Support multi-paragraph host bios on detail page; v2.0.23

Split bio on blank lines to render each paragraph as its own <p> tag.
Also grows the admin textarea from 3 to 8 rows so long bios are easier
to write and review.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/App.tsx

@@ -2023,7 +2023,9 @@ function NuggetsHostDetailPage({ content }: { content: SiteContent }) {
             )}
           </div>
           <div className="nuggets-host-detail-body">
-            {host.bio && <p className="nuggets-host-detail-bio">{host.bio}</p>}
+            {host.bio && host.bio.split(/\n\n+/).map((para, i) => (
+              <p key={i} className="nuggets-host-detail-bio">{para.replace(/\n/g, ' ')}</p>
+            ))}
             {(nuggets.spotifyUrl || nuggets.appleUrl) && (
               <div className="nuggets-host-detail-listen">
                 <p className="eyebrow" style={{ marginBottom: '0.75rem' }}>Listen to {nuggets.title}</p>