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/school/__init__.py

@@ -0,0 +1,63 @@
+"""
+School Module
+
+Modular structure for the School frontend (Schulverwaltung).
+Matrix-based communication for schools.
+
+Modular Refactoring (2026-02-03):
+- Split into sub-modules for maintainability
+- Original file: school.py (3,732 lines)
+- Now split into: styles.py, templates.py, pages/
+"""
+
+from fastapi import APIRouter
+from fastapi.responses import HTMLResponse
+
+from .pages import (
+    school_dashboard,
+    attendance_page,
+    grades_page,
+    timetable_page,
+    parent_onboarding,
+)
+
+router = APIRouter()
+
+
+# ============================================
+# API Routes
+# ============================================
+
+@router.get("/school", response_class=HTMLResponse)
+def get_school_dashboard():
+    """Main school dashboard"""
+    return school_dashboard()
+
+
+@router.get("/school/attendance", response_class=HTMLResponse)
+def get_attendance_page():
+    """Attendance tracking page"""
+    return attendance_page()
+
+
+@router.get("/school/grades", response_class=HTMLResponse)
+def get_grades_page():
+    """Grades overview page"""
+    return grades_page()
+
+
+@router.get("/school/timetable", response_class=HTMLResponse)
+def get_timetable_page():
+    """Timetable page"""
+    return timetable_page()
+
+
+@router.get("/onboard-parent", response_class=HTMLResponse)
+def get_parent_onboarding():
+    """Parent onboarding page (QR code landing)"""
+    return parent_onboarding()
+
+
+__all__ = [
+    "router",
+]