[Sepush]

Moves the docs site's remaining JavaScript to TypeScript, type-checks the site, and writes its components with <script setup lang="ts">. No behavior change.

Changes

• JS → TS (demo/): entries (index.dev, index.prod, setup), routes (routes, router), store (index, menu-options, hljs) and utils (color-mode, codesandbox, playground, route, github-url) are now .ts with types; the last four .vue pages without lang="ts" (changelog, vue3) get it. build/vite-plugin-index-tranform.ts points at the renamed entries, and demo/env.d.ts declares the .md page modules.
• Dead code removed:
  • build/loaders/test/testMdLoader.js and testDemoLoader.js load NaiveUIMdLoader, which no longer exists, and nothing runs them.
  • demo/utils/composables.js shadowed composables.ts: Vite resolves .js before .ts, so the TypeScript version was never used.
• Type checking the site: tsconfig.site.json covers demo/ and build/, run by lint:site-type as part of pnpm lint. Until now CI only type-checked src/, so the site's lang="ts" files went unchecked. The 31 errors this surfaced are fixed (mostly implicit any and nullable template refs in SiteHeader.vue, Layout.vue, ComponentDemo.vue).
• <script setup>: the site's own components (SiteHeader, SiteRoot, Site, Layout, home page and footer, ComponentDemo, the copy / edit / CodeSandbox / Playground buttons, EditOnGithubHeader, CopyMarkdownButton, the changelog and vue3 pages) move from defineComponent and the Options API (home page) to <script setup lang="ts"> with typed props. Names used by templates are kept, so templates don't change. Left as they are: the example demos under demo/pages/docs/theme/ (user-facing example code) and build/loaders/ComponentDemoTemplate.vue (the loader's template).

Tests

• vue-tsc -p tsconfig.site.json: 0 errors. eslint demo build: clean. vitest run build: passes.
• Production build of the site, and a browser check of the dev server and the build:
  • Home: theme button, Get Started, llms.txt hint, footer links.
  • Header: language switch on home / docs / component pages, theme picker, search, logo, mobile menu.
  • Button page: 18 demos, show code, TS/JS tabs, copy code, Edit on GitHub, CodeSandbox and Playground buttons, copy Markdown.
  • Other pages: changelog in both languages, theme docs page, menu counts and navigation, legacy /<lang>/<theme>/... redirects.
  • No page or console errors.

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 63.56%. Comparing base (3940323) to head (cb1e54b).
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Additional details and impacted files

@@           Coverage Diff           @@
##             docs    #8248   +/-   ##
=======================================
  Coverage   63.56%   63.56%           
=======================================
  Files         878      878           
  Lines       27487    27487           
  Branches     8750     8750           
=======================================
  Hits        17471    17471           
  Misses       9803     9803           
  Partials      213      213           

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