feat(config): reorganize settings window and move annotation colors to subtitleStyle

- Reorganize Configuration window into Appearance, Behavior, Anki, Input, and Integration sections
- Add AnkiConnect-backed deck, note-type, and field pickers in the Anki section
- Add click-to-learn keybinding controls
- Move known-word and N+1 highlight colors to subtitleStyle.knownWordColor / subtitleStyle.nPlusOneColor; legacy ankiConnect.knownWords.color and ankiConnect.nPlusOne.nPlusOne keys still accepted with deprecation warnings
- Add deckNames, modelNames, modelFieldNames, and fieldNamesForDeck methods to AnkiConnectClient
- Mark discordPresence.presenceStyle as an enum in the config registry

src/preload-settings.test.ts

@@ -8,3 +8,16 @@ test('settings preload stays sandbox-compatible by avoiding local runtime import
 
   assert.doesNotMatch(source, /from\s+['"]\.\/shared\/ipc\/contracts(?:\.(?:js|ts))?['"]/);
 });
+
+test('settings preload exposes Anki lookup helpers', () => {
+  const source = fs.readFileSync(path.join(process.cwd(), 'src', 'preload-settings.ts'), 'utf8');
+
+  for (const method of [
+    'getAnkiDeckNames',
+    'getAnkiDeckFieldNames',
+    'getAnkiModelNames',
+    'getAnkiModelFieldNames',
+  ]) {
+    assert.match(source, new RegExp(`${method}:`));
+  }
+});