feat(config): add subtitle CSS editor, nPlusOne.enabled flag, and fix se

- subtitleStyle.css / subtitleStyle.secondary.css replace flat style fields in the settings window
- ankiConnect.nPlusOne.enabled gates known-word cache independently of knownWords.highlightEnabled
- Settings search now covers all categories, narrows on multi-word terms, and hides editor-owned fields
- Default note-type picker to Kiku then Lapis; rename isLapis.sentenceCardModel default to "Lapis"

src/main.ts

@@ -2576,7 +2576,7 @@ function shouldInitializeMecabForAnnotations(): boolean {
   const config = getResolvedConfig();
   const nPlusOneEnabled = getRuntimeBooleanOption(
     'subtitle.annotation.nPlusOne',
-    config.ankiConnect.knownWords.highlightEnabled,
+    config.ankiConnect.nPlusOne.enabled,
   );
   const jlptEnabled = getRuntimeBooleanOption(
     'subtitle.annotation.jlpt',
@@ -4187,7 +4187,7 @@ const {
       getNPlusOneEnabled: () =>
         getRuntimeBooleanOption(
           'subtitle.annotation.nPlusOne',
-          getResolvedConfig().ankiConnect.knownWords.highlightEnabled,
+          getResolvedConfig().ankiConnect.nPlusOne.enabled,
         ),
       getMinSentenceWordsForNPlusOne: () =>
         getResolvedConfig().ankiConnect.nPlusOne.minSentenceWords,