feat: show deploy version on select-all

Inject git commit hash and build timestamp at build time via Vite's
define option. Display them in a hidden element at the bottom of the
download page — text matches the background color and only becomes
visible when the user selects all text (Ctrl+A / Cmd+A).

Author: fengmk2

package.json

@@ -7,6 +7,7 @@
     "prepare": "vp config"
   },
   "devDependencies": {
+    "@types/node": "^25.5.2",
     "vite": "catalog:",
     "vite-plus": "catalog:",
     "void": "npm:@void-sdk/void@0.2.6"