Fix so sidebar only shows on home page when jumbotron disabled

[mattstratton]

Summary

This PR fixes the grid layout by restoring the correct "stretched link" pattern for episode and blog cards. The <a> tag is now a self-closing, absolutely positioned sibling to the card content, ensuring valid HTML and proper multi-column grid display. All related config and row layout changes are included to ensure consistency and prevent regressions.

Testing Steps

• Run npm run build and verify that the grid layout displays cards in multiple columns as expected.
• Confirm that each card is fully clickable and the hover effect works.
• Check that the row layout and pagination continue to function correctly.

Context

• This addresses a regression where the grid layout was rendered as a single column due to invalid HTML structure after a previous update.
• All changed files are included in this commit to ensure nothing is missed.

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