Release 2026w15

FeeWise online payments, custom matter cost centre tags, and fixes across billing, banking, and reporting.

• +AddedBanking (MK2-6044): FeeWise Online Payments — enables credit/debit card and bank transfer payments with automatic receipt posting.
• +AddedMatters (MK2-6225): Custom Cost Centre Tags — allows custom matter tagging for enhanced reporting.
• ✓FixedBilling: Invoice total consistency and rate set inheritance fixes.
• ✓FixedBanking: Payment allocation error resolution and overdraw prevention.
• ✓FixedSystem: Disbursement code payee prefill and avatar readability improvements.
• ✓FixedMatters (MK2-7831): Prevent Closing Matters with Balances — enforces balance validation.
• ✓FixedReporting: Multiple fixes for PDF formatting, export accuracy, and intermittent display issues.