actions: idea-job triggers + cancel (M12 T-497)

actions/ideas.ts:
- startGrillJobAction(id) — DRAFT/GRILLED/GRILL_FAILED/PLAN_READY → GRILLING;
  validates product+repo_url, idempotency check (active job 409),
  worker-count check (15s freshness), atomic $transaction creates ClaudeJob
  + flips idea.status + IdeaLog{JOB_EVENT}, manual pg_notify
- startMakePlanJobAction(id) — GRILLED/PLAN_FAILED/PLAN_READY → PLANNING;
  same shape via shared startIdeaJob helper
- cancelIdeaJobAction(id) — finds active QUEUED|CLAIMED|RUNNING job for idea,
  reverts status: grill→DRAFT/GRILLED based on grill_md presence;
  plan→GRILLED/PLAN_READY based on plan_md presence

Tests: 31 cases incl. happy path, demo-403, no-product/no-repo-422,
no-worker-422, idempotency-409, status-mismatch-422, cancel revert paths,
404 no-active-job.

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

__tests__/actions/ideas-crud.test.ts

@@ -24,7 +24,16 @@ vi.mock('@/lib/prisma', () => ({
       delete: vi.fn(),
     },
     ideaLog: { create: vi.fn() },
+    claudeJob: {
+      findFirst: vi.fn(),
+      create: vi.fn(),
+      update: vi.fn(),
+    },
+    claudeWorker: {
+      count: vi.fn(),
+    },
     $transaction: vi.fn(),
+    $executeRaw: vi.fn().mockResolvedValue(0),
   },
 }))
 
@@ -37,9 +46,19 @@ import {
   updateGrillMdAction,
   updatePlanMdAction,
   downloadIdeaMdAction,
+  startGrillJobAction,
+  startMakePlanJobAction,
+  cancelIdeaJobAction,
 } from '@/actions/ideas'
 
-type MockIdea = { idea: { create: ReturnType<typeof vi.fn>; findFirst: ReturnType<typeof vi.fn>; update: ReturnType<typeof vi.fn>; delete: ReturnType<typeof vi.fn> }; ideaLog: { create: ReturnType<typeof vi.fn> }; $transaction: ReturnType<typeof vi.fn> }
+type MockIdea = {
+  idea: { create: ReturnType<typeof vi.fn>; findFirst: ReturnType<typeof vi.fn>; update: ReturnType<typeof vi.fn>; delete: ReturnType<typeof vi.fn> }
+  ideaLog: { create: ReturnType<typeof vi.fn> }
+  claudeJob: { findFirst: ReturnType<typeof vi.fn>; create: ReturnType<typeof vi.fn>; update: ReturnType<typeof vi.fn> }
+  claudeWorker: { count: ReturnType<typeof vi.fn> }
+  $transaction: ReturnType<typeof vi.fn>
+  $executeRaw: ReturnType<typeof vi.fn>
+}
 const m = prisma as unknown as MockIdea
 
 beforeEach(() => {
@@ -207,6 +226,138 @@ body
   })
 })
 
