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>

admin-v2/components/common/Breadcrumbs.tsx

@@ -34,9 +34,9 @@ export function Breadcrumbs() {
         }
       }
     } else {
-      // Check meta modules
+      // Check meta modules (but skip dashboard as it's already added)
       const metaModule = metaModules.find(m => m.href === `/${pathParts[0]}`)
-      if (metaModule) {
+      if (metaModule && metaModule.href !== '/dashboard') {
         items.push({ label: metaModule.name, href: metaModule.href })
       }
     }
@@ -50,7 +50,7 @@ export function Breadcrumbs() {
   return (
     <nav className="flex items-center gap-2 text-sm text-slate-500 mb-4">
       {items.map((item, index) => (
-        <span key={item.href} className="flex items-center gap-2">
+        <span key={`${index}-${item.href}`} className="flex items-center gap-2">
           {index > 0 && (
             <svg className="w-4 h-4 text-slate-300" fill="none" stroke="currentColor" viewBox="0 0 24 24">
               <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M9 5l7 7-7 7" />