catch more errors if something catastrophic happens to encrypted data

src/router/index.ts

@@ -18,6 +18,7 @@ const enterOrStart = async (
   from: RouteLocationNormalized,
   next: NavigationGuardNext,
 ) => {
+  // one of the few times we use accountsDBPromise directly; try to avoid more usage
   const accountsDB = await accountsDBPromise;
   const num_accounts = await accountsDB.accounts.count();
   if (num_accounts > 0) {
@@ -263,6 +264,9 @@ const errorHandler = (
 ) => {
   // Handle the error here
   console.error("Caught in top level error handler:", error, to, from);
+  alert(
+    "Something is very wrong. We'd love if you contacted us and let us know how you got here. Thank you!",
+  );
 
   // You can also perform additional actions, such as displaying an error message or redirecting the user to a specific page
 };