fix: dispose flame graph on unmounted (#20)

Author: LittleSound

packages/devtools/src/app/components/chart/ModuleFlamegraph.vue

@@ -2,7 +2,7 @@
 import type { TreeNodeInput } from 'nanovis'
 import type { ModuleInfo, SessionContext } from '~~/shared/types'
 import { Flamegraph, normalizeTreeNode } from 'nanovis'
-import { computed, defineProps, nextTick, onMounted, ref, shallowRef, useTemplateRef, watch } from 'vue'
+import { computed, defineProps, nextTick, onMounted, onUnmounted, ref, shallowRef, useTemplateRef, watch } from 'vue'
 
 const props = defineProps<{
   info: ModuleInfo
@@ -99,9 +99,10 @@ function disposeFlamegraph() {
 
 onMounted(() => {
   buildFlamegraph()
-  return () => {
-    disposeFlamegraph()
-  }
+})
+
+onUnmounted(() => {
+  disposeFlamegraph()
 })
 
 watch(tree, async () => {