rangeSlider - how to customize the displayed value ?

[cfab]

Hello,
I'm not sure if I set up this correctly but I would like to have a facet that allows to search within the posts by publication date
So here under is what I did (I just kept one other facet as example (lcr_post_theme which is a custom taxonomy). It works, my lcr_post_theme facet and the slider, but the displayed value of the rangeSlider are unix timestamp, how can display maybe only the year, ofrbetter, the full date in a format like this: 2024-08-26
Here is the code, the settings and visual result...
Any help welcome !

add_filter('cm_typesense_schema', function ($schema, $name) {
           if ($name == 'post') {
               $schema['fields'][] = ['name' => 'lcr_post_theme', 'type' => 'string[]', 'optional' => true, 'facet' => true];
               // add a date range filter
               $schema['fields'][] = ['name' => 'publication_date', 'type' => 'int64', 'optional' => true, 'facet' => true];
           }

           return $schema;
       }, 10, 2);

       add_filter('cm_typesense_data_before_entry', function ($formatted_data, $raw_data, $object_id, $schema_name) {
           if ($schema_name == 'post') {
               // theme
               $lcr_post_theme = [];
               $terms = get_the_terms($object_id, 'lcr_post_theme');
               if ($terms) {
                   foreach ($terms as $term) {
                       $lcr_post_theme[] = $term->name;
                   }
               }

               // date should be an int64
               $formatted_data['publication_date'] = strtotime(get_the_date('Y-m-d', $object_id));
               // $formatted_data['publication_date'] = get_the_date('Y-m-d', $object_id); // -> this creates an error while indexing
           }

           return $formatted_data;
       }, 10, 4);

       /** Add the genre option to available index list **/

       add_filter('cm_typesense_available_index_types', function ($available_post_types) {
           $available_post_types['lcr_post_theme'] = ['label' => 'Thèmes', 'value' => 'lcr_post_theme', 'type' => 'taxonomy'];
           // not sure if this needed
           $available_post_types['publication_date'] = ['label' => 'Date de publication', 'value' => 'publication_date', 'type' => 'date'];

           return $available_post_types;
       });

       add_filter('cm_typesense_enabled_taxonomy_for_post_type', function ($taxonomies) {
           $taxonomies[] = 'lcr_post_theme';
           // not sure if this is needed as well
           $taxonomies[] = 'publication_date';

           return $taxonomies;
       });

       add_filter('cm_typesense_filter_type', function ($filterType, $filterName) {
           if ($filterName == 'publication_date') {
               $filterType = 'rangeSlider';
           }

           return $filterType;
       }, 10, 2);



       // add_filter('cm_typesense_search_facet_settings', function ($facet_settings, $facet) {
       //     if ($facet == 'publication_date') {
       // I guess it is here that I may customize somethin gbut how ??

       //     }

       //     return $facet_settings;
       // }, 10, 2);