Fix fulfillment consumables pricing architecture

- Add pricePerUnit field to Supply model for seller pricing
- Fix updateSupplyPrice mutation to update pricePerUnit only
- Separate purchase price (price) from selling price (pricePerUnit)
- Fix GraphQL mutations to include organization field (CREATE/UPDATE_LOGISTICS)
- Update GraphQL types to make Supply.price required again
- Add comprehensive pricing rules to rules-complete.md sections 11.7.5 and 18.8
- Fix supplies-tab.tsx to show debug info and handle user loading

Architecture changes:
• Supply.price = purchase price from supplier (immutable)
• Supply.pricePerUnit = selling price to sellers (mutable by fulfillment)
• Warehouse shows purchase price only (readonly)
• Services shows/edits selling price only

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

prisma/schema.prisma

@@ -203,7 +203,8 @@ model Supply {
   id             String        @id @default(cuid())
   name           String
   description    String?
-  price          Decimal       @db.Decimal(10, 2)
+  price          Decimal       @db.Decimal(10, 2) // Цена закупки у поставщика (не меняется)
+  pricePerUnit   Decimal?      @db.Decimal(10, 2) // Цена продажи селлерам (устанавливается фулфилментом)
   quantity       Int           @default(0)
   unit           String        @default("шт")
   category       String        @default("Расходники")