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>

studio-v2/playwright.config.ts

@@ -0,0 +1,60 @@
+import { defineConfig, devices } from '@playwright/test'
+
+/**
+ * Playwright Configuration for Studio v2
+ *
+ * Tests the Lehrer-Frontend (Korrekturplattform)
+ * Run with: npm run test:e2e
+ */
+
+export default defineConfig({
+  testDir: './e2e',
+  fullyParallel: true,
+  forbidOnly: !!process.env.CI,
+  retries: process.env.CI ? 2 : 0,
+  workers: process.env.CI ? 1 : undefined,
+  reporter: [
+    ['html', { outputFolder: 'playwright-report' }],
+    ['list'],
+  ],
+
+  use: {
+    // Base URL for tests - use local dev server or macmini
+    baseURL: process.env.PLAYWRIGHT_BASE_URL || 'http://localhost:3001',
+
+    // Ignore HTTPS errors (needed for self-signed certificates on macmini)
+    ignoreHTTPSErrors: true,
+
+    // Collect trace on failure
+    trace: 'on-first-retry',
+
+    // Screenshot on failure
+    screenshot: 'only-on-failure',
+
+    // Video on failure
+    video: 'on-first-retry',
+  },
+
+  projects: [
+    {
+      name: 'chromium',
+      use: { ...devices['Desktop Chrome'] },
+    },
+    // Uncomment for multi-browser testing
+    // {
+    //   name: 'firefox',
+    //   use: { ...devices['Desktop Firefox'] },
+    // },
+    // {
+    //   name: 'webkit',
+    //   use: { ...devices['Desktop Safari'] },
+    // },
+  ],
+
+  // Run local dev server before tests (optional)
+  // webServer: {
+  //   command: 'npm run dev',
+  //   url: 'http://localhost:3001',
+  //   reuseExistingServer: !process.env.CI,
+  // },
+})