feat: blue dot + Weather Delay notice for storm-closed parks

- Dot turns blue (instead of green) during weather delay on homepage
- Mobile card "Open today" badge becomes blue "⛈ Weather Delay"
- Park page LiveRidePanel shows a blue "⛈ Weather Delay — all rides currently closed" badge instead of "Not open yet — check back soon"
- Added --color-weather-* CSS variables (blue palette)

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

components/WeekCalendar.tsx

@@ -245,11 +245,9 @@ function ParkRow({
                   width: 7,
                   height: 7,
                   borderRadius: "50%",
-                  background: isClosing ? "var(--color-closing-text)" : "var(--color-open-text)",
+                  background: isWeatherDelay ? "var(--color-weather-text)" : isClosing ? "var(--color-closing-text)" : "var(--color-open-text)",
                   flexShrink: 0,
-                  boxShadow: isClosing
-                    ? "0 0 5px var(--color-closing-text)"
-                    : "0 0 5px var(--color-open-text)",
+                  boxShadow: isWeatherDelay ? "0 0 5px var(--color-weather-text)" : isClosing ? "0 0 5px var(--color-closing-text)" : "0 0 5px var(--color-open-text)",
                 }} />
               )}
             </div>