Add FOV cone visualization to map screens; refactor geoMath utility for heading and cone calculations

Have FOV config as it's own thing so it's easier to change the size of the FOV triangle without having to change multiple parts of the maths for it.

Fov triangle needed because for some reason maps doesn't let us have our own fov ??

server/server.js

@@ -4,7 +4,7 @@ const path = require('path');
 
 // --- Configuration ---
 
-const PORT = process.env.PORT || 80;
+const PORT = process.env.PORT || 3000;
 const DATA_DIR = path.join(__dirname, 'data');
 
 // --- Data Helpers ---
@@ -560,7 +560,6 @@ addRoute('GET', '/game-data/:gid', (req, res, params) => {
 // Helper: convert storage cache to API response format
 const toCacheApi = (cache, gid) => ({
     id: cache.CacheId,
-    name: cache.Name || '',
     coordinates: { latitude: cache.Latitude, longitude: cache.Longitude },
     radius: cache.TriggerMeters,
     clue: cache.Title,
@@ -573,7 +572,6 @@ const toCacheApi = (cache, gid) => ({
 // Helper: convert API payload to storage cache format
 const toCacheStorage = (data, cacheId) => ({
     CacheId: cacheId,
-    Name: data.name || data.Name || '',
     Title: data.clue || data.Title || '',
     Latitude: data.latitude != null ? data.latitude : (data.Latitude || 0),
     Longitude: data.longitude != null ? data.longitude : (data.Longitude || 0),