feat(taro-platform-harmony-cpp): 支持虚拟样式 (#18253)

Author: 1oo1

packages/taro-vite-runner/src/harmony/style.ts

@@ -143,8 +143,10 @@ export async function stylePlugin(viteCompilerContext: ViteHarmonyCompilerContex
     load (id) {
       if (isStyleRequest(id)) {
         const rawId = stripVirtualModulePrefix(id).replace(STYLE_SUFFIX_RE, '')
-        this.addWatchFile(rawId)
-        return fs.readFileSync(rawId, 'utf-8')
+        if (fs.existsSync(rawId)) {
+          this.addWatchFile(rawId)
+          return fs.readFileSync(rawId, 'utf-8')
+        }
       }
     },
     async transform(raw, id) {