The three unmatch flows (choice dialog, single-unmatch confirm, bulk review with
optional merchant-rule removal) move to UnmatchDialogs; the transaction display/
matching helpers (transactionTitle/Date, fmtTransactionAmount, isSimilarPayee)
move to a shared transactionDisplay.js used by both the parent and the dialogs.
Dropped now-unused imports (Layers, Checkbox, formatCentsUSD). Behavior-
preserving — BillModal 1432 -> 1193 lines; build + client tests green.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>