feat: test coverage of ComboControl and CheckboxFilter

src/shared/ui/ComboControl/ComboControl.svelte

@@ -36,6 +36,7 @@ const {
 }: ComboControlProps = $props();
 
 // Local state for the slider to prevent infinite loops
+// svelte-ignore state_referenced_locally - $state captures initial value, $effect syncs updates
 let sliderValue = $state(Number(control.value));
 
 // Sync sliderValue when external value changes