models

App-layer Qt view-models.

Modules:

• bank_book_model –

  Qt item model for bank book tree views (Banking Book / Trading Book).

• interest_rate_model –

  Table model for benchmark interest rates (single-column for Prime, extensible).

• statement_models –

  Qt item models for financial statement tree views.

• transaction_table_model –

  Flat table model for transaction history — O(1) insertion via QTableView.

• yield_curve_model –