fix(catalog-search): clear stale query filter

src/components/catalog-search/__tests__/catalog-search.test.tsx

@@ -121,6 +121,25 @@ describe('CatalogSearch', () => {
     expect(queryInput()?.getAttribute('value')).toBe('linux');
   });
 
+  it('clears the catalog search filter when navigation removes the query param', async () => {
+    testState.location = {
+      pathname: '/mu/catalog',
+      search: '?q=linux',
+    };
+
+    await renderSearch();
+
+    testState.location = {
+      pathname: '/mu/catalog',
+      search: '',
+    };
+
+    await renderSearch();
+
+    expect(testState.clearSearchFilterMock).toHaveBeenCalled();
+    expect(queryInput()).toBeNull();
+  });
+
   it('toggles the search UI, updates the filter and URL, and closes via Escape', async () => {
     await renderSearch();
 

src/components/catalog-search/catalog-search.tsx

@@ -19,8 +19,11 @@ const CatalogSearch = () => {
   useEffect(() => {
     if (queryParam) {
       setSearchFilter(queryParam);
+      return;
     }
-  }, [queryParam, setSearchFilter]);
+
+    clearSearchFilter();
+  }, [queryParam, setSearchFilter, clearSearchFilter]);
 
   const updateURL = useCallback(
     (searchText: string) => {