fix: improve Android orientation detection in signature overlay

src/components/SignatureOverlay.tsx

@@ -11,7 +11,8 @@ interface SignatureOverlayProps {
 }
 
 const isLandscapeNow = () =>
-  typeof window !== 'undefined' && window.matchMedia('(orientation: landscape)').matches;
+  typeof window !== 'undefined' &&
+  (window.matchMedia('(orientation: landscape)').matches || window.innerWidth > window.innerHeight);
 
 function SignatureOverlay({ open, onCancel, onConfirm }: SignatureOverlayProps) {
   const padRef = useRef<SignaturePadHandle>(null);
@@ -22,9 +23,15 @@ function SignatureOverlay({ open, onCancel, onConfirm }: SignatureOverlayProps)
     if (!open) return;
 
     const mq = window.matchMedia('(orientation: landscape)');
-    const update = () => setLandscape(mq.matches);
+    const update = () => setLandscape(mq.matches || window.innerWidth > window.innerHeight);
     update();
+    if (typeof mq.addEventListener === 'function') {
       mq.addEventListener('change', update);
+    } else {
+      mq.addListener(update);
+    }
+    window.addEventListener('resize', update);
+    window.addEventListener('orientationchange', update);
 
     const orientation = (screen as Screen & {
       orientation?: { lock?: (o: string) => Promise<void>; unlock?: () => void };
@@ -39,7 +46,13 @@ function SignatureOverlay({ open, onCancel, onConfirm }: SignatureOverlayProps)
     document.body.style.overflow = 'hidden';
 
     return () => {
+      if (typeof mq.removeEventListener === 'function') {
         mq.removeEventListener('change', update);
+      } else {
+        mq.removeListener(update);
+      }
+      window.removeEventListener('resize', update);
+      window.removeEventListener('orientationchange', update);
       document.body.style.overflow = prevOverflow;
       orientation?.unlock?.();
     };