feat: add notes feature and keyboard shortcuts

- Introduced a new Note model in the Prisma schema to support note-taking functionality.
- Updated the HeaderNavigation component to include a link to the new Notes page.
- Implemented keyboard shortcuts for note actions, enhancing user experience and productivity.
- Added dependencies for markdown rendering and formatting tools to support note content.

.husky/pre-commit

@@ -0,0 +1,3 @@
+#!/bin/sh
+export PATH="$PWD/node_modules/.bin:$PATH"
+lint-staged

package.json

@@ -19,7 +19,10 @@
     "cache:cleanup": "npx tsx scripts/cache-monitor.ts cleanup",
     "cache:clear": "npx tsx scripts/cache-monitor.ts clear",
     "test:story-points": "npx tsx scripts/test-story-points.ts",
-    "test:jira-fields": "npx tsx scripts/test-jira-fields.ts"
+    "test:jira-fields": "npx tsx scripts/test-jira-fields.ts",
+    "prettier:format": "prettier --write .",
+    "prettier:check": "prettier --check .",
+    "prepare": "husky"
   },
   "dependencies": {
     "@dnd-kit/core": "^6.3.1",
@@ -39,7 +42,11 @@
     "prisma": "^6.16.1",
     "react": "19.1.0",
     "react-dom": "19.1.0",
+    "react-markdown": "^10.1.0",
     "recharts": "^3.2.1",
+    "rehype-highlight": "^7.0.2",
+    "rehype-sanitize": "^6.0.0",
+    "remark-gfm": "^4.0.1",
     "tailwind-merge": "^3.3.1",
     "twemoji": "^14.0.2"
   },
@@ -52,8 +59,16 @@
     "@types/react-dom": "^19",
     "eslint": "^9",
     "eslint-config-next": "^15.5.3",
+    "husky": "^9.1.7",
     "knip": "^5.64.0",
+    "lint-staged": "^15.5.2",
+    "prettier": "^3.6.2",
     "tsx": "^4.19.2",
     "typescript": "^5"
+  },
+  "lint-staged": {
+    "*.{js,jsx,ts,tsx,json,css,md}": [
+      "prettier --write"
+    ]
   }
 }

prisma/schema.prisma

@@ -21,6 +21,7 @@ model User {
   createdAt   DateTime @default(now())
   updatedAt   DateTime @updatedAt
   preferences UserPreferences?
+  notes       Note[]
 
   @@map("users")
 }
@@ -62,6 +63,7 @@ model Tag {
   isPinned     Boolean   @default(false)
   taskTags     TaskTag[]
   primaryTasks Task[]    @relation("PrimaryTag")
+  noteTags     NoteTag[]
 
   @@map("tags")
 }
@@ -121,3 +123,24 @@ model UserPreferences {
 
   @@map("user_preferences")
 }
+
+model Note {
+  id        String   @id @default(cuid())
+  title     String
+  content   String   // Markdown content
+  userId    String
+  createdAt DateTime @default(now())
+  updatedAt DateTime @updatedAt
+  user      User     @relation(fields: [userId], references: [id], onDelete: Cascade)
+  noteTags  NoteTag[]
+}
+
+model NoteTag {
+  noteId String
+  tagId  String
+  tag    Tag    @relation(fields: [tagId], references: [id], onDelete: Cascade)
+  note   Note   @relation(fields: [noteId], references: [id], onDelete: Cascade)
+
+  @@id([noteId, tagId])
+  @@map("note_tags")
+}

src/app/api/notes/[id]/route.ts

@@ -0,0 +1,115 @@
+import { NextResponse } from 'next/server';
+import { notesService } from '@/services/notes';
+import { getServerSession } from 'next-auth';
+import { authOptions } from '@/lib/auth';
+
+/**
+ * API route pour récupérer une note spécifique
+ */
+export async function GET(
+  request: Request,
+  { params }: { params: Promise<{ id: string }> }
+) {
+  try {
+    const session = await getServerSession(authOptions);
+
+    if (!session?.user?.id) {
+      return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
+    }
+
+    const resolvedParams = await params;
+    const note = await notesService.getNoteById(
+      resolvedParams.id,
+      session.user.id
+    );
+
+    if (!note) {
+      return NextResponse.json({ error: 'Note not found' }, { status: 404 });
+    }
+
+    return NextResponse.json({ note });
+  } catch (error) {
+    console.error('Error fetching note:', error);
+    return NextResponse.json(
+      { error: 'Failed to fetch note' },
+      { status: 500 }
+    );
+  }
+}
+
+/**
+ * API route pour mettre à jour une note
+ */
+export async function PUT(
+  request: Request,
+  { params }: { params: Promise<{ id: string }> }
+) {
+  try {
+    const session = await getServerSession(authOptions);
+
+    if (!session?.user?.id) {
+      return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
+    }
+
+    const body = await request.json();
+    const { title, content, tags } = body;
+
+    const resolvedParams = await params;
+    const note = await notesService.updateNote(
+      resolvedParams.id,
+      session.user.id,
+      {
+        title,
+        content,
+        tags,
+      }
+    );
+
+    return NextResponse.json({ note });
+  } catch (error) {
+    console.error('Error updating note:', error);
+    if (
+      error instanceof Error &&
+      error.message === 'Note not found or access denied'
+    ) {
+      return NextResponse.json({ error: 'Note not found' }, { status: 404 });
+    }
+    return NextResponse.json(
+      { error: 'Failed to update note' },
+      { status: 500 }
+    );
+  }
+}
+
+/**
+ * API route pour supprimer une note
+ */
+export async function DELETE(
+  request: Request,
+  { params }: { params: Promise<{ id: string }> }
+) {
+  try {
+    const session = await getServerSession(authOptions);
+
+    if (!session?.user?.id) {
+      return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
+    }
+
+    const resolvedParams = await params;
+    await notesService.deleteNote(resolvedParams.id, session.user.id);
+
+    return NextResponse.json({ success: true });
+  } catch (error) {
+    console.error('Error deleting note:', error);
+    if (
+      error instanceof Error &&
+      error.message === 'Note not found or access denied'
+    ) {
+      return NextResponse.json({ error: 'Note not found' }, { status: 404 });
+    }
+    return NextResponse.json(
+      { error: 'Failed to delete note' },
+      { status: 500 }
+    );
+  }
+}

src/app/api/notes/route.ts

@@ -0,0 +1,73 @@
+import { NextResponse } from 'next/server';
+import { notesService } from '@/services/notes';
+import { getServerSession } from 'next-auth';
+import { authOptions } from '@/lib/auth';
+
+/**
+ * API route pour récupérer toutes les notes de l'utilisateur connecté
+ */
+export async function GET(request: Request) {
+  try {
+    const session = await getServerSession(authOptions);
+
+    if (!session?.user?.id) {
+      return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
+    }
+
+    const { searchParams } = new URL(request.url);
+    const search = searchParams.get('search');
+
+    let notes;
+    if (search) {
+      notes = await notesService.searchNotes(session.user.id, search);
+    } else {
+      notes = await notesService.getNotes(session.user.id);
+    }
+
+    return NextResponse.json({ notes });
+  } catch (error) {
+    console.error('Error fetching notes:', error);
+    return NextResponse.json(
+      { error: 'Failed to fetch notes' },
+      { status: 500 }
+    );
+  }
+}
+
+/**
+ * API route pour créer une nouvelle note
+ */
+export async function POST(request: Request) {
+  try {
+    const session = await getServerSession(authOptions);
+
+    if (!session?.user?.id) {
+      return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
+    }
+
+    const body = await request.json();
+    const { title, content, tags } = body;
+
+    if (!title || !content) {
+      return NextResponse.json(
+        { error: 'Title and content are required' },
+        { status: 400 }
+      );
+    }
+
+    const note = await notesService.createNote({
+      title,
+      content,
+      userId: session.user.id,
+      tags,
+    });
+
+    return NextResponse.json({ note }, { status: 201 });
+  } catch (error) {
+    console.error('Error creating note:', error);
+    return NextResponse.json(
+      { error: 'Failed to create note' },
+      { status: 500 }
+    );
+  }
+}

