feat(sidebar): autofocus search input in Workflows, Model, and Node tabs (#7179)

## Summary
This PR improves the user experience by automatically focusing the
search input field when opening the Workflows, Model Library, or Node
Library sidebar tabs.

## Changes
- **SearchBox.vue**: Exposed a `focus()` method to allow parent
components to programmatically set focus on the input.
- **WorkflowsSidebarTab.vue**: Added a watcher to focus the search box
when the tab is activated.
- **ModelLibrarySidebarTab.vue**: Added autofocus on component mount.
- **NodeLibrarySidebarTab.vue**: Added autofocus on component mount.

## Motivation
Users often switch to these tabs specifically to search for an item.
Automatically focusing the search box reduces friction and saves a
click.



https://github.com/user-attachments/assets/8438e71c-a5e4-4b6c-8665-04d535d3ad8e

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-7179-feat-sidebar-autofocus-search-input-in-Workflows-Model-and-Node-tabs-2c06d73d36508199b8c0e83d19f1cd84)
by [Unito](https://www.unito.io)

src/components/common/SearchBox.vue

@@ -10,6 +10,7 @@
         @click="$emit('showFilter', $event)"
       />
       <InputText
+        ref="inputRef"
         class="search-box-input w-full"
         :model-value="modelValue"
         :placeholder="placeholder"
@@ -48,6 +49,7 @@ import Button from 'primevue/button'
 import IconField from 'primevue/iconfield'
 import InputIcon from 'primevue/inputicon'
 import InputText from 'primevue/inputtext'
+import { ref } from 'vue'
 
 import type { SearchFilter } from './SearchFilterChip.vue'
 import SearchFilterChip from './SearchFilterChip.vue'
@@ -77,6 +79,14 @@ const emit = defineEmits<{
   (e: 'removeFilter', filter: TFilter): void
 }>()
 
+const inputRef = ref()
+
+defineExpose({
+  focus: () => {
+    inputRef.value?.$el?.focus()
+  }
+})
+
 const emitSearch = debounce((value: string) => {
   emit('search', value, filters)
 }, debounceTime)

src/components/sidebar/tabs/ModelLibrarySidebarTab.vue

@@ -21,6 +21,7 @@
     </template>
     <template #header>
       <SearchBox
+        ref="searchBoxRef"
         v-model:model-value="searchQuery"
         class="model-lib-search-box p-2 2xl:p-4"
         :placeholder="$t('g.searchModels') + '...'"
@@ -66,6 +67,7 @@ import { buildTree } from '@/utils/treeUtil'
 const modelStore = useModelStore()
 const modelToNodeStore = useModelToNodeStore()
 const settingStore = useSettingStore()
+const searchBoxRef = ref()
 const searchQuery = ref<string>('')
 const expandedKeys = ref<Record<string, boolean>>({})
 const { expandNode, toggleNodeOnEvent } = useTreeExpansion(expandedKeys)
@@ -180,6 +182,7 @@ watch(
 )
 
 onMounted(async () => {
+  searchBoxRef.value?.focus()
   if (settingStore.get('Comfy.ModelLibrary.AutoLoadAll')) {
     await modelStore.loadModels()
   }

src/components/sidebar/tabs/NodeLibrarySidebarTab.vue

@@ -78,6 +78,7 @@
       <template #header>
         <div>
           <SearchBox
+            ref="searchBoxRef"
             v-model:model-value="searchQuery"
             class="node-lib-search-box p-2 2xl:p-4"
             :placeholder="$t('g.searchNodes') + '...'"
@@ -130,7 +131,7 @@ import Button from 'primevue/button'
 import Divider from 'primevue/divider'
 import Popover from 'primevue/popover'
 import type { Ref } from 'vue'
-import { computed, h, nextTick, ref, render } from 'vue'
+import { computed, h, nextTick, onMounted, ref, render } from 'vue'
 
 import SearchBox from '@/components/common/SearchBox.vue'
 import type { SearchFilter } from '@/components/common/SearchFilterChip.vue'
@@ -171,6 +172,12 @@ const { expandNode, toggleNodeOnEvent } = useTreeExpansion(expandedKeys)
 const nodeBookmarkTreeExplorerRef = ref<InstanceType<
   typeof NodeBookmarkTreeExplorer
 > | null>(null)
+const searchBoxRef = ref()
+
+onMounted(() => {
+  searchBoxRef.value?.focus()
+})
+
 const searchFilter = ref<InstanceType<typeof Popover> | null>(null)
 const groupingPopover = ref<InstanceType<typeof Popover> | null>(null)
 const sortingPopover = ref<InstanceType<typeof Popover> | null>(null)

src/components/sidebar/tabs/WorkflowsSidebarTab.vue

@@ -14,6 +14,7 @@
     </template>
     <template #header>
       <SearchBox
+        ref="searchBoxRef"
         v-model:model-value="searchQuery"
         class="workflows-search-box p-2 2xl:p-4"
         :placeholder="$t('g.searchWorkflows') + '...'"
@@ -158,6 +159,8 @@ const workflowTabsPosition = computed(() =>
   settingStore.get('Comfy.Workflow.WorkflowTabsPosition')
 )
 
+const searchBoxRef = ref()
+
 const searchQuery = ref('')
 const isSearching = computed(() => searchQuery.value.length > 0)
 const filteredWorkflows = ref<ComfyWorkflow[]>([])
@@ -295,6 +298,7 @@ const selectionKeys = computed(() => ({
 
 const workflowBookmarkStore = useWorkflowBookmarkStore()
 onMounted(async () => {
+  searchBoxRef.value?.focus()
   await workflowBookmarkStore.loadBookmarks()
 })
 </script>