fix(web): improve memories layout on small screens

[lukashass]

Description

Improves responsive layout of memory viewer on small screens.

How Has This Been Tested?

• verified layout in dev-tools (see screenshots)

Screenshots

before	after

Checklist:

• I have performed a self-review of my own code
• I have made corresponding changes to the documentation if applicable
• I have no unrelated changes in the PR.
• I have confirmed that any new dependencies are strictly necessary.
• I have written tests for new code (if applicable)
• I have followed naming conventions/patterns in the surrounding code
• All code in src/services uses repositories implementations for database calls, filesystem operations, etc.
• All code in src/repositories/ is pretty basic/simple and does not have any immich specific logic (that belongs in src/services)