Update application_controller to store client header in session

app/controllers/auth/ios_controller.rb

@@ -3,12 +3,19 @@
 module Auth
   class IosController < ApplicationController
     def success
-      render json: {
-        success: true,
-        message: 'iOS authentication successful',
-        token: params[:token],
-        redirect_url: root_url
-      }, status: :ok
+      # If token is provided, this is the final callback for ASWebAuthenticationSession
+      if params[:token].present?
+        # ASWebAuthenticationSession will capture this URL and extract the token
+        render plain: "Authentication successful! You can close this window.", status: :ok
+      else
+        # This should not happen with our current flow, but keeping for safety
+        render json: {
+          success: true,
+          message: 'iOS authentication successful',
+          redirect_url: root_url
+        }, status: :ok
+      end
     end
+
   end
 end