chore(prettier): use ESM config and drop redundant --config flags

Project is "type": "module" so plain prettier.config.js with
`export default` is the modern shape. Prettier auto-discovers
prettier.config.{js,cjs,mjs} in the cwd, so the explicit
--config ./prettier.config.cjs in lint-staged and the CI check
was redundant — removed both.

Author: PaulHax

.github/workflows/checks.yml

@@ -15,7 +15,7 @@ jobs:
           node-version: 22
       - run: npm ci
       - name: Enforce code style
-        run: npx prettier --config ./prettier.config.cjs --list-different "src/**/*.[jt]s" "tests/**/*.[jt]s" "src/**/*.vue"
+        run: npx prettier --list-different "src/**/*.[jt]s" "tests/**/*.[jt]s" "src/**/*.vue"
       - name: Lint
         run: npm run lint
       - name: Tests

package.json

@@ -115,7 +115,7 @@
   "lint-staged": {
     "*.{js,jsx,ts,tsx,vue}": [
       "eslint",
-      "prettier --config ./prettier.config.cjs --write"
+      "prettier --write"
     ]
   }
 }

prettier.config.cjs prettier.config.jsprettier.config.cjs renamed to prettier.config.js

@@ -1,4 +1,4 @@
-module.exports = {
+export default {
   printWidth: 80,
   singleQuote: true,
   trailingComma: 'es5',