fix(a11y): enhance touch target for destination photos

[KenTandrian]

This PR fixes an accessibility issue in the "Destination Photos" component where the touch target size for the photos was smaller than the minimum required dimensions (48x48dp on Android / 44x44pt on iOS). Previously, only the attribution text at the bottom was clickable.

Changes

• Expanded Touch Target: Refactored ModvilTrackerPhotoElement to convert the main container (.inner) into an <a> tag. This makes the entire photo card clickable and ensures it meets touch target size requirements.
• Semantic Structure: Replaced the nested interactive elements with a single block-level link, improving HTML semantics and keyboard navigation.
• Visual & Focus States: Updated SCSS to ensure the new anchor container maintains the correct visual layout and added hover styles to underline the attribution text when the card is hovered.

Impacted UI components

• Destination Photos (modvil-tracker-photo).

[KenTandrian]

Before:

After: