[split-required] Split website + studio-v2 monoliths (Phase 3 continued)

Website (14 monoliths split):
- compliance/page.tsx (1,519 → 9), docs/audit (1,262 → 20)
- quality (1,231 → 16), alerts (1,203 → 10), docs (1,202 → 11)
- i18n.ts (1,173 → 8 language files)
- unity-bridge (1,094 → 12), backlog (1,087 → 6)
- training (1,066 → 8), rag (1,063 → 8)
- Deleted index_original.ts (4,899 LOC dead backup)

Studio-v2 (5 monoliths split):
- meet/page.tsx (1,481 → 9), messages (1,166 → 9)
- AlertsB2BContext.tsx (1,165 → 5 modules)
- alerts-b2b/page.tsx (1,019 → 6), korrektur/archiv (1,001 → 6)

All existing imports preserved. Zero new TypeScript errors.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

website/app/admin/docs/audit/_components/TableOfContents.tsx

@@ -0,0 +1,41 @@
+'use client'
+
+/**
+ * Sidebar table of contents for navigating audit documentation sections.
+ */
+
+import { SECTIONS } from '../constants'
+
+interface TableOfContentsProps {
+  activeSection: string
+  onScrollToSection: (sectionId: string) => void
+}
+
+export function TableOfContents({ activeSection, onScrollToSection }: TableOfContentsProps) {
+  return (
+    <aside className="w-64 flex-shrink-0 border-r border-slate-200 bg-slate-50 overflow-y-auto fixed left-64 top-16 bottom-0 z-20">
+      <div className="p-4">
+        <h2 className="text-sm font-semibold text-slate-900 uppercase tracking-wider mb-4">
+          Inhaltsverzeichnis
+        </h2>
+        <nav className="space-y-0.5">
+          {SECTIONS.map((section) => (
+            <button
+              key={section.id}
+              onClick={() => onScrollToSection(section.id)}
+              className={`w-full text-left px-2 py-1.5 text-sm rounded transition-colors ${
+                section.level === 2 ? 'font-medium' : 'ml-3 text-xs'
+              } ${
+                activeSection === section.id
+                  ? 'bg-primary-100 text-primary-700'
+                  : 'text-slate-600 hover:bg-slate-200 hover:text-slate-900'
+              }`}
+            >
+              {section.id.includes('-') ? '' : `${section.id}. `}{section.title}
+            </button>
+          ))}
+        </nav>
+      </div>
+    </aside>
+  )
+}