Release 2026w17

Label and accuracy improvements across reporting, billing, banking, trust, and purchasing.

• ✓FixedReporting: Label updates and accuracy improvements for billing widgets and cost disclosure.
• ✓FixedProtected Funds (MK2-7301): Protected Funds Entry Issue — removes mandatory Payment To requirement.
• ✓FixedSystem: Joint Party client consistency and email validation fixes.
• ✓FixedPurchases (MK2-7062): Supplier Credit Note Prefill — auto-populates required fields.
• ✓FixedBanking: Currency updates and ledger accuracy improvements.
• ✓FixedClient/Trust (MK2-7379): Future-Dated Client/Trust Transactions — prevents future-dated postings.