Bug fix: prevent KCL error due to colliding AST execution on project switch (#3205)

* Only run "Execute AST" action if defaultUnit setting changes

* A little more logging and catching anywhere we call video.play()

src/lang/KclSingleton.ts

@@ -224,6 +224,7 @@ export class KclManager {
 
     sceneInfra.modelingSend({ type: 'code edit during sketch' })
     defaultSelectionFilter(programMemory, this.engineCommandManager)
+    await this.engineCommandManager.waitForAllCommands()
 
     if (zoomToFit) {
       let zoomObjectId: string | undefined = ''
@@ -243,6 +244,15 @@ export class KclManager {
           padding: 0.1, // padding around the objects
         },
       })
+      await this.engineCommandManager.sendSceneCommand({
+        type: 'modeling_cmd_req',
+        cmd_id: uuidv4(),
+        cmd: {
+          type: 'zoom_to_fit',
+          object_ids: zoomObjectId ? [zoomObjectId] : [], // leave empty to zoom to all objects
+          padding: 0.1, // padding around the objects
+        },
+      })
     }
 
     this.isExecuting = false