feat: migrate some more stuff to svelte-5, mainly app settings

app/src/lib/graph-interface/graph/state.svelte.ts

@@ -8,12 +8,7 @@ export function getGraphState() {
 export class GraphState {
 
   activeNodeId = $state(-1);
-
   selectedNodes = $state(new Set<number>());
-  clearSelection() {
-    this.selectedNodes = new Set();
-  }
-
   activeSocket = $state<Socket | null>(null);
   hoveredSocket = $state<Socket | null>(null);
   possibleSockets = $state<Socket[]>([]);
@@ -21,6 +16,10 @@ export class GraphState {
     this.possibleSockets.map((s) => `${s.node.id}-${s.index}`),
   ));
 
+  clearSelection() {
+    this.selectedNodes = new Set();
+  }
+
 }
 
 export { colors } from "./colors";