Nested Groups Fixes

src/lib/components/TerminalTUI.svelte

@@ -83,10 +83,19 @@
 		lastColorMapId = colorMapId;
 	});
 
-	// Get all interactive button indices
+	// Helper to check if a line or its children contain buttons
+	function hasButtons(line: TerminalLine): boolean {
+		if (line.type === 'button') return true;
+		if (line.type === 'group' && line.children) {
+			return line.children.some(child => hasButtons(child));
+		}
+		return false;
+	}
+
+	// Get all interactive button indices (including buttons nested in groups)
 	const buttonIndices = $derived(
 		displayedLines
-			.map((item, i) => item.parsed.line.type === 'button' ? i : -1)
+			.map((item, i) => hasButtons(item.parsed.line) ? i : -1)
 			.filter(i => i !== -1)
 	);