App mode - Unify menus - 2 (#9023)

## Summary

Updates subgraph breadcrumbs menu, workflow tabs context menu & linear
mode menu to use a single implementation.
Adds new menu items for enter/exit app mode  
Hides menu when in builder mode

## Changes

- **What**: Changes the components to use either a reka-ui context menu
or dropdown, with a standard inner list
- **Breaking**: Remove existing linear toggle from sidebar as it is now
in the menu


## Screenshots (if applicable)
It looks basically identical other than the icon changes based on mode:

In Graph Mode:
<img width="261" height="497" alt="image"
src="https://github.com/user-attachments/assets/eb9968a2-b528-4e21-9e14-ab4a67e717ae"
/>

In App Mode:
<img width="254" height="499" alt="image"
src="https://github.com/user-attachments/assets/54a89fab-e7b2-4cb0-bcb7-43d6d076ac83"
/>

Right click tab:
<img width="321" height="564" alt="image"
src="https://github.com/user-attachments/assets/c12c7d64-2dba-45bb-be76-2615f3e38cc6"
/>

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-9023-App-mode-Unify-menus-2-30d6d73d36508162bfc0e308d5f705de)
by [Unito](https://www.unito.io)

---------

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

src/renderer/extensions/linearMode/LinearControls.vue

@@ -26,7 +26,7 @@ import { useExecutionErrorStore } from '@/stores/executionErrorStore'
 import { useQueueSettingsStore } from '@/stores/queueStore'
 import type { SimplifiedWidget } from '@/types/simplifiedWidget'
 import { cn } from '@/utils/tailwindUtil'
-
+import { useAppModeStore } from '@/stores/appModeStore'
 const { t } = useI18n()
 const commandStore = useCommandStore()
 const executionStore = useExecutionStore()
@@ -35,6 +35,7 @@ const { batchCount } = storeToRefs(useQueueSettingsStore())
 const settingStore = useSettingStore()
 const { isActiveSubscription } = useBillingContext()
 const workflowStore = useWorkflowStore()
+const appModeStore = useAppModeStore()
 
 const props = defineProps<{
   toastTo?: string | HTMLElement
@@ -146,7 +147,10 @@ async function runButtonClick(e: Event) {
 defineExpose({ runButtonClick })
 </script>
 <template>
-  <div class="flex flex-col min-w-80 md:h-full">
+  <div
+    v-if="!appModeStore.isBuilderMode"
+    class="flex flex-col min-w-80 md:h-full"
+  >
     <section
       v-if="mobile"
       data-testid="linear-run-button"