feat: repair-POS integration, receipt formats, manager overrides, price adjustments

- Add thermal/full-page receipt format toggle (per-device, localStorage)
- Full-page receipt uses clean invoice layout matching repair PDF style
- Settings page reorganized into tabbed sections (Store, Locations, Modules, Receipt, POS Security, Advanced)
- Manager override system: configurable PIN prompt for void, refund, discount, cash in/out
- Discount threshold setting: require manager approval above X%
- Consumable product type: tracked for internal job costing, excluded from POS search, receipts, and customer-facing totals
- Repair line item dialog: product picker dropdown for parts/consumables from inventory
- Repair → POS checkout: load ready-for-pickup tickets into repair_payment transactions with proper tax categories (labor=service, parts=goods)
- Transaction completion auto-updates repair ticket status to picked_up
- POS Repairs dialog with Pickup and New Intake tabs, customer account lookup
- Inline price adjustment on cart items: % off, $ off, or set price with live preview
- Order-level discount button with same three input modes
- Backend: migration 0043 (consumable enum + is_consumable flag), createFromRepairTicket service, ready-for-pickup endpoint
- Fix: backend dev script uses --env-file for turbo compatibility

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

packages/backend/src/db/schema/inventory.ts

@@ -57,6 +57,7 @@ export const products = pgTable('product', {
   isSerialized: boolean('is_serialized').notNull().default(false),
   isRental: boolean('is_rental').notNull().default(false),
   isDualUseRepair: boolean('is_dual_use_repair').notNull().default(false),
+  isConsumable: boolean('is_consumable').notNull().default(false),
   taxCategory: taxCategoryEnum('tax_category').notNull().default('goods'),
   price: numeric('price', { precision: 10, scale: 2 }),
   minPrice: numeric('min_price', { precision: 10, scale: 2 }),

packages/backend/src/db/schema/repairs.ts

@@ -36,6 +36,7 @@ export const repairLineItemTypeEnum = pgEnum('repair_line_item_type', [
   'part',
   'flat_rate',
   'misc',
+  'consumable',
 ])
 
 export const repairConditionInEnum = pgEnum('repair_condition_in', [