Add JSDoc documentation and file headers to all source files

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

src/router/index.ts

@@ -1,3 +1,14 @@
+// The Lucia project.
+// Copyright 2023-2026 DSP, inc.  All rights reserved.
+// Authors:
+//   chiayin.kuo@dsp.im (chiayin), 2023/1/31
+//   imacat.yang@dsp.im (imacat), 2023/9/23
+//   cindy.chang@dsp.im (Cindy Chang), 2024/5/30
+/**
+ * @module router Vue Router configuration with route definitions,
+ *   navigation guards, and authentication redirect logic.
+ */
+
 import { createRouter, createWebHistory, } from "vue-router";
 import AuthContainer from '@/views/AuthContainer.vue';
 import MainContainer from '@/views/MainContainer.vue';