修复：补充 Docker COS 凭证配置，修复截图代理 404 问题

- docker-compose.yml 添加 COS_SECRET_ID/KEY/REGION/BUCKET 环境变量透传
- docker/.env 填入腾讯云 COS 凭证和截图回调地址
- AiRoiController 移除多余 @GetMapping 注解，消除 Spring 双注解警告

根因：容器未传入 COS 凭证 → CosUtil 初始化跳过 → proxyScreenshotImage 返回 null → 404

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

docker/.env

@@ -16,4 +16,13 @@ SIP_Password=wvp_sip_password
 
 
 RecordSip=true
-RecordPushLive=
+RecordPushLive=
+
+# COS 截图代理（腾讯云 COS）
+COS_REGION=ap-shanghai
+COS_BUCKET=xhwkzx-1-1389966313
+COS_SECRET_ID=AKIDVxPiqmVhYv7FCwVqytdAVddQ2TJySt9I
+COS_SECRET_KEY=1rVyEI8mMVWs21xfBUjy4BE6DA4z7KWb
+
+# AI 截图回调地址
+AI_SCREENSHOT_CALLBACK_URL=http://124.221.55.225:18080

docker/docker-compose.yml

@@ -133,6 +133,15 @@ services:
       RecordSip: ${RecordSip}
       RecordPushLive: ${RecordPushLive}
 
+      # COS 截图代理
+      COS_SECRET_ID: ${COS_SECRET_ID:}
+      COS_SECRET_KEY: ${COS_SECRET_KEY:}
+      COS_REGION: ${COS_REGION:ap-beijing}
+      COS_BUCKET: ${COS_BUCKET:}
+
+      # AI 截图回调地址
+      AI_SCREENSHOT_CALLBACK_URL: ${AI_SCREENSHOT_CALLBACK_URL:}
+
   polaris-nginx:
     # 显式指定构建上下文和Dockerfile路径
     build:

src/main/java/com/genersoft/iot/vmp/aiot/controller/AiRoiController.java

@@ -117,7 +117,6 @@ public class AiRoiController {
     }
 
     @Operation(summary = "截图图片代理（服务端从 COS 下载后返回）")
-    @GetMapping("/snap/image")
     @RequestMapping(value = "/snap/image", method = {RequestMethod.GET, RequestMethod.HEAD})
     public ResponseEntity<?> getSnapImage(@RequestParam String cameraCode, HttpServletRequest request) {
         // HEAD 请求：只检查是否存在，不返回图片数据