diff --git a/src/components/launch/LaunchWindow.tsx b/src/components/launch/LaunchWindow.tsx
index 5b3b4af7..328db39d 100644
--- a/src/components/launch/LaunchWindow.tsx
+++ b/src/components/launch/LaunchWindow.tsx
@@ -60,6 +60,7 @@ const ICON_CONFIG = {
 
 type IconName = keyof typeof ICON_CONFIG;
 
+/** Renders the configured icon for a HUD control. */
 function getIcon(name: IconName, className?: string) {
 	const { icon: Icon, size } = ICON_CONFIG[name];
 	return <Icon size={size} className={className} />;
@@ -81,6 +82,7 @@ const hudSidebarClasses = "ml-0.5 pl-1.5 border-l border-white/10 flex items-cen
 const hudSidebarVerticalClasses =
 	"mt-0.5 pt-1.5 border-t border-white/10 flex flex-col items-center gap-0.5";
 
+/** Launches the floating recording HUD and its recorder controls. */
 export function LaunchWindow() {
 	const t = useScopedT("launch");
 	const availableLocales = getAvailableLocales();
@@ -371,6 +373,7 @@ export function LaunchWindow() {
 			window.electronAPI.hudOverlayClose();
 		}
 	};
+	/** Switches the HUD between horizontal and vertical tray layouts. */
 	const toggleTrayLayout = () => {
 		const nextLayout = trayLayout === "horizontal" ? "vertical" : "horizontal";
 		setTrayLayout(nextLayout);
diff --git a/src/i18n/locales/zh-TW/launch.json b/src/i18n/locales/zh-TW/launch.json
index 42ba52a7..d0b529eb 100644
--- a/src/i18n/locales/zh-TW/launch.json
+++ b/src/i18n/locales/zh-TW/launch.json
@@ -8,8 +8,8 @@
 		"resumeRecording": "繼續錄製",
 		"openVideoFile": "開啟影片檔案",
 		"openProject": "開啟專案",
-		"useVerticalTray": "使用直向工具列",
-		"useHorizontalTray": "使用橫向工具列"
+		"useVerticalTray": "使用直向托盤",
+		"useHorizontalTray": "使用橫向托盤"
 	},
 	"audio": {
 		"enableSystemAudio": "啟用系統音訊",
diff --git a/src/lib/userPreferences.ts b/src/lib/userPreferences.ts
index a14b6462..128eb73b 100644
--- a/src/lib/userPreferences.ts
+++ b/src/lib/userPreferences.ts
@@ -42,6 +42,7 @@ export const DEFAULT_PREFS: UserPreferences = {
 	trayLayout: "horizontal",
 };
 
+/** Parses stored preferences without throwing on malformed JSON. */
 function safeJsonParse(text: string | null): Record<string, unknown> | null {
 	if (!text) return null;
 	try {