better default agent props & speed & position numeric, not strings

app/models/AgentsModel.js

@@ -43,7 +43,15 @@ class AgentsModel extends WindozModel {
     async getDefaultProps(id){
         const aprops = await this.getProperties(id)
         const defaults={ position: { x:0, y:0, z:0 }, speed: { x:0, y:0, z:0 }}
-        for(const p in aprops) defaults[p] = aprops[p].default 
+        for(const p in aprops) {
+            const prop = aprops[p]
+            if(prop?.type === 'number') {
+                const n = Number(prop.default)
+                defaults[p] = Number.isFinite(n) ? n : 0
+            } else {
+                defaults[p] = prop.default
+            }
+        }
         return(defaults)
     }
 }

app/models/KeyframesModel.js

@@ -38,14 +38,31 @@ class KeyframesModel extends WindozModel {
         )
     }
 
+    #normalizeAxisVector(vec) {
+        if(!vec || typeof(vec) !== 'object') return(null)
+        const axes = ['x', 'y', 'z']
+        const out = {}
+        for(const axis of axes) {
+            const n = Number(vec[axis])
+            if(!Number.isFinite(n)) return(null)
+            out[axis] = n
+        }
+        return(out)
+    }
+
     async save(kfId, data) {
         const kfData = Object.keys(data).map(aid => {
             const { position, speed, ...storeValues} = data[aid].values
+            const gpsPosition = this.#normalizeAxisVector(position)
+            const gpsSpeed = this.#normalizeAxisVector(speed)
+            if(!gpsPosition || !gpsSpeed) {
+                throw(new Error(`Agent ${aid}: position and speed must be numeric vectors`))
+            }
             return({
                 aid: aid,   
                 type: data[aid].type,
                 storeValues: storeValues,
-                gpsValues: { position: data[aid].values.position, speed: data[aid].values.speed }
+                gpsValues: { position: gpsPosition, speed: gpsSpeed },
             })
         })