- new "Web API settings" section after security settings in the Swing
options panel: checkbox bound to webUI plus a port text field bound
to webPort (empty -> default 4665; non-numeric or out of 0-65535
shows an invalid-port warning and aborts the save)
- load handler fills both controls from the current config item
- add i18n keys to klalb_zh_CN / klalb_en_US bundles
- include previously missing webUI/webPort fields in
KLALBControllerConfigItem equals/hashCode