Function isSerializedError

src/app/errorHandler.ts:25–32

* RTK createAsyncThunk serializes thrown errors into plain objects via * miniSerializeError(). These objects have {name, message, stack} but are * NOT Error instances. This type guard identifies them.

(value: unknown)

 * NOT Error instances. This type guard identifies them.
 */
function isSerializedError(value: unknown): value is { message: string } {
    return (
        typeof value === 'object' &&
        value !== null &&
        'message' in value &&
        typeof (value as any).message === 'string'
    );
}

/**
 * Extract a human-readable error message from any error shape.