src/app/notes/NotesPageClient.tsx

@@ -0,0 +1,289 @@
+'use client';
+
+import { useState, useEffect, useCallback } from 'react';
+import { Note } from '@/services/notes';
+import { notesClient } from '@/clients/notes';
+import { NotesList } from '@/components/notes/NotesList';
+import { MarkdownEditor } from '@/components/notes/MarkdownEditor';
+import { Header } from '@/components/ui/Header';
+import { TasksProvider, useTasksContext } from '@/contexts/TasksContext';
+import { Tag } from '@/lib/types';
+import { FileText, AlertCircle, ChevronLeft, ChevronRight } from 'lucide-react';
+
+interface NotesPageClientProps {
+  initialNotes: Note[];
+  initialTags: (Tag & { usage: number })[];
+}
+
+function NotesPageContent({ initialNotes }: { initialNotes: Note[] }) {
+  const [notes, setNotes] = useState<Note[]>(initialNotes);
+  const [selectedNote, setSelectedNote] = useState<Note | null>(null);
+  const { tags: availableTags } = useTasksContext();
+  const [error, setError] = useState<string | null>(null);
+  const [hasUnsavedChanges, setHasUnsavedChanges] = useState(false);
+  const [sidebarCollapsed, setSidebarCollapsed] = useState(false);
+
+  // Select first note if none selected
+  useEffect(() => {
+    if (notes.length > 0 && !selectedNote) {
+      setSelectedNote(notes[0]);
+    }
+  }, [notes, selectedNote]);
+
+  const handleSelectNote = useCallback(
+    (note: Note) => {
+      // Check for unsaved changes before switching
+      if (hasUnsavedChanges && selectedNote) {
+        const shouldSwitch = window.confirm(
+          'Vous avez des modifications non sauvegardées. Voulez-vous continuer sans sauvegarder ?'
+        );
+        if (!shouldSwitch) return;
+      }
+
+      setSelectedNote(note);
+      setHasUnsavedChanges(false);
+    },
+    [hasUnsavedChanges, selectedNote]
+  );
+
+  const handleCreateNote = useCallback(async () => {
+    try {
+      const newNote = await notesClient.createNote({
+        title: 'Nouvelle note',
+        content: '# Nouvelle note\n\nCommencez à écrire...',
+      });
+
+      setNotes((prev) => [newNote, ...prev]);
+      setSelectedNote(newNote);
+      setHasUnsavedChanges(false);
+    } catch (err) {
+      setError('Erreur lors de la création de la note');
+      console.error('Error creating note:', err);
+    }
+  }, []);
+
+  const handleDeleteNote = useCallback(
+    async (noteId: string) => {
+      try {
+        await notesClient.deleteNote(noteId);
+        setNotes((prev) => prev.filter((note) => note.id !== noteId));
+
+        // If deleted note was selected, select another one
+        if (selectedNote?.id === noteId) {
+          const remainingNotes = notes.filter((note) => note.id !== noteId);
+          setSelectedNote(remainingNotes.length > 0 ? remainingNotes[0] : null);
+        }
+      } catch (err) {
+        setError('Erreur lors de la suppression de la note');
+        console.error('Error deleting note:', err);
+      }
+    },
+    [selectedNote, notes]
+  );
+
+  const getNoteTitle = (content: string): string => {
+    // Extract title from first line, removing markdown headers
+    const firstLine = content.split('\n')[0] || '';
+    const title = firstLine
+      .replace(/^#{1,6}\s+/, '') // Remove markdown headers
+      .replace(/\*\*(.*?)\*\*/g, '$1') // Remove bold
+      .replace(/\*(.*?)\*/g, '$1') // Remove italic
+      .replace(/`(.*?)`/g, '$1') // Remove inline code
+      .trim();
+
+    return title || 'Note sans titre';
+  };
+
+  const handleContentChange = useCallback(
+    (content: string) => {
+      if (selectedNote) {
+        setSelectedNote((prev) => (prev ? { ...prev, content } : null));
+        setHasUnsavedChanges(true);
+      }
+    },
+    [selectedNote]
+  );
+
+  const handleSave = useCallback(async () => {
+    if (!selectedNote) return;
+
+    try {
+      // setIsSaving(true);
+      setError(null);
+
+      const updatedNote = await notesClient.updateNote(selectedNote.id, {
+        content: selectedNote.content,
+        tags: selectedNote.tags,
+      });
+
+      // Mettre à jour la liste des notes mais pas selectedNote pour éviter la perte de focus
+      setNotes((prev) =>
+        prev.map((note) => (note.id === selectedNote.id ? updatedNote : note))
+      );
+
+      setHasUnsavedChanges(false);
+    } catch (err) {
+      setError('Erreur lors de la sauvegarde');
+      console.error('Error saving note:', err);
+    } finally {
+      // setIsSaving(false);
+    }
+  }, [selectedNote]);
+
+  const handleTagsChange = useCallback(
+    (tags: string[]) => {
+      if (!selectedNote) return;
+
+      setSelectedNote((prev) => (prev ? { ...prev, tags } : null));
+      setHasUnsavedChanges(true);
+    },
+    [selectedNote]
+  );
+
+  // Auto-save quand les tags changent
+  useEffect(() => {
+    if (hasUnsavedChanges && selectedNote) {
+      const timeoutId = setTimeout(() => {
+        handleSave();
+      }, 1000); // Sauvegarder après 1 seconde d'inactivité
+
+      return () => clearTimeout(timeoutId);
+    }
+  }, [selectedNote, hasUnsavedChanges, handleSave]);
+
+  return (
+    <div className="h-screen bg-[var(--background)] flex flex-col">
+      <Header title="Notes" subtitle="Gestionnaire de notes markdown" />
+
+      <div className="flex-1 container mx-auto px-4 py-4">
+        <div className="flex h-full bg-[var(--card)]/40 border border-[var(--border)]/60 backdrop-blur-md shadow-xl shadow-[var(--card-shadow-medium)] rounded-lg overflow-hidden relative before:absolute before:inset-0 before:rounded-lg before:bg-gradient-to-br before:from-[color-mix(in_srgb,var(--primary)_12%,transparent)] before:via-[color-mix(in_srgb,var(--primary)_6%,transparent)] before:to-transparent before:opacity-90 before:pointer-events-none">
+          {/* Notes List Sidebar */}
+          <div
+            className={`${sidebarCollapsed ? 'w-12' : 'w-80'} flex-shrink-0 border-r border-[var(--border)] transition-all duration-300 ease-in-out`}
+          >
+            {sidebarCollapsed ? (
+              <div className="h-full flex flex-col items-center py-4">
+                <button
+                  onClick={() => setSidebarCollapsed(false)}
+                  className="p-2 rounded-lg bg-[var(--card)]/60 hover:bg-[var(--card)]/80 backdrop-blur-sm text-[var(--foreground)] border border-[var(--border)]/40 hover:border-[var(--border)]/60 transition-all duration-200 shadow-sm hover:shadow-md"
+                >
+                  <ChevronRight className="w-4 h-4" />
+                </button>
+                <div className="mt-4 text-xs text-[var(--muted-foreground)] font-mono writing-mode-vertical-rl text-orientation-mixed">
+                  NOTES
+                </div>
+              </div>
+            ) : (
+              <>
+                <div className="flex items-center justify-between p-3 border-b border-[var(--border)]/60 bg-[var(--card)]/40 backdrop-blur-md">
+                  <h2 className="text-sm font-mono font-semibold text-[var(--foreground)] uppercase tracking-wider">
+                    Notes
+                  </h2>
+                  <button
+                    onClick={() => setSidebarCollapsed(true)}
+                    className="p-1 rounded-lg bg-[var(--card)]/60 hover:bg-[var(--card)]/80 backdrop-blur-sm text-[var(--foreground)] border border-[var(--border)]/40 hover:border-[var(--border)]/60 transition-all duration-200 shadow-sm hover:shadow-md"
+                  >
+                    <ChevronLeft className="w-3 h-3" />
+                  </button>
+                </div>
+                <NotesList
+                  notes={notes}
+                  onSelectNote={handleSelectNote}
+                  onCreateNote={handleCreateNote}
+                  onDeleteNote={handleDeleteNote}
+                  selectedNoteId={selectedNote?.id}
+                  isLoading={false}
+                  availableTags={availableTags}
+                />
+              </>
+            )}
+          </div>
+
+          {/* Main Editor Area */}
+          <div className="flex-1 flex flex-col min-h-0">
+            {error && (
+              <div className="flex items-center gap-2 p-3 bg-[var(--destructive)]/10 border-b border-[var(--destructive)]/20 text-[var(--destructive)]">
+                <AlertCircle className="w-4 h-4" />
+                <span className="text-sm">{error}</span>
+                <button
+                  onClick={() => setError(null)}
+                  className="ml-auto text-xs underline hover:no-underline"
+                >
+                  Fermer
+                </button>
+              </div>
+            )}
+
+            {selectedNote ? (
+              <>
+                {/* Note Header */}
+                <div className="flex items-center gap-4 p-4 border-b border-[var(--border)]/60 bg-[var(--card)]/40 backdrop-blur-md relative before:absolute before:inset-0 before:bg-gradient-to-r before:from-[color-mix(in_srgb,var(--primary)_8%,transparent)] before:via-[color-mix(in_srgb,var(--primary)_4%,transparent)] before:to-transparent before:opacity-80 before:pointer-events-none">
+                  <FileText className="w-5 h-5 text-[var(--muted-foreground)]" />
+                  <div className="flex-1">
+                    <h2 className="text-lg font-semibold text-[var(--foreground)] truncate">
+                      {getNoteTitle(selectedNote.content)}
+                    </h2>
+                  </div>
+                  <div className="flex items-center gap-2 text-sm text-[var(--muted-foreground)]">
+                    {hasUnsavedChanges && (
+                      <span className="text-[var(--accent)]">
+                        Non sauvegardé
+                      </span>
+                    )}
+                    <span>
+                      Modifié{' '}
+                      {new Date(selectedNote.updatedAt).toLocaleDateString(
+                        'fr-FR'
+                      )}
+                    </span>
+                  </div>
+                </div>
+
+                {/* Editor */}
+                <div className="flex-1 min-h-0">
+                  <MarkdownEditor
+                    value={selectedNote.content}
+                    onChange={handleContentChange}
+                    autoSave={true}
+                    onSave={handleSave}
+                    tags={selectedNote.tags}
+                    onTagsChange={handleTagsChange}
+                    availableTags={availableTags}
+                    onCreateNote={handleCreateNote}
+                    onToggleSidebar={() =>
+                      setSidebarCollapsed(!sidebarCollapsed)
+                    }
+                    className="h-full"
+                  />
+                </div>
+              </>
+            ) : (
+              <div className="flex-1 flex items-center justify-center text-[var(--muted-foreground)]">
+                <div className="text-center">
+                  <FileText className="w-16 h-16 mx-auto mb-4 opacity-50" />
+                  <h3 className="text-lg font-medium mb-2">
+                    Aucune note sélectionnée
+                  </h3>
+                  <p className="text-sm">
+                    Sélectionnez une note dans la liste ou créez-en une nouvelle
+                  </p>
+                </div>
+              </div>
+            )}
+          </div>
+        </div>
+      </div>
+    </div>
+  );
+}
+
+export function NotesPageClient({
+  initialNotes,
+  initialTags,
+}: NotesPageClientProps) {
+  return (
+    <TasksProvider initialTasks={[]} initialTags={initialTags}>
+      <NotesPageContent initialNotes={initialNotes} />
+    </TasksProvider>
+  );
+}

src/app/notes/page.tsx

@@ -0,0 +1,41 @@
+import { Metadata } from 'next';
+import { NotesPageClient } from './NotesPageClient';
+import { notesService } from '@/services/notes';
+import { tagsService } from '@/services/task-management/tags';
+import { getServerSession } from 'next-auth';
+import { authOptions } from '@/lib/auth';
+
+// Force dynamic rendering (no static generation)
+export const dynamic = 'force-dynamic';
+
+export const metadata: Metadata = {
+  title: 'Notes - Tower Control',
+  description: 'Gestionnaire de notes markdown',
+};
+
+export default async function NotesPage() {
+  const session = await getServerSession(authOptions);
+
+  if (!session?.user?.id) {
+    return (
+      <div className="min-h-screen bg-[var(--background)] flex items-center justify-center">
+        <div className="text-center">
+          <h1 className="text-2xl font-bold text-[var(--foreground)] mb-4">
+            Non autorisé
+          </h1>
+          <p className="text-[var(--muted-foreground)]">
+            Vous devez être connecté pour accéder aux notes.
+          </p>
+        </div>
+      </div>
+    );
+  }
+
+  // SSR - Récupération des données côté serveur
+  const initialNotes = await notesService.getNotes(session.user.id);
+  const initialTags = await tagsService.getTags();
+
+  return (
+    <NotesPageClient initialNotes={initialNotes} initialTags={initialTags} />
+  );
+}

