fix(ui): make SearchParameter rows clickable

[Gordex2014]

What changed

• Match the English Search Parameters heading with the sidebar label.
• Let pointer clicks anywhere in a result row follow its existing link.
• Keep one native link per row for keyboard and no-JavaScript navigation.
• Skip row navigation while the user selects text or interacts with a nested control.

Testing

• cargo check -p helios-ui
• cargo test -p helios-ui --test router_http search_parameters_page_serves_the_registry_view
• Manual browser QA covered every table cell, text selection, keyboard navigation, htmx history, JavaScript-disabled navigation, and the English, Spanish, and German labels.

Closes #610

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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