[Bug]: Community meetings dropdown is not keyboard accessible

[airajena]

Consisely describe the issue

Description

The "Older meeting details" dropdown in the community meetings section uses a clickable <div> as its
toggle instead of a <button>.

This means:

• The toggle cannot be focused or activated with the keyboard (no tab stop, no Enter/Space handling).
• Screen readers have no way to know it's an interactive control, or whether the options panel is currently open or closed.

Steps to reproduce

1. Go to the Community page.
2. Try to reach "Older meeting details" using only the keyboard (Tab).
3. The control is skipped entirely; there's no way to open it without a mouse.

Expected behavior

The dropdown toggle should be a real button: focusable, operable with the keyboard, and announced correctly by assistive technology

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• This issue is human-written, and folow up comments will also be human-written