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/src/components/ui/chart/index.ts

@@ -25,5 +25,3 @@ interface ChartContextProps {
 }
 
 export const [useChart, provideChartContext] = createContext<ChartContextProps>("Chart")
-
-export { VisCrosshair as ChartCrosshair, VisTooltip as ChartTooltip } from "@unovis/vue"

frontend/src/types/markdown-it.d.ts

@@ -1,47 +0,0 @@
-declare module 'markdown-it' {
-  interface Token {
-    type: string
-    tag: string
-    attrs: Array<[string, string]>
-    map: [number, number] | null
-    nesting: number
-    level: number
-    children: Token[] | null
-    content: string
-    markup: string
-    info: string
-    meta: any
-    block: boolean
-    hidden: boolean
-  }
-
-  interface Renderer {
-    rules: Record<string, (tokens: Token[], idx: number, options: any, env: any, self: Renderer) => string>
-  }
-
-  interface MarkdownIt {
-    renderer: Renderer
-    render: (src: string, env?: any) => string
-    parse: (src: string, env?: any) => Token[]
-  }
-
-  interface Options {
-    html?: boolean
-    xhtmlOut?: boolean
-    breaks?: boolean
-    langPrefix?: string
-    linkify?: boolean
-    typographer?: boolean
-    quotes?: string
-    highlight?: (str: string, lang: string) => string
-  }
-
-  interface MarkdownItConstructor {
-    new (options?: Options): MarkdownIt
-    (options?: Options): MarkdownIt
-  }
-
-  const MarkdownIt: MarkdownItConstructor
-  export default MarkdownIt
-  export { MarkdownIt, Options, Renderer, Token }
-}