perf: 优化构建体积和依赖

- 移除未使用的依赖包 (@unovis/ts, @unovis/vue, markdown-it)
- 优化 vite manualChunks 配置，将 echarts/chart.js 分离为独立 chunk
- 主入口文件从 1.1MB 减少到 211KB (-81%)
- 依赖包数量从 837 减少到 662

frontend/package.json

@@ -37,8 +37,6 @@
     "@tailwindcss/vite": "^4.2.1",
     "@tanstack/vue-query": "^5.92.9",
     "@tanstack/vue-table": "^8.21.3",
-    "@unovis/ts": "^1.6.4",
-    "@unovis/vue": "^1.6.4",
     "@vee-validate/zod": "^4.15.1",
     "@vueuse/core": "^14.2.1",
     "@vueuse/integrations": "^14.2.1",
@@ -51,7 +49,6 @@
     "embla-carousel-autoplay": "^8.6.0",
     "embla-carousel-vue": "^8.6.0",
     "lucide-vue-next": "0.575.0",
-    "markdown-it": "^14.1.1",
     "motion-v": "1.7.4",
     "nprogress": "^0.2.0",
     "pinia": "^3.0.4",