fix(app): correctly initialize vec3 inputs in nestedsettings

Closes #32

app/src/lib/settings/NestedSettings.svelte

@@ -56,6 +56,10 @@
       return 0;
     }
 
+    if (Array.isArray(inputValue) && node.type === 'vec3') {
+      return inputValue;
+    }
+
     // If the component is supplied with a default value use that
     if (inputValue !== undefined && typeof inputValue !== 'object') {
       return inputValue;

app/src/lib/sidebar/panels/GraphSource.svelte

@@ -7,7 +7,7 @@
     return JSON.stringify(
       {
         ...g,
-        nodes: g.nodes.map((n: object) => ({ ...n, tmp: undefined }))
+        nodes: g.nodes.map((n: object) => ({ ...n, tmp: undefined, state: undefined }))
       },
       null,
       2