: 'transform 150ms ease',
+          }}
+        >
+          <ChevronRight className="h-4 w-4 text-muted-foreground" />
+        </button>
+        <span
+          className="text-xs font-medium text-muted-foreground flex-1 cursor-pointer"
+          onClick={toggle}
+          contentEditable={false}
+        >
+          {opened ? t('richTextEditor.toggleOpened') : t('richTextEditor.toggleClosed')}
+        </span>
+        <button
+          onClick={unwrap}
+          contentEditable={false}
+          className="flex-shrink-0 p-0.5 rounded hover:bg-muted text-muted-foreground"
+          title={t('richTextEditor.toggleUnwrap')}
+        >
+          <X className="h-3.5 w-3.5" />
+        </button>
+        <button
+          onClick={deleteNode}
+          contentEditable={false}
+          className="flex-shrink-0 p-0.5 rounded hover:bg-destructive/10 text-muted-foreground hover:text-destructive"
+          title={t('richTextEditor.toggleDelete')}
+        >
+          <Trash2 className="h-3.5 w-3.5" />
+        </button>
+      </div>
+
+      <div className={cn('px-3 py-2', !opened && 'hidden')}>
+        <NodeViewContent className="toggle-content space-y-1" />
+      </div>
+    </NodeViewWrapper>
+  )
+}
+
+export const ToggleExtension = Node.create({
+  name: 'toggleBlock',
+
+  group: 'block',
+
+  content: 'block+',
+
+  defining: true,
+
+  addAttributes() {
+    return {
+      opened: {
+        default: true,
+        parseHTML: (element) => element.getAttribute('data-opened') !== 'false',
+        renderHTML: (attributes) => ({
+          'data-opened': attributes.opened,
+        }),
+      },
+    }
+  },
+
+  parseHTML() {
+    return [
+      {
+        tag: 'div[data-type="toggle-block"]',
+      },
+      {
+        tag: 'details',
+        getAttrs: (element) => {
+          if (typeof element === 'string') return false
+          return { opened: !(element as HTMLElement).hasAttribute('closed') }
+        },
+      },
+    ]
+  },
+
+  renderHTML({ HTMLAttributes }) {
+    return [
+      'div',
+      mergeAttributes(HTMLAttributes, {
+        'data-type': 'toggle-block',
+        class: 'toggle-block',
+      }),
+      0,
+    ]
+  },
+
+  addNodeView() {
+    return ReactNodeViewRenderer(ToggleView)
+  },
+
+  addKeyboardShortcuts() {
+    return {
+      'Mod-Shift-T': () => this.editor.commands.insertContent({
+        type: this.name,
+        attrs: { opened: true },
+        content: [{ type: 'paragraph' }],
+      }),
+    }
+  },
+})
+
+export function insertToggleBlock(editor: any) {
+  editor.chain().focus().insertContent({
+    type: 'toggleBlock',
+    attrs: { opened: true },
+    content: [
+      { type: 'paragraph' },
+    ],
+  }).run()
+}
+
+/**
+ * Transforme un bloc existant en section repliable.
+ * Le contenu du bloc original est déplacé dans le toggle.
+ */
+export function turnIntoToggleBlock(editor: any, blockPos: number, blockNode: any) {
+  if (!blockNode || blockPos < 0) return
+
+  const nodeJson = blockNode.toJSON()
+
+  editor.chain().focus().deleteRange({
+    from: blockPos,
+    to: blockPos + blockNode.nodeSize,
+  }).insertContentAt(blockPos, {
+    type: 'toggleBlock',
+    attrs: { opened: true },
+    content: [nodeJson],
+  }).setTextSelection(blockPos + 2).run()
+}
diff --git a/memento-note/locales/en.json b/memento-note/locales/en.json
index 02e68c6..db974e9 100644
--- a/memento-note/locales/en.json
+++ b/memento-note/locales/en.json
@@ -2407,6 +2407,13 @@
     "slashTableDesc": "Insert a simple grid",
     "slashDatabase": "Structured View",
     "slashDatabaseDesc": "Embed your notebook's structured data",
+    "slashToggle": "Toggle Section",
+    "slashToggleDesc": "Create a collapsible section",
+    "toggleOpened": "Expanded section — click to collapse",
+    "toggleClosed": "Collapsed section — click to expand",
+    "toggleDelete": "Delete section",
+    "toggleUnwrap": "Disable toggle section",
+    "blockActionInsertToggle": "Turn into toggle section",
     "slashDiagram": "Diagram",
     "slashDiagramDesc": "Generate a flow or mindmap",
     "slashSlides": "Presentation",
diff --git a/memento-note/locales/fr.json b/memento-note/locales/fr.json
index 0cf8074..940004f 100644
--- a/memento-note/locales/fr.json
+++ b/memento-note/locales/fr.json
@@ -2411,6 +2411,13 @@
     "slashTableDesc": "Insérer un tableau simple",
     "slashDatabase": "Vue structurée",
     "slashDatabaseDesc": "Intégrer les données structurées de votre carnet",
+    "slashToggle": "Section repliable",
+    "slashToggleDesc": "Créer une section dépliable",
+    "toggleOpened": "Section dépliée — cliquer pour replier",
+    "toggleClosed": "Section repliée — cliquer pour déplier",
+    "toggleDelete": "Supprimer la section",
+    "toggleUnwrap": "Désactiver la section repliable",
+    "blockActionInsertToggle": "Transformer en section repliable",
     "slashDiagram": "Diagramme",
     "slashDiagramDesc": "Générer un flux ou une carte mentale",
     "slashSlides": "Présentation",