Enhance EntryTraceDialog component by refactoring data display logic into dedicated summary functions for improved readability and maintainability. Update GridTab to streamline checkbox state management with a new toggle function. Refactor RulesCard to simplify window removal logic. Adjust CollectionsPanel, GenresPanel, GroupsPanel, RolesPanel, ShowsPanel, and UsersPanel to import sorting utilities from a centralized location, enhancing code organization. Update ThemeProvider to utilize a shared theme context for better consistency across the application.

frontend/src/features/admin/media/format.ts

@@ -0,0 +1,10 @@
+/** Длительность в «ч:мм:сс» (часы — только когда есть); null — прочерк. */
+export function formatDuration(seconds: number | null): string {
+  if (seconds == null) return '—'
+  const total = Math.round(seconds)
+  const h = Math.floor(total / 3600)
+  const m = Math.floor((total % 3600) / 60)
+  const s = total % 60
+  const pad = (n: number) => String(n).padStart(2, '0')
+  return h > 0 ? `${h}:${pad(m)}:${pad(s)}` : `${m}:${pad(s)}`
+}