- Create new /lot page with two tabs:
1. LOT: component management (formerly in /admin/pricing)
2. Сопоставления: partnumber ↔ LOT mappings (formerly in Warehouse tab)
- Remove LOT tab from Pricing Admin page
- Remove stock mappings section from Warehouse tab
- Update main menu: LOT link now points to /lot
- Default tab in Pricing Admin changed to Estimate
- Add Lot() handler in web.go
- Add /lot route in main.go
Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>
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