refactor: asset navbar (#25480)

web/src/lib/components/AssetViewerEvents.svelte

@@ -0,0 +1,30 @@
+<script lang="ts">
+  import { assetViewerManager, type Events } from '$lib/managers/asset-viewer-manager.svelte';
+  import type { EventCallback } from '$lib/utils/base-event-manager.svelte';
+  import { onMount } from 'svelte';
+
+  type Props = {
+    [K in keyof Events as `on${K}`]?: EventCallback<Events, K>;
+  };
+
+  const props: Props = $props();
+  const unsubscribes: Array<() => void> = [];
+
+  onMount(() => {
+    for (const name of Object.keys(props)) {
+      const event = name.slice(2) as keyof Events;
+      const listener = props[name as keyof Props] as EventCallback<Events, typeof event> | undefined;
+      if (!listener) {
+        continue;
+      }
+
+      unsubscribes.push(assetViewerManager.on(event, listener));
+    }
+
+    return () => {
+      for (const unsubscribe of unsubscribes) {
+        unsubscribe();
+      }
+    };
+  });
+</script>