After create/update via resource relation, redirect back to that resource and scroll the relations table into view.

[LiamKarlMitchell]

We can define our own logic for redirection however, it does not seem easily possible to scroll back to where the user was previously viewing the page from such as the relation table.

If may also be nice if the create/update button could persist the viaRelation and viaRelationId etc query parameters getting them from referer url might not be best.

The code is simpler if can just pull them from $request->query('viaResource').

Something like this seems to work, but would not scroll down to where the user previously was.
And not sure about other issues that may arise from using parse_url and parse_str.

    /**
     * Return the location to redirect the user after creation.
     *
     * @param NovaRequest $request
     * @param \Laravel\Nova\Resource $resource
     * @return URL|string
     */
    public static function redirectAfterCreate(NovaRequest $request, $resource): URL|string
    {
        return static::redirectBackViaRefererResource($request, $resource);
    }

    /**
     * Return location to redirect user to after create or update via another resource.
     *
     * @param NovaRequest $request
     * @param \Laravel\Nova\Resource $resource
     * @return URL|string
     */
    private static function redirectBackViaRefererResource(NovaRequest $request, $resource): URL|string
    {
        $refererUrl = $request->header('referer');
        if (filled($refererUrl)) {
            $queryString = parse_url($refererUrl, PHP_URL_QUERY);
            parse_str($queryString, $queryParameters);
            $viaResource = $queryParameters['viaResource'] ?? null;
            $viaResourceId = $queryParameters['viaResourceId'] ?? null;
            if ($viaResource === 'things' && filled($viaResourceId)) {
                return '/resources/' . $viaResource . '/' . $queryParameters['viaResourceId'];
            }
        }
        return '/resources/' . static::uriKey() . '/' . $resource->getKey();
    }

    /**
     * Return the location to redirect the user after update.
     *
     * @param NovaRequest $request
     * @param \Laravel\Nova\Resource $resource
     * @return URL|string
     */
    public static function redirectAfterUpdate(NovaRequest $request, $resource): URL|string
    {
        return static::redirectBackViaRefererResource($request, $resource);
    }

Perhaps this could be built-in as a configurable behaviour on the relation on the parent resource?