fix: rehydrate nodeProgressStates on workflow tab switch

Adds a watcher on workflowStore.activeWorkflow?.path that syncs the
"current view" nodeProgressStates from nodeProgressStatesByJob when
the user switches tabs, preventing stale progress from the previous
workflow from being displayed.

Addresses review feedback:
https://github.com/Comfy-Org/ComfyUI_frontend/pull/10689#discussion_r3005427994

src/stores/executionStore.ts

@@ -1,5 +1,5 @@
 import { defineStore } from 'pinia'
-import { computed, ref, shallowRef } from 'vue'
+import { computed, ref, shallowRef, watch } from 'vue'
 
 import { useNodeProgressText } from '@/composables/node/useNodeProgressText'
 import { isCloud } from '@/platform/distribution/types'
@@ -645,6 +645,28 @@ export const useExecutionStore = defineStore('execution', () => {
     return jobPath === activePath
   }
 
+  // Rehydrate the "current view" progress when the user switches workflow tabs
+  // so stale progress from the previous tab is not displayed.
+  watch(
+    () => workflowStore.activeWorkflow?.path,
+    (newPath) => {
+      if (!newPath) {
+        nodeProgressStates.value = {}
+        return
+      }
+      // Find the most recent job that belongs to the new active workflow
+      const jobEntries = Object.entries(nodeProgressStatesByJob.value)
+      for (let i = jobEntries.length - 1; i >= 0; i--) {
+        const [jobId, states] = jobEntries[i]
+        if (jobIdToSessionWorkflowPath.value.get(jobId) === newPath) {
+          nodeProgressStates.value = states
+          return
+        }
+      }
+      nodeProgressStates.value = {}
+    }
+  )
+
   return {
     isIdle,
     clientId,