Fix #11402: Make string filter locale-aware.

src/os/macosx/string_osx.h

@@ -84,6 +84,7 @@ public:
 void MacOSResetScriptCache(FontSize size);
 void MacOSSetCurrentLocaleName(const char *iso_code);
 int MacOSStringCompare(std::string_view s1, std::string_view s2);
+int MacOSStringContains(const std::string_view str, const std::string_view value, bool case_insensitive);
 
 void MacOSRegisterExternalFont(const char *file_path);