Redesign products list and form to match catalog mockups.

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

apps/api/prisma/schema.prisma

@@ -504,9 +504,18 @@ model Product {
   id             String         @id @default(cuid())
   organizationId String
   organization   Organization   @relation(fields: [organizationId], references: [id], onDelete: Cascade)
+  /// product | service
+  kind           String         @default("product")
   name           String
   sku            String?
   description    String?
+  category       String?
+  unit           String?        @default("عدد")
+  stockQty       Int?
+  brand          String?
+  model          String?
+  country        String?
+  tags           String[]       @default([])
   unitPrice      Decimal?       @db.Decimal(18, 2)
   currency       String         @default("IRR")
   isActive       Boolean        @default(true)
@@ -518,6 +527,7 @@ model Product {
 
   @@index([organizationId, name])
   @@index([organizationId, isActive])
+  @@index([organizationId, category])
 }
 
 model DealLineItem {