fix: can't interact with diagram after switching

previously, if viewing a claim tree or criteria table, then
switching to another topic (or resetting playground), the navigation
store would still assume the topic diagram is in the background.

solution is just to reset navigation store on topic load.

src/web/common/event.ts

@@ -1,6 +1,7 @@
 import { createNanoEvents } from "nanoevents";
 
 import { Node } from "../topic/utils/graph";
+import { resetNavigation } from "../view/navigateStore";
 
 interface Events {
   addNode: (node: Node) => void;
@@ -9,3 +10,8 @@ interface Events {
 }
 
 export const emitter = createNanoEvents<Events>();
+
+// could go elsewhere but don't want to put into Diagram components because they usually aren't rendered before loading
+emitter.on("loadedTopicData", () => {
+  resetNavigation();
+});

src/web/view/navigateStore.ts

@@ -145,3 +145,8 @@ export const goBack = () => {
 export const goForward = () => {
   useNavigateStore.temporal.getState().redo();
 };
+
+export const resetNavigation = () => {
+  useNavigateStore.setState(initialState);
+  useNavigateStore.temporal.getState().clear();
+};