src/clients/notes.ts

@@ -0,0 +1,95 @@
+import { HttpClient } from '@/clients/base/http-client';
+import { Note } from '@/services/notes';
+
+export interface CreateNoteData {
+  title: string;
+  content: string;
+  tags?: string[];
+}
+
+export interface UpdateNoteData {
+  title?: string;
+  content?: string;
+  tags?: string[];
+}
+
+export interface NotesResponse {
+  notes: Note[];
+}
+
+export interface NoteResponse {
+  note: Note;
+}
+
+export interface NotesStatsResponse {
+  totalNotes: number;
+  totalWords: number;
+  lastUpdated: Date | null;
+}
+
+/**
+ * Client HTTP pour les notes
+ */
+export class NotesClient extends HttpClient {
+  constructor() {
+    super('/api/notes');
+  }
+
+  /**
+   * Récupère toutes les notes de l'utilisateur
+   */
+  async getNotes(search?: string): Promise<Note[]> {
+    const params = search ? { search } : undefined;
+    const response = await this.get<NotesResponse>('', params);
+    return response.notes;
+  }
+
+  /**
+   * Récupère une note par son ID
+   */
+  async getNoteById(id: string): Promise<Note> {
+    const response = await this.get<NoteResponse>(`/${id}`);
+    return response.note;
+  }
+
+  /**
+   * Crée une nouvelle note
+   */
+  async createNote(data: CreateNoteData): Promise<Note> {
+    const response = await this.post<NoteResponse>('', data);
+    return response.note;
+  }
+
+  /**
+   * Met à jour une note existante
+   */
+  async updateNote(id: string, data: UpdateNoteData): Promise<Note> {
+    const response = await this.put<NoteResponse>(`/${id}`, data);
+    return response.note;
+  }
+
+  /**
+   * Supprime une note
+   */
+  async deleteNote(id: string): Promise<void> {
+    await this.delete(`/${id}`);
+  }
+
+  /**
+   * Recherche des notes
+   */
+  async searchNotes(query: string): Promise<Note[]> {
+    const response = await this.get<NotesResponse>('', { search: query });
+    return response.notes;
+  }
+
+  /**
+   * Récupère les statistiques des notes
+   */
+  async getNotesStats(): Promise<NotesStatsResponse> {
+    return await this.get<NotesStatsResponse>('/stats');
+  }
+}
+
+// Instance singleton
+export const notesClient = new NotesClient();

