Make table name under record page title clickable (#4916)

Fixes #4916

Summary

• Wrap the table name shown under the record page title in an anchor linking to the table page.
• Add styles so the link is visibly clickable, uses the table icon yellow on hover/focus (prefers --color-table), shows underline on hover, and has a visible :focus-visible outline for keyboard users.
• File changed: mathesar_ui/src/pages/record/RecordPageContent.svelte

Technical details

• HTML

  • Table name now rendered as:

    <a href={tablePageUrl} class="table-name-link">
      <TableName {table} truncate={false} />
    </a>

    (rendered inside the existing RichText slot)

• CSS

  • New/updated rules for .table-name-link:
    • default: text-decoration: none; cursor: pointer;
    • hover/active: color: var(--color-table, var(--entity-name-color, var(--color-record))); text-decoration: underline;
    • :focus-visible: outline using color-mix(...) based on the same variable; outline-offset for clarity.

• Accessibility

  • Anchor remains keyboard-focusable. A title and aria-label can be used when desired; the component already supports adding these.

Files modified

• mathesar_ui/src/pages/record/RecordPageContent.svelte

Screenshots

• Before

• After

Checklist

• My pull request has a descriptive title.
• My pull request targets the develop branch of the repository.
• My commit messages follow best practices.
• My code follows the established code style of the repository.
• I tried running the project locally and verified that there are no visible errors.

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