Feature: Add admin notification system

- Create AdminNotifications server component to fetch notification counts
- Add AdminNotificationsBadge client component to display notifications
- Show badge with total count next to Admin menu in header
- Display breakdown tooltip: pending orders, design approvals, photo requests
- Graceful error handling with fallback to zero notifications
- Integrate into Header component for all pages

Also recreate missing AddressFormSection and OlderOrders components
from previous work that weren't being tracked.

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

src/components/AdminNotifications.tsx

@@ -0,0 +1,36 @@
+import { prisma } from '@/lib/prisma';
+import AdminNotificationsBadge from './AdminNotificationsBadge';
+
+export default async function AdminNotifications() {
+  try {
+    const [
+      pendingOrders,
+      designApprovalsInReview,
+      photoRequests,
+    ] = await Promise.all([
+      prisma.order.count({
+        where: { status: 'PENDING' },
+      }),
+      prisma.designApproval.count({
+        where: { status: 'IN_REVIEW' },
+      }),
+      prisma.customRequest.count({
+        where: { status: 'PENDING' },
+      }),
+    ]);
+
+    const totalNotifications = pendingOrders + designApprovalsInReview + photoRequests;
+
+    return (
+      <AdminNotificationsBadge
+        total={totalNotifications}
+        pendingOrders={pendingOrders}
+        designApprovals={designApprovalsInReview}
+        photoRequests={photoRequests}
+      />
+    );
+  } catch (err) {
+    console.error('Error fetching admin notifications:', err);
+    return <AdminNotificationsBadge total={0} pendingOrders={0} designApprovals={0} photoRequests={0} />;
+  }
+}