Add secondary fog clearing zone for player exploration

- Add 50m explore radius that follows player when outside homebase
- Secondary reveal circle only appears when player is outside 800m homebase radius
- Update isInRevealedArea() to check both homebase and player position
- Update fog of war on GPS position changes and after combat
- Geocaches within player's explore radius now become visible

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

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

index.html

@@ -4185,7 +4185,8 @@
         // Fog of War state variables (must be declared before use)
         let fogCanvas = null;
         let fogCtx = null;
-        let playerRevealRadius = 800;
+        let playerRevealRadius = 800;  // Homebase reveal radius (meters)
+        let playerExploreRadius = 50;   // Player's personal reveal radius when exploring (meters)
 
         // Initialize fog of war canvas (directly in map container for simple viewport alignment)
         function initFogOfWar() {
@@ -4260,11 +4261,8 @@
             fogCtx.fillStyle = 'rgba(0, 0, 0, 0.6)';
             fogCtx.fillRect(0, 0, width, height);
 
-            // If no homebase set, full fog
-            if (!playerStats || playerStats.homeBaseLat == null || playerStats.homeBaseLng == null) {
-                return;
-            }
-
+            // Homebase reveal (only if homebase exists)
+            if (playerStats && playerStats.homeBaseLat != null && playerStats.homeBaseLng != null) {
                 // Calculate reveal circle center using container coordinates (viewport-relative)
                 const homeLatLng = L.latLng(playerStats.homeBaseLat, playerStats.homeBaseLng);
                 const centerPoint = map.latLngToContainerPoint(homeLatLng);
@@ -4294,18 +4292,65 @@
                 fogCtx.restore();
             }
 
-        // Check if a location is within the revealed area
+            // Secondary reveal: Player's explore radius when outside homebase
+            if (userLocation) {
+                const playerLatLng = L.latLng(userLocation.lat, userLocation.lng);
+
+                // Check if player is outside homebase radius (or no homebase)
+                let isOutsideHomebase = true;
+                if (playerStats && playerStats.homeBaseLat != null && playerStats.homeBaseLng != null) {
+                    const homeLatLng = L.latLng(playerStats.homeBaseLat, playerStats.homeBaseLng);
+                    const distToHome = playerLatLng.distanceTo(homeLatLng);
+                    isOutsideHomebase = distToHome > playerRevealRadius;
+                }
+
+                if (isOutsideHomebase) {
+                    const playerPoint = map.latLngToContainerPoint(playerLatLng);
+                    const playerEdge = destinationPoint(playerLatLng, playerExploreRadius, 90);
+                    const playerEdgePoint = map.latLngToContainerPoint(playerEdge);
+                    const playerRadiusPixels = Math.abs(playerEdgePoint.x - playerPoint.x);
+
+                    fogCtx.save();
+                    fogCtx.globalCompositeOperation = 'destination-out';
+
+                    const playerGradient = fogCtx.createRadialGradient(
+                        playerPoint.x, playerPoint.y, playerRadiusPixels * 0.85,
+                        playerPoint.x, playerPoint.y, playerRadiusPixels
+                    );
+                    playerGradient.addColorStop(0, 'rgba(0, 0, 0, 1)');
+                    playerGradient.addColorStop(1, 'rgba(0, 0, 0, 0)');
+
+                    fogCtx.beginPath();
+                    fogCtx.arc(playerPoint.x, playerPoint.y, playerRadiusPixels, 0, Math.PI * 2);
+                    fogCtx.fillStyle = playerGradient;
+                    fogCtx.fill();
+
+                    fogCtx.restore();
+                }
+            }
+        }
+
+        // Check if a location is within the revealed area (homebase or player explore radius)
         function isInRevealedArea(lat, lng) {
-            // If no homebase, nothing is revealed
-            if (!playerStats || playerStats.homeBaseLat == null || playerStats.homeBaseLng == null) {
-                return false;
+            const checkPoint = L.latLng(lat, lng);
+
+            // Check homebase radius
+            if (playerStats && playerStats.homeBaseLat != null && playerStats.homeBaseLng != null) {
+                const homeLatLng = L.latLng(playerStats.homeBaseLat, playerStats.homeBaseLng);
+                if (homeLatLng.distanceTo(checkPoint) <= playerRevealRadius) {
+                    return true;
+                }
             }
 
-            // Calculate distance from homebase
-            const distance = L.latLng(playerStats.homeBaseLat, playerStats.homeBaseLng)
-                .distanceTo(L.latLng(lat, lng));
+            // Check player's explore radius
+            if (userLocation) {
+                const playerLatLng = L.latLng(userLocation.lat, userLocation.lng);
+                if (playerLatLng.distanceTo(checkPoint) <= playerExploreRadius) {
+                    return true;
+                }
+            }
 
-            return distance <= playerRevealRadius;
+            return false;
         }
 
         // Hook fog updates to map events (fog will be initialized lazily)
@@ -5586,9 +5631,10 @@
             // Check for monster clear at home base
             checkHomeBaseMonsterClear();
 
-            // Update geocache visibility based on new location
+            // Update geocache visibility and fog of war based on new location
             if (navMode) {
                 updateGeocacheVisibility();
+                updateFogOfWar();
             }
 
             // Update or create marker
@@ -15680,6 +15726,9 @@
             statsSyncState.inCombat = false;
             flushStatsSync();
 
+            // Update fog of war to reflect current position after combat
+            updateFogOfWar();
+
             // If victory music isn't playing, switch to appropriate ambient music
             if (gameMusic.currentTrack !== 'victory' || gameMusic.victory.paused) {
                 const distToHome = getDistanceToHome();