feat(aether): initial commit – self-hosted Cloud, Phasen 1–7

Go-Backend (chi, pgx, golang-migrate) + React/TS-Frontend als PWA.
Enthalten: Auth inkl. OIDC, Dateien mit Versionen und Papierkorb,
Freigaben (Links + intern), WebDAV, Gruppenordner, Admin/Theming,
Volltextsuche mit OCR, eigener PDF-Betrachter und WOPI-Office
(Collabora/OnlyOffice).

Nicht im Repo: deploy/.env (Sitzungsschlüssel, DB- und Admin-Passwort)
sowie alle Daten- und Build-Verzeichnisse – siehe .gitignore.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

frontend/package.json

@@ -0,0 +1,31 @@
+{
+  "name": "aether-frontend",
+  "version": "0.1.0",
+  "private": true,
+  "type": "module",
+  "scripts": {
+    "dev": "vite",
+    "build": "tsc && vite build",
+    "preview": "vite preview",
+    "test": "vitest run",
+    "test:watch": "vitest"
+  },
+  "dependencies": {
+    "@vitejs/plugin-react": "^6.0.2",
+    "pdfjs-dist": "^6.2.108",
+    "react": "^19.2.7",
+    "react-dom": "^19.2.7",
+    "vite": "^8.0.16",
+    "vite-plugin-pwa": "^1.3.0"
+  },
+  "devDependencies": {
+    "@tailwindcss/vite": "^4.3.1",
+    "@testing-library/react": "^16.3.2",
+    "@testing-library/user-event": "^14.6.1",
+    "@types/react": "^19.2.17",
+    "@types/react-dom": "^19.2.3",
+    "tailwindcss": "^4.3.1",
+    "typescript": "^6.0.3",
+    "vitest": "^4.1.9"
+  }
+}