refactor: migrate to Vant and set up auto-imports

- replace uni-ui drawer and icon components with Vant equivalents
- add unplugin-auto-import and unplugin-vue-components to Vite config
- update project dependencies to compatible versions
- generate auto-import and component type declaration files
- clean up deprecated imports and commented code in home page components
- fix App.vue to use lowercase router-view and script setup

auto-imports.d.ts

@@ -0,0 +1,10 @@
+/* eslint-disable */
+/* prettier-ignore */
+// @ts-nocheck
+// noinspection JSUnusedGlobalSymbols
+// Generated by unplugin-auto-import
+// biome-ignore lint: disable
+export {}
+declare global {
+
+}