V13-FE-011: finalize search list layout slice

docs/Design/kbx-foundation-v36/tests/unit/kbx-api-contract.spec.ts

@@ -0,0 +1,22 @@
+import { describe, expect, it } from 'vitest'
+import { isKbxProblem, kbxApiCatalog } from '@kbx/contracts'
+
+describe('KBX API contract', () => {
+  it('keeps operation IDs and routes unique', () => {
+    const operations = Object.values(kbxApiCatalog)
+    expect(new Set(operations.map(x => x.id)).size).toBe(operations.length)
+    expect(new Set(operations.map(x => `${x.method} ${x.path}`)).size).toBe(operations.length)
+  })
+
+  it('requires a stable key only for mutation operations', () => {
+    const required = Object.values(kbxApiCatalog).filter(x => x.idempotency === 'required')
+    expect(required.length).toBeGreaterThan(0)
+    expect(required.every(x => x.method !== 'GET')).toBe(true)
+  })
+
+  it('recognizes the public problem discriminator family', () => {
+    for (const type of ['validation','business-rule','conflict','permission','not-found','integration','system']) {
+      expect(isKbxProblem({ type, title: 'test' })).toBe(true)
+    }
+  })
+})