fix: 修复摄像头无法正常启动，以及关闭摄像头会导致后端崩溃的问题

src/views/Project/VideoStream.vue

@@ -387,8 +387,6 @@ import { VideoStreamClient, ResolutionConfigRequest } from "@/APIClient";
 import { useEquipments } from "@/stores/equipments";
 import { AuthManager } from "@/utils/AuthManager";
 
-const eqps = useEquipments();
-
 // 状态管理
 const loading = ref(false);
 const configing = ref(false);
@@ -510,7 +508,7 @@ const toggleStreamType = async () => {
       "success",
       `已切换到${streamType.value === "usbCamera" ? "USB摄像头" : "视频流"}`,
     );
-    stopStream();
+    await stopStream();
   } catch (error) {
     addLog("error", `切换视频流类型失败: ${error}`);
     console.error("切换视频流类型失败:", error);
@@ -647,7 +645,8 @@ const tryReconnect = () => {
 
 // 执行对焦
 const performFocus = async () => {
-  if (isFocusing.value || !isPlaying.value) return;
+  if (isFocusing.value || !isPlaying.value || streamType.value === "usbCamera")
+    return;
 
   try {
     isFocusing.value = true;
@@ -711,7 +710,7 @@ const startStream = async () => {
   try {
     addLog("info", "正在启动视频流...");
     videoStatus.value = "正在连接视频流...";
-    videoClient.setVideoStreamEnable(true);
+    await videoClient.setVideoStreamEnable(true);
 
     // 刷新状态
     await refreshStatus();
@@ -778,7 +777,7 @@ const changeResolution = async () => {
 
     // 如果正在播放，先停止视频流
     if (wasPlaying) {
-      stopStream();
+      await stopStream();
       await new Promise((resolve) => setTimeout(resolve, 1000)); // 等待1秒
     }
 
@@ -815,10 +814,10 @@ const changeResolution = async () => {
 };
 
 // 停止视频流
-const stopStream = () => {
+const stopStream = async () => {
   try {
     addLog("info", "正在停止视频流...");
-    videoClient.setVideoStreamEnable(false);
+    await videoClient.setVideoStreamEnable(false);
 
     // 清除视频源
     currentVideoSource.value = "";