feat: Update workflow menu to allow quick toggling modes (#9436)

## Summary

Adds a quick toggle mode button to the workflow menu for users to easier
discover & change modes

## Changes

- **What**: 
- remove specific app mode rendering
- increase spacing around breadcrumbs menu
- add current mode text to menu
- add base button variant

## Screenshots (if applicable)

<img width="258" height="137" alt="image"
src="https://github.com/user-attachments/assets/2ed7b276-c52c-44cd-b107-399f769574af"
/>
<img width="233" height="172" alt="image"
src="https://github.com/user-attachments/assets/2639d30c-2150-4434-a86b-732649c4b142"
/>

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-9436-feat-Update-workflow-menu-to-allow-quick-toggling-modes-31a6d73d365081b589eee0e03cd6f1de)
by [Unito](https://www.unito.io)

---------

Co-authored-by: github-actions <github-actions@github.com>

src/components/common/WorkflowActionsDropdown.vue

@@ -5,6 +5,7 @@ import {
   DropdownMenuRoot,
   DropdownMenuTrigger
 } from 'reka-ui'
+import { ref } from 'vue'
 import { useI18n } from 'vue-i18n'
 
 import WorkflowActionsList from '@/components/common/WorkflowActionsList.vue'
@@ -22,6 +23,7 @@ const { source, align = 'start' } = defineProps<{
 
 const { t } = useI18n()
 const canvasStore = useCanvasStore()
+const dropdownOpen = ref(false)
 
 const { menuItems } = useWorkflowActionsMenu(
   () => useCommandStore().execute('Comfy.RenameWorkflow'),
@@ -40,22 +42,38 @@ function handleOpen(open: boolean) {
     })
   }
 }
+
+function toggleLinearMode() {
+  dropdownOpen.value = false
+  void useCommandStore().execute('Comfy.ToggleLinear', {
+    metadata: { source }
+  })
+}
 </script>
 
 <template>
-  <DropdownMenuRoot @update:open="handleOpen">
-    <DropdownMenuTrigger as-child>
-      <slot name="button" :has-unseen-items="hasUnseenItems">
+  <DropdownMenuRoot v-model:open="dropdownOpen" @update:open="handleOpen">
+    <slot name="button" :has-unseen-items="hasUnseenItems">
+      <div
+        class="pointer-events-auto inline-flex items-center rounded-lg bg-secondary-background"
+      >
         <Button
           v-tooltip="{
-            value: t('breadcrumbsMenu.workflowActions'),
+            value: canvasStore.linearMode
+              ? t('breadcrumbsMenu.enterNodeGraph')
+              : t('breadcrumbsMenu.enterAppMode'),
             showDelay: 300,
             hideDelay: 300
           }"
-          variant="secondary"
-          size="unset"
-          :aria-label="t('breadcrumbsMenu.workflowActions')"
-          class="pointer-events-auto relative h-10 gap-1 rounded-lg pr-2 pl-3 data-[state=open]:bg-secondary-background-hover data-[state=open]:shadow-interface"
+          :aria-label="
+            canvasStore.linearMode
+              ? t('breadcrumbsMenu.enterNodeGraph')
+              : t('breadcrumbsMenu.enterAppMode')
+          "
+          variant="base"
+          class="m-1"
+          @pointerdown.stop
+          @click="toggleLinearMode"
         >
           <i
             class="size-4"
@@ -65,15 +83,36 @@ function handleOpen(open: boolean) {
                 : 'icon-[comfy--workflow]'
             "
           />
-          <i class="icon-[lucide--chevron-down] size-4 text-muted-foreground" />
-          <span
-            v-if="hasUnseenItems"
-            aria-hidden="true"
-            class="absolute -top-0.5 -right-0.5 size-2 rounded-full bg-primary-background"
-          />
         </Button>
-      </slot>
-    </DropdownMenuTrigger>
+        <DropdownMenuTrigger as-child>
+          <Button
+            v-tooltip="{
+              value: t('breadcrumbsMenu.workflowActions'),
+              showDelay: 300,
+              hideDelay: 300
+            }"
+            variant="secondary"
+            size="unset"
+            :aria-label="t('breadcrumbsMenu.workflowActions')"
+            class="relative h-10 gap-1 rounded-lg pr-2 pl-2.5 text-center data-[state=open]:bg-secondary-background-hover data-[state=open]:shadow-interface"
+          >
+            <span>{{
+              canvasStore.linearMode
+                ? t('breadcrumbsMenu.app')
+                : t('breadcrumbsMenu.graph')
+            }}</span>
+            <i
+              class="icon-[lucide--chevron-down] size-4 text-muted-foreground"
+            />
+            <span
+              v-if="hasUnseenItems"
+              aria-hidden="true"
+              class="absolute -top-0.5 -right-0.5 size-2 rounded-full bg-primary-background"
+            />
+          </Button>
+        </DropdownMenuTrigger>
+      </div>
+    </slot>
     <DropdownMenuPortal>
       <DropdownMenuContent
         :align