fix(execution): reset progress state after runs to unfreeze tab title/favicon (#6025)

## Summary
Fixes browser tab progress and favicon remaining at ~14% after workflow
completion on `rh-test` by resetting execution state on success, error,
or interruption.

## Changes
- Add `execution_success` listener in the execution store
- Centralize terminal-state cleanup in `resetExecutionState()`
- Clear `nodeProgressStates`, queued prompt entry,
`_executingNodeProgress`, and set `activePromptId` to `null`
- Ensures `isIdle` becomes `true` post-run so tab title and favicon no
longer freeze mid-progress

Resolves #6024

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-6025-fix-execution-reset-progress-state-after-runs-to-unfreeze-tab-title-favicon-2896d73d365081fc8849f3814f524d41)
by [Unito](https://www.unito.io)

src/stores/executionStore.ts

@@ -239,6 +239,7 @@ export const useExecutionStore = defineStore('execution', () => {
     api.addEventListener('execution_start', handleExecutionStart)
     api.addEventListener('execution_cached', handleExecutionCached)
     api.addEventListener('execution_interrupted', handleExecutionInterrupted)
+    api.addEventListener('execution_success', handleExecutionSuccess)
     api.addEventListener('executed', handleExecuted)
     api.addEventListener('executing', handleExecuting)
     api.addEventListener('progress', handleProgress)
@@ -253,6 +254,7 @@ export const useExecutionStore = defineStore('execution', () => {
     api.removeEventListener('execution_start', handleExecutionStart)
     api.removeEventListener('execution_cached', handleExecutionCached)
     api.removeEventListener('execution_interrupted', handleExecutionInterrupted)
+    api.removeEventListener('execution_success', handleExecutionSuccess)
     api.removeEventListener('executed', handleExecuted)
     api.removeEventListener('executing', handleExecuting)
     api.removeEventListener('progress', handleProgress)
@@ -277,7 +279,7 @@ export const useExecutionStore = defineStore('execution', () => {
   }
 
   function handleExecutionInterrupted() {
-    nodeProgressStates.value = {}
+    resetExecutionState()
   }
 
   function handleExecuted(e: CustomEvent<ExecutedWsMessage>) {
@@ -285,6 +287,10 @@ export const useExecutionStore = defineStore('execution', () => {
     activePrompt.value.nodes[e.detail.node] = true
   }
 
+  function handleExecutionSuccess() {
+    resetExecutionState()
+  }
+
   function handleExecuting(e: CustomEvent<NodeId | null>): void {
     // Clear the current node progress when a new node starts executing
     _executingNodeProgress.value = null
@@ -346,6 +352,19 @@ export const useExecutionStore = defineStore('execution', () => {
 
   function handleExecutionError(e: CustomEvent<ExecutionErrorWsMessage>) {
     lastExecutionError.value = e.detail
+    resetExecutionState()
+  }
+
+  /**
+   * Reset execution-related state after a run completes or is stopped.
+   */
+  function resetExecutionState() {
+    nodeProgressStates.value = {}
+    if (activePromptId.value) {
+      delete queuedPrompts.value[activePromptId.value]
+    }
+    activePromptId.value = null
+    _executingNodeProgress.value = null
   }
 
   function getNodeIdIfExecuting(nodeId: string | number) {