chore: cleanup edge and node code

app/src/lib/graph-interface/edges/Edge.svelte

@@ -45,18 +45,17 @@
 
   let mesh = $state<Mesh>();
 
-  let lastId: number | null = null;
-
-  const primeA = 31;
-  const primeB = 37;
+  let lastId: string | null = null;
 
   function update() {
     const new_x = to.x - from.x;
     const new_y = to.y - from.y;
-    const curveId = new_x * primeA + new_y * primeB;
+    const curveId = `${from.x}-${from.y}-${to.x}-${to.y}`;
+
     if (lastId === curveId) {
       return;
     }
+    lastId = curveId;
 
     const length = Math.floor(
       Math.sqrt(Math.pow(new_x, 2) + Math.pow(new_y, 2)) / 4,

app/src/lib/graph-interface/node/Node.svelte

@@ -10,7 +10,6 @@
   import { colors } from "../graph/colors.svelte";
   import { appSettings } from "$lib/settings/app-settings.svelte";
 
-  const graph = getGraphManager();
   const graphState = getGraphState();
 
   type Props = {
@@ -37,14 +36,11 @@
   const height = graphState.getNodeHeight(node.type);
 
   $effect(() => {
-    if (!node?.tmp) node.tmp = {};
-    node.tmp.mesh = meshRef;
-  });
-
-  onMount(() => {
     if (!node.tmp) node.tmp = {};
+    if (meshRef && !node.tmp?.mesh) {
       node.tmp.mesh = meshRef;
       graphState.updateNodePosition(node);
+    }
   });
 </script>