Fixed tsc errors and warnings.

frontend/src/components/Map.vue

@@ -50,7 +50,7 @@
       <div class="timeline">
         <Timeline :loading="loading"
                   :points="gpsPoints"
-                  @point-hover="highlightPoint(pointsLayer, $event)" />
+                  @point-hover="onTimelinePointHover" />
       </div>
     </div>
   </main>
@@ -227,6 +227,14 @@ export default {
       this.locationQuery.minId = null
       this.locationQuery.maxId = null
     },
+
+    onTimelinePointHover(point: GPSPoint) {
+      if (!this.pointsLayer) {
+        return
+      }
+
+      this.highlightPoint(this.pointsLayer as VectorLayer, point)
+    },
   },
 
   watch: {

frontend/src/components/Timeline.vue

@@ -12,6 +12,7 @@
 import {
   CategoryScale,
   Chart as ChartJS,
+  type ChartOptions,
   LineElement,
   LinearScale,
   PointElement,
@@ -68,7 +69,7 @@ export default {
       }
     },
 
-    graphOptions() {
+    graphOptions(): any {
       return {
         responsive: true,
         maintainAspectRatio: false,

frontend/src/mixins/Points.vue

@@ -41,8 +41,8 @@ export default {
   data() {
     return {
       metersTolerance: 20,
-      highlightedPointId: null,
-      highlightedFeature: null,
+      highlightedPointId: null as number | null,
+      highlightedFeature: null as Feature | null,
     }
   },
 
@@ -170,8 +170,12 @@ export default {
       })
     },
 
-    highlightPoint(layer: VectorLayer, point: GPSPoint) {
-      const feature = layer.getSource().getClosestFeatureToCoordinate([point.longitude, point.latitude])
+    highlightPoint(layer: VectorLayer | null, point: GPSPoint) {
+      if (!layer) {
+        return
+      }
+
+      const feature = layer.getSource()?.getClosestFeatureToCoordinate([point.longitude, point.latitude])
       if (feature) {
         if (point.id === this.highlightedPointId) {
           return