feat: initial zROC project recreation (stubs for large files pending)

- 61 files across zroc-ui/ and zroc-ova/ directories
- Full content written for: config, auth, API layers, CSS, build files,
  OVA scripts, backend routes, charts, hooks, constants
- Stubs in place for: page components, Sidebar, TopBar, docker-compose,
  authentik client, blueprint YAML, packer HCL, workflows, setup wizard

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

zroc-ui/backend/routes/prometheus.js

@@ -0,0 +1,26 @@
+// backend/routes/prometheus.js
+'use strict';
+
+const express = require('express');
+const { createProxyMiddleware } = require('http-proxy-middleware');
+const config = require('../config');
+const { authenticate } = require('../middleware/authenticate');
+
+const router = express.Router();
+
+router.use(authenticate);
+
+const prometheusProxy = createProxyMiddleware({
+  target: config.prometheus_url,
+  changeOrigin: true,
+  pathRewrite: { '^/api/prometheus': '' },
+  on: {
+    error: (err, req, res) => {
+      res.status(502).json({ error: 'Prometheus unreachable', detail: err.message });
+    },
+  },
+});
+
+router.use('/', prometheusProxy);
+
+module.exports = router;