Controller: hold to show the secondary subtitle, dictionary entry navigation, standard button names (#312)

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>

src/config/definitions/defaults-core.ts

@@ -79,6 +79,9 @@ export const CORE_DEFAULT_CONFIG: Pick<
       nextAudio: { kind: 'button', buttonIndex: 5 },
       playCurrentAudio: { kind: 'button', buttonIndex: 4 },
       toggleMpvPause: { kind: 'button', buttonIndex: 9 },
+      holdSecondarySub: { kind: 'none' },
+      previousEntry: { kind: 'none' },
+      nextEntry: { kind: 'none' },
       leftStickHorizontal: { kind: 'axis', axisIndex: 0, dpadFallback: 'horizontal' },
       leftStickVertical: { kind: 'axis', axisIndex: 1, dpadFallback: 'vertical' },
       rightStickHorizontal: { kind: 'axis', axisIndex: 3, dpadFallback: 'none' },