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>

website/app/globals.css

@@ -0,0 +1,55 @@
+@tailwind base;
+@tailwind components;
+@tailwind utilities;
+
+@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');
+
+:root {
+  --foreground-rgb: 15, 23, 42;
+  --background-rgb: 255, 255, 255;
+}
+
+body {
+  color: rgb(var(--foreground-rgb));
+  background: rgb(var(--background-rgb));
+  font-family: 'Inter', system-ui, sans-serif;
+}
+
+/* Smooth scrolling */
+html {
+  scroll-behavior: smooth;
+}
+
+/* Selection color */
+::selection {
+  background-color: rgba(14, 165, 233, 0.2);
+}
+
+/* Focus styles */
+*:focus-visible {
+  outline: 2px solid #0ea5e9;
+  outline-offset: 2px;
+}
+
+/* Gradient text utility */
+.gradient-text {
+  background: linear-gradient(135deg, #0ea5e9 0%, #d946ef 100%);
+  -webkit-background-clip: text;
+  -webkit-text-fill-color: transparent;
+  background-clip: text;
+}
+
+/* Card hover effect */
+.card-hover {
+  transition: transform 0.2s ease, box-shadow 0.2s ease;
+}
+
+.card-hover:hover {
+  transform: translateY(-4px);
+  box-shadow: 0 20px 40px -12px rgba(0, 0, 0, 0.1);
+}
+
+/* Button press effect */
+.btn-press:active {
+  transform: scale(0.98);
+}