feat(codes): server actions + seed/scripts gebruiken code overal

- actions/tasks.ts: saveTask + createTaskAction (legacy form) gebruiken
  createWithCodeRetry + generateNextTaskCode; persisten product_id
  denormalisatie. P2002 op user-supplied code wordt 422 met fieldError
- actions/pbis.ts + stories.ts: insert-helpers nemen verplichte string;
  update laat code-veld weg uit data wanneer null (kan niet meer leeg
  worden gemaakt nu DB NOT NULL is)
- actions/todos.ts: promoteTodoToPbi/Story genereren expliciet een code
  voor het transactiestart (kan niet binnen $transaction array retryen)
- prisma/seed.ts: per-product task counter geeft elke task een T-N code
- scripts/insert-milestone.ts: createMany berekent maxN voor product
  en assigneert T-{maxN+i+1} per nieuwe task

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

actions/pbis.ts

@@ -68,7 +68,7 @@ export async function createPbiAction(_prevState: unknown, formData: FormData) {
 
   const status = parsed.data.status ? pbiStatusFromApi(parsed.data.status) ?? undefined : undefined
 
-  const insert = (code: string | null) =>
+  const insert = (code: string) =>
     prisma.pbi.create({
       data: {
         product_id: parsed.data.productId,
@@ -156,7 +156,7 @@ export async function updatePbiAction(_prevState: unknown, formData: FormData) {
   await prisma.pbi.update({
     where: { id: parsed.data.id },
     data: {
-      code,
+      ...(code ? { code } : {}),
       title: parsed.data.title,
       description: parsed.data.description ?? null,
       priority: parsed.data.priority,

actions/stories.ts

@@ -80,7 +80,7 @@ export async function createStoryAction(_prevState: unknown, formData: FormData)
   })
   const sort_order = (last?.sort_order ?? 0) + 1.0
 
-  const insert = (code: string | null) =>
+  const insert = (code: string) =>
     prisma.story.create({
       data: {
         pbi_id: parsed.data.pbiId,
@@ -163,7 +163,7 @@ export async function updateStoryAction(_prevState: unknown, formData: FormData)
   await prisma.story.update({
     where: { id: parsed.data.id },
     data: {
-      code,
+      ...(code ? { code } : {}),
       title: parsed.data.title,
       description: parsed.data.description ?? null,
       acceptance_criteria: parsed.data.acceptance_criteria ?? null,

actions/tasks.ts

@@ -10,6 +10,8 @@ import { productAccessFilter } from '@/lib/product-access'
 import { requireProductWriter } from '@/lib/auth'
 import { taskSchema as sharedTaskSchema, type TaskInput } from '@/lib/schemas/task'
 import { updateTaskStatusWithStoryPromotion } from '@/lib/tasks-status-update'
+import { normalizeCode } from '@/lib/code'
+import { createWithCodeRetry, generateNextTaskCode, isCodeUniqueConflict } from '@/lib/code-server'
 
 async function getSession() {
   return getIronSession<SessionData>(await cookies(), sessionOptions)
@@ -47,7 +49,8 @@ export async function saveTask(
     }
   }
 
-  const { title, description, implementation_plan, priority, status } = parsed.data
+  const { title, description, implementation_plan, priority, status, code: rawCode } = parsed.data
+  const inputCode = normalizeCode(rawCode ?? null)
   const scope = productAccessFilter(session.userId)
 
   try {
@@ -91,7 +94,7 @@ export async function saveTask(
 
     const story = await prisma.story.findFirst({
       where: { id: context.storyId, product: scope },
-      select: { sprint_id: true },
+      select: { sprint_id: true, product_id: true },
     })
     if (!story) return { ok: false, code: 403, error: 'forbidden' }
 
@@ -101,24 +104,43 @@ export async function saveTask(
       select: { sort_order: true },
     })
 
