feat(health): service registry loader + seed config (fresh titles)

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

lib/health/registry.js

@@ -0,0 +1,30 @@
+import { readFileSync } from 'node:fs';
+import path from 'node:path';
+import { fileURLToPath } from 'node:url';
+
+const __dirname = path.dirname(fileURLToPath(import.meta.url));
+const CONFIG = path.join(__dirname, '../../config/services.json');
+export const CATEGORY_ORDER = ['agents', 'infrastructure', 'media', 'other'];
+
+let cache = null;
+export function load() {
+  if (!cache) cache = JSON.parse(readFileSync(CONFIG, 'utf8'));
+  return cache;
+}
+export function _reset() { cache = null; }   // tests
+
+export function iconSlug(svc) {
+  return (svc.icon || svc.name).toLowerCase().replace(/[^a-z0-9]+/g, '-').replace(/(^-|-$)/g, '');
+}
+
+export function grouped(services) {
+  const map = new Map();
+  for (const s of services) {
+    const cat = CATEGORY_ORDER.includes(s.category) ? s.category : 'other';
+    if (!map.has(cat)) map.set(cat, []);
+    map.get(cat).push(s);
+  }
+  return [...CATEGORY_ORDER, ...[...map.keys()].filter(c => !CATEGORY_ORDER.includes(c))]
+    .filter(c => map.has(c))
+    .map(category => ({ category, services: map.get(category) }));
+}