fix: hide drawer completely off-screen on mobile (right: -100vw)

frontend/index.html

@@ -248,7 +248,7 @@
         #asset-drawer {
             position: fixed;
             top: 0;
-            right: -320px;
+            right: -100vw;
             width: 320px;
             max-width: 92vw;
             height: 100vh;