cockpit: show both AP bands with per-band restart

vanrouter.js hardcoded the 5GHz iface; generalize to an APS list
(iface + hostapd unit + band label). The Access Points card now renders
a status line, client table, and Restart button per band, and the WAN
table excludes both AP ifaces.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

cockpit/vanrouter/index.html

@@ -16,10 +16,7 @@
         </div>
 
         <div class="card">
-            <div class="card-head">
-                <h3>Access Point</h3>
-                <button id="ap-restart" class="btn">Restart AP</button>
-            </div>
+            <h3>Access Points</h3>
             <div id="ap"></div>
         </div>