feat(subtitles): add local Japanese subtitle generation

- Generate Japanese SRTs through the overlay modal or launcher
- Support managed whisper.cpp models and optional dialogue detection

src/config/resolve/core-domains.ts

@@ -237,6 +237,7 @@ export function applyCoreDomainConfig(context: ResolveContext): void {
       'openRuntimeOptions',
       'openJimaku',
       'openTsukihime',
+      'openSubtitleGeneration',
       'openSessionHelp',
       'openControllerSelect',
       'openControllerDebug',