Adding manual adding of credit

Enhance an existing site by implementing manual credit additions and recording of sales and store gains. Add functionality allowing admins to credit users manually, and to log sales revenue and store commissions when items are purchased by the admin. Provide a user-facing view where sellers can track items they listed, see purchase status, and review credited earnings and transaction history. Ensure secure validation, audit logging, pagination for listings, and clear UI elements integrated with the current design and payment ledger.