word_search: filter input for FTS chars

lib/search/word_search/entry_id_query.dart

@@ -27,6 +27,18 @@ SearchMode _determineSearchMode(String word) {
   }
 }
 
+/// FTS reacts to certain characters, so we should filter them out.
+String _filterFTSSensitiveCharacters(String word) {
+  return word
+      .replaceAll('-', '')
+      .replaceAll('*', '')
+      .replaceAll('+', '')
+      .replaceAll('(', '')
+      .replaceAll(')', '')
+      .replaceAll('^', '')
+      .replaceAll('\"', '');
+}
+
 (String, List<Object?>) _kanjiReadingTemplate(
   String tableName,
   String word, {
@@ -78,8 +90,8 @@ SearchMode _determineSearchMode(String word) {
       '''
           .trim(),
       [
-        word,
-        word,
+        _filterFTSSensitiveCharacters(word),
+        _filterFTSSensitiveCharacters(word),
         if (!countOnly) pageSize,
         word,
         if (!countOnly) pageSize,