fix: 修复宠物升级经验显示与动态结算

logic/service/player/pet_test.go

@@ -122,3 +122,36 @@ func TestAddPetExpSmallRewardDoesNotJumpToMaxLevel(t *testing.T) {
 		t.Fatalf("expected exp pool to decrease by %d, got %d", addExp, player.Info.ExpPool)
 	}
 }
+
+func TestAddPetExpUsesDynamicPerLevelRequirement(t *testing.T) {
+	petID := firstPetIDForTest(t)
+	petInfo := playermodel.GenPetInfo(petID, 31, 0, 0, 20, nil, 0)
+	if petInfo == nil {
+		t.Fatalf("failed to generate test pet")
+	}
+
+	initialNeed := petInfo.NextLvExp
+	if initialNeed <= 0 {
+		t.Fatalf("expected positive exp requirement, got %d", initialNeed)
+	}
+
+	player := &Player{
+		baseplayer: baseplayer{
+			Info: &playermodel.PlayerInfo{
+				ExpPool: 1_000_000,
+			},
+		},
+	}
+
+	player.AddPetExp(petInfo, initialNeed)
+
+	if petInfo.Level != 21 {
+		t.Fatalf("expected pet level to become 21, got %d", petInfo.Level)
+	}
+	if petInfo.Exp != 0 {
+		t.Fatalf("expected level-up to reset current level exp, got %d", petInfo.Exp)
+	}
+	if petInfo.NextLvExp == initialNeed {
+		t.Fatalf("expected next level exp to change after leveling, still %d", petInfo.NextLvExp)
+	}
+}