Remove Vue-related files and empty directories

- Delete vue.config.js
- Delete src/App.vue
- Delete src/main.js (old Vue entry point)
- Remove empty directories: src/bin, src/context
- Complete cleanup after React migration

🤖 Generated with [Claude Code](https://claude.ai/code)

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

src/main.js

@@ -1,9 +0,0 @@
-import Vue from 'vue'
-import App from './App.vue'
-import VueMeta from 'vue-meta'
-Vue.use(VueMeta)
-Vue.config.productionTip = false
-
-new Vue({
-  render: h => h(App)
-}).$mount('#app')