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/stores/auth.ts

@@ -63,8 +63,13 @@ export const useAuthStore = defineStore('auth', {
     isTeamSession: (state) => Boolean(state.session?.teamLogin),
   },
   actions: {
+    clearSession() {
+      this.session = null
+      writeStoredToken(null)
+    },
     async hydrate() {
       if (!readStoredToken()) {
+        this.session = null
         this.hydrated = true
         return
       }
@@ -72,9 +77,8 @@ export const useAuthStore = defineStore('auth', {
       try {
         this.session = await api.getSession()
       } catch (error) {
-        this.session = null
         if (error instanceof ApiRequestError && (error.status === 401 || error.status === 403)) {
-          writeStoredToken(null)
+          this.clearSession()
         }
       } finally {
         this.hydrated = true
@@ -162,8 +166,7 @@ export const useAuthStore = defineStore('auth', {
       try {
         await api.logout()
       } finally {
-        this.session = null
-        writeStoredToken(null)
+        this.clearSession()
         this.loading = false
       }
     },
@@ -171,8 +174,7 @@ export const useAuthStore = defineStore('auth', {
       this.loading = true
       try {
         const result = await api.deleteMyData()
-        this.session = null
-        writeStoredToken(null)
+        this.clearSession()
         return result
       } finally {
         this.loading = false