Workspaces 4 members invites (#8245)

## Summary

  Add team workspace member management and invite system.

## Changes

- Add members panel with role management (owner/admin/member) and member
removal
- Add invite system with email invites, pending invite display, and
revoke functionality
   - Add invite URL loading for accepting invites
  - Add subscription panel updates for member management
  - Add i18n translations for member and invite features

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-8245-Workspaces-4-members-invites-2f06d73d36508176b2caf852a1505c4a)
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/workspace/api/workspaceApi.ts

@@ -22,6 +22,7 @@ export interface Member {
   name: string
   email: string
   joined_at: string
+  role: WorkspaceRole
 }
 
 interface PaginationInfo {
@@ -110,6 +111,18 @@ async function getAuthHeaderOrThrow() {
   return authHeader
 }
 
+async function getFirebaseHeaderOrThrow() {
+  const authHeader = await useFirebaseAuthStore().getFirebaseAuthHeader()
+  if (!authHeader) {
+    throw new WorkspaceApiError(
+      t('toastMessages.userNotAuthenticated'),
+      401,
+      'NOT_AUTHENTICATED'
+    )
+  }
+  return authHeader
+}
+
 function handleAxiosError(err: unknown): never {
   if (axios.isAxiosError(err)) {
     const status = err.response?.status
@@ -296,9 +309,10 @@ export const workspaceApi = {
   /**
    * Accept a workspace invite.
    * POST /api/invites/:token/accept
+   * Uses Firebase auth (user identity) since the user isn't yet a workspace member.
    */
   async acceptInvite(token: string): Promise<AcceptInviteResponse> {
-    const headers = await getAuthHeaderOrThrow()
+    const headers = await getFirebaseHeaderOrThrow()
     try {
       const response = await workspaceApiClient.post<AcceptInviteResponse>(
         api.apiURL(`/invites/${token}/accept`),