feat(PBI-63): meerdere sprints per product + EXCLUDED + sprint-switcher (#161)

- Sprint lifecycle: ACTIVE→OPEN, COMPLETED→CLOSED, +ARCHIVED (FAILED behouden)
- TaskStatus: +EXCLUDED (overgeslagen door agent-loop via bestaande TO_DO filter)
- Cookie-gebaseerde actieve sprint per product (lib/active-sprint.ts)
- Route splitsen: /products/[id]/sprint/[sprintId] + /sprint redirect-page
- NavBar: gestapelde product/sprint dropdowns + BUILDING-badge derivatie
- Backlog selectie-modus + nieuwe-sprint-dialog (createSprintWithPbisAction)
- Migratie 20260507210000_sprint_lifecycle: ALTER TYPE RENAME (geen data-rewrite)
- Version bump 1.0.0 → 1.2.0

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

__tests__/actions/sprint-runs.test.ts

@@ -77,7 +77,7 @@ const mockPrisma = prisma as unknown as Mocked
 
 const SPRINT_OK = {
   id: 'sprint-1',
-  status: 'ACTIVE',
+  status: 'OPEN',
   product_id: 'prod-1',
   product: { id: 'prod-1', pr_strategy: 'SPRINT' },
 }
@@ -303,7 +303,7 @@ describe('startSprintRunAction — SPRINT_BATCH', () => {
 
 describe('startSprintRunAction — guards', () => {
   it('weigert wanneer Sprint niet ACTIVE is', async () => {
-    mockPrisma.sprint.findUnique.mockResolvedValue({ ...SPRINT_OK, status: 'COMPLETED' })
+    mockPrisma.sprint.findUnique.mockResolvedValue({ ...SPRINT_OK, status: 'CLOSED' })
 
     const result = await startSprintRunAction({ sprint_id: 'sprint-1' })
     expect(result).toMatchObject({ ok: false, error: 'SPRINT_NOT_ACTIVE' })
@@ -346,7 +346,7 @@ describe('resumeSprintAction', () => {
     expect(result).toMatchObject({ ok: true, sprint_run_id: 'run-2' })
     expect(mockPrisma.sprint.update).toHaveBeenCalledWith({
       where: { id: 'sprint-1' },
-      data: { status: 'ACTIVE', completed_at: null },
+      data: { status: 'OPEN', completed_at: null },
     })
     expect(mockPrisma.story.updateMany).toHaveBeenCalledWith({
       where: { sprint_id: 'sprint-1', status: 'FAILED' },
@@ -359,7 +359,7 @@ describe('resumeSprintAction', () => {
   })
 
   it('weigert als sprint niet FAILED is', async () => {
-    mockPrisma.sprint.findUnique.mockResolvedValue({ ...SPRINT_OK, status: 'ACTIVE' })
+    mockPrisma.sprint.findUnique.mockResolvedValue({ ...SPRINT_OK, status: 'OPEN' })
 
     const result = await resumeSprintAction({ sprint_id: 'sprint-1' })
     expect(result).toMatchObject({ ok: false, error: 'SPRINT_NOT_FAILED' })

__tests__/actions/sprints-cascade.test.ts

@@ -49,7 +49,7 @@ const mockPrisma = prisma as unknown as {
   $transaction: ReturnType<typeof vi.fn>
 }
 
-const SPRINT = { id: 'sprint-1', product_id: 'product-1', status: 'ACTIVE' }
+const SPRINT = { id: 'sprint-1', product_id: 'product-1', status: 'OPEN' }
 
 beforeEach(() => {
   vi.clearAllMocks()

__tests__/actions/story-claim.test.ts

@@ -50,7 +50,7 @@ const mockRequireProductWriter = requireProductWriter as ReturnType<typeof vi.fn
 const mockGetIronSession = getIronSession as ReturnType<typeof vi.fn>
 
 const STORY = { id: 'story-1', product_id: 'product-1', assignee_id: null }
-const SPRINT = { id: 'sprint-1', product_id: 'product-1', status: 'ACTIVE' }
+const SPRINT = { id: 'sprint-1', product_id: 'product-1', status: 'OPEN' }
 
 beforeEach(() => {
   vi.clearAllMocks()