manufacturing and gantt

server/prisma/schema.prisma

@@ -133,6 +133,7 @@ model InventoryItem {
   purchaseOrderLines PurchaseOrderLine[]
   workOrders WorkOrder[]
   workOrderMaterialIssues WorkOrderMaterialIssue[]
+  operations InventoryItemOperation[]
 }
 
 model Warehouse {
@@ -476,6 +477,7 @@ model WorkOrder {
   project           Project? @relation(fields: [projectId], references: [id], onDelete: SetNull)
   warehouse         Warehouse @relation(fields: [warehouseId], references: [id], onDelete: Restrict)
   location          WarehouseLocation @relation(fields: [locationId], references: [id], onDelete: Restrict)
+  operations        WorkOrderOperation[]
   materialIssues    WorkOrderMaterialIssue[]
   completions       WorkOrderCompletion[]
 
@@ -485,6 +487,58 @@ model WorkOrder {
   @@index([warehouseId, createdAt])
 }
 
+model ManufacturingStation {
+  id          String   @id @default(cuid())
+  code        String   @unique
+  name        String
+  description String
+  queueDays   Int      @default(0)
+  isActive    Boolean  @default(true)
+  createdAt   DateTime @default(now())
+  updatedAt   DateTime @updatedAt
+  itemOperations InventoryItemOperation[]
+  workOrderOperations WorkOrderOperation[]
+}
+
+model InventoryItemOperation {
+  id             String   @id @default(cuid())
+  itemId         String
+  stationId      String
+  setupMinutes   Int      @default(0)
+  runMinutesPerUnit Int   @default(0)
+  moveMinutes    Int      @default(0)
+  notes          String
+  position       Int      @default(0)
+  createdAt      DateTime @default(now())
+  updatedAt      DateTime @updatedAt
+  item           InventoryItem @relation(fields: [itemId], references: [id], onDelete: Cascade)
+  station        ManufacturingStation @relation(fields: [stationId], references: [id], onDelete: Restrict)
+
+  @@index([itemId, position])
+  @@index([stationId])
+}
+
+model WorkOrderOperation {
+  id               String   @id @default(cuid())
+  workOrderId      String
+  stationId        String
+  sequence         Int
+  setupMinutes     Int      @default(0)
+  runMinutesPerUnit Int     @default(0)
+  moveMinutes      Int      @default(0)
+  plannedMinutes   Int      @default(0)
+  plannedStart     DateTime
+  plannedEnd       DateTime
+  notes            String
+  createdAt        DateTime @default(now())
+  updatedAt        DateTime @updatedAt
+  workOrder        WorkOrder @relation(fields: [workOrderId], references: [id], onDelete: Cascade)
+  station          ManufacturingStation @relation(fields: [stationId], references: [id], onDelete: Restrict)
+
+  @@index([workOrderId, sequence])
+  @@index([stationId, plannedStart])
+}
+
 model WorkOrderMaterialIssue {
   id              String   @id @default(cuid())
   workOrderId     String