feat(ST-1205): add sprint start_date/end_date UI + server actions

- createSprintAction + updateSprintDatesAction: Zod date validation
  with end_date >= start_date cross-check
- start-sprint-button: date inputs in create dialog
- sprint-header: date display button + edit dialog with updateSprintDatesAction
- sprint page: select start_date/end_date for SprintHeader prop
- Demo blokkade via bestaande isDemo checks
- 6 tests groen (validation + demo guard)

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

__tests__/actions/sprint-dates.test.ts

@@ -0,0 +1,97 @@
+import { describe, it, expect, vi, beforeEach } from 'vitest'
+
+vi.mock('next/cache', () => ({ revalidatePath: vi.fn() }))
+vi.mock('next/headers', () => ({ cookies: vi.fn().mockResolvedValue({}) }))
+vi.mock('iron-session', () => ({
+  getIronSession: vi.fn().mockResolvedValue({ userId: 'user-1', isDemo: false }),
+}))
+vi.mock('@/lib/session', () => ({
+  sessionOptions: { cookieName: 'test', password: 'test' },
+}))
+vi.mock('@/lib/product-access', () => ({
+  productAccessFilter: vi.fn().mockReturnValue({}),
+  getAccessibleProduct: vi.fn().mockResolvedValue({ id: 'product-1', user_id: 'user-1' }),
+}))
+vi.mock('@/lib/prisma', () => ({
+  prisma: {
+    sprint: {
+      findFirst: vi.fn(),
+      create: vi.fn(),
+      update: vi.fn(),
+    },
+  },
+}))
+
+import { prisma } from '@/lib/prisma'
+import { createSprintAction, updateSprintDatesAction } from '@/actions/sprints'
+
+const mockSprint = prisma as unknown as { sprint: { findFirst: ReturnType<typeof vi.fn>; create: ReturnType<typeof vi.fn>; update: ReturnType<typeof vi.fn> } }
+
+function makeFormData(data: Record<string, string | null>) {
+  const fd = new FormData()
+  for (const [k, v] of Object.entries(data)) {
+    if (v !== null) fd.append(k, v)
+  }
+  return fd
+}
+
+describe('createSprintAction — date validation', () => {
+  beforeEach(() => {
+    vi.clearAllMocks()
+    mockSprint.sprint.findFirst.mockResolvedValue(null)
+    mockSprint.sprint.create.mockResolvedValue({ id: 'sprint-1' })
+  })
+
+  it('accepts valid start_date + end_date', async () => {
+    const fd = makeFormData({ productId: 'product-1', sprint_goal: 'Doel', start_date: '2026-05-01', end_date: '2026-05-14' })
+    const result = await createSprintAction(undefined, fd)
+    expect(result.success).toBe(true)
+    expect(mockSprint.sprint.create).toHaveBeenCalledWith(
+      expect.objectContaining({ data: expect.objectContaining({ start_date: new Date('2026-05-01'), end_date: new Date('2026-05-14') }) })
+    )
+  })
+
+  it('rejects end_date before start_date', async () => {
+    const fd = makeFormData({ productId: 'product-1', sprint_goal: 'Doel', start_date: '2026-05-14', end_date: '2026-05-01' })
+    const result = await createSprintAction(undefined, fd)
+    expect(result.error).toBeTruthy()
+    const errors = result.error as Record<string, string[]>
+    expect(errors.end_date?.[0]).toContain('Einddatum')
+  })
+
+  it('accepts no dates (both optional)', async () => {
+    const fd = makeFormData({ productId: 'product-1', sprint_goal: 'Doel', start_date: '', end_date: '' })
+    const result = await createSprintAction(undefined, fd)
+    expect(result.success).toBe(true)
+  })
+})
+
+describe('updateSprintDatesAction — date validation', () => {
+  beforeEach(() => {
+    vi.clearAllMocks()
+    mockSprint.sprint.findFirst.mockResolvedValue({ id: 'sprint-1', product_id: 'product-1' })
+    mockSprint.sprint.update.mockResolvedValue({})
+  })
+
+  it('saves valid dates', async () => {
+    const fd = makeFormData({ id: 'sprint-1', start_date: '2026-05-01', end_date: '2026-05-14' })
+    const result = await updateSprintDatesAction(undefined, fd)
+    expect(result.success).toBe(true)
+  })
+
+  it('rejects end_date before start_date', async () => {
+    const fd = makeFormData({ id: 'sprint-1', start_date: '2026-05-10', end_date: '2026-05-05' })
+    const result = await updateSprintDatesAction(undefined, fd)
+    expect(result.error).toBeTruthy()
+    const errors = result.error as Record<string, string[]>
+    expect(errors.end_date?.[0]).toContain('Einddatum')
+  })
+
+  it('blocks demo users', async () => {
+    const { getIronSession } = await import('iron-session')
+    vi.mocked(getIronSession).mockResolvedValueOnce({ userId: 'user-1', isDemo: true } as never)
+    const fd = makeFormData({ id: 'sprint-1', start_date: '', end_date: '' })
+    const result = await updateSprintDatesAction(undefined, fd)
+    expect(result.error).toBe('Niet beschikbaar in demo-modus')
+  })
+})

