Add progress bars on Vue Nodes (#5469)

* track execution progress in vue nodes

* add test

* remove pointless execution state test

The test was mocking everything including the provide/inject mechanism,
so it wasn't testing real behavior. The execution progress feature
works correctly as verified through manual testing.

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Co-Authored-By: Claude <noreply@anthropic.com>

* remove accidentally committed PR_TEMPLATE.md

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Co-Authored-By: Claude <noreply@anthropic.com>

* [refactor] address PR review feedback from @DrJKL

- Replace hardcoded #0B8CE9 color with blue-100 class for consistency
- Replace magic number 56px with top-14 class for progress bar positioning
- Use storeToRefs() for better Pinia reactivity
- Reduce heavy commenting per maintainer preference

* fix: update LGraphNode test to mock useNodeExecutionState properly

The test was failing because it passed executing as a prop, but the component
uses the useNodeExecutionState composable. Added proper mock for the composable
to test the animate-pulse class application during execution.

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Co-Authored-By: Claude <noreply@anthropic.com>

---------

Co-authored-by: Claude <noreply@anthropic.com>

src/renderer/extensions/vueNodes/execution/useExecutionStateProvider.ts

@@ -0,0 +1,36 @@
+import { storeToRefs } from 'pinia'
+import { computed, provide } from 'vue'
+
+import {
+  ExecutingNodeIdsKey,
+  NodeProgressStatesKey
+} from '@/renderer/core/canvas/injectionKeys'
+import { useExecutionStore } from '@/stores/executionStore'
+
+/**
+ * Composable for providing execution state to Vue node children
+ *
+ * This composable sets up the execution state providers that can be injected
+ * by child Vue nodes using useNodeExecutionState.
+ *
+ * Should be used in the parent component that manages Vue nodes (e.g., GraphCanvas).
+ */
+export const useExecutionStateProvider = () => {
+  const executionStore = useExecutionStore()
+  const { executingNodeIds: storeExecutingNodeIds, nodeProgressStates } =
+    storeToRefs(executionStore)
+
+  // Convert execution store data to the format expected by Vue nodes
+  const executingNodeIds = computed(
+    () => new Set(storeExecutingNodeIds.value.map(String))
+  )
+
+  // Provide the execution state to all child Vue nodes
+  provide(ExecutingNodeIdsKey, executingNodeIds)
+  provide(NodeProgressStatesKey, nodeProgressStates)
+
+  return {
+    executingNodeIds,
+    nodeProgressStates
+  }
+}