修复住宿：床位重叠冲突返回标准化业务错误码

RuoYi-Vue/ruoyi-admin/src/test/java/com/ruoyi/web/controller/train/AccommodationAndAuthApiControllerContractTest.java

@@ -2,6 +2,7 @@ package com.ruoyi.web.controller.train;
 
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
 
 import java.lang.reflect.Method;
@@ -181,5 +182,30 @@ public class AccommodationAndAuthApiControllerContractTest
                 (java.util.Map<String, Object>) controller.getCapabilities().get("data");
         assertEquals(Boolean.FALSE, missing.get("manualRevokeAvailable"));
     }
+
+    /**
+     * EX-13: 床位时间窗口冲突必须返回标准业务错误码 (AccommodationErrorCode.BED_ALREADY_OCCUPIED = 40060)，
+     * 严禁退化为未处理的系统 500 异常。
+     */
+    @Test
+    public void testEx13_BedOverlapErrorResponseContract()
+    {
+        com.ruoyi.framework.web.exception.GlobalExceptionHandler handler =
+                new com.ruoyi.framework.web.exception.GlobalExceptionHandler();
+
+        com.ruoyi.common.exception.ServiceException ex = new com.ruoyi.common.exception.ServiceException(
+                "BED_ALREADY_OCCUPIED: 该床位在目标培训周期内已被占用 (宿舍: DORM_101，床位: 1号床)",
+                com.ruoyi.train.constant.AccommodationErrorCode.BED_ALREADY_OCCUPIED);
+
+        com.ruoyi.common.core.domain.AjaxResult result = handler.handleServiceException(ex, null);
+        assertNotNull(result);
+        assertEquals("HTTP 响应体 code 必须是标准业务错误码 40060",
+                Integer.valueOf(com.ruoyi.train.constant.AccommodationErrorCode.BED_ALREADY_OCCUPIED),
+                result.get(com.ruoyi.common.core.domain.AjaxResult.CODE_TAG));
+        assertTrue("响应体 code 严禁为系统 500 异常",
+                !Integer.valueOf(500).equals(result.get(com.ruoyi.common.core.domain.AjaxResult.CODE_TAG)));
+        assertTrue("响应体消息必须包含 BED_ALREADY_OCCUPIED 提示",
+                String.valueOf(result.get(com.ruoyi.common.core.domain.AjaxResult.MSG_TAG)).contains("BED_ALREADY_OCCUPIED"));
+    }
 }