Fix footer vertical misalignment — zero p margin inside footer-wrap

The <p> wrapping the copyright line had default browser margins (1em top/bottom)
which offset it above the sibling flex items despite align-items: center.

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

web/wwwroot/css/myai.css

@@ -601,6 +601,10 @@ img {
     color: var(--muted)
 }
 
+.footer-wrap p {
+    margin: 0
+}
+
 .footer-links {
     display: flex;
     gap: 18px;