feat: member portal Sprint 1 — dashboard with MemberShell layout and TowerUser profile fields

- Add avatar, hometown, currentLocation, interests, language, digestPreference, directoryVisible fields to TowerUser
- Migration: 20260617200000_add_tower_user_profile_fields
- GET /my/dashboard API endpoint with stats (groups, messages, consents)
- BFF route /api/my/dashboard
- MemberShell 3-column layout (220px nav + flex-1 main + 280px rail)
- Dashboard page: hero card, stat cards, group list, interests chips
- Sidebar returns null for /my paths (MemberShell owns the nav)

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

apps/web/app/my/layout.tsx

@@ -0,0 +1,63 @@
+import Link from 'next/link';
+import { getMemberToken } from '../_lib/api';
+import { redirect } from 'next/navigation';
+
+const NAV = [
+  { href: '/my', label: 'Dashboard' },
+  { href: '/my/groups', label: 'My Groups' },
+  { href: '/my/settings', label: 'Settings' },
+];
+
+export default async function MemberLayout({ children }: { children: React.ReactNode }) {
+  const token = await getMemberToken();
+  if (!token) redirect('/onboard');
+
+  return (
+    <div className="flex h-full -m-6 min-h-screen">
+      {/* Left sidebar */}
+      <nav className="w-[220px] shrink-0 bg-white border-r border-gray-200 flex flex-col p-4">
+        <span className="font-bold text-base mb-6 px-2">TOWER</span>
+        <div className="flex flex-col gap-1 flex-1">
+          {NAV.map((item) => (
+            <Link
+              key={item.href}
+              href={item.href}
+              className="rounded-md px-3 py-2 text-sm text-gray-700 hover:bg-gray-100 transition-colors"
+            >
+              {item.label}
+            </Link>
+          ))}
+        </div>
+        <div className="border-t border-gray-200 pt-3 mt-3">
+          <p className="px-3 text-xs text-gray-400 uppercase tracking-wide">Member portal</p>
+        </div>
+      </nav>
+
+      {/* Main content */}
+      <main className="flex-1 overflow-auto p-6 bg-gray-50">
+        {children}
+      </main>
+
+      {/* Right activity rail */}
+      <aside className="w-[280px] shrink-0 bg-white border-l border-gray-200 p-4 hidden lg:block">
+        <p className="text-xs font-semibold text-gray-400 uppercase tracking-wide mb-4">Quick actions</p>
+        <div className="flex flex-col gap-2">
+          <Link
+            href="/my/settings"
+            className="text-sm text-gray-600 hover:text-gray-900 px-3 py-2 rounded-md hover:bg-gray-50"
+          >
+            Privacy settings
+          </Link>
+          <form method="POST" action="/api/my/logout">
+            <button
+              type="submit"
+              className="w-full text-left text-sm text-red-500 hover:text-red-700 px-3 py-2 rounded-md hover:bg-red-50"
+            >
+              Sign out
+            </button>
+          </form>
+        </div>
+      </aside>
+    </div>
+  );
+}