feat: seed User1 default regular user alongside admin

Adds a second seeded account (User1/123456) so a non-admin login exists by default for testing role-based UI restrictions.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

packages/db/prisma/seed.ts

@@ -20,6 +20,14 @@ async function main() {
 
   console.log("Seed complete: admin user created (username: admin, password: 123456)");
 
+  await prisma.user.upsert({
+    where: { username: "User1" },
+    update: {},
+    create: { username: "User1", password: hashedPassword },
+  });
+
+  console.log("Seed complete: User1 created (username: User1, password: 123456)");
+
   // Seed 5 default staff members — rename these to real staff names in Settings
   const defaultStaff = ["A", "B", "C", "D", "E"];
   for (const name of defaultStaff) {