diff --git a/index.html b/index.html
index c394211..02f868f 100644
--- a/index.html
+++ b/index.html
@@ -851,6 +851,7 @@
 				<button class="pysim-subtab px-3 py-1 text-xs rounded-full bg-gray-200 dark:bg-slate-700 text-gray-700 dark:text-slate-300 hover:bg-gray-300 dark:hover:bg-slate-600" data-pysim-sub="custom">Custom files</button>
 			<button class="pysim-subtab px-3 py-1 text-xs rounded-full bg-gray-200 dark:bg-slate-700 text-gray-700 dark:text-slate-300 hover:bg-gray-300 dark:hover:bg-slate-600" data-pysim-sub="cmd">pySim command line</button>
 			<button class="pysim-subtab px-3 py-1 text-xs rounded-full bg-gray-200 dark:bg-slate-700 text-gray-700 dark:text-slate-300 hover:bg-gray-300 dark:hover:bg-slate-600" data-pysim-sub="apdu">Raw APDU</button>
+			<button id="stk-menu-btn" onclick="stkMenuOpen()" class="pysim-subtab px-3 py-1 text-xs rounded-full bg-emerald-600 text-white hover:bg-emerald-700" style="display:none">STK: <span id="stk-menu-title"></span></button>
 		</div>
 
 		<div id="pysim-sub-files">
@@ -913,8 +914,24 @@
 		</div>
 	</div>
 
+	<div id="stk-menu-panel" class="fixed inset-0 bg-black/50 z-50 flex items-center justify-center hidden">
+		<div class="bg-white dark:bg-slate-800 rounded-lg p-4 max-w-md w-full max-h-[80vh] flex flex-col">
+			<div id="stk-menu-warning" class="hidden mb-2 text-xs text-amber-600 dark:text-amber-400 text-center bg-amber-50 dark:bg-amber-900/30 rounded px-2 py-1">Menu session blocks all other commands, click Cancel/Exit to leave menu and unblock</div>
+			<div class="flex justify-between items-center mb-3">
+				<button id="stk-back-btn" onclick="stkMenuRespond('back')" class="px-3 py-1 text-xs rounded-full bg-gray-200 dark:bg-slate-700 text-gray-700 dark:text-slate-300 hover:bg-gray-300 dark:hover:bg-slate-600" disabled>← Back</button>
+				<span id="stk-menu-panel-title" class="font-bold text-sm"></span>
+				<button id="stk-cancel-btn" onclick="stkMenuRespond('cancel')" class="px-3 py-1 text-xs rounded-full bg-red-100 dark:bg-red-900/30 text-red-700 dark:text-red-400 hover:bg-red-200 dark:hover:bg-red-900/50">Cancel/Exit</button>
+			</div>
+			<div id="stk-menu-panel-content" class="flex-1 overflow-auto"></div>
+			<div id="stk-menu-buttons" class="flex justify-between mt-3 pt-3 border-t border-gray-200 dark:border-slate-700 hidden">
+				<button onclick="stkMenuRespond('timeout')" class="px-3 py-1 text-xs rounded-full bg-gray-200 dark:bg-slate-700 text-gray-700 dark:text-slate-300 hover:bg-gray-300 dark:hover:bg-slate-600">Timeout</button>
+				<button onclick="stkMenuRespond('ok')" class="px-4 py-1 text-xs rounded-full bg-blue-600 text-white hover:bg-blue-700">OK</button>
+			</div>
+		</div>
 	</div>
 
+</div>
+
 <script>
 // ===== Tab switching =====
 function switchTab(name) {
@@ -2543,7 +2560,8 @@ async function pysimConnect() {
 			pysimSetConnected(false);
 			statusEl.innerHTML = '<span class="text-red-500">No card detected. Insert card and click Equip card button</span>';
 			pysimShowConnected(true);
-			btn.textContent = 'Connected';
+		btn.textContent = 'Connected';
+		stkCheckMenu();
 			btn.disabled = false;
 			return;
 		}
@@ -2720,6 +2738,138 @@ async function pysimSendOta() {
 	}
 }
 
