Fix: Kamera-Zoom bei Klick nicht mehr zu nah

Cluster-Klick Distanzen erhoeht: far 2.000->4.000km, medium 500->1.500km.
trackedEntity auf undefined gesetzt vor selectedEntity (verhindert Auto-Tracking).

static/js/layers/ships.js

@@ -128,6 +128,7 @@ const ShipsLayer = {
             }
             if (best && bestDist < 0.5) {
                 var name = best.name || ('MMSI ' + (best.mmsi || '?'));
+                this._viewer.trackedEntity = undefined;
                 this._viewer.selectedEntity = new Cesium.Entity({
                     name: name,
                     description: '<div style="font-family:monospace;font-size:13px;color:#4499ff;padding:8px">' +
@@ -136,7 +137,7 @@ const ShipsLayer = {
                 });
             }
         } else {
-            this._viewer.camera.flyTo({ destination: Cesium.Cartesian3.fromDegrees(clickLon, clickLat, level === 'far' ? 2000000 : 500000), duration: 1.0 });
+            this._viewer.camera.flyTo({ destination: Cesium.Cartesian3.fromDegrees(clickLon, clickLat, level === "far" ? 4000000 : 1500000), duration: 1.0 });
         }
     },