src/components/notes/MarkdownEditor.tsx

@@ -0,0 +1,710 @@
+'use client';
+
+import { useState, useEffect, useCallback, useRef } from 'react';
+import ReactMarkdown from 'react-markdown';
+import remarkGfm from 'remark-gfm';
+import rehypeHighlight from 'rehype-highlight';
+import rehypeSanitize from 'rehype-sanitize';
+import { Eye, EyeOff, Edit3, X } from 'lucide-react';
+import { TagInput } from '@/components/ui/TagInput';
+import { TagDisplay } from '@/components/ui/TagDisplay';
+import { Tag } from '@/lib/types';
+
+interface MarkdownEditorProps {
+  value: string;
+  onChange: (value: string) => void;
+  placeholder?: string;
+  className?: string;
+  autoSave?: boolean;
+  onSave?: () => void;
+  tags?: string[];
+  onTagsChange?: (tags: string[]) => void;
+  availableTags?: Tag[];
+  onCreateNote?: () => void;
+  onToggleSidebar?: () => void;
+}
+
+export function MarkdownEditor({
+  value,
+  onChange,
+  placeholder = 'Commencez à écrire votre note en markdown...',
+  className = '',
+  autoSave = false,
+  onSave,
+  tags = [],
+  onTagsChange,
+  availableTags = [],
+  onCreateNote,
+  onToggleSidebar,
+}: MarkdownEditorProps) {
+  const [showPreview, setShowPreview] = useState(true); // Aperçu par défaut
+  const [isEditing, setIsEditing] = useState(false); // Mode édition
+  const [hasUnsavedChanges, setHasUnsavedChanges] = useState(false);
+  const autoSaveTimeoutRef = useRef<NodeJS.Timeout | null>(null);
+  const lastSavedValueRef = useRef(value);
+  const textareaRef = useRef<HTMLTextAreaElement>(null);
+
+  // Historique pour undo/redo
+  const [history, setHistory] = useState<string[]>([value]);
+  const [historyIndex, setHistoryIndex] = useState(0);
+
+  // Fonction pour ajouter à l'historique
+  const addToHistory = useCallback(
+    (newValue: string) => {
+      const newHistory = history.slice(0, historyIndex + 1);
+      newHistory.push(newValue);
+      setHistory(newHistory);
+      setHistoryIndex(newHistory.length - 1);
+    },
+    [history, historyIndex]
+  );
+
+  // Fonction undo
+  const undo = useCallback(() => {
+    if (historyIndex > 0) {
+      const newIndex = historyIndex - 1;
+      setHistoryIndex(newIndex);
+      onChange(history[newIndex]);
+    }
+  }, [historyIndex, history, onChange]);
+
+  // Fonction redo
+  const redo = useCallback(() => {
+    if (historyIndex < history.length - 1) {
+      const newIndex = historyIndex + 1;
+      setHistoryIndex(newIndex);
+      onChange(history[newIndex]);
+    }
+  }, [historyIndex, history, onChange]);
+
+  // Fonction pour insérer du markdown
+  const insertMarkdown = useCallback(
+    (prefix: string, suffix: string, placeholder: string) => {
+      const textarea = textareaRef.current;
+      if (!textarea) return;
+
+      const start = textarea.selectionStart;
+      const end = textarea.selectionEnd;
+      const selectedText = value.substring(start, end);
+      const textToInsert = selectedText || placeholder;
+
+      const newValue =
+        value.substring(0, start) +
+        prefix +
+        textToInsert +
+        suffix +
+        value.substring(end);
+      onChange(newValue);
+
+      // Ajouter à l'historique
+      addToHistory(newValue);
+
+      // Restaurer la position du curseur
+      setTimeout(() => {
+        const newCursorPos = start + prefix.length + textToInsert.length;
+        textarea.setSelectionRange(newCursorPos, newCursorPos);
+        textarea.focus();
+      }, 0);
+    },
+    [value, onChange, addToHistory]
+  );
+
+  // Fonction pour insérer au début de la ligne
+  const insertAtLineStart = useCallback(
+    (prefix: string) => {
+      const textarea = textareaRef.current;
+      if (!textarea) return;
+
+      const start = textarea.selectionStart;
+      value.substring(0, start).split('\n');
+      const currentLineStart = value.substring(0, start).lastIndexOf('\n') + 1;
+      const currentLine = value.substring(currentLineStart, start);
+
+      // Vérifier si la ligne commence déjà par le préfixe
+      const hasPrefix = currentLine.startsWith(prefix);
+      let newValue: string;
+      let newCursorPos: number;
+
+      if (hasPrefix) {
+        // Retirer le préfixe
+        newValue =
+          value.substring(0, currentLineStart) +
+          currentLine.substring(prefix.length) +
+          value.substring(start);
+        newCursorPos = start - prefix.length;
+      } else {
+        // Ajouter le préfixe
+        newValue =
+          value.substring(0, currentLineStart) +
+          prefix +
+          currentLine +
+          value.substring(start);
+        newCursorPos = start + prefix.length;
+      }
+
+      onChange(newValue);
+
+      // Ajouter à l'historique
+      addToHistory(newValue);
+
+      // Restaurer la position du curseur
+      setTimeout(() => {
+        textarea.setSelectionRange(newCursorPos, newCursorPos);
+        textarea.focus();
+      }, 0);
+    },
+    [value, onChange, addToHistory]
+  );
+
+  // Fonction de sauvegarde
+  const handleSave = useCallback(() => {
+    if (onSave && hasUnsavedChanges) {
+      onSave();
+      setHasUnsavedChanges(false);
+      lastSavedValueRef.current = value;
+    }
+  }, [onSave, hasUnsavedChanges, value]);
+
+  // Gestionnaire de raccourcis clavier
+  const handleKeyDown = useCallback(
+    (event: KeyboardEvent) => {
+      const isMac = navigator.platform.toUpperCase().indexOf('MAC') >= 0;
+      const cmdKey = isMac ? event.metaKey : event.ctrlKey;
+
+      if (!cmdKey) return;
+
+      switch (event.key.toLowerCase()) {
+        case 'n':
+          event.preventDefault();
+          onCreateNote?.();
+          break;
+        case 's':
+          event.preventDefault();
+          handleSave();
+          break;
+        case 'e':
+          event.preventDefault();
+          setIsEditing(!isEditing);
+          break;
+        case 'b':
+          event.preventDefault();
+          insertMarkdown('**', '**', 'texte en gras');
+          break;
+        case 'i':
+          event.preventDefault();
+          insertMarkdown('*', '*', 'texte en italique');
+          break;
+        case 'k':
+          if (event.shiftKey) {
+            event.preventDefault();
+            insertMarkdown('~~', '~~', 'texte barré');
+          } else {
+            event.preventDefault();
+            insertMarkdown('[', '](url)', 'texte du lien');
+          }
+          break;
+        case 'z':
+          if (event.shiftKey) {
+            event.preventDefault();
+            redo();
+          } else {
+            event.preventDefault();
+            undo();
+          }
+          break;
+        case 'a':
+          event.preventDefault();
+          textareaRef.current?.select();
+          break;
+        case 'c':
+        case 'v':
+        case 'x':
+          // Laisser les raccourcis de copier/coller/couper fonctionner normalement
+          break;
+        case 'f':
+          event.preventDefault();
+          // Rechercher dans le navigateur
+          break;
+        case 'g':
+          event.preventDefault();
+          // Rechercher suivant
+          break;
+        default:
+          if (event.shiftKey) {
+            switch (event.key) {
+              case 'P':
+                event.preventDefault();
+                setShowPreview(!showPreview);
+                break;
+              case 'C':
+                event.preventDefault();
+                insertMarkdown('```\n', '\n```', 'code');
+                break;
+              case 'X':
+                event.preventDefault();
+                insertMarkdown('~~', '~~', 'texte barré');
+                break;
+              case 'H':
+                event.preventDefault();
+                insertAtLineStart('# ');
+                break;
+              case '2':
+                event.preventDefault();
+                insertAtLineStart('## ');
+                break;
+              case '3':
+                event.preventDefault();
+                insertAtLineStart('### ');
+                break;
+              case 'L':
+                event.preventDefault();
+                insertAtLineStart('- ');
+                break;
+              case 'O':
+                event.preventDefault();
+                insertAtLineStart('1. ');
+                break;
+              case 'Q':
+                event.preventDefault();
+                insertMarkdown('> ', '', 'citation');
+                break;
+              case 'S':
+                event.preventDefault();
+                onToggleSidebar?.();
+                break;
+            }
+          }
+          break;
+      }
+    },
+    [
+      isEditing,
+      showPreview,
+      handleSave,
+      insertMarkdown,
+      insertAtLineStart,
+      undo,
+      redo,
+      onCreateNote,
+      onToggleSidebar,
+    ]
+  );
+
+  // Attacher les raccourcis clavier
+  useEffect(() => {
+    document.addEventListener('keydown', handleKeyDown);
+    return () => document.removeEventListener('keydown', handleKeyDown);
+  }, [handleKeyDown]);
+
+  // Auto-save
+  useEffect(() => {
+    if (autoSave && hasUnsavedChanges) {
+      if (autoSaveTimeoutRef.current) {
+        clearTimeout(autoSaveTimeoutRef.current);
+      }
+
+      autoSaveTimeoutRef.current = setTimeout(() => {
+        handleSave();
+      }, 2000);
+
+      return () => {
+        if (autoSaveTimeoutRef.current) {
+          clearTimeout(autoSaveTimeoutRef.current);
+        }
+      };
+    }
+  }, [value, autoSave, hasUnsavedChanges, handleSave]);
+
+  // Détecter les changements
+  useEffect(() => {
+    if (value !== lastSavedValueRef.current) {
+      setHasUnsavedChanges(true);
+    }
+  }, [value]);
+
+  // Ajouter les changements manuels à l'historique
+  useEffect(() => {
+    if (value !== history[historyIndex]) {
+      addToHistory(value);
+    }
+  }, [value, history, historyIndex, addToHistory]);
+
+  return (
+    <div
+      className={`flex flex-col h-full bg-[var(--card)]/40 backdrop-blur-md border border-[var(--border)]/60 rounded-lg overflow-hidden relative before:absolute before:inset-0 before:bg-gradient-to-br before:from-[color-mix(in_srgb,var(--primary)_8%,transparent)] before:via-[color-mix(in_srgb,var(--primary)_4%,transparent)] before:to-transparent before:opacity-80 before:pointer-events-none ${className}`}
+    >
+      {/* Tags Input en mode édition */}
+      {isEditing && onTagsChange && (
+        <div className="px-6 py-3 border-b border-[var(--border)]/30 bg-[var(--card)]/20 backdrop-blur-sm">
+          <div className="flex items-center gap-2">
+            <span className="text-sm font-medium text-[var(--foreground)]">
+              Tags:
+            </span>
+            <TagInput
+              tags={tags}
+              onChange={onTagsChange}
+              placeholder="Ajouter des tags..."
+              maxTags={10}
+            />
+          </div>
+        </div>
+      )}
+
+      {/* Editor/Tags Area */}
+      <div className="flex-1 flex overflow-hidden">
+        {!isEditing ? (
+          /* Mode Aperçu avec Tags */
+          <div className="w-full flex flex-col">
+            {/* Barre des tags */}
+            {tags && tags.length > 0 && (
+              <div className="p-3 border-b border-[var(--border)]/60 bg-[var(--card)]/40 backdrop-blur-md relative before:absolute before:inset-0 before:bg-gradient-to-r before:from-[color-mix(in_srgb,var(--primary)_8%,transparent)] before:via-[color-mix(in_srgb,var(--primary)_4%,transparent)] before:to-transparent before:opacity-80 before:pointer-events-none">
+                <span className="text-sm font-medium text-[var(--foreground)] relative z-10 mb-2 block">
+                  Tags:
+                </span>
+                <TagDisplay
+                  tags={tags}
+                  availableTags={availableTags}
+                  maxTags={10}
+                  size="sm"
+                  showColors={true}
+                  showDot={false}
+                />
+              </div>
+            )}
+
+            {/* Barre de l'aperçu */}
+            <div className="p-3 border-b border-[var(--border)]/60 bg-[var(--card)]/40 backdrop-blur-md relative before:absolute before:inset-0 before:bg-gradient-to-r before:from-[color-mix(in_srgb,var(--primary)_8%,transparent)] before:via-[color-mix(in_srgb,var(--primary)_4%,transparent)] before:to-transparent before:opacity-80 before:pointer-events-none">
+              <div className="flex items-center justify-between relative z-10">
+                <span className="text-sm font-medium text-[var(--foreground)]">
+                  Aperçu
+                </span>
+                <button
+                  onClick={() => setIsEditing(true)}
+                  className="flex items-center gap-1 px-2 py-1 text-xs rounded bg-[var(--primary)]/80 hover:bg-[var(--primary)]/90 backdrop-blur-sm text-[var(--primary-foreground)] transition-all duration-200"
+                >
+                  <Edit3 className="w-3 h-3" />
+                  Éditer
+                </button>
+              </div>
+            </div>
+
+            {/* Contenu de l'aperçu */}
+            <div className="flex-1 overflow-auto p-6 bg-[var(--background)]/50 backdrop-blur-sm">
+              <div className="prose prose-sm max-w-none prose-headings:text-[var(--foreground)] prose-p:text-[var(--foreground)] prose-strong:text-[var(--foreground)] prose-strong:font-bold prose-em:text-[var(--muted-foreground)] prose-code:text-[var(--accent)] prose-pre:bg-[var(--card)]/60 prose-pre:border prose-pre:border-[var(--border)]/60 prose-blockquote:border-[var(--primary)] prose-blockquote:text-[var(--muted-foreground)] prose-a:text-[var(--primary)] prose-table:border-[var(--border)]/60 prose-th:bg-[var(--card)]/40 prose-th:text-[var(--foreground)] prose-td:text-[var(--foreground)]">
+                <ReactMarkdown
+                  remarkPlugins={[remarkGfm]}
+                  rehypePlugins={[rehypeHighlight, rehypeSanitize]}
+                  components={{
+                    // Custom styling for better integration
+                    h1: ({ children }) => (
+                      <h1 className="text-3xl font-bold text-[var(--foreground)] mb-6 mt-8 first:mt-0 bg-gradient-to-r from-[var(--primary)] to-[var(--accent)] bg-clip-text text-transparent">
+                        {children}
+                      </h1>
+                    ),
+                    h2: ({ children }) => (
+                      <h2 className="text-2xl font-bold text-[var(--foreground)] mb-4 mt-6 border-b border-[var(--border)]/30 pb-2">
+                        {children}
+                      </h2>
+                    ),
+                    h3: ({ children }) => (
+                      <h3 className="text-xl font-semibold text-[var(--foreground)] mb-3 mt-5 flex items-center gap-2">
+                        <span className="w-2 h-2 bg-[var(--primary)] rounded-full"></span>
+                        {children}
+                      </h3>
+                    ),
+                    h4: ({ children }) => (
+                      <h4 className="text-lg font-semibold text-[var(--foreground)] mb-2 mt-4">
+                        {children}
+                      </h4>
+                    ),
+                    h5: ({ children }) => (
+                      <h5 className="text-base font-semibold text-[var(--foreground)] mb-2 mt-3">
+                        {children}
+                      </h5>
+                    ),
+                    h6: ({ children }) => (
+                      <h6 className="text-sm font-semibold text-[var(--foreground)] mb-2 mt-3 text-[var(--muted-foreground)]">
+                        {children}
+                      </h6>
+                    ),
