[backport cloud/1.37] Workspaces 3 create a workspace (#8221) (#8252)

## Summary
- Backport of #8221 to cloud/1.37
- Cherry-picked commit a08ccb55c1 with
conflict resolution

## Conflicts resolved
- `src/components/dialog/GlobalDialog.vue`: Added workspace mode CSS
styling from PR
- `src/platform/cloud/subscription/components/SubscriptionPanel.vue`:
Accepted PR refactoring to use conditional workspace components

🤖 Generated with [Claude Code](https://claude.ai/code)

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-8252-backport-cloud-1-37-Workspaces-3-create-a-workspace-8221-2f06d73d365081e1a38ed4492a7bc6a8)
by [Unito](https://www.unito.io)

---------

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
Co-authored-by: GitHub Action <action@github.com>

src/platform/cloud/subscription/components/SubscribeButton.vue

@@ -2,7 +2,7 @@
   <Button
     :size
     :loading="isLoading"
-    :disabled="isPolling"
+    :disabled="disabled || isPolling"
     variant="primary"
     :style="
       variant === 'gradient'
@@ -32,12 +32,14 @@ const {
   size = 'lg',
   fluid = true,
   variant = 'default',
-  label
+  label,
+  disabled = false
 } = defineProps<{
   label?: string
   size?: 'sm' | 'lg'
   variant?: 'default' | 'gradient'
   fluid?: boolean
+  disabled?: boolean
 }>()
 
 const emit = defineEmits<{