Two bugs fixed in "By Games" trip planning mode:
1. Calendar navigation: DateRangePicker now navigates to the selected
game's month when startDate changes externally, instead of staying
on the current month.
2. Date range calculation: Fixed race condition where date range was
calculated before games were loaded. Now updateDateRangeForSelectedGames()
is called after loadSummaryGames() completes.
3. Bonus games: planTrip() now uses the UI-selected 7-day date range
instead of overriding it with just the anchor game dates. This allows
ScenarioBPlanner to find additional games within the trip window.
Added regression tests to verify gameFirst mode includes bonus games.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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