added api logic, vitest, minimal testing ui

api/src/scripts/seed.ts

@@ -1,20 +0,0 @@
-// prisma/seed.ts  (optional: creates one demo user + categories)
-import { PrismaClient } from '@prisma/client';
-const db = new PrismaClient();
-async function main() {
-  const user = await db.user.upsert({
-    where: { email: 'demo@user.test' },
-    update: {},
-    create: { email: 'demo@user.test' }
-  });
-  await db.variableCategory.createMany({
-    data: [
-      { userId: user.id, name: 'Groceries', percent: 30, priority: 10 },
-      { userId: user.id, name: 'Gas',       percent: 20, priority: 20 },
-      { userId: user.id, name: 'Fun',       percent: 50, priority: 30 }
-    ],
-    skipDuplicates: true
-  });
-  console.log('Seeded:', user.email);
-}
-main().finally(()=>db.$disconnect());