+                    p: ({ children }) => (
+                      <p className="text-[var(--foreground)] mb-4 leading-relaxed">
+                        {children}
+                      </p>
+                    ),
+                    ul: ({ children }) => (
+                      <ul className="mb-4 space-y-2">{children}</ul>
+                    ),
+                    ol: ({ children }) => (
+                      <ol className="mb-4 space-y-2 list-decimal list-inside">
+                        {children}
+                      </ol>
+                    ),
+                    li: ({ children }) => (
+                      <li className="text-[var(--foreground)] flex items-start gap-2">
+                        <span className="w-1.5 h-1.5 bg-[var(--primary)] rounded-full mt-2 flex-shrink-0"></span>
+                        <span>{children}</span>
+                      </li>
+                    ),
+                    blockquote: ({ children }) => (
+                      <blockquote className="border-l-4 border-[var(--primary)] pl-4 py-2 my-4 bg-[var(--card)]/20 backdrop-blur-sm rounded-r-lg">
+                        <div className="text-[var(--muted-foreground)] italic">
+                          {children}
+                        </div>
+                      </blockquote>
+                    ),
+                    code: ({ children, className }) => {
+                      const isInline = !className;
+                      if (isInline) {
+                        return (
+                          <code className="bg-[var(--card)]/60 px-2 py-1 rounded text-[var(--accent)] font-mono text-sm border border-[var(--border)]/40">
+                            {children}
+                          </code>
+                        );
+                      }
+                      return <code className={className}>{children}</code>;
+                    },
+                    pre: ({ children }) => (
+                      <pre className="bg-[var(--card)]/60 border border-[var(--border)]/60 rounded-lg p-4 overflow-x-auto backdrop-blur-sm">
+                        {children}
+                      </pre>
+                    ),
+                    a: ({ children, href }) => (
+                      <a
+                        href={href}
+                        className="text-[var(--primary)] hover:text-[var(--primary)]/80 underline decoration-[var(--primary)]/50 hover:decoration-[var(--primary)] transition-colors"
+                        target="_blank"
+                        rel="noopener noreferrer"
+                      >
+                        {children}
+                      </a>
+                    ),
+                    table: ({ children }) => (
+                      <div className="overflow-x-auto mb-6 rounded-lg border border-[var(--border)]/60">
+                        <table className="min-w-full">{children}</table>
+                      </div>
+                    ),
+                    th: ({ children }) => (
+                      <th className="border-b border-[var(--border)]/60 bg-[var(--card)]/40 px-4 py-3 text-left font-semibold text-[var(--foreground)] backdrop-blur-sm">
+                        {children}
+                      </th>
+                    ),
+                    td: ({ children }) => (
+                      <td className="border-b border-[var(--border)]/30 px-4 py-3 text-[var(--foreground)]">
+                        {children}
+                      </td>
+                    ),
+                    hr: () => (
+                      <hr className="my-8 border-0 h-px bg-gradient-to-r from-transparent via-[var(--border)] to-transparent" />
+                    ),
+                    strong: ({ children }) => (
+                      <strong className="font-bold text-[var(--foreground)] bg-gradient-to-r from-[var(--primary)]/20 to-[var(--accent)]/20 px-1 py-0.5 rounded">
+                        {children}
+                      </strong>
+                    ),
+                    em: ({ children }) => (
+                      <em className="italic text-[var(--muted-foreground)]">
+                        {children}
+                      </em>
+                    ),
+                  }}
+                >
+                  {value || "*Commencez à écrire pour voir l'aperçu...*"}
+                </ReactMarkdown>
+              </div>
+            </div>
+          </div>
+        ) : (
+          /* Mode Édition */
+          <>
+            {/* Editor */}
+            <div
+              className={`flex-1 flex flex-col ${showPreview ? 'w-1/2' : 'w-full'}`}
+            >
+              <div className="p-3 border-b border-[var(--border)]/60 bg-[var(--card)]/40 backdrop-blur-md relative before:absolute before:inset-0 before:bg-gradient-to-r before:from-[color-mix(in_srgb,var(--primary)_8%,transparent)] before:via-[color-mix(in_srgb,var(--primary)_4%,transparent)] before:to-transparent before:opacity-80 before:pointer-events-none">
+                <div className="flex items-center justify-between relative z-10">
+                  <span className="text-sm font-medium text-[var(--foreground)]">
+                    Éditeur Markdown
+                  </span>
+                  <div className="flex items-center gap-2">
+                    {hasUnsavedChanges && (
+                      <span className="text-xs text-[var(--accent)] font-medium">
+                        Non sauvegardé
+                      </span>
+                    )}
+                    <button
+                      onClick={() => setIsEditing(false)}
+                      className="flex items-center gap-1 px-2 py-1 text-xs rounded bg-[var(--card)]/60 hover:bg-[var(--card)]/80 backdrop-blur-sm text-[var(--foreground)] border border-[var(--border)]/40 hover:border-[var(--border)]/60 transition-all duration-200"
+                    >
+                      <X className="w-3 h-3" />
+                      Fermer
+                    </button>
+                    <button
+                      onClick={() => setShowPreview(!showPreview)}
+                      className="flex items-center gap-1 px-2 py-1 text-xs rounded bg-[var(--card)]/60 hover:bg-[var(--card)]/80 backdrop-blur-sm text-[var(--foreground)] border border-[var(--border)]/40 hover:border-[var(--border)]/60 transition-all duration-200"
+                    >
+                      {showPreview ? (
+                        <EyeOff className="w-3 h-3" />
+                      ) : (
+                        <Eye className="w-3 h-3" />
+                      )}
+                      {showPreview ? 'Masquer' : 'Aperçu'}
+                    </button>
+                  </div>
+                </div>
+              </div>
+              <div className="flex-1 overflow-hidden">
+                <textarea
+                  ref={textareaRef}
+                  value={value}
+                  onChange={(e) => onChange(e.target.value)}
+                  placeholder={placeholder}
+                  className="w-full h-full p-6 bg-[var(--background)]/50 backdrop-blur-sm text-[var(--foreground)] placeholder-[var(--muted-foreground)] resize-none border-none outline-none font-mono text-sm leading-relaxed"
+                  style={{
+                    fontFamily:
+                      'ui-monospace, SFMono-Regular, "SF Mono", Consolas, "Liberation Mono", Menlo, monospace',
+                  }}
+                />
+              </div>
+            </div>
+
+            {/* Preview */}
+            {showPreview && (
+              <div className="w-1/2 flex flex-col border-l border-[var(--border)]/60">
+                <div className="p-3 border-b border-[var(--border)]/60 bg-[var(--card)]/40 backdrop-blur-md relative before:absolute before:inset-0 before:bg-gradient-to-r before:from-[color-mix(in_srgb,var(--primary)_8%,transparent)] before:via-[color-mix(in_srgb,var(--primary)_4%,transparent)] before:to-transparent before:opacity-80 before:pointer-events-none">
+                  <span className="text-sm font-medium text-[var(--foreground)] relative z-10">
+                    Aperçu
+                  </span>
+                </div>
+                <div className="flex-1 overflow-auto p-6 bg-[var(--background)]/50 backdrop-blur-sm">
+                  <div className="prose prose-sm max-w-none prose-headings:text-[var(--foreground)] prose-p:text-[var(--foreground)] prose-strong:text-[var(--foreground)] prose-strong:font-bold prose-em:text-[var(--muted-foreground)] prose-code:text-[var(--accent)] prose-pre:bg-[var(--card)]/60 prose-pre:border prose-pre:border-[var(--border)]/60 prose-blockquote:border-[var(--primary)] prose-blockquote:text-[var(--muted-foreground)] prose-a:text-[var(--primary)] prose-table:border-[var(--border)]/60 prose-th:bg-[var(--card)]/40 prose-th:text-[var(--foreground)] prose-td:text-[var(--foreground)]">
+                    <ReactMarkdown
+                      remarkPlugins={[remarkGfm]}
+                      rehypePlugins={[rehypeHighlight, rehypeSanitize]}
+                      components={{
+                        // Custom styling for better integration
+                        h1: ({ children }) => (
+                          <h1 className="text-3xl font-bold text-[var(--foreground)] mb-6 mt-8 first:mt-0 bg-gradient-to-r from-[var(--primary)] to-[var(--accent)] bg-clip-text text-transparent">
+                            {children}
+                          </h1>
+                        ),
+                        h2: ({ children }) => (
+                          <h2 className="text-2xl font-bold text-[var(--foreground)] mb-4 mt-6 border-b border-[var(--border)]/30 pb-2">
+                            {children}
+                          </h2>
+                        ),
+                        h3: ({ children }) => (
+                          <h3 className="text-xl font-semibold text-[var(--foreground)] mb-3 mt-5 flex items-center gap-2">
+                            <span className="w-2 h-2 bg-[var(--primary)] rounded-full"></span>
+                            {children}
+                          </h3>
+                        ),
+                        h4: ({ children }) => (
+                          <h4 className="text-lg font-semibold text-[var(--foreground)] mb-2 mt-4">
+                            {children}
+                          </h4>
+                        ),
+                        h5: ({ children }) => (
+                          <h5 className="text-base font-semibold text-[var(--foreground)] mb-2 mt-3">
+                            {children}
+                          </h5>
+                        ),
+                        h6: ({ children }) => (
+                          <h6 className="text-sm font-semibold text-[var(--foreground)] mb-2 mt-3 text-[var(--muted-foreground)]">
+                            {children}
+                          </h6>
+                        ),
+                        p: ({ children }) => (
+                          <p className="text-[var(--foreground)] mb-4 leading-relaxed">
+                            {children}
+                          </p>
+                        ),
+                        ul: ({ children }) => (
+                          <ul className="mb-4 space-y-2">{children}</ul>
+                        ),
+                        ol: ({ children }) => (
+                          <ol className="mb-4 space-y-2 list-decimal list-inside">
+                            {children}
+                          </ol>
+                        ),
+                        li: ({ children }) => (
+                          <li className="text-[var(--foreground)] flex items-start gap-2">
+                            <span className="w-1.5 h-1.5 bg-[var(--primary)] rounded-full mt-2 flex-shrink-0"></span>
+                            <span>{children}</span>
+                          </li>
+                        ),
+                        blockquote: ({ children }) => (
+                          <blockquote className="border-l-4 border-[var(--primary)] pl-4 py-2 my-4 bg-[var(--card)]/20 backdrop-blur-sm rounded-r-lg">
+                            <div className="text-[var(--muted-foreground)] italic">
+                              {children}
+                            </div>
+                          </blockquote>
+                        ),
+                        code: ({ children, className }) => {
+                          const isInline = !className;
+                          if (isInline) {
+                            return (
+                              <code className="bg-[var(--card)]/60 px-2 py-1 rounded text-[var(--accent)] font-mono text-sm border border-[var(--border)]/40">
+                                {children}
+                              </code>
+                            );
+                          }
+                          return <code className={className}>{children}</code>;
+                        },
+                        pre: ({ children }) => (
+                          <pre className="bg-[var(--card)]/60 border border-[var(--border)]/60 rounded-lg p-4 overflow-x-auto backdrop-blur-sm">
+                            {children}
+                          </pre>
+                        ),
+                        a: ({ children, href }) => (
+                          <a
+                            href={href}
+                            className="text-[var(--primary)] hover:text-[var(--primary)]/80 underline decoration-[var(--primary)]/50 hover:decoration-[var(--primary)] transition-colors"
+                            target="_blank"
+                            rel="noopener noreferrer"
+                          >
+                            {children}
+                          </a>
+                        ),
+                        table: ({ children }) => (
+                          <div className="overflow-x-auto mb-6 rounded-lg border border-[var(--border)]/60">
+                            <table className="min-w-full">{children}</table>
+                          </div>
+                        ),
+                        th: ({ children }) => (
+                          <th className="border-b border-[var(--border)]/60 bg-[var(--card)]/40 px-4 py-3 text-left font-semibold text-[var(--foreground)] backdrop-blur-sm">
+                            {children}
+                          </th>
+                        ),
+                        td: ({ children }) => (
+                          <td className="border-b border-[var(--border)]/30 px-4 py-3 text-[var(--foreground)]">
+                            {children}
+                          </td>
+                        ),
+                        hr: () => (
+                          <hr className="my-8 border-0 h-px bg-gradient-to-r from-transparent via-[var(--border)] to-transparent" />
+                        ),
+                        strong: ({ children }) => (
+                          <strong className="font-bold text-[var(--foreground)] bg-gradient-to-r from-[var(--primary)]/20 to-[var(--accent)]/20 px-1 py-0.5 rounded">
+                            {children}
+                          </strong>
+                        ),
+                        em: ({ children }) => (
+                          <em className="italic text-[var(--muted-foreground)]">
+                            {children}
+                          </em>
+                        ),
+                      }}
+                    >
+                      {value || "*Commencez à écrire pour voir l'aperçu...*"}
+                    </ReactMarkdown>
+                  </div>
+                </div>
+              </div>
+            )}
+          </>
+        )}
+      </div>
+    </div>
+  );
+}

