Add JSDoc documentation and file headers to all source files

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/components/Header.vue

@@ -20,6 +20,17 @@
 </template>
 
 <script setup>
+// The Lucia project.
+// Copyright 2023-2026 DSP, inc.  All rights reserved.
+// Authors:
+//   chiayin.kuo@dsp.im (chiayin), 2023/1/31
+//   cindy.chang@dsp.im (Cindy Chang), 2024/5/30
+//   imacat.yang@dsp.im (imacat), 2023/9/23
+/**
+ * @module components/Header Application header with DSP logo and
+ *   user account menu toggle button.
+ */
+
 import { ref, onMounted, } from 'vue';
 import { useRoute } from 'vue-router';
 import { storeToRefs, } from 'pinia';
@@ -49,7 +60,8 @@ const toggleIsAcctMenuOpen = () => {
 };
 
 /**
- * 登出的行為
+ * Handles logout with unsaved-changes confirmation for Map
+ * and Conformance pages.
  */
 function logOutButton() {
   if ((route.name === 'Map' || route.name === 'CheckMap') && tempFilterId.value) {