- Document Linux GameSentenceMiner overlay default: `~/.config/gsm_overlay`
- Add inline example for `yomitan.externalProfilePath` in integration option docs
- add `yomitan.externalProfilePath` config and default/template wiring
- load Yomitan from an external Electron profile/session when configured
- disable SubMiner Yomitan writes/settings UI in external-profile mode and update docs/tests