fix io draw in mobile client (#3160)

qt/aqt/mediasrv.py

@@ -334,6 +334,7 @@ def is_sveltekit_page(path: str) -> bool:
         "import-anki-package",
         "import-csv",
         "import-page",
+        "image-occlusion",
     ]
 
 

ts/routes/image-occlusion/Toolbar.svelte

@@ -141,6 +141,7 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
 
     // initializes lastPosX and lastPosY because it is undefined in touchmove event
     function onTouchstart(event: TouchEvent) {
+        const canvas = globalThis.canvas;
         canvas.lastPosX = event.touches[0].clientX;
         canvas.lastPosY = event.touches[0].clientY;
     }