Re-check key backup after bootstrapSecretStorage (#3692)

Fixes https://github.com/vector-im/element-web/issues/26115

spec/unit/crypto/secrets.spec.ts

@@ -312,6 +312,7 @@ describe("Secrets", function () {
                 this.emit(ClientEvent.AccountData, event);
                 return {};
             };
+            bob.getKeyBackupVersion = jest.fn().mockResolvedValue(null);
 
             await bob.bootstrapCrossSigning({
                 authUploadDeviceSigningKeys: async (func) => {

src/crypto/EncryptionSetup.ts

@@ -228,6 +228,8 @@ export class EncryptionSetupOperation {
                     prefix: ClientPrefix.V3,
                 });
             }
+            // tell the backup manager to re-check the keys now that they have been (maybe) updated
+            await crypto.backupManager.checkKeyBackup();
         }
     }
 }