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/core/canvas/injectionKeys.ts

@@ -1,8 +1,25 @@
 import type { InjectionKey, Ref } from 'vue'
 
+import type { NodeProgressState } from '@/schemas/apiSchema'
+
 /**
  * Injection key for providing selected node IDs to Vue node components.
  * Contains a reactive Set of selected node IDs (as strings).
  */
 export const SelectedNodeIdsKey: InjectionKey<Ref<Set<string>>> =
   Symbol('selectedNodeIds')
+
+/**
+ * Injection key for providing executing node IDs to Vue node components.
+ * Contains a reactive Set of currently executing node IDs (as strings).
+ */
+export const ExecutingNodeIdsKey: InjectionKey<Ref<Set<string>>> =
+  Symbol('executingNodeIds')
+
+/**
+ * Injection key for providing node progress states to Vue node components.
+ * Contains a reactive Record of node IDs to their current progress state.
+ */
+export const NodeProgressStatesKey: InjectionKey<
+  Ref<Record<string, NodeProgressState>>
+> = Symbol('nodeProgressStates')