polish: increase gap between date number and hours pill in calendar cells

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

components/ParkMonthCalendar.tsx

@@ -167,7 +167,7 @@ export function ParkMonthCalendar({ parkId, year, month, monthData, today, timez
                 borderLeft: isToday ? "2px solid var(--color-today-border)" : "none",
                 display: "flex",
                 flexDirection: "column",
-                gap: 4,
+                gap: 8,
               }}>
                 {/* Date number */}
                 <span style={{