Adds an edit flow to the bet journal — an Edit button per row repurposes the inline
entry form (edit mode), saving via a new UpdatePlacedBetUseCase that preserves the
original placed-at and re-grades the outcome against the result (so a changed
selection/event re-settles). A cancel affordance + an editing banner make the mode
obvious; the submit button switches to "Save changes".
- UpdatePlacedBetUseCase (loads existing for PlacedAt, validates the event, re-grades)
+ IBetJournalService.UpdateAsync + service impl; Journal page edit-mode state +
per-row Edit button; en/ru resx.
- 3 tests: unknown-bet, unknown-event, and preserve-PlacedAt + re-grade.
