修复bug

client/src/lib/luxsinApi.ts

@@ -171,6 +171,9 @@ export interface PeqApplyPayload {
 export const INPUT_LABELS = ["USB", "USB-C", "Coaxial", "Optical", "Bluetooth", "IIS", "RCA"];
 export const OUTPUT_LABELS = ["XLR", "RCA", "Headset", "XLR/RCA"];
 
+/** Device `input` index for Bluetooth source. */
+export const INPUT_BLUETOOTH_INDEX = 4;
+
 /** Device `output` index for headphone / headset. */
 export const OUTPUT_HEADSET_INDEX = 2;
 export const LANGUAGE_LABELS = ["English", "繁體中文", "简体中文"];
@@ -345,6 +348,19 @@ export function parseFirmwareVersion(version: unknown): number {
   return Number(parts[parts.length - 1]);
 }
 
+/** Display firmware version as X.Y.0.Z (e.g. 2005 → 2.0.0.5). */
+export function formatFirmwareVersionDisplay(version: unknown): string {
+  if (version === null || version === undefined || String(version).trim() === "") {
+    return "—";
+  }
+  const n = parseFirmwareVersion(version);
+  const major = Math.floor(n / 1000);
+  const minor = Math.floor((n % 1000) / 100);
+  const patch = 0;
+  const build = n % 10;
+  return `${major}.${minor}.${patch}.${build}`;
+}
+
 /** Pre-out volume passthrough mode selected (0dB or -12dB). */
 export function isVolumePassthroughActive(dacVolumeDirect: number | undefined): boolean {
   return dacVolumeDirect === 1 || dacVolumeDirect === 2;