subscription page (#6064)

Summary

Implements cloud subscription management UI and flow for ComfyUI Cloud
users.

  Core Features:
- Subscription Status Tracking: Global reactive state management for
subscription status across all components
  using shared subscriptionStatus ref
- Subscribe to Run Button: Replaces the Run button in the actionbar with
a "Subscribe to Run" button for users
  without active subscriptions
- Subscription Required Dialog: Modal dialog with subscription benefits,
pricing, and checkout flow with video
  background
- Subscription Settings Panel: New settings panel showing subscription
status, renewal date, and quick access to
  billing management
- Auto-detection & Polling: Automatically polls subscription status
after checkout completion and syncs state
  across the application


https://github.com/user-attachments/assets/f41b8e6a-5845-48a7-8169-3a6fc0d2e5c8



┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-6064-subscription-page-28d6d73d36508135a2a0fe7c94b40852)
by [Unito](https://www.unito.io)

---------

Co-authored-by: GitHub Action <action@github.com>

src/components/actionbar/ComfyRunButton/index.ts

@@ -0,0 +1,7 @@
+import { defineAsyncComponent } from 'vue'
+
+import { isCloud } from '@/platform/distribution/types'
+
+export default isCloud
+  ? defineAsyncComponent(() => import('./CloudRunButtonWrapper.vue'))
+  : defineAsyncComponent(() => import('./ComfyQueueButton.vue'))