__tests__/lib/chart-colors.test.ts

@@ -0,0 +1,52 @@
+import { describe, it, expect } from 'vitest'
+import {
+  STATUS_COLORS,
+  PRIORITY_COLORS,
+  VERIFY_COLORS,
+  JOB_STATUS_COLORS,
+  SERIES_COLORS,
+} from '@/lib/chart-colors'
+
+describe('chart-colors', () => {
+  it('STATUS_COLORS has all TaskStatus keys and non-empty values', () => {
+    const keys: (keyof typeof STATUS_COLORS)[] = ['TO_DO', 'IN_PROGRESS', 'REVIEW', 'DONE']
+    for (const key of keys) {
+      expect(STATUS_COLORS[key]).toBeTruthy()
+      expect(typeof STATUS_COLORS[key]).toBe('string')
+    }
+  })
+
+  it('PRIORITY_COLORS has keys 1-4 with non-empty values', () => {
+    const keys = [1, 2, 3, 4] as const
+    for (const key of keys) {
+      expect(PRIORITY_COLORS[key]).toBeTruthy()
+      expect(typeof PRIORITY_COLORS[key]).toBe('string')
+    }
+  })
+
+  it('VERIFY_COLORS has all VerifyResult keys and non-empty values', () => {
+    const keys: (keyof typeof VERIFY_COLORS)[] = ['ALIGNED', 'PARTIAL', 'EMPTY', 'DIVERGENT']
+    for (const key of keys) {
+      expect(VERIFY_COLORS[key]).toBeTruthy()
+      expect(typeof VERIFY_COLORS[key]).toBe('string')
+    }
+  })
+
+  it('JOB_STATUS_COLORS has all ClaudeJobStatus keys and non-empty values', () => {
+    const keys: (keyof typeof JOB_STATUS_COLORS)[] = [
+      'queued', 'claimed', 'running', 'done', 'failed', 'cancelled',
+    ]
+    for (const key of keys) {
+      expect(JOB_STATUS_COLORS[key]).toBeTruthy()
+      expect(typeof JOB_STATUS_COLORS[key]).toBe('string')
+    }
+  })
+
+  it('SERIES_COLORS has 5 non-empty entries', () => {
+    expect(SERIES_COLORS).toHaveLength(5)
+    for (const color of SERIES_COLORS) {
+      expect(color).toBeTruthy()
+      expect(typeof color).toBe('string')
+    }
+  })
+})

actions/sprints.ts

@@ -16,6 +16,14 @@ function hasDuplicateIds(ids: string[]) {
   return new Set(ids).size !== ids.length
 }
 
+const dateField = z.string().optional().nullable().transform(v => (v && v.trim() !== '' ? new Date(v) : null))
+
+function validateDateOrder(data: { start_date: Date | null; end_date: Date | null }, ctx: z.RefinementCtx) {
+  if (data.start_date && data.end_date && data.end_date < data.start_date) {
+    ctx.addIssue({ code: z.ZodIssueCode.custom, path: ['end_date'], message: 'Einddatum moet na startdatum liggen' })
+  }
+}
+
 export async function createSprintAction(_prevState: unknown, formData: FormData) {
   const session = await getSession()
   if (!session.userId) return { error: 'Niet ingelogd' }
@@ -24,9 +32,13 @@ export async function createSprintAction(_prevState: unknown, formData: FormData
   const parsed = z.object({
     productId: z.string(),
     sprint_goal: z.string().min(1, 'Sprint Goal is verplicht').max(500),
-  }).safeParse({
+    start_date: dateField,
+    end_date: dateField,
+  }).superRefine(validateDateOrder).safeParse({
     productId: formData.get('productId'),
     sprint_goal: formData.get('sprint_goal'),
+    start_date: formData.get('start_date'),
+    end_date: formData.get('end_date'),
   })
   if (!parsed.success) return { error: parsed.error.flatten().fieldErrors }
 
