feat: member portal Sprint 8 — Member Directory

- GET /my/directory in MyService/MyController with q + interest filters
- Respects directoryVisible; excludes self; never exposes jid/phone
- q searches displayName/hometown/currentLocation (case-insensitive);
  interest filter via array `has`; aggregates top-20 interest filter chips
- BFF route forwards query string
- /my/directory page: server-rendered cards (avatar initials, location, interest tags)
- DirectorySearch client component: debounced search box + toggleable interest chips that drive URL params
- Directory nav item

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

apps/web/app/api/my/directory/route.ts

@@ -0,0 +1,11 @@
+import { jsonResponse, memberApiFetch } from '../../../_lib/api';
+
+export const dynamic = 'force-dynamic';
+
+export async function GET(request: Request): Promise<Response> {
+  const url = new URL(request.url);
+  const qs = url.searchParams.toString();
+  const res = await memberApiFetch(`/my/directory${qs ? `?${qs}` : ''}`);
+  const body = await res.json();
+  return jsonResponse(body, res.status);
+}