fix: 修复LinkTaskMapper中target_score列不存在的SQL错误

- 移除LinkTaskMapper.xml中所有对不存在的target_score列的引用
- 修复因SQL查询不存在列导致的BadSqlGrammarException
- 添加TargetScoreResponse DTO用于目标点数响应
- 更新LinkController添加获取目标点数接口
- 优化UserLinkStatusResponse添加machineId字段
- 更新数据库schema文档

🤖 Generated with [Claude Code](https://claude.ai/code)

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

src/main/java/com/gameplatform/server/model/dto/link/TargetScoreResponse.java

@@ -0,0 +1,105 @@
+package com.gameplatform.server.model.dto.link;
+
+/**
+ * 目标点数响应DTO
+ */
+public class TargetScoreResponse {
+    
+    /**
+     * 是否成功获取目标点数
+     */
+    private boolean success;
+    
+    /**
+     * 完成点数值（当success为true时有效）
+     */
+    private Integer completedPoints;
+    
+    /**
+     * 错误消息（当success为false时）
+     */
+    private String errorMessage;
+    
+    /**
+     * 设备ID
+     */
+    private String machineId;
+    
+    /**
+     * 链接编号
+     */
+    private String codeNo;
+    
+    public TargetScoreResponse() {
+    }
+    
+    public TargetScoreResponse(boolean success, Integer completedPoints, String errorMessage) {
+        this.success = success;
+        this.completedPoints = completedPoints;
+        this.errorMessage = errorMessage;
+    }
+    
+    /**
+     * 成功响应
+     */
+    public static TargetScoreResponse success(String codeNo, String machineId, Integer completedPoints) {
+        TargetScoreResponse response = new TargetScoreResponse();
+        response.setSuccess(true);
+        response.setCodeNo(codeNo);
+        response.setMachineId(machineId);
+        response.setCompletedPoints(completedPoints);
+        return response;
+    }
+    
+    /**
+     * 失败响应
+     */
+    public static TargetScoreResponse error(String codeNo, String machineId, String errorMessage) {
+        TargetScoreResponse response = new TargetScoreResponse();
+        response.setSuccess(false);
+        response.setCodeNo(codeNo);
+        response.setMachineId(machineId);
+        response.setErrorMessage(errorMessage);
+        return response;
+    }
+    
+    public boolean isSuccess() {
+        return success;
+    }
+    
+    public void setSuccess(boolean success) {
+        this.success = success;
+    }
+    
+    public Integer getCompletedPoints() {
+        return completedPoints;
+    }
+    
+    public void setCompletedPoints(Integer completedPoints) {
+        this.completedPoints = completedPoints;
+    }
+    
+    public String getErrorMessage() {
+        return errorMessage;
+    }
+    
+    public void setErrorMessage(String errorMessage) {
+        this.errorMessage = errorMessage;
+    }
+    
+    public String getMachineId() {
+        return machineId;
+    }
+    
+    public void setMachineId(String machineId) {
+        this.machineId = machineId;
+    }
+    
+    public String getCodeNo() {
+        return codeNo;
+    }
+    
+    public void setCodeNo(String codeNo) {
+        this.codeNo = codeNo;
+    }
+}

src/main/java/com/gameplatform/server/model/dto/link/UserLinkStatusResponse.java

@@ -8,7 +8,13 @@ public class UserLinkStatusResponse {
     @Schema(description = "链接状态", example = "NEW", allowableValues = {"NEW", "USING", "LOGGED_IN", "COMPLETED", "REFUNDED", "EXPIRED"})
     private String status;
     
+    @Schema(description = "机器ID")
+    private String machineId;
+    
     // Getter and Setter
     public String getStatus() { return status; }
     public void setStatus(String status) { this.status = status; }
+
+    public String getMachineId() { return machineId; }
+    public void setMachineId(String machineId) { this.machineId = machineId; }
 }

src/main/java/com/gameplatform/server/model/entity/agent/LinkTask.java

@@ -67,6 +67,8 @@ public class LinkTask {
     
     @TableField("completion_images")
     private String completionImages; // JSON格式存储4张图片URL
+    
+
 
     public Long getId() { return id; }
     public void setId(Long id) { this.id = id; }
@@ -130,4 +132,6 @@ public class LinkTask {
     
     public String getCompletionImages() { return completionImages; }
     public void setCompletionImages(String completionImages) { this.completionImages = completionImages; }
+    
+
 }