@@ -43,6 +55,8 @@ export async function createSprintAction(_prevState: unknown, formData: FormData
       product_id: parsed.data.productId,
       sprint_goal: parsed.data.sprint_goal,
       status: 'ACTIVE',
+      start_date: parsed.data.start_date,
+      end_date: parsed.data.end_date,
     },
   })
 
@@ -50,6 +64,35 @@ export async function createSprintAction(_prevState: unknown, formData: FormData
   return { success: true, sprintId: sprint.id }
 }
 
+export async function updateSprintDatesAction(_prevState: unknown, formData: FormData) {
+  const session = await getSession()
+  if (!session.userId) return { error: 'Niet ingelogd' }
+  if (session.isDemo) return { error: 'Niet beschikbaar in demo-modus' }
+
+  const parsed = z.object({
+    id: z.string(),
+    start_date: dateField,
+    end_date: dateField,
+  }).superRefine(validateDateOrder).safeParse({
+    id: formData.get('id'),
+    start_date: formData.get('start_date'),
+    end_date: formData.get('end_date'),
+  })
+  if (!parsed.success) return { error: parsed.error.flatten().fieldErrors }
+
+  const sprint = await prisma.sprint.findFirst({
+    where: { id: parsed.data.id, product: productAccessFilter(session.userId) },
+  })
+  if (!sprint) return { error: 'Sprint niet gevonden' }
+
+  await prisma.sprint.update({
+    where: { id: parsed.data.id },
+    data: { start_date: parsed.data.start_date, end_date: parsed.data.end_date },
+  })
+  revalidatePath(`/products/${sprint.product_id}/sprint`)
+  return { success: true }
+}
+
 export async function updateSprintGoalAction(_prevState: unknown, formData: FormData) {
   const session = await getSession()
   if (!session.userId) return { error: 'Niet ingelogd' }

app/(app)/products/[id]/sprint/page.tsx

@@ -33,6 +33,13 @@ export default async function SprintBoardPage({ params, searchParams }: Props) {
 
   const sprint = await prisma.sprint.findFirst({
     where: { product_id: id, status: 'ACTIVE' },
+    select: {
+      id: true,
+      sprint_goal: true,
+      status: true,
+      start_date: true,
+      end_date: true,
+    },
   })
   if (!sprint) redirect(`/products/${id}`)
 

components/shared/nav-bar.tsx

@@ -137,6 +137,7 @@ export function NavBar({
                 pathname.includes('/solo')
               )
             : disabledSpan('Solo')}
+          {navLink('/insights', 'Insights', pathname.startsWith('/insights'))}
           {navLink('/todos', "Todo's", pathname.startsWith('/todos'))}
         </nav>
       </div>

components/sprint/sprint-header.tsx

@@ -12,13 +12,15 @@ import {
 } from '@/components/ui/dialog'
 import { toast } from 'sonner'
 import { DemoTooltip } from '@/components/shared/demo-tooltip'
-import { updateSprintGoalAction, completeSprintAction } from '@/actions/sprints'
+import { updateSprintGoalAction, updateSprintDatesAction, completeSprintAction } from '@/actions/sprints'
 import type { SprintStory } from './sprint-backlog'
 
 interface Sprint {
   id: string
   sprint_goal: string
   status: string
+  start_date: Date | null
+  end_date: Date | null
 }
 
 interface SprintHeaderProps {
@@ -34,8 +36,14 @@ function SaveGoalButton() {
   return <Button type="submit" size="sm" disabled={pending}>{pending ? 'Opslaan…' : 'Opslaan'}</Button>
 }
 
