[feat] Improve queue job item UX based on design feedback (#6893)

## Summary
- Running jobs now show cancel button at all times (always visible, not
just on hover)
- Cancel/delete buttons use destructive red styling by default with
hover state
- Changed pending job icon from clock to loader-circle with spin
animation
- Fixed icon buttons to be square (size-6) instead of rectangular
- Added TODO comment for future declarative button config system
- Pending hint ("Job added to queue") now shows only once per entry and
no longer resets when other jobs update
- Spinner animation now applies only to the pending loader icon;
completed/check icons no longer spin
- Queue overlay hover/active state also triggers when hovering the top
menu bar so controls stay visible

## Design Spec

https://www.notion.so/comfy-org/Design-Queue-Dialog-Job-Ordering-and-Cancel-Button-Visibility-2b46d73d365081748a43d5cc9fbe2639

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-6893-feat-Improve-queue-job-item-UX-based-on-design-feedback-2b56d73d365081a2bc7ef6f6fea1c739)
by [Unito](https://www.unito.io)

---------

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

src/components/queue/QueueProgressOverlay.vue

@@ -60,7 +60,7 @@
 </template>
 
 <script setup lang="ts">
-import { computed, nextTick, ref } from 'vue'
+import { computed, nextTick, ref, withDefaults } from 'vue'
 import { useI18n } from 'vue-i18n'
 
 import QueueOverlayActive from '@/components/queue/QueueOverlayActive.vue'
@@ -85,9 +85,15 @@ import { useSidebarTabStore } from '@/stores/workspace/sidebarTabStore'
 
 type OverlayState = 'hidden' | 'empty' | 'active' | 'expanded'
 
-const props = defineProps<{
-  expanded?: boolean
-}>()
+const props = withDefaults(
+  defineProps<{
+    expanded?: boolean
+    menuHovered?: boolean
+  }>(),
+  {
+    menuHovered: false
+  }
+)
 
 const emit = defineEmits<{
   (e: 'update:expanded', value: boolean): void
@@ -110,6 +116,7 @@ const {
   currentNodeProgressStyle
 } = useQueueProgress()
 const isHovered = ref(false)
+const isOverlayHovered = computed(() => isHovered.value || props.menuHovered)
 const internalExpanded = ref(false)
 const isExpanded = computed({
   get: () =>
@@ -142,7 +149,7 @@ const showBackground = computed(
   () =>
     overlayState.value === 'expanded' ||
     overlayState.value === 'empty' ||
-    (overlayState.value === 'active' && isHovered.value)
+    (overlayState.value === 'active' && isOverlayHovered.value)
 )
 
 const isVisible = computed(() => overlayState.value !== 'hidden')
@@ -156,7 +163,7 @@ const containerClass = computed(() =>
 const bottomRowClass = computed(
   () =>
     `flex items-center justify-end gap-4 transition-opacity duration-200 ease-in-out ${
-      overlayState.value === 'active' && isHovered.value
+      overlayState.value === 'active' && isOverlayHovered.value
         ? 'opacity-100 pointer-events-auto'
         : 'opacity-0 pointer-events-none'
     }`