fix(server): update email verified at oauth (#13714)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

* **New Features**
* Automatic email verification when signing in or reconnecting with a
linked OAuth provider: if the provider confirms the same email and your
account was unverified, your email will be marked as verified
automatically.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

packages/backend/server/src/plugins/oauth/controller.ts

@@ -221,6 +221,15 @@ export class OAuthController {
     if (connectedAccount) {
       // already connected
       await this.updateConnectedAccount(connectedAccount, tokens);
+
+      if (
+        !connectedAccount.user.emailVerifiedAt &&
+        // external email may change, check if it matches exists email
+        externalAccount.email.toLowerCase() ===
+          connectedAccount.user.email.toLowerCase()
+      ) {
+        await this.auth.setEmailVerified(connectedAccount.userId);
+      }
       return connectedAccount.user;
     }