No Subscription Popup

If the user has no subscription, display a message and a "Subscribe" button.

📋 Acceptance Criteria

✅ What to consider:

• Users without an active subscription should not access premium features.
• A clear and non-intrusive popup must appear when access is attempted.
• The popup should explain the need for a subscription and offer an action to proceed.

✅ Acceptance Criteria (AC):

• GIVEN the user does not have an active subscription

• WHEN they attempt to access a premium feature

• THEN a popup appears prompting them to subscribe

• GIVEN the popup is displayed

• WHEN the user interacts with it

• THEN they are redirected to the subscription screen or checkout page

✅ Please check the Definition of Done before moving this issue to Close.