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/pages/parent_onboarding.py

@@ -0,0 +1,180 @@
+"""
+School Module - Parent Onboarding Page
+QR code landing page for parent registration
+"""
+
+from ..styles import SCHOOL_BASE_STYLES, ONBOARDING_STYLES
+from ..templates import COMMON_SCRIPTS
+
+
+def parent_onboarding() -> str:
+    """Parent onboarding page (QR code landing)"""
+    # Onboarding page uses its own simplified styles without sidebar
+    styles = f"""
+:root {{
+  --bp-primary: #6C1B1B;
+  --bp-bg: #F8F8F8;
+  --bp-surface: #FFFFFF;
+  --bp-text: #4A4A4A;
+  --bp-text-muted: #6B6B6B;
+  --bp-accent: #5ABF60;
+  --bp-border: #E0E0E0;
+}}
+
+* {{ box-sizing: border-box; margin: 0; padding: 0; }}
+
+{ONBOARDING_STYLES}
+"""
+
+    content = '''
+    <div class="onboarding-container">
+      <div class="logo">
+        <div class="logo-icon">BP</div>
+        <span class="logo-text">BreakPilot</span>
+      </div>
+
+      <div id="loading">
+        <div class="spinner"></div>
+        <p>QR-Code wird validiert...</p>
+      </div>
+
+      <div id="content" style="display: none;">
+        <h1>Eltern-Registrierung</h1>
+        <p class="subtitle">Sie wurden eingeladen, sich für die Schulkommunikation zu registrieren.</p>
+
+        <div id="error" class="error" style="display: none;"></div>
+        <div id="success" class="success" style="display: none;"></div>
+
+        <div class="info-card">
+          <div class="info-row">
+            <span class="info-label">Schule</span>
+            <span class="info-value" id="school-name">-</span>
+          </div>
+          <div class="info-row">
+            <span class="info-label">Klasse</span>
+            <span class="info-value" id="class-name">-</span>
+          </div>
+          <div class="info-row">
+            <span class="info-label">Kind</span>
+            <span class="info-value" id="student-name">-</span>
+          </div>
+          <div class="info-row">
+            <span class="info-label">Ihre Rolle</span>
+            <span class="info-value" id="role">Elternteil</span>
+          </div>
+        </div>
+
+        <div class="checkbox-group">
+          <div class="checkbox-item">
+            <input type="checkbox" id="consent-terms" required>
+            <label class="checkbox-label" for="consent-terms">
+              Ich habe die <a href="/terms" target="_blank">Nutzungsbedingungen</a> gelesen und akzeptiere diese.
+            </label>
+          </div>
+          <div class="checkbox-item">
+            <input type="checkbox" id="consent-privacy" required>
+            <label class="checkbox-label" for="consent-privacy">
+              Ich habe die <a href="/privacy" target="_blank">Datenschutzerklärung</a> gelesen und stimme der Verarbeitung meiner Daten zu.
+            </label>
+          </div>
+          <div class="checkbox-item">
+            <input type="checkbox" id="consent-custody" required>
+            <label class="checkbox-label" for="consent-custody">
+              Ich bestätige, dass ich sorgeberechtigt für das oben genannte Kind bin.
+            </label>
+          </div>
+        </div>
+
+        <button class="btn btn-primary" id="submit-btn" onclick="completeOnboarding()" disabled>
+          Registrierung abschließen
+        </button>
+      </div>
+    </div>'''
+
+    scripts = '''
+    <script>
+      const API_BASE = '/api/v1';
+      let tokenData = null;
+
+      const urlParams = new URLSearchParams(window.location.search);
+      const token = urlParams.get('token');
+
+      async function validateToken() {
+        if (!token) {
+          showError('Kein gültiger QR-Code. Bitte scannen Sie den QR-Code erneut.');
+          return;
+        }
+
+        try {
+          const response = await fetch(API_BASE + '/onboarding/validate?token=' + token);
+          const data = await response.json();
+
+          if (!response.ok || !data.valid) {
+            showError('Der QR-Code ist ungültig oder abgelaufen. Bitte wenden Sie sich an den Klassenlehrer.');
+            return;
+          }
+
+          tokenData = data;
+
+          document.getElementById('school-name').textContent = data.school_name;
+          document.getElementById('class-name').textContent = data.class_name;
+          document.getElementById('student-name').textContent = data.student_name;
+          document.getElementById('role').textContent = data.role === 'parent_representative' ? 'Elternvertreter' : 'Elternteil';
+
+          document.getElementById('loading').style.display = 'none';
+          document.getElementById('content').style.display = 'block';
+
+        } catch (error) {
+          showError('Ein Fehler ist aufgetreten. Bitte versuchen Sie es später erneut.');
+        }
+      }
+
+      function showError(message) {
+        document.getElementById('loading').style.display = 'none';
+        document.getElementById('content').style.display = 'block';
+        document.getElementById('error').textContent = message;
+        document.getElementById('error').style.display = 'block';
+      }
+
+      document.querySelectorAll('input[type="checkbox"]').forEach(cb => {
+        cb.addEventListener('change', () => {
+          const allChecked = document.querySelectorAll('input[type="checkbox"]:checked').length === 3;
+          document.getElementById('submit-btn').disabled = !allChecked;
+        });
+      });
+
+      async function completeOnboarding() {
+        const btn = document.getElementById('submit-btn');
+        btn.disabled = true;
+        btn.textContent = 'Wird verarbeitet...';
+
+        try {
+          const returnUrl = encodeURIComponent(window.location.href);
+          window.location.href = '/app/login?return_to=' + returnUrl + '&onboarding=true';
+        } catch (error) {
+          showError('Ein Fehler ist aufgetreten. Bitte versuchen Sie es später erneut.');
+          btn.disabled = false;
+          btn.textContent = 'Registrierung abschließen';
+        }
+      }
+
+      validateToken();
+    </script>'''
+
+    # This page doesn't use the standard base template with sidebar
+    return f'''<!DOCTYPE html>
+<html lang="de">
+<head>
+  <meta charset="UTF-8">
+  <title>BreakPilot – Eltern-Onboarding</title>
+  <meta name="viewport" content="width=device-width, initial-scale=1.0">
+  <link href="https://fonts.googleapis.com/css2?family=Manrope:wght@400;500;600;700&display=swap" rel="stylesheet">
+  <style>
+{styles}
+  </style>
+</head>
+<body>
+  {content}
+  {scripts}
+</body>
+</html>'''