word_search: remove duplicate results

lib/search/word_search/entry_id_query.dart

@@ -82,12 +82,13 @@ String _filterFTSSensitiveCharacters(String word) {
             ${!countOnly ? 'LIMIT ?' : ''}
           )
 
-        ${countOnly ? 'SELECT COUNT("entryId") AS count' : 'SELECT "entryId", "score"'}
+        ${countOnly ? 'SELECT COUNT("entryId") AS count' : 'SELECT "entryId", MAX("score") AS "score"'}
         FROM (
           SELECT * FROM fts_results
-          UNION ALL
+          UNION
           SELECT * FROM non_fts_results
         )
+        GROUP BY "entryId"
       '''
           .trim(),
       [