Add JSDoc documentation and file headers to all source files

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

src/main.ts

@@ -1,3 +1,15 @@
+// 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 main Application entry point. Creates the Vue app instance,
+ *   registers plugins (Pinia, Router, PrimeVue, SweetAlert2, Toast),
+ *   global components, and Cytoscape.js extensions.
+ */
+
 import { createApp, markRaw } from "vue";
 
 import App from "./App.vue";