feat(P18B-1,P18B-2): 新增资产流转模型与受控接口

server/prisma/schema.prisma

@@ -60,6 +60,26 @@ enum AssetCardStatus {
   archived
 }
 
+enum InventoryCheckScopeType {
+  all
+  legal_entity
+  cost_center
+  location
+}
+
+enum InventoryCheckStatus {
+  draft
+  counting
+  completed
+}
+
+enum InventoryCheckResult {
+  matched
+  missing
+  extra
+  damaged
+}
+
 enum LeaveDaySession {
   am
   pm
@@ -242,6 +262,9 @@ model Employee {
   purchase_attachments_uploaded PurchaseAttachment[]   @relation("PurchaseAttachmentUploader")
   purchase_order_archives       PurchaseOrderArchive[] @relation("PurchaseOrderArchiveArchivedBy")
   assigned_asset_cards          AssetCard[]            @relation("AssetCardAssignee")
+  asset_assignments             AssetAssignment[]
+  asset_transfers_from          AssetTransfer[]        @relation("AssetTransferFromEmployee")
+  asset_transfers_to            AssetTransfer[]        @relation("AssetTransferToEmployee")
 
   owned_invoices                  InvoicePool[]               @relation("InvoiceOwner")
   uploaded_invoices               InvoicePool[]               @relation("InvoiceUploader")
@@ -715,6 +738,9 @@ model AssetCard {
   cost_center      CostCenter      @relation(fields: [cost_center_id], references: [id], onDelete: Restrict)
   purchase_request PurchaseRequest? @relation(fields: [purchase_request_id], references: [id], onDelete: SetNull)
   assignee         Employee?       @relation("AssetCardAssignee", fields: [assignee_employee_id], references: [id], onDelete: SetNull)
+  assignments      AssetAssignment[]
+  transfers        AssetTransfer[]
+  inventory_items  InventoryCheckItem[]
 
   @@index([category_id], map: "idx_asset_cards_category")
   @@index([legal_entity_id], map: "idx_asset_cards_legal_entity")
@@ -725,6 +751,78 @@ model AssetCard {
   @@map("asset_cards")
 }
 
+model AssetAssignment {
+  id          String    @id @default(uuid()) @db.Uuid
+  asset_id    String    @db.Uuid
+  employee_id String    @db.Uuid
+  assigned_at DateTime  @default(now())
+  returned_at DateTime?
+  note        String?
+
+  asset    AssetCard @relation(fields: [asset_id], references: [id], onDelete: Cascade)
+  employee Employee  @relation(fields: [employee_id], references: [id], onDelete: Restrict)
+
+  @@index([asset_id, returned_at], map: "idx_asset_assignments_asset_open")
+  @@index([employee_id, returned_at], map: "idx_asset_assignments_employee_open")
+  @@map("asset_assignments")
+}
+
+model AssetTransfer {
+  id               String    @id @default(uuid()) @db.Uuid
+  asset_id         String    @db.Uuid
+  from_employee_id String?   @db.Uuid
+  to_employee_id   String?   @db.Uuid
+  from_location    String?
+  to_location      String?
+  transferred_at   DateTime  @default(now())
+  note             String?
+
+  asset          AssetCard  @relation(fields: [asset_id], references: [id], onDelete: Cascade)
+  from_employee  Employee?  @relation("AssetTransferFromEmployee", fields: [from_employee_id], references: [id], onDelete: SetNull)
+  to_employee    Employee?  @relation("AssetTransferToEmployee", fields: [to_employee_id], references: [id], onDelete: SetNull)
+
+  @@index([asset_id, transferred_at], map: "idx_asset_transfers_asset_time")
+  @@index([from_employee_id], map: "idx_asset_transfers_from_employee")
+  @@index([to_employee_id], map: "idx_asset_transfers_to_employee")
+  @@map("asset_transfers")
+}
+
+model InventoryCheck {
+  id           String                  @id @default(uuid()) @db.Uuid
+  check_no     String                  @unique
+  scope_type   InventoryCheckScopeType
+  scope_ref_id String?                 @db.VarChar(200)
+  status       InventoryCheckStatus    @default(draft)
+  started_at   DateTime?
+  completed_at DateTime?
+
+  created_at DateTime @default(now())
+  created_by String?  @db.Uuid
+  updated_at DateTime @updatedAt
+  updated_by String?  @db.Uuid
+
+  items InventoryCheckItem[]
+
+  @@index([status, created_at], map: "idx_inventory_checks_status_created")
+  @@index([scope_type, scope_ref_id], map: "idx_inventory_checks_scope")
+  @@map("inventory_checks")
+}
+
+model InventoryCheckItem {
+  id                 String               @id @default(uuid()) @db.Uuid
+  inventory_check_id String               @db.Uuid
+  asset_id           String               @db.Uuid
+  result             InventoryCheckResult
+  note               String?
+
+  inventory_check InventoryCheck @relation(fields: [inventory_check_id], references: [id], onDelete: Cascade)
+  asset           AssetCard      @relation(fields: [asset_id], references: [id], onDelete: Restrict)
+
+  @@unique([inventory_check_id, asset_id], map: "inventory_check_asset_ux")
+  @@index([asset_id], map: "idx_inventory_check_items_asset")
+  @@map("inventory_check_items")
+}
+
 model ReimbursementForm {
   id                 String              @id @default(uuid()) @db.Uuid
   form_number        String?             @unique