feat: Add detailed user statistics view for admin with QR code list and scan counts

api/routes/admin.js

@@ -24,6 +24,35 @@ router.get('/users', async (req, res) => {
     }
 });
 
+// Get user details (QR codes, scans)
+router.get('/users/:id/details', async (req, res) => {
+    const { id } = req.params;
+    try {
+        // Fetch user info
+        const userRes = await pgPool.query('SELECT id, email, role, created_at FROM users WHERE id = $1', [id]);
+        if (userRes.rows.length === 0) {
+            return res.status(404).json({ error: 'User not found' });
+        }
+        
+        // Fetch QR codes and scan counts
+        const qrRes = await pgPool.query(`
+            SELECT q.id, q.type, q.data_type, q.destination_url, q.short_url_id, q.created_at, q.design_data->>'name' as name,
+                   (SELECT COUNT(*) FROM qr_scans s WHERE s.qr_code_id = q.id) as scan_count
+            FROM qr_codes q
+            WHERE q.user_id = $1
+            ORDER BY q.created_at DESC
+        `, [id]);
+
+        res.json({
+            user: userRes.rows[0],
+            qrCodes: qrRes.rows
+        });
+    } catch (err) {
+        console.error(err);
+        res.status(500).json({ error: 'Server Error fetching user details' });
+    }
+});
+
 // Update a user's tier
 router.put('/users/:id/tier', async (req, res) => {
     const { id } = req.params;

client/src/app/admin/page.tsx

@@ -1,6 +1,7 @@
 'use client';
 import React, { useEffect, useState } from 'react';
 import api from '@/lib/api';
+import UserDetailsModal from '@/components/UserDetailsModal';
 
 interface User {
   id: string;
@@ -12,6 +13,7 @@ interface User {
 export default function AdminPage() {
   const [users, setUsers] = useState<User[]>([]);
   const [loading, setLoading] = useState(true);
+  const [selectedUser, setSelectedUser] = useState<string | null>(null);
 
   const fetchUsers = async () => {
     try {
@@ -63,6 +65,7 @@ export default function AdminPage() {
                   <th className="px-6 py-4 text-xs font-bold text-gray-500 uppercase tracking-widest">Account / Email</th>
                   <th className="px-6 py-4 text-xs font-bold text-gray-500 uppercase tracking-widest">Status / Tier</th>
                   <th className="px-6 py-4 text-xs font-bold text-gray-500 uppercase tracking-widest">Joined</th>
+                  <th className="px-6 py-4 text-xs font-bold text-gray-500 uppercase tracking-widest text-center">Details</th>
                   <th className="px-6 py-4 text-xs font-bold text-gray-500 uppercase tracking-widest text-right">Admin Action</th>
                 </tr>
               </thead>
@@ -89,6 +92,14 @@ export default function AdminPage() {
                     <td className="px-6 py-5 text-sm font-medium text-gray-500">
                       {new Date(user.created_at).toLocaleDateString(undefined, { year: 'numeric', month: 'short', day: 'numeric' })}
                     </td>
+                    <td className="px-6 py-5 text-center">
+                      <button 
+                        onClick={() => setSelectedUser(user.id)}
+                        className="text-indigo-600 hover:text-indigo-800 font-bold text-sm bg-indigo-50 hover:bg-indigo-100 px-3 py-1.5 rounded-lg transition-colors"
+                      >
+                        View Details
+                      </button>
+                    </td>
                     <td className="px-6 py-5 text-right">
                       <select 
                         value={user.role}
@@ -108,6 +119,13 @@ export default function AdminPage() {
           </div>
         )}
       </div>
+
+      {selectedUser && (
+        <UserDetailsModal 
+          userId={selectedUser} 
+          onClose={() => setSelectedUser(null)} 
+        />
+      )}
     </div>
   );
 }

