CompetenceTrack v9 - Rich text editor, Drawing integration, PDF export, Notebook sharing, Templates, Keyboard shortcuts

Features:
- Rich text toolbar for notebook pages (Bold, Italic, Underline, Headings, Lists)
- Drawing canvas integration in notebook pages (toggle drawing mode)
- Notebook PDF export (client-side print with print CSS)
- Page background rendering (lined, grid, blank, dotted, music, calligraphy)
- Page thumbnails in sidebar with bookmark indicators
- Auto-save with 3-second debounce
- Notebook sharing with classes (isPublic toggle)
- Notebook duplication (copy with all pages)
- 6 pre-built notebook templates (Math, Deutsch, Englisch, Kunst, Musik, Sachkunde)
- Shared notebooks tab (view other teachers' shared notebooks)
- Templates tab with one-click creation
- Keyboard shortcuts (Cmd+N, Cmd+D, Cmd+Shift+N, Cmd+E, Cmd+Shift+A, Cmd+.)
- Student notebook access (role-based UI)
- Role indicator in notebook header (Teacher/Student)
- Onboarding tour expanded to 14 steps
- Dashboard improvements (Today's Schedule, Paper Saved counter, Recent Activity)
- Classes view improvements (student/subject counts, type badges)
- Competence flower improvements (shadow, shimmer, mastery summary)
- Progress entries improvements (mastery distribution chart)
- Global CSS improvements (dark scrollbar, focus-visible, card-hover-glow)
- 60+ new i18n keys (German/English)

Bug Fixes:
- Notebook creation not refreshing list (fixed by calling loadData after creation)
- Missing BarChart3 import in progress-entries-view
- Escaped quotes in JSX className attributes

src/components/keyboard-shortcuts-dialog.tsx

@@ -30,6 +30,10 @@ import {
   MessageSquareText,
   CalendarDays,
   Settings,
+  Palette,
+  FileDown,
+  Archive,
+  ArrowLeft,
 } from 'lucide-react';
 import {
   Dialog,
@@ -120,6 +124,18 @@ export default function KeyboardShortcutsDialog({ open, onOpenChange }: Keyboard
         { keys: ['Esc'], labelKey: 'shortcuts.close_dialog', icon: X },
       ],
     },
+    {
+      titleKey: 'shortcuts.notebooks_drawing',
+      icon: BookOpen,
+      entries: [
+        { keys: ['Cmd/Ctrl', 'N'], labelKey: 'shortcuts.new_notebook', icon: BookOpen },
+        { keys: ['Cmd/Ctrl', 'D'], labelKey: 'shortcuts.drawing', icon: Palette },
+        { keys: ['Cmd/Ctrl', 'Shift', 'N'], labelKey: 'shortcuts.new_page', icon: Plus },
+        { keys: ['Cmd/Ctrl', 'E'], labelKey: 'shortcuts.export_pdf', icon: FileDown },
+        { keys: ['Cmd/Ctrl', 'Shift', 'A'], labelKey: 'shortcuts.archive_toggle', icon: Archive },
+        { keys: ['Cmd/Ctrl', '.'], labelKey: 'shortcuts.close_notebook', icon: ArrowLeft },
+      ],
+    },
   ];
 
   return (