Add viewer-range categories, nomination tracking, dynamic showact form, session timeout, share URLs, and workflow-per-season

Features:
- Category viewer ranges + subcategory templates (admin group modal, tree workspace)
- Nomination enrichment via TwitchTracker API (NominationEnrichmentService,
  TwitchTrackerViewerStatsProvider) with admin tracking rules editor
- Nomination group tracker: CategoryGroupName as primary identifier,
  CategoryId stays as nullable legacy field; StreamerIdentity table
- Dynamic showact application form builder (AdminShowactFormBuilder,
  ShowactApplicationSchedule)
- Session idle timeout setting (AdminSessionTimeoutCard)
- Share URLs for X and Discord (SiteSettings, public extras)
- Workflow rules now stored per season (falls back to global SiteSettings)
- New admin routes: settings/access, settings/workflows, tracking-rules
- New admin review workspace with subcategory tabs
- AdminCategoriesView rebuilt with group/subcategory modals

Migrations (all additive):
- AddShareUrls, AddShowactDynamicForm, AddCategoryViewerRanges,
  AddSessionIdleTimeoutSettings, AddSeasonSubcategoryTemplates,
  AddNominationGroupTrackerIdentity, AddShowactApplicationSchedule,
  AddSeasonWorkflowRulesJson

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend/src/components/ui/NativeSelect.vue

@@ -35,29 +35,29 @@
     </button>
 
     <Teleport to="body">
-    <div v-if="open" :id="listboxId" class="native-select__menu" :style="menuStyle" role="listbox">
-      <template v-for="(option, index) in options" :key="optionKey(option.value)">
-        <p v-if="option.group && option.group !== options[index - 1]?.group" class="native-select__group">
-          {{ option.group }}
-        </p>
-        <button
-          type="button"
-          class="native-select__option"
-          :class="{
-            'native-select__option--active': index === activeIndex,
-            'native-select__option--selected': isSelected(option),
-          }"
-          :disabled="option.disabled"
-          role="option"
-          :aria-selected="isSelected(option)"
-          @mouseenter="setActiveIndex(index)"
-          @click="selectOption(option)"
-        >
-          <span class="native-select__option-label">{{ option.label }}</span>
-          <Check v-if="isSelected(option)" class="native-select__check" :size="18" :stroke-width="3" />
-        </button>
-      </template>
-    </div>
+      <div v-if="open" ref="menuEl" :id="listboxId" class="native-select__menu" :style="menuStyle" role="listbox">
+        <template v-for="(option, index) in options" :key="optionKey(option.value)">
+          <p v-if="option.group && option.group !== options[index - 1]?.group" class="native-select__group">
+            {{ option.group }}
+          </p>
+          <button
+            type="button"
+            class="native-select__option"
+            :class="{
+              'native-select__option--active': index === activeIndex,
+              'native-select__option--selected': isSelected(option),
+            }"
+            :disabled="option.disabled"
+            role="option"
+            :aria-selected="isSelected(option)"
+            @mouseenter="setActiveIndex(index)"
+            @click="selectOption(option)"
+          >
+            <span class="native-select__option-label">{{ option.label }}</span>
+            <Check v-if="isSelected(option)" class="native-select__check" :size="18" :stroke-width="3" />
+          </button>
+        </template>
+      </div>
     </Teleport>
   </div>
 </template>
@@ -92,6 +92,7 @@ const emit = defineEmits<{
 
 const rootEl = ref<HTMLElement | null>(null)
 const triggerEl = ref<HTMLButtonElement | null>(null)
+const menuEl = ref<HTMLElement | null>(null)
 const open = ref(false)
 const activeIndex = ref(0)
 const listboxId = `native-select-${Math.random().toString(36).slice(2)}`
@@ -240,7 +241,8 @@ function onButtonKeydown(event: KeyboardEvent) {
 }
 
 function onDocumentPointerDown(event: PointerEvent) {
-  if (!rootEl.value?.contains(event.target as Node)) {
+  const target = event.target as Node
+  if (!rootEl.value?.contains(target) && !menuEl.value?.contains(target)) {
     closeDropdown()
   }
 }