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_templates.py

@@ -0,0 +1,109 @@
+"""
+School Management Module - Page Templates.
+
+Enthält Template-Funktionen für Schulverwaltungsseiten.
+"""
+
+from .school_styles import get_school_base_styles
+
+
+SCHOOL_NAV_ITEMS = [
+    {"id": "dashboard", "label": "Dashboard", "href": "/school"},
+    {"id": "attendance", "label": "Anwesenheit", "href": "/school/attendance"},
+    {"id": "grades", "label": "Noten", "href": "/school/grades"},
+    {"id": "timetable", "label": "Stundenplan", "href": "/school/timetable"},
+    {"id": "onboarding", "label": "Eltern", "href": "/school/onboarding"},
+]
+
+SCHOOL_ICONS = {
+    "home": '<svg class="nav-icon" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M3 12l2-2m0 0l7-7 7 7M5 10v10a1 1 0 001 1h3m10-11l2 2m-2-2v10a1 1 0 01-1 1h-3m-6 0a1 1 0 001-1v-4a1 1 0 011-1h2a1 1 0 011 1v4a1 1 0 001 1m-6 0h6"></path></svg>',
+    "users": '<svg class="nav-icon" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M12 4.354a4 4 0 110 5.292M15 21H3v-1a6 6 0 0112 0v1zm0 0h6v-1a6 6 0 00-9-5.197M13 7a4 4 0 11-8 0 4 4 0 018 0z"></path></svg>',
+    "calendar": '<svg class="nav-icon" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M8 7V3m8 4V3m-9 8h10M5 21h14a2 2 0 002-2V7a2 2 0 00-2-2H5a2 2 0 00-2 2v12a2 2 0 002 2z"></path></svg>',
+    "chart": '<svg class="nav-icon" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M9 19v-6a2 2 0 00-2-2H5a2 2 0 00-2 2v6a2 2 0 002 2h2a2 2 0 002-2zm0 0V9a2 2 0 012-2h2a2 2 0 012 2v10m-6 0a2 2 0 002 2h2a2 2 0 002-2m0 0V5a2 2 0 012-2h2a2 2 0 012 2v14a2 2 0 01-2 2h-2a2 2 0 01-2-2z"></path></svg>',
+    "clock": '<svg class="nav-icon" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M12 8v4l3 3m6-3a9 9 0 11-18 0 9 9 0 0118 0z"></path></svg>',
+    "external": '<svg class="nav-icon" fill="none" stroke="currentColor" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M10 6H6a2 2 0 00-2 2v10a2 2 0 002 2h10a2 2 0 002-2v-4M14 4h6m0 0v6m0-6L10 14"></path></svg>',
+}
+
+
+def render_school_sidebar(active_page: str = "dashboard") -> str:
+    """Render the school sidebar navigation."""
+    icon_map = {
+        "dashboard": "home",
+        "attendance": "users",
+        "grades": "chart",
+        "timetable": "clock",
+        "onboarding": "calendar",
+    }
+
+    nav_html = ""
+    for item in SCHOOL_NAV_ITEMS:
+        active_class = "active" if item["id"] == active_page else ""
+        icon = SCHOOL_ICONS.get(icon_map.get(item["id"], "home"), "")
+        nav_html += f'''
+        <a href="{item['href']}" class="nav-item {active_class}">
+          {icon}
+          <span>{item['label']}</span>
+        </a>
+        '''
+
+    return f'''
+    <aside class="sidebar">
+      <div class="logo">
+        <div class="logo-icon">BP</div>
+        <span class="logo-text">Schulverwaltung</span>
+      </div>
+
+      <nav class="nav-section">
+        <div class="nav-section-title">Navigation</div>
+        {nav_html}
+      </nav>
+
+      <nav class="nav-section" style="margin-top: auto;">
+        <div class="nav-section-title">Links</div>
+        <a href="/studio" class="nav-item">
+          {SCHOOL_ICONS['external']}
+          <span>Zurück zum Studio</span>
+        </a>
+        <a href="/meetings" class="nav-item">
+          {SCHOOL_ICONS['users']}
+          <span>Meetings</span>
+        </a>
+      </nav>
+    </aside>
+    '''
+
+
+def render_school_base_page(
+    title: str,
+    content: str,
+    active_page: str = "dashboard",
+    extra_styles: str = "",
+    extra_scripts: str = ""
+) -> str:
+    """Render the base page template for school pages."""
+    return f'''
+    <!DOCTYPE html>
+    <html lang="de">
+    <head>
+      <meta charset="UTF-8">
+      <title>BreakPilot – {title}</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>
+        {get_school_base_styles()}
+        {extra_styles}
+      </style>
+    </head>
+    <body>
+      <div class="app-container">
+        {render_school_sidebar(active_page)}
+        <main class="main-content">
+          {content}
+        </main>
+      </div>
+      <script>
+        {extra_scripts}
+      </script>
+    </body>
+    </html>
+    '''