feat: add preferred STT languages and fix model settings layout

src/core/i18n.ts

@@ -63,8 +63,11 @@ export function learningLanguageInstruction(language: Language): string {
 		: "LANGUAGE: Use English for all learner-facing content, including teaching, questions and choices, plans, titles, practice, research summaries, knowledge-graph propositions, and text in generated diagrams, figures and demos. Preserve code, notation, identifiers, proper names and quoted source text. Follow an explicit learner request for a different language or a language-learning exercise when necessary.";
 }
 /** Streaming configuration: the language is pinned once at recording start, including reconnects. */
-export function dictationUrl(language: SttLanguage): string {
+export function dictationUrl(language: SttLanguage, preferredLanguages: readonly Language[] = []): string {
 	const params = new URLSearchParams({ model: "nova-3", language, encoding: "linear16", sample_rate: "16000", channels: "1", smart_format: "true", punctuate: "true", endpointing: "300" });
+	if (language === "multi") {
+		for (const preferred of new Set(preferredLanguages)) if (isLanguage(preferred)) params.append("language_hint", preferred);
+	}
 	return `wss://api.deepgram.com/v1/listen?${params}`;
 }
 

src/core/locales/en.json

@@ -251,6 +251,10 @@
 	"System default": "System default",
 	"Multilingual": "Multilingual",
 	"Multi": "Multi",
+	"Preferred languages": "Preferred languages",
+	"Used with Multilingual. Favors selected languages; other languages may still be recognized.": "Used with Multilingual. Favors selected languages; other languages may still be recognized.",
+	"Could not save preferred languages": "Could not save preferred languages",
+	"sttPreferredLanguages must be an array of \"en\" and \"ru\"": "sttPreferredLanguages must be an array of \"en\" and \"ru\"",
 	"Global": "Global",
 	"Chat": "Chat",
 	"Graph view": "Graph view",

src/core/locales/ru.json

@@ -251,6 +251,10 @@
 	"System default": "Язык системы",
 	"Multilingual": "Несколько языков",
 	"Multi": "Мульти",
+	"Preferred languages": "Предпочитаемые языки",
+	"Used with Multilingual. Favors selected languages; other languages may still be recognized.": "Используется в режиме «Несколько языков». Выбранные языки получают приоритет, но могут распознаваться и другие.",
+	"Could not save preferred languages": "Не удалось сохранить предпочитаемые языки",
+	"sttPreferredLanguages must be an array of \"en\" and \"ru\"": "Предпочитаемые языки должны быть списком кодов «en» и «ru»",
 	"Global": "Общие",
 	"Chat": "Занятие",
 	"Graph view": "Граф",

src/core/settings-resolution.ts

@@ -184,6 +184,7 @@ export function resolveSettings(record: UserSettings | null): EffectiveSettings
 			autoUpdate: record?.general?.autoUpdate ?? FACTORY_SETTINGS.general.autoUpdate,
 			...(record?.general?.language ? { language: record.general.language } : {}),
 			...(record?.general?.sttLanguage ? { sttLanguage: record.general.sttLanguage } : {}),
+			...(record?.general?.sttPreferredLanguages ? { sttPreferredLanguages: [...record.general.sttPreferredLanguages] } : {}),
 		},
 		agent: {
 			models,

src/core/settings.ts

@@ -240,6 +240,8 @@ export interface GeneralSettings {
 	language?: Language;
 	/** Independent dictation language; multi = multilingual, absent = browser/system language. */
 	sttLanguage?: SttLanguage;
+	/** Optional recognition hints for multilingual dictation; absent/empty = automatic detection. */
+	sttPreferredLanguages?: Language[];
 }
 
 /** Agent settings — everything about the non-conversation machinery. */
@@ -450,6 +452,7 @@ function sanitizeGeneral(raw: Record<string, unknown>): GeneralSettings {
 	if (autoUpdate !== undefined) out.autoUpdate = autoUpdate;
 	if (isLanguage(raw.language)) out.language = raw.language;
 	if (isSttLanguage(raw.sttLanguage)) out.sttLanguage = raw.sttLanguage;
+	if (Array.isArray(raw.sttPreferredLanguages)) out.sttPreferredLanguages = [...new Set(raw.sttPreferredLanguages.filter(isLanguage))];
 	return out;
 }
 

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 };
 }