feat: 赞赏后台

backend/src/main/java/com/openisle/dto/DonationDto.java

@@ -0,0 +1,16 @@
+package com.openisle.dto;
+
+import java.time.LocalDateTime;
+import lombok.Getter;
+import lombok.Setter;
+
+@Getter
+@Setter
+public class DonationDto {
+
+  private Long userId;
+  private String username;
+  private String avatar;
+  private int amount;
+  private LocalDateTime createdAt;
+}

backend/src/main/java/com/openisle/dto/DonationRequest.java

@@ -0,0 +1,11 @@
+package com.openisle.dto;
+
+import lombok.Getter;
+import lombok.Setter;
+
+@Getter
+@Setter
+public class DonationRequest {
+
+  private int amount;
+}

backend/src/main/java/com/openisle/dto/DonationResponse.java

@@ -0,0 +1,15 @@
+package com.openisle.dto;
+
+import java.util.ArrayList;
+import java.util.List;
+import lombok.Getter;
+import lombok.Setter;
+
+@Getter
+@Setter
+public class DonationResponse {
+
+  private int totalAmount;
+  private List<DonationDto> donations = new ArrayList<>();
+  private Integer balance;
+}