+describe('startGrillJobAction', () => {
+  const idea = {
+    id: 'idea-1',
+    status: 'DRAFT',
+    product_id: 'prod-1',
+    product: { id: 'prod-1', repo_url: 'https://github.com/x/y' },
+  }
+
+  beforeEach(() => {
+    m.idea.findFirst.mockResolvedValue(idea)
+    m.claudeJob.findFirst.mockResolvedValue(null)
+    m.claudeWorker.count.mockResolvedValue(1)
+    m.claudeJob.create.mockResolvedValue({ id: 'job-1' })
+  })
+
+  it('happy path: creates IDEA_GRILL job, flips status to GRILLING', async () => {
+    const r = await startGrillJobAction('idea-1')
+    expect(r).toMatchObject({ success: true, data: { job_id: 'job-1' } })
+    expect(m.$executeRaw).toHaveBeenCalled()
+  })
+
+  it('blocks demo-user', async () => {
+    mockSession.isDemo = true
+    const r = await startGrillJobAction('idea-1')
+    expect(r).toMatchObject({ code: 403 })
+    expect(m.claudeJob.create).not.toHaveBeenCalled()
+  })
+
+  it('blocks when product has no repo_url', async () => {
+    m.idea.findFirst.mockResolvedValueOnce({
+      ...idea,
+      product: { id: 'prod-1', repo_url: null },
+    })
+    const r = await startGrillJobAction('idea-1')
+    expect(r).toMatchObject({ code: 422, error: expect.stringMatching(/repo_url/i) })
+  })
+
+  it('blocks when no idea is unlinked', async () => {
+    m.idea.findFirst.mockResolvedValueOnce({ ...idea, product_id: null, product: null })
+    const r = await startGrillJobAction('idea-1')
+    expect(r).toMatchObject({ code: 422 })
+  })
+
+  it('blocks when no worker is active', async () => {
+    m.claudeWorker.count.mockResolvedValueOnce(0)
+    const r = await startGrillJobAction('idea-1')
+    expect(r).toMatchObject({ code: 422, error: expect.stringMatching(/worker/i) })
+    expect(m.claudeJob.create).not.toHaveBeenCalled()
+  })
+
+  it('blocks when an active job already exists (409)', async () => {
+    m.claudeJob.findFirst.mockResolvedValueOnce({ id: 'existing-job' })
+    const r = await startGrillJobAction('idea-1')
+    expect(r).toMatchObject({ code: 409 })
+  })
+
+  it('blocks invalid status (PLANNING)', async () => {
+    m.idea.findFirst.mockResolvedValueOnce({ ...idea, status: 'PLANNING' })
+    const r = await startGrillJobAction('idea-1')
+    expect(r).toMatchObject({ code: 422 })
+  })
+})
+
+describe('startMakePlanJobAction', () => {
+  const idea = {
+    id: 'idea-1',
+    status: 'GRILLED',
+    product_id: 'prod-1',
+    product: { id: 'prod-1', repo_url: 'https://github.com/x/y' },
+  }
+
+  beforeEach(() => {
+    m.idea.findFirst.mockResolvedValue(idea)
+    m.claudeJob.findFirst.mockResolvedValue(null)
+    m.claudeWorker.count.mockResolvedValue(1)
+    m.claudeJob.create.mockResolvedValue({ id: 'job-2' })
+  })
+
+  it('happy: GRILLED → PLANNING', async () => {
+    const r = await startMakePlanJobAction('idea-1')
+    expect(r).toMatchObject({ success: true })
+  })
+
+  it('blocks from DRAFT (must grill first)', async () => {
+    m.idea.findFirst.mockResolvedValueOnce({ ...idea, status: 'DRAFT' })
+    const r = await startMakePlanJobAction('idea-1')
+    expect(r).toMatchObject({ code: 422 })
+  })
+})
+
+describe('cancelIdeaJobAction', () => {
+  it('grill cancel without prior grill_md → DRAFT', async () => {
+    m.idea.findFirst.mockResolvedValueOnce({
+      id: 'idea-1',
+      status: 'GRILLING',
+      grill_md: null,
+      plan_md: null,
+    })
+    m.claudeJob.findFirst.mockResolvedValueOnce({ id: 'job-1', kind: 'IDEA_GRILL' })
+
+    const r = await cancelIdeaJobAction('idea-1')
+    expect(r).toEqual({ success: true })
+    // Verify $transaction was called with 3 ops (job-update, idea-update, log)
+    expect(m.$transaction).toHaveBeenCalled()
+  })
+
+  it('grill re-grill cancel with prior grill_md → GRILLED', async () => {
+    m.idea.findFirst.mockResolvedValueOnce({
+      id: 'idea-1',
+      status: 'GRILLING',
+      grill_md: '# old grill',
+      plan_md: null,
+    })
+    m.claudeJob.findFirst.mockResolvedValueOnce({ id: 'job-1', kind: 'IDEA_GRILL' })
+
+    const r = await cancelIdeaJobAction('idea-1')
+    expect(r).toEqual({ success: true })
+  })
+
+  it('returns 404 when no active job', async () => {
+    m.idea.findFirst.mockResolvedValueOnce({
+      id: 'idea-1',
+      status: 'GRILLED',
+      grill_md: null,
+      plan_md: null,
+    })
+    m.claudeJob.findFirst.mockResolvedValueOnce(null)
+    const r = await cancelIdeaJobAction('idea-1')
+    expect(r).toMatchObject({ code: 404 })
+  })
+})
+
 describe('downloadIdeaMdAction', () => {
   it('returns grill_md when present', async () => {
     m.idea.findFirst.mockResolvedValueOnce({