Add web network failure error detection (close APP-83) (#537)

src/lib/strings/errors.ts

@@ -19,5 +19,9 @@ export function cleanError(str: any): string {
 
 export function isNetworkError(e: unknown) {
   const str = String(e)
-  return str.includes('Abort') || str.includes('Network request failed')
+  return (
+    str.includes('Abort') ||
+    str.includes('Network request failed') ||
+    str.includes('Failed to fetch')
+  )
 }