Premium POS Update (Modules 6-10)
================================
Added / upgraded:
1. Advanced Purchase System
   - multi-line purchase items
   - PO number / purchase type
   - approval status
   - partial payment history
   - supplier ledger posting
   - landed cost distribution
   - batch / expiry on purchase lines

2. Advanced Sales / Billing
   - multi-line invoice create/edit
   - hold / park sale
   - draft / quotation modes
   - suspended cart list
   - split payment rows
   - cashier shift open/close
   - quick barcode-driven product select UX
   - variant-aware product labels
   - tax/VAT field
   - coupon / gift card support
   - bundle / BOGO / time discount fields
   - courier / area / delivery charge fields
   - Bangla invoice mode flag

3. Full Supplier Module
   - supplier opening balance / rating / notes / document upload
   - supplier ledger page
   - supplier statement page
   - payment history visibility
   - due/balance reporting through ledger

4. Customer-facing Premium Features
   - wallet balance
   - loyalty points
   - membership no / tier
   - special discount percent
   - SMS opt-in flag
   - WhatsApp invoice share button

5. Bangladesh Integration Ready
   - bKash / Nagad / Rocket settings page
   - SMS gateway settings page
   - Pathao / Steadfast / RedX / eCourier settings page
   - area-based delivery charge fields
   - Bangla invoice language toggle
   - COD/courier reconciliation status field

Important deployment note:
- This environment does not have PDO database drivers enabled, so migrations could not be executed here.
- Run on your server:
    php artisan migrate --force
- Then test:
    /admin/purchases/create
    /admin/sales/create
    /admin/sales-holds
    /admin/cashier-shifts
    /admin/settings/integrations
