Introduce view subscriptions URL trigger

🔍 Problem Statement

Customers receiving subscription renewal emails cannot be directed to a specific “My Subscriptions” view after logging in. This creates friction in the renewal process, as users must manually navigate the platform to find their subscriptions, increasing the risk of drop-off and reducing conversion rates.

💡 User Story

As a subscriber, I want to be directed straight to my subscriptions page when I click a renewal link, so that I can quickly review and renew my subscription without having to navigate manually.

🎯 Definition of Done (DoD)

1. Users clicking a renewal/any link (e.g., with #view=subscriptions) are:

2. Redirected to login if not authenticated

3. Automatically taken to the Subscriptions view after login

4. The system supports deep linking to specific account sections (e.g., subscriptions)

5. The transition is seamless across devices (desktop/mobile)

6. No additional navigation is required from the user to access their subscriptions

7. The feature is tested for:

8. Logged-in users

9. Logged-out users (with redirect after login)

10. The renewal flow is validated end-to-end (email → login → subscriptions page)