[FIX] 所持金がnullに表示されるバグを修正しました。

src/main/resources/templates/goal_create.html

@@ -37,7 +37,9 @@
 					<div>
 						<label>目標金額</label>
 						<input type="number" th:field="*{targetAmount}" required min="1">
-						<span th:text="|所持金：${currentAmount}円|"></span>
+						<br>
+						<span th:text="|所持金：${session.currentAmount}円|"></span>
+						<input type="hidden" name="currentAmount" th:value="${currentAmount}">
 						<span th:if="${message != null}">
 							<span th:text="${message}" style="color: red;"></span>
 						</span>