Enhance SubscriptionForm.vue for better readability and accessibility

[swati-londhe]

Summary

Improved the SubscriptionForm.vue component for better readability, structure, and accessibility.

Changes Made

• Added an aria-label to the email input for screen reader accessibility.
• Improved indentation and readability across HTML elements.
• Added inline comments to explain purpose of hidden checkboxes and form action.
• Renamed placeholder text to be more descriptive.
• Ensured consistent spacing and formatting for clarity.

Impact

These improvements make the code easier to understand, maintain, and more accessible for all users.

Testing

• Verified form submission still works correctly.
• Checked accessibility with browser dev tools.
• No functional changes introduced.

[vercel]

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