Workspaces 3 create a workspace (#8221)

## Summary

Add workspace creation and management (create, edit, delete, leave,
switch workspaces).

  Follow-up PR will add invite and membership flow.

  ## Changes

  - Workspace CRUD dialogs
  - Workspace switcher popover in topbar
  - Workspace settings panel
  - Subscription panel for workspace context
  

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-8221-Workspaces-3-create-a-workspace-2ef6d73d36508155975ffa6e315971ec)
by [Unito](https://www.unito.io)

---------

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

src/platform/workspace/api/workspaceApi.ts

@@ -4,8 +4,8 @@ import { t } from '@/i18n'
 import { api } from '@/scripts/api'
 import { useFirebaseAuthStore } from '@/stores/firebaseAuthStore'
 
-type WorkspaceType = 'personal' | 'team'
-type WorkspaceRole = 'owner' | 'member'
+export type WorkspaceType = 'personal' | 'team'
+export type WorkspaceRole = 'owner' | 'member'
 
 interface Workspace {
   id: string