feat: add preferred STT languages and fix model settings layout

src/server/settings-body.ts

@@ -94,6 +94,10 @@ export function parseGeneralSettingsBody(body: unknown): SettingsBodyResult<Gene
 		if (!isSttLanguage(raw.sttLanguage)) return { ok: false, error: 'sttLanguage must be "en", "ru", or "multi"' };
 		settings.sttLanguage = raw.sttLanguage;
 	}
+	if (raw.sttPreferredLanguages !== undefined) {
+		if (!Array.isArray(raw.sttPreferredLanguages) || !raw.sttPreferredLanguages.every(isLanguage)) return { ok: false, error: 'sttPreferredLanguages must be an array of "en" and "ru"' };
+		settings.sttPreferredLanguages = [...new Set(raw.sttPreferredLanguages)];
+	}
 	return { ok: true, settings };
 }