polish: ride count copy, open indicator, and badge sizing

- "X rides open" → "X rides operating" (desktop + mobile)
- Green glowing dot next to park name when actively operating
- Hours text in calendar cells: larger (0.78rem) and bolder (600)
- Parks open badge: green tint when parks are open, larger text

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

components/ParkCard.tsx

@@ -90,7 +90,7 @@ export function ParkCard({ park, weekDates, parkData, today, openRideCount }: Pa
               fontWeight: 500,
               textAlign: "right",
             }}>
-              {openRideCount} open
+              {openRideCount} {openRideCount === 1 ? "ride" : "rides"} operating
             </div>
           )}
           </div>