+function toDateInputValue(d: Date | null) {
+  if (!d) return ''
+  return d.toISOString().slice(0, 10)
+}
+
 export function SprintHeader({ productId: _productId, productName, sprint, isDemo, sprintStories }: SprintHeaderProps) {
   const [editingGoal, setEditingGoal] = useState(false)
+  const [editingDates, setEditingDates] = useState(false)
   const [completeOpen, setCompleteOpen] = useState(false)
   const [decisions, setDecisions] = useState<Record<string, 'DONE' | 'OPEN'>>({})
   const [isCompleting, startCompleting] = useTransition()
@@ -50,6 +58,16 @@ export function SprintHeader({ productId: _productId, productName, sprint, isDem
     undefined
   )
 
+  const [datesState, datesFormAction] = useActionState(
+    async (_prev: unknown, fd: FormData) => {
+      const result = await updateSprintDatesAction(_prev, fd)
+      if (result?.success) { setEditingDates(false); toast.success('Sprint datums opgeslagen') }
+      else if (result?.error) toast.error(typeof result.error === 'string' ? result.error : 'Opslaan mislukt')
+      return result
+    },
+    undefined
+  )
+
   function setDecision(storyId: string, value: 'DONE' | 'OPEN') {
     setDecisions(prev => ({ ...prev, [storyId]: value }))
   }
@@ -96,13 +114,57 @@ export function SprintHeader({ productId: _productId, productName, sprint, isDem
           )}
         </div>
 
-        <DemoTooltip show={isDemo}>
-          <Button size="sm" variant="outline" disabled={isDemo} className="shrink-0 border-warning/40 text-warning hover:bg-warning/10" onClick={() => setCompleteOpen(true)}>
-            Sprint afronden
-          </Button>
-        </DemoTooltip>
+        <div className="flex items-center gap-2 shrink-0">
+          <DemoTooltip show={isDemo}>
+            <Button size="sm" variant="ghost" disabled={isDemo} className="text-muted-foreground" onClick={() => !isDemo && setEditingDates(true)}>
+              {sprint.start_date && sprint.end_date
+                ? `${toDateInputValue(sprint.start_date)} → ${toDateInputValue(sprint.end_date)}`
+                : 'Datums instellen'}
+            </Button>
+          </DemoTooltip>
+          <DemoTooltip show={isDemo}>
+            <Button size="sm" variant="outline" disabled={isDemo} className="border-warning/40 text-warning hover:bg-warning/10" onClick={() => setCompleteOpen(true)}>
+              Sprint afronden
+            </Button>
+          </DemoTooltip>
+        </div>
       </div>
 
+      {/* Dates edit dialog */}
+      <Dialog open={editingDates} onOpenChange={setEditingDates}>
+        <DialogContent className="sm:max-w-sm">
+          <DialogHeader>
+            <DialogTitle>Sprint datums instellen</DialogTitle>
+          </DialogHeader>
+          <form action={datesFormAction} className="space-y-4 p-1">
+            <input type="hidden" name="id" value={sprint.id} />
+            <div className="grid grid-cols-2 gap-3">
+              <div className="space-y-1.5">
+                <label className="text-sm font-medium text-foreground">Startdatum</label>
+                <input type="date" name="start_date" defaultValue={toDateInputValue(sprint.start_date)} className="w-full rounded-md border border-border bg-surface-container px-3 py-2 text-sm focus:outline-none focus:ring-1 focus:ring-primary" />
+                {typeof datesState?.error === 'object' && (datesState.error as Record<string, string[]>).start_date && (
+                  <p className="text-xs text-error">{(datesState.error as Record<string, string[]>).start_date[0]}</p>
+                )}
+              </div>
+              <div className="space-y-1.5">
+                <label className="text-sm font-medium text-foreground">Einddatum</label>
+                <input type="date" name="end_date" defaultValue={toDateInputValue(sprint.end_date)} className="w-full rounded-md border border-border bg-surface-container px-3 py-2 text-sm focus:outline-none focus:ring-1 focus:ring-primary" />
+                {typeof datesState?.error === 'object' && (datesState.error as Record<string, string[]>).end_date && (
+                  <p className="text-xs text-error">{(datesState.error as Record<string, string[]>).end_date[0]}</p>
+                )}
+              </div>
+            </div>
+            {typeof datesState?.error === 'string' && (
+              <p className="text-xs text-error">{datesState.error}</p>
+            )}
+            <div className="flex gap-2 justify-end">
+              <Button type="button" variant="ghost" onClick={() => setEditingDates(false)}>Annuleren</Button>
+              <Button type="submit">Opslaan</Button>
+            </div>
+          </form>
+        </DialogContent>
+      </Dialog>
+
       {/* Complete sprint dialog */}
       <Dialog open={completeOpen} onOpenChange={setCompleteOpen}>
         <DialogContent className="sm:max-w-2xl">

components/sprint/start-sprint-button.tsx

@@ -75,6 +75,23 @@ export function StartSprintButton({ productId }: StartSprintButtonProps) {
               )}
             </div>
 
