feat: Increase spidering distance for overlapping markers

- Increased nearbyDistance from 40 to 60 pixels for better clickability
- Increased circleSpiralSwitchover from 9 to 12 markers before switching to spiral layout
- Improves user experience when clicking on overlapping APRS packets

🤖 Generated with [Claude Code](https://claude.ai/code)

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

assets/js/map.ts

@@ -571,8 +571,8 @@ let MapAPRSMap = {
     if (typeof window.OverlappingMarkerSpiderfier !== "undefined") {
       self.oms = new window.OverlappingMarkerSpiderfier(self.map, {
         keepSpiderfied: true,
-        nearbyDistance: 40,
-        circleSpiralSwitchover: 9,
+        nearbyDistance: 60,
+        circleSpiralSwitchover: 12,
         legWeight: 2,
       });