src/components/notes/NotesList.tsx

@@ -0,0 +1,253 @@
+'use client';
+
+import { useState, useMemo } from 'react';
+import { Note } from '@/services/notes';
+import { Search, Plus, Calendar, Trash2, Tags, List } from 'lucide-react';
+import { formatDistanceToNow } from 'date-fns';
+import { fr } from 'date-fns/locale';
+import { TagDisplay } from '@/components/ui/TagDisplay';
+import { Tag } from '@/lib/types';
+
+interface NotesListProps {
+  notes: Note[];
+  onSelectNote: (note: Note) => void;
+  onCreateNote: () => void;
+  onDeleteNote: (noteId: string) => void;
+  selectedNoteId?: string;
+  isLoading?: boolean;
+  availableTags?: Tag[];
+}
+
+export function NotesList({
+  notes,
+  onSelectNote,
+  onCreateNote,
+  onDeleteNote,
+  selectedNoteId,
+  isLoading = false,
+  availableTags = [],
+}: NotesListProps) {
+  const [searchQuery, setSearchQuery] = useState('');
+  const [showDeleteConfirm, setShowDeleteConfirm] = useState<string | null>(
+    null
+  );
+  const [groupByTags, setGroupByTags] = useState(true);
+
+  // Filter notes based on search query
+  const filteredNotes = notes.filter(
+    (note) =>
+      note.title.toLowerCase().includes(searchQuery.toLowerCase()) ||
+      note.content.toLowerCase().includes(searchQuery.toLowerCase())
+  );
+
+  // Group notes by tags
+  const groupedNotes = useMemo(() => {
+    if (!groupByTags) {
+      return { 'Toutes les notes': filteredNotes };
+    }
+
+    const groups: { [key: string]: Note[] } = {};
+
+    // Notes avec tags
+    filteredNotes.forEach((note) => {
+      if (note.tags && note.tags.length > 0) {
+        note.tags.forEach((tag) => {
+          if (!groups[tag]) {
+            groups[tag] = [];
+          }
+          groups[tag].push(note);
+        });
+      } else {
+        // Notes sans tags
+        if (!groups['Sans tags']) {
+          groups['Sans tags'] = [];
+        }
+        groups['Sans tags'].push(note);
+      }
+    });
+
+    // Trier les groupes par nom de tag
+    const sortedGroups: { [key: string]: Note[] } = {};
+    Object.keys(groups)
+      .sort()
+      .forEach((key) => {
+        sortedGroups[key] = groups[key];
+      });
+
+    return sortedGroups;
+  }, [filteredNotes, groupByTags]);
+
+  const handleDeleteClick = (noteId: string, e: React.MouseEvent) => {
+    e.stopPropagation();
+    setShowDeleteConfirm(noteId);
+  };
+
+  const handleDeleteConfirm = (noteId: string) => {
+    onDeleteNote(noteId);
+    setShowDeleteConfirm(null);
+  };
+
+  const handleDeleteCancel = () => {
+    setShowDeleteConfirm(null);
+  };
+
+  const getNoteTitle = (content: string): string => {
+    // Extract title from first line, removing markdown headers
+    const firstLine = content.split('\n')[0] || '';
+    return firstLine.replace(/^#+\s*/, '').trim() || 'Sans titre';
+  };
+
+  return (
+    <div className="flex flex-col h-full bg-[var(--card)]/40 backdrop-blur-md border-r border-[var(--border)]/60 relative before:absolute before:inset-0 before:bg-gradient-to-br before:from-[color-mix(in_srgb,var(--primary)_8%,transparent)] before:via-[color-mix(in_srgb,var(--primary)_4%,transparent)] before:to-transparent before:opacity-80 before:pointer-events-none">
+      {/* Header */}
+      <div className="p-4 border-b border-[var(--border)]">
+        <div className="mb-4 space-y-2">
+          <div className="flex justify-end">
+            <button
+              onClick={() => setGroupByTags(!groupByTags)}
+              className={`p-2 rounded-md transition-all duration-200 ${
+                groupByTags
+                  ? 'bg-[var(--primary)]/20 text-[var(--primary)]'
+                  : 'bg-[var(--card)]/60 hover:bg-[var(--card)]/80 text-[var(--muted-foreground)]'
+              }`}
+              title={groupByTags ? 'Vue par liste' : 'Vue par tags'}
+            >
+              {groupByTags ? (
+                <Tags className="w-4 h-4" />
+              ) : (
+                <List className="w-4 h-4" />
+              )}
+            </button>
+          </div>
+          <button
+            onClick={onCreateNote}
+            className="w-full flex items-center justify-center gap-2 px-3 py-2 bg-[var(--primary)]/80 hover:bg-[var(--primary)]/90 backdrop-blur-sm text-[var(--primary-foreground)] rounded-md text-sm font-medium transition-all duration-200 shadow-lg shadow-[var(--primary)]/20 hover:shadow-xl hover:shadow-[var(--primary)]/30"
+          >
+            <Plus className="w-4 h-4" />
+            Nouvelle note
+          </button>
+        </div>
+
+        {/* Search */}
+        <div className="relative">
+          <Search className="absolute left-3 top-1/2 transform -translate-y-1/2 w-4 h-4 text-[var(--muted-foreground)]" />
+          <input
+            type="text"
+            placeholder="Rechercher"
+            value={searchQuery}
+            onChange={(e) => setSearchQuery(e.target.value)}
+            className="w-full pl-10 pr-4 py-2 border border-[var(--border)]/60 rounded-md bg-[var(--card)]/40 backdrop-blur-sm text-[var(--foreground)] placeholder-[var(--muted-foreground)] focus:outline-none focus:ring-2 focus:ring-[var(--primary)]/50 focus:border-[var(--primary)]/50 focus:bg-[var(--card)]/60 transition-all duration-200"
+          />
+        </div>
+      </div>
+
+      {/* Notes List */}
+      <div className="flex-1 overflow-y-auto">
+        {isLoading ? (
+          <div className="p-4 text-center text-[var(--muted-foreground)]">
+            Chargement des notes...
+          </div>
+        ) : filteredNotes.length === 0 ? (
+          <div className="p-4 text-center text-[var(--muted-foreground)]">
+            {searchQuery ? 'Aucune note trouvée' : 'Aucune note pour le moment'}
+          </div>
+        ) : (
+          <div className="p-2 space-y-4">
+            {Object.entries(groupedNotes).map(([groupName, groupNotes]) => (
+              <div key={groupName}>
+                {/* Group Header */}
+                <div className="px-3 py-2 bg-[var(--card)]/30 backdrop-blur-sm border-b border-[var(--border)]/30 rounded-t-lg">
+                  <h3 className="text-xs font-mono font-medium text-[var(--primary)] uppercase tracking-wider">
+                    {groupName} ({groupNotes.length})
+                  </h3>
+                </div>
+
+                {/* Group Notes */}
+                <div className="space-y-1">
+                  {groupNotes.map((note) => (
+                    <div
+                      key={note.id}
+                      onClick={() => onSelectNote(note)}
+                      className={`group relative p-3 cursor-pointer transition-all duration-200 backdrop-blur-sm ${
+                        selectedNoteId === note.id
+                          ? 'bg-[var(--primary)]/20 border border-[var(--primary)]/30 shadow-lg shadow-[var(--primary)]/10'
+                          : 'bg-[var(--card)]/30 hover:bg-[var(--card)]/50 border border-[var(--border)]/40 hover:border-[var(--border)]/60 hover:shadow-md'
+                      }`}
+                    >
+                      <div className="flex items-start justify-between">
+                        <div className="flex-1 min-w-0">
+                          <h3 className="font-medium text-[var(--foreground)] truncate mb-2">
+                            {getNoteTitle(note.content)}
+                          </h3>
+
+                          {/* Tags - seulement si pas groupé par tags */}
+                          {!groupByTags &&
+                            note.tags &&
+                            note.tags.length > 0 && (
+                              <div className="mb-2">
+                                <TagDisplay
+                                  tags={note.tags}
+                                  availableTags={availableTags}
+                                  maxTags={2}
+                                  size="sm"
+                                  showColors={true}
+                                  showDot={false}
+                                />
+                              </div>
+                            )}
+
+                          <div className="flex items-center gap-2 text-xs text-[var(--muted-foreground)]">
+                            <Calendar className="w-3 h-3" />
+                            <span>
+                              {formatDistanceToNow(new Date(note.updatedAt), {
+                                addSuffix: true,
+                                locale: fr,
+                              })}
+                            </span>
+                          </div>
+                        </div>
+
+                        <div className="flex items-center gap-1 opacity-0 group-hover:opacity-100 transition-opacity">
+                          <button
+                            onClick={(e) => handleDeleteClick(note.id, e)}
+                            className="p-1 hover:bg-[var(--destructive)]/10 rounded text-[var(--destructive)] transition-colors"
+                            title="Supprimer"
+                          >
+                            <Trash2 className="w-3 h-3" />
+                          </button>
+                        </div>
+                      </div>
+
+                      {/* Delete Confirmation */}
+                      {showDeleteConfirm === note.id && (
+                        <div className="absolute inset-0 bg-[var(--destructive)]/5 border border-[var(--destructive)]/20 rounded-lg p-3 backdrop-blur-sm">
+                          <div className="text-sm text-[var(--foreground)] mb-2">
+                            Supprimer cette note ?
+                          </div>
+                          <div className="flex gap-2">
+                            <button
+                              onClick={() => handleDeleteConfirm(note.id)}
+                              className="px-2 py-1 bg-[var(--destructive)] text-[var(--primary-foreground)] rounded text-xs hover:bg-[var(--destructive)]/90"
+                            >
+                              Supprimer
+                            </button>
+                            <button
+                              onClick={handleDeleteCancel}
+                              className="px-2 py-1 bg-[var(--card)] text-[var(--foreground)] border border-[var(--border)] rounded text-xs hover:bg-[var(--card-hover)]"
+                            >
+                              Annuler
+                            </button>
+                          </div>
+                        </div>
+                      )}
+                    </div>
+                  ))}
+                </div>
+              </div>
+            ))}
+          </div>
+        )}
+      </div>
+    </div>
+  );
+}

src/components/ui/KeyboardShortcutsModal.tsx

@@ -47,22 +47,26 @@ export function KeyboardShortcutsModal({
   isOpen,
   onClose,
   shortcuts,
-  title = "Raccourcis clavier" 
+  title = 'Raccourcis clavier',
 }: KeyboardShortcutsModalProps) {
   // Grouper les raccourcis par catégorie
-  const groupedShortcuts = shortcuts.reduce((acc, shortcut) => {
+  const groupedShortcuts = shortcuts.reduce(
+    (acc, shortcut) => {
       const category = shortcut.category || 'Général';
       if (!acc[category]) {
         acc[category] = [];
       }
       acc[category].push(shortcut);
       return acc;
-  }, {} as Record<string, KeyboardShortcut[]>);
+    },
+    {} as Record<string, KeyboardShortcut[]>
+  );
 
   return (
     <Modal isOpen={isOpen} onClose={onClose} title={title} size="md">
-      <div className="space-y-4">
-        {Object.entries(groupedShortcuts).map(([category, categoryShortcuts]) => (
+      <div className="max-h-96 overflow-y-auto space-y-4">
+        {Object.entries(groupedShortcuts).map(
+          ([category, categoryShortcuts]) => (
             <div key={category}>
               <h3 className="text-xs font-mono font-semibold text-[var(--primary)] uppercase tracking-wider mb-2">
                 {category}
@@ -73,7 +77,8 @@ export function KeyboardShortcutsModal({
                 ))}
               </div>
             </div>
-        ))}
+          )
+        )}
 
