Use void operator for getter side-effect access in tests (S1481)

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

tests/stores/allMapData.test.js

@@ -237,7 +237,7 @@ describe("allMapDataStore", () => {
         { type: "date", min: originalDate, max: "2023-12-31T23:59:00Z" },
       ];
       // Access the getter once
-      const _accessed = store.filterAttrs;
+      void store.filterAttrs;
       // The original state should still contain the ISO date, not a formatted string
       expect(store.allFilterAttrs[0].min).toBe(originalDate);
     });