[EDIT]ヘッダーの読み込みコードを追加しました

src/main/resources/templates/analysis.html

@@ -1,12 +1,15 @@
 <!DOCTYPE html>
 <html xmlns:th="http://www.thymeleaf.org">
 <head>
-<meta content="text/html; charset=UTF-8" http-equiv="Content-Type">
+<meta name="viewport" content="width=device-width, initial-scale=1" http-equiv="Content-Type">
 <title>分析画面</title>
 <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.7/dist/css/bootstrap.min.css" rel="stylesheet">
 </head>
 <body>
 	
+	<div th:replace="~{header :: header}">
+	</div>
+	
 	<h2 class="text-center">支出分析</h2>
 	
 	<table class="table text-center">