appview: point the footer Bluesky link at the DID

Handles can change; the DID cannot. Linking the DID keeps the footer
correct if the account's handle is ever reassigned.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

pkg/appview/templates/components/footer.html

@@ -6,7 +6,7 @@
         <span aria-hidden="true" class="text-base-content/30">·</span>
         <a href="/terms" class="link link-hover">Terms</a>
         <span aria-hidden="true" class="text-base-content/30">·</span>
-        <a href="https://bsky.app/profile/atcr.io" target="_blank" rel="noopener" aria-label="{{ .ClientShortName }} on Bluesky" class="link link-hover inline-flex items-center gap-1">
+        <a href="https://bsky.app/profile/did:plc:wfj5kyialpmcv2fzk6uqwsln" target="_blank" rel="noopener" aria-label="{{ .ClientShortName }} on Bluesky" class="link link-hover inline-flex items-center gap-1">
             <svg aria-hidden="true" class="size-3.5" xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 568 501"><path fill="currentColor" d="M123.121 33.664C188.241 82.553 258.281 181.68 284 234.873c25.719-53.192 95.759-152.32 160.879-201.21C491.866-1.611 568-28.906 568 57.947c0 17.346-9.945 145.713-15.778 166.555-20.275 72.453-94.155 90.933-159.875 79.748C507.222 323.8 536.444 388.56 473.333 453.32c-119.86 122.992-172.272-30.859-185.702-70.281-2.462-7.227-3.614-10.608-3.631-7.733-.017-2.875-1.169.506-3.631 7.733-13.43 39.422-65.842 193.273-185.702 70.281-63.111-64.76-33.89-129.52 80.986-149.071-65.72 11.185-139.6-7.295-159.875-79.748C9.945 203.659 0 75.291 0 57.946 0-28.906 76.135-1.612 123.121 33.664Z"/></svg>
             Bluesky
         </a>