feat(dictation): add persistent language selection in General settings

components/settings/settings-dialog.tsx

@@ -40,7 +40,8 @@ import {
 	type UserSettings,
 } from "@/src/core";
 import { useAppearance } from "./appearance.tsx";
-import { SettingsSection, SettingsRow, Toggle } from "./controls.tsx";
+import { SettingsGroup, SettingsSection, SettingsRow, Toggle } from "./controls.tsx";
+import { DictationLanguageSetting } from "@/components/dictation-language";
 import { AgentSection } from "./agent-section.tsx";
 import type { ModelsSettings } from "@/src/core";
 import { MENU_CLOSE_EVENT, MENU_OPEN_EVENT } from "@/components/menu-shell";
@@ -375,6 +376,9 @@ export function SettingsDialogBody({
 											}
 										/>
 									</SettingsRow>
+									<SettingsGroup label="Dictation" testid="group-dictation-settings">
+										<DictationLanguageSetting />
+									</SettingsGroup>
 								</SettingsSection>
 							)}
 							{active === "keys" && (