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/static/css/modules/components/editor.css

@@ -0,0 +1,167 @@
+/* ==========================================
+   RICH TEXT EDITOR STYLES
+   WYSIWYG Editor Components
+   ========================================== */
+
+.editor-container {
+  border: 1px solid var(--bp-border);
+  border-radius: 8px;
+  background: var(--bp-surface-elevated);
+  overflow: hidden;
+}
+
+.editor-toolbar {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 4px;
+  padding: 8px 12px;
+  border-bottom: 1px solid var(--bp-border);
+  background: var(--bp-surface);
+}
+
+.editor-toolbar-group {
+  display: flex;
+  gap: 2px;
+  padding-right: 8px;
+  margin-right: 8px;
+  border-right: 1px solid var(--bp-border);
+}
+
+.editor-toolbar-group:last-child {
+  border-right: none;
+  margin-right: 0;
+  padding-right: 0;
+}
+
+.editor-btn {
+  padding: 6px 10px;
+  border: none;
+  background: transparent;
+  color: var(--bp-text);
+  cursor: pointer;
+  border-radius: 4px;
+  font-size: 13px;
+  font-weight: 500;
+  transition: all 0.2s ease;
+  min-width: 32px;
+}
+
+.editor-btn:hover {
+  background: var(--bp-border-subtle);
+}
+
+.editor-btn.active {
+  background: var(--bp-primary);
+  color: white;
+}
+
+.editor-btn-upload {
+  background: var(--bp-primary);
+  color: white;
+  padding: 6px 12px;
+}
+
+.editor-btn-upload:hover {
+  filter: brightness(1.1);
+}
+
+.editor-content {
+  min-height: 300px;
+  max-height: 500px;
+  overflow-y: auto;
+  padding: 16px;
+  color: var(--bp-text);
+  line-height: 1.6;
+}
+
+.editor-content:focus {
+  outline: none;
+}
+
+.editor-content[contenteditable="true"] {
+  cursor: text;
+}
+
+.editor-content h1 {
+  font-size: 24px;
+  font-weight: 700;
+  margin: 0 0 16px 0;
+}
+
+.editor-content h2 {
+  font-size: 20px;
+  font-weight: 600;
+  margin: 24px 0 12px 0;
+}
+
+.editor-content h3 {
+  font-size: 17px;
+  font-weight: 600;
+  margin: 20px 0 10px 0;
+}
+
+.editor-content p {
+  margin: 0 0 12px 0;
+}
+
+.editor-content ul, .editor-content ol {
+  margin: 0 0 12px 0;
+  padding-left: 24px;
+}
+
+.editor-content li {
+  margin-bottom: 4px;
+}
+
+.editor-content strong {
+  font-weight: 600;
+}
+
+.editor-content em {
+  font-style: italic;
+}
+
+.editor-content a {
+  color: var(--bp-primary);
+  text-decoration: underline;
+}
+
+.editor-content blockquote {
+  border-left: 3px solid var(--bp-primary);
+  margin: 16px 0;
+  padding: 8px 16px;
+  background: var(--bp-surface);
+  font-style: italic;
+}
+
+.editor-content hr {
+  border: none;
+  border-top: 1px solid var(--bp-border);
+  margin: 20px 0;
+}
+
+.word-upload-input {
+  display: none;
+}
+
+.editor-status {
+  padding: 8px 12px;
+  font-size: 12px;
+  color: var(--bp-text-muted);
+  border-top: 1px solid var(--bp-border);
+  background: var(--bp-surface);
+}
+
+/* Light Mode Overrides */
+[data-theme="light"] .editor-container {
+  border-color: var(--bp-border);
+}
+
+[data-theme="light"] .editor-toolbar {
+  background: var(--bp-bg);
+  border-color: var(--bp-border);
+}
+
+[data-theme="light"] .editor-content {
+  background: var(--bp-surface);
+}