Fixed null positioning on device remove

src/renderer/main/panels/configuration/components/ControlSurface.svelte

@@ -120,13 +120,14 @@
   }
 </script>
 
-<svelte:body on:keydown={handleKeyEvent} on:keyup={handleKeyEvent} />
+<svelte:window on:keydown={handleKeyEvent} on:keyup={handleKeyEvent} />
 
 <!-- svelte-ignore a11y-no-static-element-interactions -->
 <container
   id="surface"
   class="absolute w-full h-full z-[1]"
   on:mouseleave={handleMouseLeave}
   class:pointer-events-none={!trackMouse}
+  class:cursor-grabbing={dragMouse}
   class:cursor-grab={trackMouse}
 />

src/renderer/runtime/runtime.store.js

@@ -930,7 +930,7 @@ function create_runtime() {
       return rt;
     });
 
-    if (_runtime.length === 0) {
+    if (get(_runtime).length === 0) {
       appSettings.update((s) => {
         s.gridLayoutShift = { x: 0, y: 0 };
         return s;