Fix the Family tab in Settings being removed as empty

- Give the section a Loading line so the tab cleanup keeps it until its content fills in

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

public/settings.js

@@ -98,7 +98,7 @@ function viewSettings() {
       <label for="ab-p">Password</label>
       <input type="password" id="ab-p" autocomplete="new-password" value="${esc(abCreds().p)}"></div>
     </div></div>
-    <div class="sgroup" data-g="family"><div id="famset"></div></div>
+    <div class="sgroup" data-g="family"><div id="famset"><p class="sub">Loading…</p></div></div>
     <div class="sgroup" data-g="security"><h2>Passkeys</h2><div class="list" id="pks"><div class="row"><span class="grow"><small>Loading…</small></span></div></div>
     <div class="bar"><button class="btn ghost" id="addpk">Add a passkey</button><button class="btn ghost" id="invpk">Invite a device</button><button class="btn danger" id="hubout">Sign out of NE Hub</button></div>
     <h2>Recovery codes</h2><div class="list"><div class="row"><span class="grow"><b id="rcn">Checking…</b><small style="white-space:normal">One-time codes that let you add a new passkey if you lose every device. Keep them somewhere safe (a password manager or on paper).</small></span><button class="btn ghost" id="rcgen">Make codes</button></div></div>

public/sw.js

@@ -1,5 +1,5 @@
 // App-shell cache only; Seafile/API traffic always goes to the network.
-const CACHE = 'hub-v80';
+const CACHE = 'hub-v81';
 const SHARE = 'hub-share'; // files shared into the app from other apps, held until the person picks a folder
 const SHELL = ['/icon.svg', '/manifest.webmanifest', '/icons/icon-192.png', '/icons/apple-touch-icon.png'];