[auth] handle auth/requires-recent-login for account deletion and password updates (#6109)

## Summary

Implemented error recovery system to handle Firebase
`auth/requires-recent-login` errors when deleting accounts or updating
passwords.


https://github.com/user-attachments/assets/92a79e2a-cff5-4b18-b529-dbaf5f2303f2

## Changes

- **What**: Added [ErrorRecoveryStrategy
pattern](https://firebase.google.com/docs/auth/web/manage-users#re-authenticate_a_user)
to `useErrorHandling` composable with automatic retry logic for
sensitive Firebase operations
- **Breaking**: None - recovery strategies are optional, all existing
code unchanged

## Technical Details

Firebase enforces
[reauthentication](https://firebase.google.com/docs/reference/js/auth#autherrorcodes)
for security-sensitive operations (account deletion, password changes)
after ~5 minutes of inactivity. Previously these operations failed with
cryptic error messages.

New flow:
1. Operation throws `auth/requires-recent-login`
2. Recovery strategy shows confirmation dialog
3. User logs out and re-authenticates
4. Operation automatically retries

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-6109-auth-handle-auth-requires-recent-login-for-account-deletion-and-password-updates-28f6d73d36508119abf4ce30eecea976)
by [Unito](https://www.unito.io)

src/locales/en/main.json

@@ -1864,6 +1864,12 @@
       "success": "Account Deleted",
       "successDetail": "Your account has been successfully deleted."
     },
+    "reauthRequired": {
+      "title": "Re-authentication Required",
+      "message": "For security reasons, this action requires you to sign in again. Would you like to proceed?",
+      "confirm": "Sign In Again",
+      "cancel": "Cancel"
+    },
     "loginButton": {
       "tooltipHelp": "Login to be able to use \"API Nodes\"",
       "tooltipLearnMore": "Learn more..."