client/src/components/UserDetailsModal.tsx

@@ -0,0 +1,126 @@
+import React, { useEffect, useState } from 'react';
+import api from '@/lib/api';
+
+interface QRCode {
+  id: string;
+  name: string;
+  type: string;
+  data_type: string;
+  destination_url: string;
+  short_url_id: string;
+  created_at: string;
+  scan_count: string;
+}
+
+interface UserDetails {
+  user: {
+    id: string;
+    email: string;
+    role: string;
+    created_at: string;
+  };
+  qrCodes: QRCode[];
+}
+
+interface UserDetailsModalProps {
+  userId: string;
+  onClose: () => void;
+}
+
+export default function UserDetailsModal({ userId, onClose }: UserDetailsModalProps) {
+  const [details, setDetails] = useState<UserDetails | null>(null);
+  const [loading, setLoading] = useState(true);
+
+  useEffect(() => {
+    const fetchDetails = async () => {
+      try {
+        const res = await api.get(`/admin/users/${userId}/details`);
+        setDetails(res.data);
+      } catch (err) {
+        console.error(err);
+      } finally {
+        setLoading(false);
+      }
+    };
+    fetchDetails();
+  }, [userId]);
+
+  if (!userId) return null;
+
+  return (
+    <div className="fixed inset-0 z-50 flex items-center justify-center p-4 bg-gray-900/50 backdrop-blur-sm">
+      <div className="bg-white rounded-2xl shadow-2xl w-full max-w-4xl max-h-[90vh] overflow-hidden flex flex-col">
+        {/* Header */}
+        <div className="flex justify-between items-center p-6 border-b border-gray-100 bg-gray-50">
+          <h2 className="text-xl font-bold text-gray-900">User Details</h2>
+          <button onClick={onClose} className="text-gray-400 hover:text-gray-600 transition-colors">
+            <svg className="w-6 h-6" fill="none" viewBox="0 0 24 24" stroke="currentColor"><path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M6 18L18 6M6 6l12 12" /></svg>
+          </button>
+        </div>
+
+        {/* Content */}
+        <div className="p-6 overflow-y-auto flex-1">
+          {loading ? (
+            <div className="text-center text-gray-500 py-10">Loading details...</div>
+          ) : details ? (
+            <div className="space-y-8">
+              {/* User Info Overview */}
+              <div className="flex items-center gap-4">
+                <div className="w-12 h-12 rounded-full bg-indigo-100 text-indigo-700 flex items-center justify-center text-xl font-bold">
+                  {details.user.email.charAt(0).toUpperCase()}
+                </div>
+                <div>
+                  <h3 className="text-lg font-bold text-gray-900">{details.user.email}</h3>
+                  <div className="flex gap-3 text-sm text-gray-500 mt-1">
+                    <span className="uppercase font-semibold tracking-wider text-indigo-600">{details.user.role.replace('_', ' ')}</span>
+                    <span>&bull;</span>
+                    <span>Joined: {new Date(details.user.created_at).toLocaleDateString()}</span>
+                    <span>&bull;</span>
+                    <span>Total QRs: {details.qrCodes.length}</span>
+                  </div>
+                </div>
+              </div>
+
+              {/* QR Codes List */}
+              <div>
+                <h4 className="text-base font-bold text-gray-900 mb-4 border-b pb-2">Active QR Codes</h4>
+                {details.qrCodes.length === 0 ? (
+                  <p className="text-gray-500 text-sm">This user has not created any QR codes yet.</p>
+                ) : (
+                  <div className="grid grid-cols-1 gap-4">
+                    {details.qrCodes.map(qr => (
+                      <div key={qr.id} className="bg-gray-50 rounded-xl p-4 border border-gray-100 flex justify-between items-center hover:bg-gray-100 transition-colors">
+                        <div>
+                          <div className="font-bold text-gray-900 flex items-center gap-2">
+                            {qr.name || 'Untitled QR'}
+                            <span className="text-[10px] uppercase font-bold px-2 py-0.5 rounded-full bg-indigo-100 text-indigo-700">
+                              {qr.type}
+                            </span>
+                          </div>
+                          <div className="text-xs text-gray-500 mt-1 truncate max-w-md" title={qr.destination_url}>
+                            {qr.destination_url}
+                          </div>
+                          {qr.type === 'dynamic' && qr.short_url_id && (
+                            <div className="text-xs text-indigo-500 mt-1">
+                              /{qr.short_url_id}
+                            </div>
+                          )}
+                        </div>
+                        <div className="text-right">
+                          <div className="text-2xl font-black text-gray-900">{qr.scan_count || 0}</div>
+                          <div className="text-[10px] font-bold text-gray-400 uppercase tracking-widest">Scans</div>
+                        </div>
+                      </div>
+                    ))}
+                  </div>
+                )}
+              </div>
+            </div>
+          ) : (
+            <div className="text-center text-red-500 py-10">Failed to load details.</div>
+          )}
+        </div>
+      </div>
+    </div>
+  );
+}