fix: await upend visit, contentType isn't array

webext/src/App.svelte

@@ -7,7 +7,7 @@
 
   const api = new UpEndApi("http://localhost:8093");
 
-  let visitngUpEnd = false;
+  let visitingUpEnd = false;
 
   let opening = false;
   let openError: string | undefined;
@@ -46,13 +46,12 @@
   let currentUrl: string | undefined;
   let contentType: string | undefined;
   onMount(async () => {
-    browser.tabs
-      .executeScript(undefined, {
-        code: `document.querySelector('meta[name="application-name"]')?.content`,
-      })
-      .then((result) => {
-        visitngUpEnd = (result[0] as string | undefined) === "UpEnd";
-      });
+    visitingUpEnd =
+      (
+        await browser.tabs.executeScript(undefined, {
+          code: `document.querySelector('meta[name="application-name"]')?.content`,
+        })
+      )[0] === "UpEnd";
 
     currentUrl = await getCurrentUrl();
 
@@ -62,9 +61,11 @@
       }
     });
 
-    contentType = (await browser.tabs.executeScript(undefined, {
-      code: "document.contentType",
-    })) as unknown as string | undefined;
+    contentType = (
+      await browser.tabs.executeScript(undefined, {
+        code: "document.contentType",
+      })
+    )[0];
   });
 
   enum PRIMARY_TYPE {
@@ -221,7 +222,7 @@
 </script>
 
 <main>
-  {#if !visitngUpEnd}
+  {#if !visitingUpEnd}
     <div class="primary-controls">
       <button
         class="button"