feat: order revision, rial wage from variant, product tags; drop user-app-v2

Admin order edit with category chips and timeline; customer checkout charges variant rialWage; product tags; retire the unused user-app-v2 tree.

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/api/prisma/schema.prisma

@@ -693,6 +693,9 @@ model Product {
   /// Legacy Product.show_type: 1 site, 2 mobile, 3 both.
   showType    Int       @default(3)
   isActive    Boolean   @default(true)
+  /// Labels from Setting `__list__tags`, assigned on the product form. The
+  /// storefront shows them on list cards only (not the product detail page).
+  tags        String[]  @default([])
   createdAt   DateTime  @default(now())
 
   /// Stock of the linked کارساخته as last read from the accounting software
@@ -800,6 +803,12 @@ model ProductVariant {
 // Orders — stock orders (debt-bearing)
 // ─────────────────────────────────────────────────────────────────────────
 
+/// Customer-confirm state for an admin-proposed order edit (not a pipeline status).
+enum OrderRevisionStatus {
+  NONE
+  AWAITING_CUSTOMER
+}
+
 model Order {
   id          String       @id @default(cuid())
   orderNumber String       @unique
@@ -811,6 +820,9 @@ model Order {
   channel     OrderChannel @default(RETAIL)
   status      OrderStatus  @default(PLACED)
 
+  /// Pending admin edit awaiting customer confirm (or admin force/discard).
+  revisionStatus OrderRevisionStatus @default(NONE)
+
   /// Total gold weight incl. wage across all items ("allGram" / order.w).
   totalGoldWeightGrams Decimal @db.Decimal(14, 4)
   /// Pure making-charge weight component (totalGoldWeightGrams minus raw weight sum).
@@ -843,14 +855,48 @@ model Order {
   items                 OrderItem[]
   statusEvents          OrderStatusEvent[]
   ledgerEntries         LedgerEntry[]
+  revisions             OrderRevision[]
   convertedFromPreOrder PreOrder?
 
   @@index([customerId])
   @@index([status])
+  @@index([revisionStatus])
   @@index([salesAgentId])
   @@index([referrerCustomerId])
 }
 
+/// Proposed line-item edit for an Order. Live until applied or discarded.
+/// While pending, Order.revisionStatus = AWAITING_CUSTOMER and charged figures
+/// stay on the current Order until the customer confirms (or admin force-applies).
+model OrderRevision {
+  id      String @id @default(cuid())
+  orderId String
+  order   Order  @relation(fields: [orderId], references: [id], onDelete: Cascade)
+
+  /// Proposed lines: [{ productVariantId, quantity, rashWeightGramsSnapshot,
+  /// wagePercentSnapshot, discountPercentSnapshot, computedWeightGrams, flatRialCharge }]
+  items Json
+
+  totalGoldWeightGrams Decimal @db.Decimal(14, 4)
+  wageWeightGrams      Decimal @db.Decimal(14, 4)
+  flatRialCharge       Decimal @default(0) @db.Decimal(20, 2)
+
+  proposedByAdminId String? @map("proposedByAdminUserId")
+  note              String?
+
+  /// null | ACCEPTED | REJECTED — reject leaves AWAITING_CUSTOMER for admin decision.
+  customerDecision  String?
+  customerDecidedAt DateTime?
+
+  appliedAt   DateTime?
+  discardedAt DateTime?
+
+  createdAt DateTime @default(now())
+
+  @@index([orderId])
+  @@index([createdAt])
+}
+
 model OrderItem {
   id               String         @id @default(cuid())
   orderId          String