Return an accurate Account Deactivated error when user is deactivated

[szabozoltan69]

Refers to IFRCGo/go-web-app#855

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Has go-web-app side task also:

app/src/views/Login/index.tsx currently does this on failure:

onFailure: (error) => {
    const { value: { formErrors } } = error;
    setError(transformObjectError(formErrors, () => undefined));
    alert.show(strings.loginFailureMessage, { variant: 'danger' }); // hardcoded, generic
},

app/src/utils/restRequest/go.ts already has logic that recognizes go-api's {statusCode, error_message} shape ("Old Standard Error") and turns it into formErrors.non_field_errors = [error_message] / messageForNotification = error_message. That means our new error_message ("Your account is deactivated...") will already surface via on the form — without any frontend change.

However, error_code (our new 4013) is currently dropped entirely by transformError — it only reads statusCode/error_message, nothing else. So the frontend has no reliable way to branch on it today.

The gap / recommended go-web-app task

Toast is misleading today: alert.show(strings.loginFailureMessage, ...) always shows the same generic hardcoded message regardless of the real reason, while the accurate message only appears in the smaller NonFieldError box. At minimum, this should show error.value.messageForNotification instead of the static string, so the deactivated message is prominent, not just incidental.

(Better) Surface error_code: thread error_code through TransformedError/transformError in go.ts so Login/index.tsx can check error.value.errorCode === 4013 explicitly and render a dedicated message/action (e.g. a clickable mailto:im@ifrc.org link) instead of relying on string matching against English backend text — this also avoids any i18n mismatch since the backend message is English-only.

Add an i18n string (i18n.json) for the "account deactivated" message if they want it localized client-side rather than displaying the raw backend text.

[szabozoltan69]

@frozenhelium – if you have any thoughts about this, welcome!