+// ===== STK Menu Browser =====
+let stkMenuStack = [];
+
+async function stkCheckMenu() {
+	try {
+		const data = await pysimFetch('/api/menu');
+		const btn = document.getElementById('stk-menu-btn');
+		if (data && data.title && data.items && data.items.length) {
+			document.getElementById('stk-menu-title').textContent = data.title;
+			btn.style.display = '';
+		} else {
+			btn.style.display = 'none';
+		}
+	} catch (e) {}
+}
+
+function stkSetPillsDisabled(disabled) {
+	document.querySelectorAll('.pysim-subtab').forEach(b => {
+		if (b.id === 'stk-menu-btn') return;
+		b.disabled = disabled;
+		b.classList.toggle('opacity-50', disabled);
+	});
+}
+
+function stkMenuOpen() {
+	const menu = document.getElementById('stk-menu-btn');
+	document.getElementById('stk-menu-panel-title').textContent = document.getElementById('stk-menu-title').textContent;
+	document.getElementById('stk-menu-warning').classList.remove('hidden');
+	stkSetPillsDisabled(true);
+	stkMenuStack = [];
+	document.getElementById('stk-back-btn').disabled = true;
+	document.getElementById('stk-menu-buttons').classList.remove('hidden');
+	document.getElementById('stk-menu-panel').classList.remove('hidden');
+	stkMenuRenderItems();
+}
+
+function stkMenuClose() {
+	document.getElementById('stk-menu-panel').classList.add('hidden');
+	stkSetPillsDisabled(false);
+	document.getElementById('stk-menu-warning').classList.add('hidden');
+}
+
+function stkMenuRenderItems() {
+	const content = document.getElementById('stk-menu-panel-content');
+	content.innerHTML = '<span class="text-gray-500 text-sm">Loading...</span>';
+	pysimFetch('/api/menu').then(data => {
+		if (!data || !data.items) { content.innerHTML = '<span class="text-red-500 text-sm">No menu data</span>'; return; }
+		let html = '<div class="space-y-1">';
+		data.items.forEach(item => {
+			html += '<div class="flex items-center gap-2 px-2 py-1.5 rounded hover:bg-gray-100 dark:hover:bg-slate-700 cursor-pointer" onclick="stkMenuItemClick(' + item.id + ')"><span class="w-5 text-xs font-bold text-gray-400 text-right">' + item.id + '</span><span class="text-sm">' + esc(item.text) + '</span></div>';
+		});
+		html += '</div>';
+		content.innerHTML = html;
+	}).catch(() => { content.innerHTML = '<span class="text-red-500 text-sm">Error loading menu</span>'; });
+}
+
+async function stkMenuItemClick(itemId) {
+	stkSetPillsDisabled(true);
+	const content = document.getElementById('stk-menu-panel-content');
+	content.innerHTML = '<span class="text-gray-500 text-sm">Sending...</span>';
+	try {
+		const data = await pysimFetch('/api/menu-select', { item_id: itemId });
+		stkMenuHandleResponse(data);
+	} catch (e) {
+		content.innerHTML = '<span class="text-red-500 text-sm">Error: ' + esc(e.message) + '</span>';
+		stkSetPillsDisabled(false);
+	}
+}
+
+function stkMenuHandleResponse(data) {
+	const content = document.getElementById('stk-menu-panel-content');
+	const backBtn = document.getElementById('stk-back-btn');
+	if (data.type === 'display_text') {
+		content.innerHTML = '<div class="text-sm whitespace-pre-wrap p-2 bg-gray-50 dark:bg-slate-700 rounded">' + esc(data.text) + '</div>';
+		backBtn.disabled = stkMenuStack.length === 0;
+	} else if (data.type === 'select_item') {
+		stkMenuStack.push(data.items);
+		content.innerHTML = '';
+		const items = data.items;
+		let html = '<div class="space-y-1">';
+		items.forEach(item => {
+			html += '<div class="flex items-center gap-2 px-2 py-1.5 rounded hover:bg-gray-100 dark:hover:bg-slate-700 cursor-pointer" onclick="stkSubItemClick(' + item.id + ')"><span class="w-5 text-xs font-bold text-gray-400 text-right">' + item.id + '</span><span class="text-sm">' + esc(item.text) + '</span></div>';
+		});
+		html += '</div>';
+		content.innerHTML = html;
+		backBtn.disabled = false;
+	} else {
+		content.innerHTML = '<span class="text-gray-500 text-sm">Done</span>';
+		stkSetPillsDisabled(false);
+		backBtn.disabled = stkMenuStack.length === 0;
+	}
+}
+
+async function stkSubItemClick(itemId) {
+	const content = document.getElementById('stk-menu-panel-content');
+	content.innerHTML = '<span class="text-gray-500 text-sm">Sending...</span>';
+	try {
+		const data = await pysimFetch('/api/menu-respond', { result: 'ok', item_id: itemId });
+		stkMenuHandleResponse(data);
+	} catch (e) {
+		content.innerHTML = '<span class="text-red-500 text-sm">Error: ' + esc(e.message) + '</span>';
+	}
+}
+
+async function stkMenuRespond(result) {
+	try {
+		const data = await pysimFetch('/api/menu-respond', { result: result });
+		if (result === 'cancel') {
+			stkMenuClose();
+			return;
+		}
+		if (result === 'back') {
+			if (stkMenuStack.length > 0) {
+				const prev = stkMenuStack.pop();
+				const content = document.getElementById('stk-menu-panel-content');
+				content.innerHTML = '';
+				let html = '<div class="space-y-1">';
+				prev.forEach(item => {
+					html += '<div class="flex items-center gap-2 px-2 py-1.5 rounded hover:bg-gray-100 dark:hover:bg-slate-700 cursor-pointer" onclick="stkSubItemClick(' + item.id + ')"><span class="w-5 text-xs font-bold text-gray-400 text-right">' + item.id + '</span><span class="text-sm">' + esc(item.text) + '</span></div>';
+				});
+				html += '</div>';
+				content.innerHTML = html;
+				document.getElementById('stk-back-btn').disabled = stkMenuStack.length === 0;
+			}
+			return;
+		}
+		stkMenuHandleResponse(data);
+	} catch (e) {
+		document.getElementById('stk-menu-panel-content').innerHTML = '<span class="text-red-500 text-sm">Error: ' + esc(e.message) + '</span>';
+	}
+}
+
 // ===== pysim sub-tabs =====
 let pysimCmdHistory = [];
 let pysimCmdHistIdx = -1;