refactor: migrate to vite-rolldown

Build time: 12.3s → 5.0s (including shell overhead)

Author: typed-sigterm

package.json

@@ -253,7 +253,7 @@
     "ps-tree": "^1.2.0",
     "tree-kill": "^1.2.2",
     "typescript": "^5.8.3",
-    "vite": "^6.3.5",
+    "vite": "npm:rolldown-vite@^6.3.15",
     "vue": "^3.5.16",
     "vue-tsc": "^2.2.10",
     "zod": "^3.25.46"