fix: Restore all files lost during destructive rebase

A previous `git pull --rebase origin main` dropped 177 local commits,
losing 3400+ files across admin-v2, backend, studio-v2, website,
klausur-service, and many other services. The partial restore attempt
(660295e2) only recovered some files.

This commit restores all missing files from pre-rebase ref 98933f5e
while preserving post-rebase additions (night-scheduler, night-mode UI,
NightModeWidget dashboard integration).

Restored features include:
- AI Module Sidebar (FAB), OCR Labeling, OCR Compare
- GPU Dashboard, RAG Pipeline, Magic Help
- Klausur-Korrektur (8 files), Abitur-Archiv (5+ files)
- Companion, Zeugnisse-Crawler, Screen Flow
- Full backend, studio-v2, website, klausur-service
- All compliance SDKs, agent-core, voice-service
- CI/CD configs, documentation, scripts

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

studio-v2/components/worksheet-editor/index.ts

@@ -0,0 +1,15 @@
+/**
+ * Worksheet Editor Components
+ *
+ * Export all worksheet editor components for easy importing
+ */
+
+export { FabricCanvas } from './FabricCanvas'
+export { EditorToolbar } from './EditorToolbar'
+export { PropertiesPanel } from './PropertiesPanel'
+export { AIImageGenerator } from './AIImageGenerator'
+export { CanvasControls } from './CanvasControls'
+export { PageNavigator } from './PageNavigator'
+export { ExportPanel } from './ExportPanel'
+export { DocumentImporter } from './DocumentImporter'
+export { CleanupPanel } from './CleanupPanel'