feat: Wizard IA + Export PDF + fixes blocs

- Wizard IA: création de carnet complet (étudiant/prof/ingénieur)
  - 3 profils, choix niveau, nombre de notes (3-12)
  - Étapes numérotées, messages de progression, écran de succès
  - Notes riches avec callouts, toggles, équations, colonnes
  - Structured View auto-créé avec propriétés Statut/Difficulté
  - Embeddings en arrière-plan
- Export PDF: clone le DOM réel, rend KaTeX, préserve couleurs callouts
- Fix: boutons toggle/callout en hover-only
- Fix: parsing JSON robuste (backslashes LaTeX)
- Fix: flushSync warning (queueMicrotask)
- Fix: drag handle clamp viewport
- Bouton wizard dans la sidebar (✨ à côté du +)
- i18n FR/EN complet

memento-note/locales/en.json

@@ -2451,6 +2451,36 @@
     "columnsAdd": "Add a column",
     "columnsDelete": "Delete columns",
     "columnsLabel": "columns",
+    "wizardTitle": "Create a notebook with AI",
+    "wizardChooseProfile": "What's your profile?",
+    "wizardProfileStudent": "Student",
+    "wizardProfileStudentDesc": "AI creates a structured course notebook with summaries, formulas and key takeaways",
+    "wizardProfileTeacher": "Teacher",
+    "wizardProfileTeacherDesc": "AI generates a course structure with chapters, exercises and learning objectives",
+    "wizardProfileEngineer": "Engineer / Professional",
+    "wizardProfileEngineerDesc": "AI creates organized technical documentation with specs and references",
+    "wizardTopicStudentPlaceholder": "e.g: Thermodynamics, Calculus, French Revolution...",
+    "wizardTopicTeacherPlaceholder": "e.g: Math 101, AP Physics, Algorithms...",
+    "wizardTopicEngineerPlaceholder": "e.g: Microservices architecture, Network security, ISO 27001...",
+    "wizardTopic": "Topic",
+    "wizardLevel": "Level",
+    "wizardLevelBeginner": "Beginner",
+    "wizardLevelIntermediate": "Intermediate",
+    "wizardLevelAdvanced": "Advanced",
+    "wizardLevelExpert": "Expert",
+    "wizardNoteCount": "Number of notes",
+    "wizardNotes": "notes",
+    "wizardConfirmHint": "AI will create a notebook with rich notes: callouts, collapsible sections, math formulas, comparison columns, outlines and links.",
+    "wizardGenerate": "Generate notebook",
+    "wizardLoading": "AI is creating your notebook with structured notes...",
+    "wizardProgressGenerating": "Generating content with AI...",
+    "wizardProgressCalling": "Calling AI...",
+    "wizardProgressParsing": "Parsing AI response...",
+    "wizardProgressCreating": "Creating notebook and notes...",
+    "wizardSuccess": "Notebook created successfully!",
+    "wizardCreated": "Notebook created:",
+    "wizardNotesCreated": "notes created",
+    "wizardOpenNotebook": "Open notebook",
     "calloutDelete": "Delete callout",
     "calloutUnwrap": "Disable callout",
     "calloutInfo": "Information",
@@ -2524,6 +2554,10 @@
       "Japonais": "Japanese"
     },
     "exportMarkdown": "Export as Markdown",
+    "exportPdf": "Export as PDF",
+    "pdfExportBlocked": "Popup blocked — allow popups to export as PDF",
+    "pdfExportLoading": "Generating PDF...",
+    "pdfExportSuccess": "PDF ready!",
     "importMarkdown": "Import Markdown",
     "markdownExportSuccess": "Note exported as Markdown",
     "markdownExportError": "Failed to export note",