fixes from feedback on edu events and news listing pages

[stephiescastle]

Checklist

• [x] Include a description of your pull request and instructions for the reviewer to verify your work.
• [x] Link to the issue if this PR is issue-specific.
• [x] Create/update the corresponding story if this includes a UI component.
• [ ] Create/update documentation. If not included, tell us why.
• [x] List the environments / browsers in which you tested your changes.
• [x] Tests, linting, or other required checks are passing.
• [x] PR has an informative and human-readable title
  • PR titles are used to generate the change log in releases; good ones make that easier to scan.
  • PRs will be broadly categorized in the change log, but for even easier scanning, consider prefixing with a component name or other useful categorization, e.g., "BaseButton: fix layout bug", or "Storybook: Update dependencies".
• [x] PR has been tagged with a SemVer label and a general category label, or skip-changelog.
  • These tags are used to do the aforementioned broad categorization in the change log and determine what the next release's version number should be.
  • Release Drafter will attempt to do the category labeling for you! Please double-check its work.

Description

Address the following feedback:

• https://github.com/nasa-jpl/www/issues/272#issuecomment-2322339587
• https://github.com/nasa-jpl/www/issues/273#issuecomment-2322348964

Instructions to test

A lot of the changes pair with corresponding changes to www, but you can test visual changes to BlockLinkCard in storybook (line clamping, placement of date, line separating items).

1. make vue-storybook
2. View http://localhost:6006/?path=/story/components-cards-searchresultcards--edu-event-card&globals=theme:ThemeEdu

Tested in the following environments/browsers:

Operating System

• [x] macOS
• [ ] iOS
• [ ] iPadOS
• [ ] Windows

Browser

• [x] Chrome
• [x] Firefox ESR
• [ ] Firefox
• [ ] Safari
• [ ] Edge