Bank-matching rules (+ Sync action) and the linked-transaction list (+ Unmatch)
move to LinkedTransactionsSection. The big inline sync onClick is lifted to a
named parent handler (handleSyncBillPayments) sharing a refreshAfterImport helper
with handleRulesChanged. Dropped now-unused imports (BillMerchantRules, Link2,
Link2Off, RefreshCw, transactionDate, fmtTransactionAmount). Behavior-preserving
— BillModal 1193 -> 1105 lines; build + client tests green.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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