Home shrinks from ~200-line codebehind + 100-line markup to a
10-line orchestrator holding a @ref to <PendingBookings/> and
wiring <StatementImport OnImported="RefreshPendingAsync"/> to it.
Also renames IsCanceled -> cancelRequested and clears the Files
dictionary after each import batch.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