         {shortcuts.length === 0 && (
           <div className="text-center py-6">

src/components/ui/header/HeaderNavigation.tsx

@@ -10,8 +10,13 @@ interface HeaderNavigationProps {
   onLinkClick?: () => void;
 }
 
-export function HeaderNavigation({ variant, className = '', onLinkClick }: HeaderNavigationProps) {
-  const { isConfigured: isJiraConfigured, config: jiraConfig } = useJiraConfig();
+export function HeaderNavigation({
+  variant,
+  className = '',
+  onLinkClick,
+}: HeaderNavigationProps) {
+  const { isConfigured: isJiraConfigured, config: jiraConfig } =
+    useJiraConfig();
   const pathname = usePathname();
 
   // Liste des liens de navigation
@@ -20,8 +25,16 @@ export function HeaderNavigation({ variant, className = '', onLinkClick }: Heade
     { href: '/kanban', label: 'Kanban' },
     { href: '/daily', label: 'Daily' },
     { href: '/weekly-manager', label: 'Weekly' },
-    ...(isJiraConfigured ? [{ href: '/jira-dashboard', label: `Jira${jiraConfig?.projectKey ? ` (${jiraConfig.projectKey})` : ''}` }] : []),
-    { href: '/settings', label: 'Settings' }
+    { href: '/notes', label: 'Notes' },
+    ...(isJiraConfigured
+      ? [
+          {
+            href: '/jira-dashboard',
+            label: `Jira${jiraConfig?.projectKey ? ` (${jiraConfig.projectKey})` : ''}`,
+          },
+        ]
+      : []),
+    { href: '/settings', label: 'Settings' },
   ];
 
   // Fonction pour déterminer si un lien est actif
@@ -34,7 +47,8 @@ export function HeaderNavigation({ variant, className = '', onLinkClick }: Heade
 
   // Fonction pour obtenir les classes CSS d'un lien (desktop)
   const getLinkClasses = (href: string) => {
-    const baseClasses = "font-mono text-sm uppercase tracking-wider transition-colors px-3 py-1.5 rounded-md";
+    const baseClasses =
+      'font-mono text-sm uppercase tracking-wider transition-colors px-3 py-1.5 rounded-md';
 
     if (isActiveLink(href)) {
       return `${baseClasses} text-[var(--primary)] bg-[var(--primary)]/10 border border-[var(--primary)]/30`;
@@ -45,7 +59,8 @@ export function HeaderNavigation({ variant, className = '', onLinkClick }: Heade
 
   // Fonction pour obtenir les classes CSS d'un lien (mobile)
   const getMobileLinkClasses = (href: string) => {
-    const baseClasses = "font-mono text-sm uppercase tracking-wider transition-colors px-4 py-3 rounded-md block w-full text-left";
+    const baseClasses =
+      'font-mono text-sm uppercase tracking-wider transition-colors px-4 py-3 rounded-md block w-full text-left';
 
     if (isActiveLink(href)) {
       return `${baseClasses} text-[var(--primary)] bg-[var(--primary)]/10 border border-[var(--primary)]/30`;
@@ -87,11 +102,7 @@ export function HeaderNavigation({ variant, className = '', onLinkClick }: Heade
       {/* Plus d'éléments sur très grands écrans */}
       <div className="hidden 2xl:flex items-center gap-1">
         {navLinks.slice(4).map(({ href, label }) => (
-          <Link
-            key={href}
-            href={href}
-            className={getLinkClasses(href)}
-          >
+          <Link key={href} href={href} className={getLinkClasses(href)}>
             {label}
           </Link>
         ))}

src/contexts/KeyboardShortcutsContext.tsx

@@ -1,6 +1,12 @@
 'use client';
 
-import { createContext, useContext, useState, useEffect, ReactNode } from 'react';
+import {
+  createContext,
+  useContext,
+  useState,
+  useEffect,
+  ReactNode,
+} from 'react';
 import { usePathname } from 'next/navigation';
 
 export interface KeyboardShortcut {
@@ -20,28 +26,28 @@ const PAGE_SHORTCUTS: PageShortcuts = {
     {
       keys: ['Cmd', '?'],
       description: 'Afficher les raccourcis clavier',
-      category: 'Navigation'
+      category: 'Navigation',
     },
     {
       keys: ['Shift', 'Q'],
       description: 'Basculer le thème',
-      category: 'Apparence'
+      category: 'Apparence',
     },
     {
       keys: ['Shift', 'W'],
       description: 'Faire tourner les thèmes dark',
-      category: 'Apparence'
+      category: 'Apparence',
     },
     {
       keys: ['Shift', 'B'],
       description: 'Changer le background',
-      category: 'Apparence'
+      category: 'Apparence',
     },
     {
       keys: ['Esc'],
       description: 'Fermer les modales/annuler',
-      category: 'Navigation'
-    }
+      category: 'Navigation',
+    },
   ],
 
   // Dashboard
@@ -49,8 +55,8 @@ const PAGE_SHORTCUTS: PageShortcuts = {
     {
       keys: ['Shift', 'K'],
       description: 'Vers Kanban',
-      category: 'Navigation'
-    }
+      category: 'Navigation',
+    },
   ],
 
   // Kanban
@@ -58,53 +64,53 @@ const PAGE_SHORTCUTS: PageShortcuts = {
     {
       keys: ['Shift', 'N'],
       description: 'Créer une nouvelle tâche',
-      category: 'Actions'
+      category: 'Actions',
     },
     {
       keys: ['Space'],
       description: 'Basculer la vue compacte',
-      category: 'Vue'
+      category: 'Vue',
     },
     {
       keys: ['Shift', 'F'],
       description: 'Ouvrir les filtres',
-      category: 'Filtres'
+      category: 'Filtres',
     },
     {
       keys: ['Shift', 'S'],
       description: 'Basculer les swimlanes',
-      category: 'Vue'
+      category: 'Vue',
     },
     {
       keys: ['Shift', 'O'],
       description: 'Basculer les objectifs',
-      category: 'Vue'
+      category: 'Vue',
     },
     {
       keys: ['Shift', 'D'],
       description: 'Filtrer par date de fin',
-      category: 'Filtres'
+      category: 'Filtres',
     },
     {
       keys: ['Shift', 'Z'],
       description: 'Basculer la taille de police',
-      category: 'Vue'
+      category: 'Vue',
     },
     {
       keys: ['Tab'],
       description: 'Navigation entre colonnes',
-      category: 'Navigation'
+      category: 'Navigation',
     },
     {
       keys: ['Enter'],
       description: 'Valider une tâche',
-      category: 'Actions'
+      category: 'Actions',
     },
     {
       keys: ['Esc'],
       description: 'Annuler la création de tâche',
-      category: 'Actions'
-    }
+      category: 'Actions',
+    },
   ],
 
   // Daily
@@ -112,18 +118,18 @@ const PAGE_SHORTCUTS: PageShortcuts = {
     {
       keys: ['←', '→'],
       description: 'Navigation jour précédent/suivant',
-      category: 'Navigation'
+      category: 'Navigation',
     },
     {
       keys: ['Shift', 'H'],
-      description: 'Aller à aujourd\'hui',
-      category: 'Navigation'
+      description: "Aller à aujourd'hui",
+      category: 'Navigation',
     },
     {
       keys: ['Enter'],
       description: 'Valider un élément',
-      category: 'Actions'
-    }
+      category: 'Actions',
+    },
   ],
 
