test(scaffold): add skeleton test files for all 7 API endpoints

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

__tests__/api/sprint-tasks.test.ts

@@ -0,0 +1,62 @@
+import { describe, it, expect, vi, beforeEach } from 'vitest'
+
+vi.mock('@/lib/prisma', () => ({
+  prisma: {
+    sprint: {
+      findFirst: vi.fn(),
+    },
+  },
+}))
+
+vi.mock('@/lib/api-auth', () => ({
+  authenticateApiRequest: vi.fn(),
+}))
+
+import { prisma } from '@/lib/prisma'
+import { authenticateApiRequest } from '@/lib/api-auth'
+import { GET as getSprintTasks } from '@/app/api/sprints/[id]/tasks/route'
+
+const mockPrisma = prisma as unknown as {
+  sprint: { findFirst: ReturnType<typeof vi.fn> }
+}
+const mockAuth = authenticateApiRequest as ReturnType<typeof vi.fn>
+
+function makeRequest(sprintId = 'sprint-1', limit?: number): [Request, { params: Promise<{ id: string }> }] {
+  const url = limit
+    ? `http://localhost/api/sprints/${sprintId}/tasks?limit=${limit}`
+    : `http://localhost/api/sprints/${sprintId}/tasks`
+  return [
+    new Request(url, {
+      method: 'GET',
+      headers: { Authorization: 'Bearer test-token' },
+    }),
+    { params: Promise.resolve({ id: sprintId }) },
+  ]
+}
+
+describe('GET /api/sprints/:id/tasks', () => {
+  beforeEach(() => {
+    vi.clearAllMocks()
+  })
+
+  // TC-ST-01
+  it.todo('returns 401 when no token provided')
+
+  // TC-ST-03
+  it.todo('returns 404 when sprint is not accessible')
+
+  // TC-ST-04
+  it.todo('returns 404 for another user\'s sprint')
+
+  // TC-ST-05
+  it.todo('applies default limit of 10 when no limit param given')
+
+  // TC-ST-06
+  it.todo('respects custom limit param')
+
+  // TC-ST-07
+  it.todo('handles limit=1 boundary')
+
+  // TC-ST-08
+  it.todo('returns empty array when sprint has no tasks')
+})