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>

backend/frontend/components/admin_panel.py

@@ -0,0 +1,24 @@
+"""
+Admin Panel Component - Legacy Compatibility Wrapper
+
+This file provides backward compatibility for code importing from admin_panel.py.
+All functionality has been moved to the admin_panel/ module.
+
+For new code, import directly from:
+  from frontend.components.admin_panel import get_admin_panel_css
+  from frontend.components.admin_panel import get_admin_panel_html
+  from frontend.components.admin_panel import get_admin_panel_js
+"""
+
+# Re-export all public APIs from the modular structure
+from .admin_panel import (
+    get_admin_panel_css,
+    get_admin_panel_html,
+    get_admin_panel_js,
+)
+
+__all__ = [
+    "get_admin_panel_css",
+    "get_admin_panel_html",
+    "get_admin_panel_js",
+]