feat(common): 添加统一响应格式 Result/ResultCode/PageResult (T006)

src/main/java/com/label/common/result/PageResult.java

@@ -0,0 +1,22 @@
+package com.label.common.result;
+
+import lombok.Data;
+
+import java.util.List;
+
+@Data
+public class PageResult<T> {
+    private List<T> items;
+    private long total;
+    private int page;
+    private int pageSize;
+
+    public static <T> PageResult<T> of(List<T> items, long total, int page, int pageSize) {
+        PageResult<T> pageResult = new PageResult<>();
+        pageResult.setItems(items);
+        pageResult.setTotal(total);
+        pageResult.setPage(page);
+        pageResult.setPageSize(pageSize);
+        return pageResult;
+    }
+}

src/main/java/com/label/common/result/Result.java

@@ -0,0 +1,37 @@
+package com.label.common.result;
+
+import lombok.Data;
+
+@Data
+public class Result<T> {
+    private String code;
+    private T data;
+    private String message;
+
+    public static <T> Result<T> success(T data) {
+        Result<T> result = new Result<>();
+        result.setCode(ResultCode.SUCCESS.name());
+        result.setData(data);
+        return result;
+    }
+
+    public static <T> Result<T> success() {
+        Result<T> result = new Result<>();
+        result.setCode(ResultCode.SUCCESS.name());
+        return result;
+    }
+
+    public static <T> Result<T> failure(ResultCode code, String message) {
+        Result<T> result = new Result<>();
+        result.setCode(code.name());
+        result.setMessage(message);
+        return result;
+    }
+
+    public static <T> Result<T> failure(String code, String message) {
+        Result<T> result = new Result<>();
+        result.setCode(code);
+        result.setMessage(message);
+        return result;
+    }
+}

src/main/java/com/label/common/result/ResultCode.java

@@ -0,0 +1,19 @@
+package com.label.common.result;
+
+public enum ResultCode {
+    SUCCESS,
+    FAILURE,
+    UNAUTHORIZED,              // 401 - no valid token
+    FORBIDDEN,                 // 403 - insufficient role
+    NOT_FOUND,                 // 404
+    CONFLICT,                  // 409
+    INVALID_STATE,             // 409 state machine violation
+    TASK_CLAIMED,              // 409 task already claimed
+    SELF_REVIEW_FORBIDDEN,     // 403 self-review prevention
+    UNKNOWN_CONFIG_KEY,        // 400 unknown config key
+    INVALID_SAMPLES,           // 400 invalid export samples
+    EMPTY_SAMPLES,             // 400 empty sample list
+    FINETUNE_ALREADY_STARTED,  // 409 fine-tune already started
+    INVALID_STATE_TRANSITION,  // 409 invalid state machine transition
+    INTERNAL_ERROR             // 500
+}