Internal scoreboard: add category filter

app/views/contests/show.html.slim

@@ -42,17 +42,38 @@ javascript:
             | + #{t("helpers.buttons.add")}
           a.ms-2.btn-sm.btn.btn-primary href=contest_import_path(@contest) style="margin-top: -3px"
             | #{t("helpers.buttons.import")}
+    - if @contest.categories.size > 0
+      .row
+        .col
+          select.mt-2.mb-2 id="categories" style="padding: 5px"
+            option value=-1
+              | Tous.tes les participant.e.s
+            option value=-2
+              | Participant.e.s sans catégorie
+            - @contest.categories.each do |category|
+              option value=category.id
+                = category.name
+          javascript:
+            const select = document.getElementById('categories');
+            const urlParams = new URLSearchParams(window.location.search);
+            const selectedCategory = urlParams.get('category');
+            Array.from(select.children).forEach((option) => {
+              if (option.value == selectedCategory) option.selected = true;
+            });
+            select.addEventListener('change', (e) => {
+              window.location.href = `#{contest_path(@contest)}?category=${e.target.value}`
+            })
     .d-flex.flex-column style="overflow-y: auto"
       table.table.table-striped.table-hover
         thead
           tr
-            th scope="col"
+            th
               = t("helpers.rank")
-            th scope="col"
+            th
               = t("activerecord.attributes.contestant.name")
-            th scope="col"
+            th
               = t("activerecord.attributes.contestant.completions")
-            th scope="col"
+            th
               = t("activerecord.attributes.contestant.display_time")
         tbody
           - @contestants.each_with_index do |contestant, index|
@@ -144,4 +165,4 @@ javascript:
                     - else
                       a.btn.btn-sm.btn-secondary.disabled href=contest_message_convert_path(@contest, message) style="white-space: nowrap;"
                         = t("helpers.buttons.add_completion")
-                    = link_to t("helpers.buttons.delete"), contest_message_path(@contest, message), data: { turbo_method: :delete }, class: "btn btn-sm btn-danger ms-2"
+                    = link_to "x", contest_message_path(@contest, message), data: { turbo_method: :delete }, class: "btn btn-sm btn-danger ms-2"