feat(ui): Frontend MVP — React 19 + AntD 6 + Vite + StaticFS-Wiring

Scaffold und Core-Infrastruktur 1:1 nach enconf-Pattern (netcell-
webpanel/management-ui), reduziert auf EdgeGuard-Scope (kein reseller/
customer-Roles, keine codemirror/extensions). Stack: React 19 + AntD 6
+ TS strict + Vite + TanStack-Query + zustand + react-i18next.

Layout: AppLayout (Sider+Header+Content), Sidebar (Dashboard/Domains),
Header (User-Dropdown + Logout). i18n mit de/en common.json.

Pages: Login (POST /auth/login), Setup-Wizard (POST /setup/complete),
Dashboard (Health-Polling + Statistics), Domains (volles CRUD via
TanStack-Query gegen /domains-API). UpdateBanner-Komponente
(/system/package-versions, alle 5 min poll, /system/upgrade trigger)
ist von Tag 1 wie vom User gefordert eingebaut.

API-Wiring: cmd/edgeguard-api/main.go mountUI() — gin StaticFS für
/usr/share/edgeguard/ui/ (overridebar via EDGEGUARD_UI_DIR), echte
Files werden direkt geserved, alle nicht-API-Pfade fallen via
NoRoute auf index.html für React-Router-SPA. Wenn dist/ fehlt:
HTML-Placeholder mit Build-Hinweis.

Verifiziert: bun install + npx tsc -b strict (0 errors) + bun run
build (12 chunks). End-to-end gegen /tmp/eg-api: / serviert echte
React-index.html, /domains SPA-Fallback, /api/v1/* JSON, /assets/*
direkt, /api/v1/nonexistent korrekt 404.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

management-ui/package.json

@@ -0,0 +1,39 @@
+{
+  "name": "edgeguard-management-ui",
+  "private": true,
+  "version": "0.0.1-dev",
+  "type": "module",
+  "scripts": {
+    "dev": "vite",
+    "build": "tsc -b && vite build",
+    "lint": "eslint .",
+    "preview": "vite preview"
+  },
+  "dependencies": {
+    "@ant-design/icons": "^6.1.0",
+    "@tanstack/react-query": "^5.95.2",
+    "antd": "^6.3.4",
+    "axios": "^1.13.6",
+    "i18next": "^25.10.9",
+    "i18next-browser-languagedetector": "^8.2.1",
+    "react": "^19.2.4",
+    "react-dom": "^19.2.4",
+    "react-i18next": "^16.6.6",
+    "react-router-dom": "^7.13.2",
+    "zustand": "^5.0.12"
+  },
+  "devDependencies": {
+    "@eslint/js": "^9.39.4",
+    "@types/node": "^24.12.2",
+    "@types/react": "^19.2.14",
+    "@types/react-dom": "^19.2.3",
+    "@vitejs/plugin-react": "^6.0.1",
+    "eslint": "^9.39.4",
+    "eslint-plugin-react-hooks": "^7.0.1",
+    "eslint-plugin-react-refresh": "^0.5.2",
+    "globals": "^17.4.0",
+    "typescript": "~5.9.3",
+    "typescript-eslint": "^8.57.0",
+    "vite": "^8.0.1"
+  }
+}