Harden auth, payments, and frontend against review findings.

Close exploitable gaps in booking/payment flows, enforce token versioning and account checks, gate sensitive payment data, and add middleware plus input validation across admin routes.

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/src/routes/users.ts

@@ -50,6 +50,29 @@ usersRouter.get('/', requireAuth(['admin']), async (c) => {
   return c.json({ users: result });
 });
 
+// Get user statistics (admin) — registered before /:id so "stats" is not parsed as a user id
+usersRouter.get('/stats/overview', requireAuth(['admin']), async (c) => {
+  const totalUsers = await dbGet<any>(
+    (db as any)
+      .select({ count: sql<number>`count(*)` })
+      .from(users)
+  );
+  
+  const adminCount = await dbGet<any>(
+    (db as any)
+      .select({ count: sql<number>`count(*)` })
+      .from(users)
+      .where(eq((users as any).role, 'admin'))
+  );
+  
+  return c.json({
+    stats: {
+      total: totalUsers?.count || 0,
+      admins: adminCount?.count || 0,
+    },
+  });
+});
+
 // Get user by ID (admin or self)
 usersRouter.get('/:id', requireAuth(['admin', 'organizer', 'staff', 'marketing', 'user']), async (c) => {
   const id = c.req.param('id');
@@ -286,27 +309,4 @@ usersRouter.delete('/:id', requireAuth(['admin']), async (c) => {
   }
 });
 
-// Get user statistics (admin)
-usersRouter.get('/stats/overview', requireAuth(['admin']), async (c) => {
-  const totalUsers = await dbGet<any>(
-    (db as any)
-      .select({ count: sql<number>`count(*)` })
-      .from(users)
-  );
-  
-  const adminCount = await dbGet<any>(
-    (db as any)
-      .select({ count: sql<number>`count(*)` })
-      .from(users)
-      .where(eq((users as any).role, 'admin'))
-  );
-  
-  return c.json({
-    stats: {
-      total: totalUsers?.count || 0,
-      admins: adminCount?.count || 0,
-    },
-  });
-});
-
 export default usersRouter;