NEXUS POS — BOOKSHOP PAYSTACK FOUNDATION — PHASE 19.10.10
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1. Back up project/database and storage/security folder.
2. Extract the LOCALHOST UPDATE over the Nexus project root or install through Super Admin → Updates.
3. Login to Bookshop as an Administrator and choose the working shop.
4. Open Settings → M-Pesa / Paystack, choose the branch, and configure its test key.
5. Disable Paystack automatic fee pass-through if charging customer fee in Nexus; confirm in settings.
6. Save and test connection. Sandbox STK can be tested under KSh 100.
7. Expect no real sales or settlement effects; this phase intentionally does NOT implement live POS STK.
8. Keep your test/live Paystack secret keys private and back up the storage/security master key.

No manual database import. Tables are created automatically on first use when DB user has CREATE permission.