-    const task = await prisma.task.create({
-      data: {
-        story_id: context.storyId,
-        sprint_id: story.sprint_id ?? null,
-        title,
-        description: description ?? null,
-        implementation_plan: implementation_plan ?? null,
-        priority,
-        sort_order: (last?.sort_order ?? 0) + 1.0,
-        status: 'TO_DO',
-      },
-      select: { id: true, title: true, status: true },
-    })
+    const productId = story.product_id
+    const sprintId = story.sprint_id ?? null
+    const sortOrder = (last?.sort_order ?? 0) + 1.0
+    const storyId = context.storyId
+
+    const task = await createWithCodeRetry(
+      () => (inputCode ? Promise.resolve(inputCode) : generateNextTaskCode(productId)),
+      (code) =>
+        prisma.task.create({
+          data: {
+            story_id: storyId,
+            product_id: productId,
+            sprint_id: sprintId,
+            code,
+            title,
+            description: description ?? null,
+            implementation_plan: implementation_plan ?? null,
+            priority,
+            sort_order: sortOrder,
+            status: 'TO_DO',
+          },
+          select: { id: true, title: true, status: true },
+        }),
+    )
 
     revalidatePath(`/products/${context.productId}/sprint`)
     revalidatePath(`/products/${context.productId}`)
     return { ok: true, task: { ...task, status: task.status.toString() } }
-  } catch {
+  } catch (e) {
+    if (inputCode && isCodeUniqueConflict(e)) {
+      return {
+        ok: false,
+        code: 422,
+        error: 'validation',
+        fieldErrors: { code: ['Code bestaat al binnen dit product'] },
+      }
+    }
     return { ok: false, code: 500, error: 'server_error' }
   }
 }
@@ -179,17 +201,24 @@ export async function createTaskAction(_prevState: unknown, formData: FormData)
     orderBy: { sort_order: 'desc' },
   })
 
-  const task = await prisma.task.create({
-    data: {
-      story_id: storyId,
-      sprint_id: sprintId || null,
-      title: parsed.data.title,
-      description: parsed.data.description ?? null,
-      priority: parsed.data.priority,
-      sort_order: (last?.sort_order ?? 0) + 1.0,
-      status: 'TO_DO',
-    },
-  })
+  const productId = story.product_id
+  const task = await createWithCodeRetry(
+    () => generateNextTaskCode(productId),
+    (code) =>
+      prisma.task.create({
+        data: {
+          story_id: storyId,
+          product_id: productId,
+          sprint_id: sprintId || null,
+          code,
+          title: parsed.data.title,
+          description: parsed.data.description ?? null,
+          priority: parsed.data.priority,
+          sort_order: (last?.sort_order ?? 0) + 1.0,
+          status: 'TO_DO',
+        },
+      }),
+  )
 
   revalidatePath(`/products/${story.product_id}/sprint/planning`)
   return { success: true, task }

actions/todos.ts

@@ -7,6 +7,7 @@ import { z } from 'zod'
 import { prisma } from '@/lib/prisma'
 import { SessionData, sessionOptions } from '@/lib/session'
 import { productAccessFilter } from '@/lib/product-access'
+import { generateNextPbiCode, generateNextStoryCode } from '@/lib/code-server'
 
 async function getSession() {
   return getIronSession<SessionData>(await cookies(), sessionOptions)
@@ -154,10 +155,13 @@ export async function promoteTodoToPbiAction(_prevState: unknown, formData: Form
     orderBy: { sort_order: 'desc' },
   })
 
+  const pbiCode = await generateNextPbiCode(parsed.data.productId)
+
   await prisma.$transaction([
     prisma.pbi.create({
       data: {
         product_id: parsed.data.productId,
+        code: pbiCode,
         title: parsed.data.title,
         priority: parsed.data.priority,
         sort_order: (last?.sort_order ?? 0) + 1.0,
@@ -209,11 +213,14 @@ export async function promoteTodoToStoryAction(_prevState: unknown, formData: Fo
     orderBy: { sort_order: 'desc' },
   })
 
+  const storyCode = await generateNextStoryCode(pbi.product_id)
+
   await prisma.$transaction([
     prisma.story.create({
       data: {
         pbi_id: parsed.data.pbiId,
         product_id: pbi.product_id,
+        code: storyCode,
         title: parsed.data.title,
         priority: parsed.data.priority,
         sort_order: (last?.sort_order ?? 0) + 1.0,