Update status checks and add optgroup support to form modals

- modal.js: add optgroup support for select options in formModal
- dhcp.js: use zone-based interface selector for DHCP ranges
- dashboard.js, wireguard.js: use status.up for state checks
- proxy.js: use inner.querySelector for modal field lookup

webui/static/pages/wireguard.js

@@ -61,7 +61,7 @@ export default definePage({
         if (guard) return guard;
 
         const st = state.wireguard.data?.status || {};
-        const isUp = st.state === 'up';
+        const isUp = st.up || false;
         const listenPort = (state.wireguard.data?.config?.interface || {}).listen_port || '-';
 
         const peerRows = (state.wireguard.data?.peers || []).map(p => {
@@ -107,10 +107,10 @@ export default definePage({
         return [
             PageHeader({
                 title: 'WireGuard',
-                subtitle: 'Tunnel: ' + (st.state || 'unknown') + ', Listen: ' + listenPort,
+                subtitle: 'Tunnel: ' + (st.up ? 'up' : 'down') + ', Listen: ' + listenPort,
                 actions,
             }),
-            ServiceStatus({ state: st.state || 'down' }),
+            ServiceStatus({ state: st.up ? 'up' : 'down' }),
             peerRows.length
                 ? Table({
                     columns: ['Peer', 'Public Key', 'Allowed IPs', 'Endpoint', 'Handshake', 'Transfer', 'Actions'],