I need my current Sngine installation extended with a lightweight in-app shop. The goal is to let members permanently buy digital cosmetics—avatar frames, GIF profile pictures, and background themes—then activate them instantly on their profile. Core scope • Build a “Shop” page that fits Sngine’s default theme. • Products are managed entirely from the admin panel (add, edit, price, publish/unpublish). • One-time purchase grants lifetime access; after payment the item appears in the user’s “Owned” list and becomes selectable in their profile settings. • Integrate Credit/Debit Card (Stripe or similar) and PayPal checkout flows; handle payment callbacks to mark orders paid. (wallet) • Store order history and item ownership in the existing database structure without breaking future Sngine updates. • Clean, commented PHP/JS code so I can maintain it later. Acceptance 1. I can create a new item in admin, set a price, and see it live in the shop. 2. Test accounts can pay with PayPal sandbox and a card, receive a success message, and immediately use the item. (and Wallet) 3. No core Sngine files overwritten; all changes sit in modules or overrides. 4. Delivered within the <€100 budget agreement. If any detail is unclear just message me—happy to clarify quickly so you can quote accurately and finish fast.