Add a Verse admin tab that opens versebyversewithnate.us/admin

The site sends X-Frame-Options: SAMEORIGIN, so it cannot be embedded; the tab
and a Home tile open it in its own browser tab. Address is VERSE_URL.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

.env.example

@@ -9,3 +9,4 @@ COOKIE_SECRET=
 AUDIOBOOKS_URL=https://audiobooks.necloud.us
 # First-time passkey enrolment. If unset, a random code is printed in the server log while no passkey exists.
 HUB_SETUP_CODE=
+VERSE_URL=https://versebyversewithnate.us/admin