Switch to double quotes and reformat codebase with Biome

packages/app/src/desktop/pick-directory.ts

@@ -1,23 +1,23 @@
-import { getDesktopHost } from '@/desktop/host'
+import { getDesktopHost } from "@/desktop/host";
 
 export async function pickDirectory(): Promise<string | null> {
-  const open = getDesktopHost()?.dialog?.open
-  if (typeof open !== 'function') {
-    throw new Error('Desktop dialog open() is unavailable in this environment.')
+  const open = getDesktopHost()?.dialog?.open;
+  if (typeof open !== "function") {
+    throw new Error("Desktop dialog open() is unavailable in this environment.");
   }
 
   const selection = await open({
     directory: true,
     multiple: false,
-  })
+  });
 
   if (selection === null) {
-    return null
+    return null;
   }
 
-  if (typeof selection === 'string') {
-    return selection
+  if (typeof selection === "string") {
+    return selection;
   }
 
-  throw new Error('Unexpected directory picker response.')
+  throw new Error("Unexpected directory picker response.");
 }