feat(common): 添加 BusinessException/GlobalExceptionHandler/CompanyContext/状态枚举 (T007/T008/T012-T015)

src/main/java/com/label/common/exception/BusinessException.java

@@ -0,0 +1,22 @@
+package com.label.common.exception;
+
+import lombok.Getter;
+import org.springframework.http.HttpStatus;
+
+@Getter
+public class BusinessException extends RuntimeException {
+    private final String code;
+    private final HttpStatus httpStatus;
+
+    public BusinessException(String code, String message) {
+        super(message);
+        this.code = code;
+        this.httpStatus = HttpStatus.BAD_REQUEST;
+    }
+
+    public BusinessException(String code, String message, HttpStatus httpStatus) {
+        super(message);
+        this.code = code;
+        this.httpStatus = httpStatus;
+    }
+}

src/main/java/com/label/common/exception/GlobalExceptionHandler.java

@@ -0,0 +1,28 @@
+package com.label.common.exception;
+
+import com.label.common.result.Result;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+import org.springframework.web.bind.annotation.RestControllerAdvice;
+
+@Slf4j
+@RestControllerAdvice
+public class GlobalExceptionHandler {
+
+    @ExceptionHandler(BusinessException.class)
+    public ResponseEntity<Result<?>> handleBusinessException(BusinessException e) {
+        log.warn("业务异常: code={}, message={}", e.getCode(), e.getMessage());
+        return ResponseEntity
+            .status(e.getHttpStatus())
+            .body(Result.failure(e.getCode(), e.getMessage()));
+    }
+
+    @ExceptionHandler(Exception.class)
+    public ResponseEntity<Result<?>> handleException(Exception e) {
+        log.error("系统异常", e);
+        return ResponseEntity
+            .internalServerError()
+            .body(Result.failure("INTERNAL_ERROR", "系统内部错误"));
+    }
+}