feat(solo): previewEnqueueAllAction met blocker-detectie

Voeg previewEnqueueAllAction toe aan actions/claude-jobs.ts: haalt taken op in PBI-volgorde, filtert actieve jobs, detecteert eerste blocker (REVIEW taak of BLOCKED PBI). Retourneert tasks[], blockerIndex en blockerReason. Tests: 7 nieuwe cases voor alle blocker-scenario's en demo-blokkering.

__tests__/actions/claude-jobs.test.ts

@@ -49,6 +49,7 @@ import {
   enqueueClaudeJobAction,
   enqueueAllTodoJobsAction,
   cancelClaudeJobAction,
+  previewEnqueueAllAction,
 } from '@/actions/claude-jobs'
 
 const SESSION_USER = { userId: 'user-1', isDemo: false }
@@ -193,6 +194,107 @@ describe('enqueueAllTodoJobsAction', () => {
   })
 })
 
+const makePbiTask = (id: string, status: string, pbiStatus = 'READY') => ({
+  id,
+  title: `Task ${id}`,
+  status,
+  story: { id: 'story-1', title: 'Story 1', code: 'ST-1', pbi: { id: 'pbi-1', status: pbiStatus, priority: 1, sort_order: 1.0 } },
+})
+
+describe('previewEnqueueAllAction', () => {
+  it('blocks demo user', async () => {
+    mockGetSession.mockResolvedValue(SESSION_DEMO)
+
+    const result = await previewEnqueueAllAction(PRODUCT_ID)
+
+    expect(result).toMatchObject({ error: 'Niet beschikbaar in demo-modus' })
+    expect(mockFindManyTask).not.toHaveBeenCalled()
+  })
+
+  it('returns error when product not accessible', async () => {
+    mockGetSession.mockResolvedValue(SESSION_USER)
+    mockFindFirstProduct.mockResolvedValue(null)
+
+    const result = await previewEnqueueAllAction(PRODUCT_ID)
+
+    expect(result).toMatchObject({ error: 'Geen toegang tot dit product' })
+    expect(mockFindManyTask).not.toHaveBeenCalled()
+  })
+
+  it('returns empty tasks when no active sprint', async () => {
+    mockGetSession.mockResolvedValue(SESSION_USER)
+    mockFindFirstProduct.mockResolvedValue({ id: PRODUCT_ID })
+    mockFindFirstSprint.mockResolvedValue(null)
+
+    const result = await previewEnqueueAllAction(PRODUCT_ID)
+
+    expect(result).toEqual({ tasks: [], blockerIndex: null, blockerReason: null })
+    expect(mockFindManyTask).not.toHaveBeenCalled()
+  })
+
+  it('returns all tasks with no blocker when only TO_DO tasks', async () => {
+    mockGetSession.mockResolvedValue(SESSION_USER)
+    mockFindFirstProduct.mockResolvedValue({ id: PRODUCT_ID })
+    mockFindFirstSprint.mockResolvedValue({ id: 'sprint-1' })
+    mockFindManyTask.mockResolvedValue([
+      makePbiTask('t1', 'TO_DO'),
+      makePbiTask('t2', 'TO_DO'),
+    ])
+
+    const result = await previewEnqueueAllAction(PRODUCT_ID)
+
+    expect(result).toMatchObject({ blockerIndex: null, blockerReason: null })
+    if (!('error' in result)) expect(result.tasks).toHaveLength(2)
+  })
+
+  it('detects REVIEW task as blocker at correct index', async () => {
+    mockGetSession.mockResolvedValue(SESSION_USER)
+    mockFindFirstProduct.mockResolvedValue({ id: PRODUCT_ID })
+    mockFindFirstSprint.mockResolvedValue({ id: 'sprint-1' })
+    mockFindManyTask.mockResolvedValue([
+      makePbiTask('t1', 'TO_DO'),
+      makePbiTask('t2', 'TO_DO'),
+      makePbiTask('t3', 'REVIEW'),
+      makePbiTask('t4', 'TO_DO'),
+    ])
+
+    const result = await previewEnqueueAllAction(PRODUCT_ID)
+
+    expect(result).toMatchObject({ blockerIndex: 2, blockerReason: 'task-review' })
+    if (!('error' in result)) expect(result.tasks).toHaveLength(3)
+  })
+
+  it('detects BLOCKED PBI as blocker at first task of that PBI', async () => {
+    mockGetSession.mockResolvedValue(SESSION_USER)
+    mockFindFirstProduct.mockResolvedValue({ id: PRODUCT_ID })
+    mockFindFirstSprint.mockResolvedValue({ id: 'sprint-1' })
+    mockFindManyTask.mockResolvedValue([
+      makePbiTask('t1', 'TO_DO', 'BLOCKED'),
+      makePbiTask('t2', 'TO_DO', 'BLOCKED'),
+    ])
+
+    const result = await previewEnqueueAllAction(PRODUCT_ID)
+
+    expect(result).toMatchObject({ blockerIndex: 0, blockerReason: 'pbi-blocked' })
+    if (!('error' in result)) expect(result.tasks).toHaveLength(1)
+  })
+
+  it('queries without TO_DO filter to expose REVIEW tasks', async () => {
+    mockGetSession.mockResolvedValue(SESSION_USER)
+    mockFindFirstProduct.mockResolvedValue({ id: PRODUCT_ID })
+    mockFindFirstSprint.mockResolvedValue({ id: 'sprint-1' })
+    mockFindManyTask.mockResolvedValue([])
+
+    await previewEnqueueAllAction(PRODUCT_ID)
+
+    expect(mockFindManyTask).toHaveBeenCalledWith(
+      expect.objectContaining({
+        where: expect.not.objectContaining({ status: 'TO_DO' }),
+      })
+    )
+  })
+})
+
 describe('cancelClaudeJobAction', () => {
   it('happy path: cancels QUEUED job', async () => {
     mockGetSession.mockResolvedValue(SESSION_USER)