feat: add LOT creation, auto-save mappings, disable auto warehouse pricelist

- Add LOT creation functionality in pricing admin
  - New API endpoint POST /api/admin/pricing/lots
  - Modal form for creating new LOT with auto-category detection
  - Creates entries in both lot and qt_lot_metadata tables

- Implement auto-save for stock mappings
  - Auto-save on change for partnumber → LOT mappings
  - Visual feedback (orange during save, green on success, red on error)
  - Works in both main mappings table and import suggestions

- Improve stock import suggestions UI
  - Remove "Причина" column from suggestions table
  - Increase LOT and Partnumber column widths to 33% each
  - Better visual balance in the table layout

- Disable automatic warehouse pricelist creation on stock_log import
  - Import now completes at 100% after stock_log update
  - Manual pricelist creation available via UI when needed
  - Faster import process without auto-generation overhead

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

config.example.yaml

@@ -2,7 +2,7 @@
 # Copy this file to config.yaml and update values
 
 server:
-  host: "127.0.0.1"  # Use 0.0.0.0 to listen on all interfaces
+  host: "127.0.0.1"  # Local-only mode
   port: 8084
   mode: "release"  # debug | release
   read_timeout: "30s"
@@ -18,11 +18,6 @@ database:
   max_idle_conns: 5
   conn_max_lifetime: "5m"
 
-auth:
-  jwt_secret: "CHANGE_ME_MIN_32_CHARACTERS_LONG"
-  token_expiry: "24h"
-  refresh_expiry: "168h"  # 7 days
-
 pricing:
   default_method: "weighted_median"  # median | average | weighted_median
   default_period_days: 90