auth tests

frontend/package.json

@@ -8,11 +8,15 @@
     "build": "vite build",
     "preview": "vite preview",
     "type-check": "tsc --noEmit",
+    "lint:css": "stylelint \"src/**/*.css\"",
+    "lint:css:fix": "stylelint --fix \"src/**/*.css\"",
     "test": "vitest run --coverage --passWithNoTests",
     "test:watch": "vitest"
   },
   "devDependencies": {
     "@tailwindcss/vite": "^4.3.1",
+    "stylelint": "^17.13.0",
+    "stylelint-config-standard": "^40.0.0",
     "@types/leaflet": "^1.9.21",
     "@types/node": "^25.9.3",
     "@vitest/coverage-v8": "^4.1.8",