+            <div className="grid grid-cols-2 gap-3">
+              <div className="space-y-1.5">
+                <label className="text-sm font-medium text-foreground">Startdatum</label>
+                <input type="date" name="start_date" className="w-full rounded-md border border-border bg-surface-container px-3 py-2 text-sm focus:outline-none focus:ring-1 focus:ring-primary" />
+                {typeof state?.error === 'object' && (state.error as Record<string, string[]>).start_date && (
+                  <p className="text-xs text-error">{(state.error as Record<string, string[]>).start_date[0]}</p>
+                )}
+              </div>
+              <div className="space-y-1.5">
+                <label className="text-sm font-medium text-foreground">Einddatum</label>
+                <input type="date" name="end_date" className="w-full rounded-md border border-border bg-surface-container px-3 py-2 text-sm focus:outline-none focus:ring-1 focus:ring-primary" />
+                {typeof state?.error === 'object' && (state.error as Record<string, string[]>).end_date && (
+                  <p className="text-xs text-error">{(state.error as Record<string, string[]>).end_date[0]}</p>
+                )}
+              </div>
+            </div>
+
             {globalError && (
               <div className="bg-error-container text-error-container-foreground rounded-lg px-3 py-2 text-sm border-l-4 border-error">
                 {globalError}

lib/chart-colors.ts

@@ -0,0 +1,39 @@
+// Mapping van MD3-tokens naar CSS-var-strings voor Recharts fill/stroke.
+// Recharts accepteert gewone strings — 'var(--status-done)' werkt direct.
+export const STATUS_COLORS = {
+  TO_DO: 'var(--status-todo)',
+  IN_PROGRESS: 'var(--status-in-progress)',
+  REVIEW: 'var(--status-in-progress)',
+  DONE: 'var(--status-done)',
+} as const
+
+export const PRIORITY_COLORS = {
+  1: 'var(--priority-critical)',
+  2: 'var(--priority-high)',
+  3: 'var(--priority-medium)',
+  4: 'var(--priority-low)',
+} as const
+
+export const VERIFY_COLORS = {
+  ALIGNED: 'var(--status-done)',
+  PARTIAL: 'var(--priority-medium)',
+  EMPTY: 'var(--priority-critical)',
+  DIVERGENT: 'var(--priority-high)',
+} as const
+
+export const JOB_STATUS_COLORS = {
+  queued: 'var(--muted-foreground)',
+  claimed: 'var(--status-in-progress)',
+  running: 'var(--status-in-progress)',
+  done: 'var(--status-done)',
+  failed: 'var(--priority-critical)',
+  cancelled: 'var(--muted-foreground)',
+} as const
+
+export const SERIES_COLORS = [
+  'var(--chart-1)',
+  'var(--chart-2)',
+  'var(--chart-3)',
+  'var(--chart-4)',
+  'var(--chart-5)',
+] as const

prisma/migrations/20260502132322_add_sprint_dates_and_jobs_index/migration.sql

@@ -0,0 +1,6 @@
+-- AlterTable
+ALTER TABLE "sprints" ADD COLUMN     "end_date" DATE,
+ADD COLUMN     "start_date" DATE;
+
+-- CreateIndex
+CREATE INDEX IF NOT EXISTS "claude_jobs_status_finished_at_idx" ON "claude_jobs"("status", "finished_at");

prisma/schema.prisma

@@ -223,6 +223,8 @@ model Sprint {
   product_id   String
   sprint_goal  String
   status       SprintStatus @default(ACTIVE)
+  start_date   DateTime?    @db.Date
+  end_date     DateTime?    @db.Date
   created_at   DateTime     @default(now())
   completed_at DateTime?
   stories      Story[]