Fix subscription write error

backend/src/app.ts

@@ -947,6 +947,11 @@ const requireWorkspaceRole = (allowedRoles: WorkspaceRole[]) => (req: Request, r
   next();
 };
 
+const isBillingOnlyWorkspaceUpdate = (
+  workspace: WorkspaceRow,
+  payload: z.infer<typeof workspaceSchema>,
+) => workspace.workspace_type === 'standard' && payload.workspaceType === 'standard' && payload.name === workspace.name;
+
 app.get('/api/health', (_req: Request, res: Response) => {
   res.json({ ok: true });
 });
@@ -1514,7 +1519,7 @@ app.get('/api/workspace', requireAuth, async (req: Request, res: Response) => {
   res.json({ workspace: normalizeWorkspace(req.auth!.workspace) });
 });
 
-app.put('/api/workspace', requireAuth, requireWriteAccess, requireWorkspaceRole(['owner', 'assistant']), async (req: Request, res: Response, next: NextFunction) => {
+app.put('/api/workspace', requireAuth, requireSessionAuth, requireWorkspaceRole(['owner', 'assistant']), async (req: Request, res: Response, next: NextFunction) => {
   const parsed = workspaceSchema.safeParse(req.body);
 
   if (!parsed.success) {
@@ -1523,17 +1528,35 @@ app.put('/api/workspace', requireAuth, requireWriteAccess, requireWorkspaceRole(
   }
 
   try {
-    const billingPlan = resolveBillingPlan(parsed.data.workspaceType, parsed.data.billingPlan ?? req.auth!.workspace.billing_plan);
+    const currentWorkspace = req.auth!.workspace;
+    const billingPlan = resolveBillingPlan(parsed.data.workspaceType, parsed.data.billingPlan ?? currentWorkspace.billing_plan);
+    const billingInterval = parsed.data.workspaceType === 'rescue' ? 'monthly' : (parsed.data.billingInterval ?? currentWorkspace.billing_interval);
+    const canUpdateWorkspace =
+      isAdminUser(req.auth!.user) ||
+      subscriptionAllowsWrite(currentWorkspace) ||
+      isBillingOnlyWorkspaceUpdate(currentWorkspace, parsed.data);
+
+    if (!canUpdateWorkspace) {
+      res.status(402).json({
+        error:
+          currentWorkspace.workspace_type === 'rescue'
+            ? 'This rescue flock is read-only until FlockPal verifies it.'
+            : 'This flock is read-only until the subscription is restored.',
+        code: 'workspace_read_only',
+      });
+      return;
+    }
+
     const workspace = await updateWorkspace({
-      workspaceId: req.auth!.workspace.id,
+      workspaceId: currentWorkspace.id,
       name: parsed.data.name,
       workspaceType: parsed.data.workspaceType,
       billingEmail: emptyToNull(parsed.data.billingEmail),
       billingPlan,
-      billingInterval: parsed.data.workspaceType === 'rescue' ? 'monthly' : (parsed.data.billingInterval ?? req.auth!.workspace.billing_interval),
+      billingInterval,
     });
 
-    if (workspace?.workspace_type === 'rescue' && req.auth!.workspace.workspace_type !== 'rescue') {
+    if (workspace?.workspace_type === 'rescue' && currentWorkspace.workspace_type !== 'rescue') {
       await sendRescueStatusNotification({
         workspace,
         ownerEmail: req.auth!.user.email,