Fix movement indicator arrow count assertion to exclude sort header arrows

queryAllByText(/↑|↓/) was matching the active sort column's ↑ indicator.
Narrow to /[↑↓]\d/ so only movement indicators (↑1, ↓1) are counted.

https://claude.ai/code/session_01CuCKFVYbpsKSQoFDcTYfY7

app/components/standings/__tests__/StandingsTable.test.tsx

@@ -151,8 +151,8 @@ describe("StandingsTable", () => {
     it("should not show indicator for no rank change", () => {
       renderWithRouter(<StandingsTable standings={mockStandings} leagueId={mockLeagueId} seasonId={mockSeasonId} />);
 
-      // Only first two teams have rank changes
-      const arrows = screen.queryAllByText(/↑|↓/);
+      // Only first two teams have rank changes; use \d to avoid matching sort-header arrows
+      const arrows = screen.queryAllByText(/[↑↓]\d/);
       expect(arrows).toHaveLength(2);
     });
   });