feat: add gateway setup wizard and fix test suite

New zt-gateway-setup script with subcommands for configuring this
router as a ZeroTier exit gateway: bridge, routing (tables 100/101),
DHCP, hotplug, and persistence. Exposes setup ubus method via backend
with ACL and LuCI panel in overview.

Also fixes two pre-existing test issues:
- overview.spec.ts: active gateway radio is intentionally enabled
  (users need to re-trigger switch for the already-selected gateway)
- drain.spec.ts: stubs drain status via page.route() since Docker
  has no real conntrack entries; fixed Playwright glob pattern bug
  where **/ubus* fails to match /ubus/?timestamp (regex needed)

htdocs/luci-static/resources/view/zt-gateway/overview.js

@@ -47,6 +47,14 @@ function ubusCancelDrain() {
 		params: []
 	})();
 }
+function ubusSetup(command) {
+	return rpc.declare({
+		object: UBUS_NAMESPACE,
+		method: 'setup',
+		params: ['command']
+	})(command);
+}
+
 
 return view.extend({
 	state: {
@@ -78,7 +86,6 @@ return view.extend({
 				value: gw.region,
 				change: ev => this.onSelectRegion(ev.target.value),
 				checked: isSelected || null,
-				disabled: isActive || null
 			})),
 			E('td', { class: 'zt-region-cell' }, [
 				this.renderHealthDot(false, null),
@@ -125,6 +132,53 @@ return view.extend({
 			}, _('Cancel drain (force switch)'))
 		]);
 	},
+	renderSetupPanel() {
+		const commands = [
+			{ cmd: 'setup-bridge', label: _('Setup Bridge'), desc: _('Create br-zt bridge interface') },
+			{ cmd: 'setup-routing', label: _('Setup Routing'), desc: _('Configure policy routing tables') },
+			{ cmd: 'setup-dhcp', label: _('Setup DHCP'), desc: _('Configure DHCP for WIBLAN subnet') },
+			{ cmd: 'setup-hotplug', label: _('Setup Hotplug'), desc: _('Create hotplug script for route persistence') },
+			{ cmd: 'setup-persistence', label: _('Setup Persistence'), desc: _('Write rc.local + UCI routes') },
+			{ cmd: 'setup-all', label: _('Run Full Setup'), desc: _('Configure everything at once') }
+		];
+
+		const btns = commands.map(c =>
+			E('button', {
+				class: 'cbi-button',
+				'data-cmd': c.cmd,
+				title: c.desc,
+				click: ev => this.onSetupCommand(ev, c.cmd)
+			}, c.label)
+		);
+
+		return E('div', { class: 'zt-setup-panel' }, [
+			E('h4', {}, _('Gateway Setup')),
+			E('p', {}, _('Configure this router as a ZeroTier exit gateway. Run individual steps or "Run Full Setup" to configure everything.')),
+			E('div', { class: 'zt-setup-buttons' }, btns)
+		]);
+	},
+
+	async onSetupCommand(ev, command) {
+		const btn = ev.target;
+		btn.disabled = true;
+		const oldLabel = btn.textContent;
+		btn.textContent = _('Running...');
+
+		try {
+			const res = await ubusSetup(command);
+			if (res && res.success) {
+				ui.addNotification(null, E('p', {}, '%s: %s'.format(command, res.message || _('Done.'))));
+			} else {
+				ui.addNotification(null, E('p', {}, '%s: %s'.format(command, (res && res.message) || _('Failed.'))));
+			}
+		} catch (err) {
+			ui.addNotification(null, E('p', {}, _('RPC error: ') + (err.message || err)));
+		} finally {
+			btn.disabled = false;
+			btn.textContent = oldLabel;
+		}
+	},
+
 
 	renderActiveSummary(data) {
 		const region = data.active_gateway || _('none');
@@ -275,7 +329,8 @@ return view.extend({
 					}, _('Switch to selected'))
 				])
 			]),
-			this.renderDrainPanel(data)
+			this.renderDrainPanel(data),
+			this.renderSetupPanel()
 		];
 	},
 
@@ -305,7 +360,12 @@ return view.extend({
 			'.zt-gateways tbody tr{line-height:1.8}' +
 			'.zt-mode-group{display:flex;gap:0.5em;align-items:center;flex-wrap:wrap}' +
 			'.zt-active-summary{margin:0.5em 0 1em 0}' +
-			'.zt-drain-panel{margin-top:1em;padding:0.75em;background:#f8f8f8;border:1px solid #ddd}';
+			'.zt-drain-panel{margin-top:1em;padding:0.75em;background:#f8f8f8;border:1px solid #ddd}' +
+			'.zt-setup-panel{margin-top:1.5em;padding:0.75em;background:#f0f7ff;border:1px solid #b8d4e8}' +
+			'.zt-setup-buttons{display:flex;gap:0.5em;flex-wrap:wrap;margin-top:0.5em}' +
+			'.zt-setup-buttons .cbi-button{min-width:140px}' +
+			'.zt-setup-panel h4{margin-top:0}' +
+			'.zt-setup-panel p{margin:0.5em 0;color:#555}';
 		const style = document.createElement('style');
 		style.id = 'zt-gateway-css';
 		style.textContent = css;