🐛 fix typecheck and cleanup imports

test/api/pots.test.ts

@@ -173,4 +173,26 @@ describe('Pot API', async () => {
       $fetch(`/api/pots/${pot.slug}/participants/${alice.id}`, { method: 'PATCH', body: { paymentLink: 'javascript:alert(1)' } }),
     ).rejects.toMatchObject({ statusCode: 400 })
   })
+
+  it('removes a participant without expenses but blocks removing one with expenses', async () => {
+    const pot = await $fetch('/api/pots', { method: 'POST', body: { name: 'Ski Trip', currency: 'EUR', creatorName: 'Alice' } })
+    const alice = pot.creator
+    const bob = await $fetch(`/api/pots/${pot.slug}/participants`, { method: 'POST', body: { name: 'Bob' } })
+
+    await $fetch(`/api/pots/${pot.slug}/expenses`, {
+      method: 'POST',
+      body: { description: 'Lift pass', amountCents: 1000, payerId: alice.id, participantIds: [alice.id, bob.id] },
+    })
+
+    await expect(
+      $fetch(`/api/pots/${pot.slug}/participants/${bob.id}`, { method: 'DELETE' }),
+    ).rejects.toMatchObject({ statusCode: 409 })
+
+    const carol = await $fetch(`/api/pots/${pot.slug}/participants`, { method: 'POST', body: { name: 'Carol' } })
+    const result = await $fetch(`/api/pots/${pot.slug}/participants/${carol.id}`, { method: 'DELETE' })
+    expect(result.success).toBe(true)
+
+    const fetched = await $fetch(`/api/pots/${pot.slug}`)
+    expect(fetched.participants.map(p => p.id)).not.toContain(carol.id)
+  })
 })