   // Manager
@@ -131,19 +137,153 @@ const PAGE_SHORTCUTS: PageShortcuts = {
     {
       keys: ['Cmd', 'Ctrl', 'N'],
       description: 'Créer un objectif',
-      category: 'Actions'
+      category: 'Actions',
     },
     {
       keys: ['←', '→'],
       description: 'Navigation semaine précédente/suivante',
-      category: 'Navigation'
+      category: 'Navigation',
     },
     {
       keys: ['Cmd', 'Ctrl', 'T'],
       description: 'Aller à cette semaine',
-      category: 'Navigation'
-    }
-  ]
+      category: 'Navigation',
+    },
+  ],
+
+  // Notes
+  '/notes': [
+    {
+      keys: ['Cmd', 'N'],
+      description: 'Créer une nouvelle note',
+      category: 'Actions',
+    },
+    {
+      keys: ['Cmd', 'S'],
+      description: 'Sauvegarder la note',
+      category: 'Actions',
+    },
+    {
+      keys: ['Cmd', 'E'],
+      description: 'Basculer mode édition/aperçu',
+      category: 'Navigation',
+    },
+    {
+      keys: ['Cmd', 'Shift', 'P'],
+      description: 'Basculer aperçu',
+      category: 'Navigation',
+    },
+    {
+      keys: ['Cmd', 'B'],
+      description: 'Texte en gras',
+      category: 'Édition',
+    },
+    {
+      keys: ['Cmd', 'I'],
+      description: 'Texte en italique',
+      category: 'Édition',
+    },
+    {
+      keys: ['Cmd', 'K'],
+      description: 'Créer un lien',
+      category: 'Édition',
+    },
+    {
+      keys: ['Cmd', 'Shift', 'K'],
+      description: 'Code inline',
+      category: 'Édition',
+    },
+    {
+      keys: ['Cmd', 'Shift', 'C'],
+      description: 'Bloc de code',
+      category: 'Édition',
+    },
+    {
+      keys: ['Cmd', 'Shift', 'X'],
+      description: 'Texte barré',
+      category: 'Édition',
+    },
+    {
+      keys: ['Cmd', 'Shift', 'H'],
+      description: 'Titre niveau 1',
+      category: 'Édition',
+    },
+    {
+      keys: ['Cmd', 'Shift', '2'],
+      description: 'Titre niveau 2',
+      category: 'Édition',
+    },
+    {
+      keys: ['Cmd', 'Shift', '3'],
+      description: 'Titre niveau 3',
+      category: 'Édition',
+    },
+    {
+      keys: ['Cmd', 'Shift', 'L'],
+      description: 'Liste à puces',
+      category: 'Édition',
+    },
+    {
+      keys: ['Cmd', 'Shift', 'O'],
+      description: 'Liste numérotée',
+      category: 'Édition',
+    },
+    {
+      keys: ['Cmd', 'Shift', 'Q'],
+      description: 'Citation',
+      category: 'Édition',
+    },
+    {
+      keys: ['Cmd', 'Z'],
+      description: 'Annuler',
+      category: 'Édition',
+    },
+    {
+      keys: ['Cmd', 'Shift', 'Z'],
+      description: 'Rétablir',
+      category: 'Édition',
+    },
+    {
+      keys: ['Cmd', 'A'],
+      description: 'Tout sélectionner',
+      category: 'Édition',
+    },
+    {
+      keys: ['Cmd', 'C'],
+      description: 'Copier',
+      category: 'Édition',
+    },
+    {
+      keys: ['Cmd', 'V'],
+      description: 'Coller',
+      category: 'Édition',
+    },
+    {
+      keys: ['Cmd', 'X'],
+      description: 'Couper',
+      category: 'Édition',
+    },
+    {
+      keys: ['Cmd', 'F'],
+      description: 'Rechercher',
+      category: 'Édition',
+    },
+    {
+      keys: ['Cmd', 'G'],
+      description: 'Rechercher suivant',
+      category: 'Édition',
+    },
+    {
+      keys: ['Cmd', 'Shift', 'G'],
+      description: 'Rechercher précédent',
+      category: 'Édition',
+    },
+    {
+      keys: ['Cmd', 'Shift', 'S'],
+      description: 'Basculer la barre latérale',
+      category: 'Navigation',
+    },
+  ],
 };
 
 interface KeyboardShortcutsContextType {
@@ -154,13 +294,17 @@ interface KeyboardShortcutsContextType {
   toggleModal: () => void;
 }
 
-const KeyboardShortcutsContext = createContext<KeyboardShortcutsContextType | undefined>(undefined);
+const KeyboardShortcutsContext = createContext<
+  KeyboardShortcutsContextType | undefined
+>(undefined);
 
 interface KeyboardShortcutsProviderProps {
   children: ReactNode;
 }
 
-export function KeyboardShortcutsProvider({ children }: KeyboardShortcutsProviderProps) {
+export function KeyboardShortcutsProvider({
+  children,
+}: KeyboardShortcutsProviderProps) {
   const [isOpen, setIsOpen] = useState(false);
   const pathname = usePathname();
 
@@ -211,7 +355,7 @@ export function KeyboardShortcutsProvider({ children }: KeyboardShortcutsProvide
     shortcuts,
     openModal: () => setIsOpen(true),
     closeModal: () => setIsOpen(false),
-    toggleModal: () => setIsOpen(prev => !prev)
+    toggleModal: () => setIsOpen((prev) => !prev),
   };
 
   return (
@@ -224,7 +368,9 @@ export function KeyboardShortcutsProvider({ children }: KeyboardShortcutsProvide
 export function useKeyboardShortcutsModal() {
   const context = useContext(KeyboardShortcutsContext);
   if (context === undefined) {
-    throw new Error('useKeyboardShortcutsModal must be used within a KeyboardShortcutsProvider');
+    throw new Error(
+      'useKeyboardShortcutsModal must be used within a KeyboardShortcutsProvider'
+    );
   }
   return context;
 }

src/services/notes.ts

@@ -0,0 +1,272 @@
+import { prisma } from '@/services/core/database';
+
+export interface Note {
+  id: string;
+  title: string;
+  content: string;
+  userId: string;
+  createdAt: Date;
+  updatedAt: Date;
+  tags?: string[];
+}
+
+export interface CreateNoteData {
+  title: string;
+  content: string;
+  userId: string;
+  tags?: string[];
+}
+
+export interface UpdateNoteData {
+  title?: string;
+  content?: string;
+  tags?: string[];
+}
+
+/**
+ * Service pour la gestion des notes markdown
+ */
+export class NotesService {
+  /**
+   * Récupère toutes les notes d'un utilisateur
+   */
+  async getNotes(userId: string): Promise<Note[]> {
+    const notes = await prisma.note.findMany({
+      where: { userId },
+      include: {
+        noteTags: {
+          include: {
+            tag: true,
+          },
+        },
+      },
+      orderBy: { updatedAt: 'desc' },
+    });
+
+    return notes.map((note) => ({
+      ...note,
+      tags: note.noteTags.map((nt) => nt.tag.name),
+    }));
+  }
+
+  /**
+   * Récupère une note par son ID
+   */
+  async getNoteById(noteId: string, userId: string): Promise<Note | null> {
+    const note = await prisma.note.findFirst({
+      where: {
+        id: noteId,
+        userId,
+      },
+      include: {
+        noteTags: {
+          include: {
+            tag: true,
+          },
+        },
+      },
+    });
+
+    if (!note) return null;
+
+    return {
+      ...note,
+      tags: note.noteTags.map((nt) => nt.tag.name),
+    };
+  }
+
+  /**
+   * Crée une nouvelle note
+   */
+  async createNote(data: CreateNoteData): Promise<Note> {
+    const note = await prisma.note.create({
+      data: {
+        title: data.title,
+        content: data.content,
+        userId: data.userId,
+        noteTags: data.tags
+          ? {
+              create: data.tags.map((tagName) => ({
+                tag: {
+                  connectOrCreate: {
+                    where: { name: tagName },
+                    create: { name: tagName },
+                  },
+                },
+              })),
+            }
+          : undefined,
+      },
+      include: {
+        noteTags: {
+          include: {
+            tag: true,
+          },
+        },
+      },
+    });
+
+    return {
+      ...note,
+      tags: note.noteTags.map((nt) => nt.tag.name),
+    };
+  }
+
+  /**
+   * Met à jour une note existante
+   */
+  async updateNote(
+    noteId: string,
+    userId: string,
+    data: UpdateNoteData
+  ): Promise<Note> {
+    // Vérifier que la note appartient à l'utilisateur
+    const existingNote = await prisma.note.findFirst({
+      where: {
+        id: noteId,
+        userId,
+      },
+    });
+
+    if (!existingNote) {
+      throw new Error('Note not found or access denied');
+    }
+
+    // Préparer les données de mise à jour
+    const updateData: {
+      updatedAt: Date;
+      title?: string;
+      content?: string;
+      noteTags?: {
+        deleteMany: Record<string, never>;
+        create: Array<{
+          tag: {
+            connectOrCreate: {
+              where: { name: string };
+              create: { name: string };
+            };
+          };
+        }>;
+      };
+    } = {
+      updatedAt: new Date(),
+    };
+
+    // Ajouter les champs de base s'ils sont fournis
+    if (data.title !== undefined) {
+      updateData.title = data.title;
+    }
+    if (data.content !== undefined) {
+      updateData.content = data.content;
+    }
+
+    // Gérer les tags si fournis
+    if (data.tags !== undefined) {
+      updateData.noteTags = {
+        deleteMany: {}, // Supprimer tous les tags existants
+        create: data.tags.map((tagName) => ({
+          tag: {
+            connectOrCreate: {
+              where: { name: tagName },
+              create: { name: tagName },
+            },
+          },
+        })),
+      };
+    }
+
+    const note = await prisma.note.update({
+      where: { id: noteId },
+      data: updateData,
+      include: {
+        noteTags: {
+          include: {
+            tag: true,
+          },
+        },
+      },
+    });
+
+    return {
+      ...note,
+      tags: note.noteTags.map((nt) => nt.tag.name),
+    };
+  }
+
+  /**
+   * Supprime une note
+   */
+  async deleteNote(noteId: string, userId: string): Promise<void> {
+    // Vérifier que la note appartient à l'utilisateur
+    const existingNote = await prisma.note.findFirst({
+      where: {
+        id: noteId,
+        userId,
+      },
+    });
+
+    if (!existingNote) {
+      throw new Error('Note not found or access denied');
+    }
+
+    await prisma.note.delete({
+      where: { id: noteId },
+    });
+  }
+
+  /**
+   * Recherche des notes par titre ou contenu
+   */
+  async searchNotes(userId: string, query: string): Promise<Note[]> {
+    const notes = await prisma.note.findMany({
+      where: {
+        userId,
+        OR: [{ title: { contains: query } }, { content: { contains: query } }],
+      },
+      orderBy: { updatedAt: 'desc' },
+    });
+
+    return notes;
+  }
+
+  /**
+   * Récupère les statistiques des notes d'un utilisateur
+   */
+  async getNotesStats(userId: string): Promise<{
+    totalNotes: number;
+    totalWords: number;
+    lastUpdated: Date | null;
+  }> {
+    const notes = await prisma.note.findMany({
+      where: { userId },
+      select: {
+        content: true,
+        updatedAt: true,
+      },
+    });
+
+    const totalNotes = notes.length;
+    const totalWords = notes.reduce((acc, note) => {
+      return (
+        acc + note.content.split(/\s+/).filter((word) => word.length > 0).length
+      );
+    }, 0);
+    const lastUpdated =
+      notes.length > 0
+        ? notes.reduce(
+            (latest, note) =>
+              note.updatedAt > latest ? note.updatedAt : latest,
+            notes[0].updatedAt
+          )
+        : null;
+
+    return {
+      totalNotes,
+      totalWords,
+      lastUpdated,
+    };
+  }
+}
+
+// Instance singleton
+export const notesService = new NotesService();