Add vitest.config.mts to prevent deploy side-effect during tests

Co-authored-by: cyanzhong <6745066+cyanzhong@users.noreply.github.com>

Author: Copilot

package.json

@@ -3,8 +3,7 @@
   "version": "1.0.0",
   "description": "MarkEdit grammar checker based on Harper.",
   "scripts": {
-    "build": "vite build",
-    "precheck": "yarn lint && yarn test",
+    "build": "yarn lint && yarn test && vite build",
     "lint": "eslint .",
     "test": "vitest run",
     "reload": "osascript -e 'quit app \"MarkEdit\"' -e 'delay 1' -e 'launch app \"MarkEdit\"'",

vitest.config.mts

@@ -0,0 +1,8 @@
+import { defineConfig } from 'vitest/config';
+import mainPackage from './package.json' with { type: 'json' };
+
+export default defineConfig({
+  define: {
+    __PKG_VERSION__: JSON.stringify(mainPackage.version),
+  },
+});