MAESTRO: Fix linting config and formatting

frontend/package-lock.json

@@ -27,6 +27,7 @@
         "eslint": "^9.39.2",
         "eslint-config-next": "16.1.6",
         "jsdom": "^28.1.0",
+        "prettier": "^3.8.1",
         "tailwindcss": "^4",
         "typescript": "^5",
         "vitest": "^4.0.18"
@@ -7003,6 +7004,22 @@
         "node": ">= 0.8.0"
       }
     },
+    "node_modules/prettier": {
+      "version": "3.8.1",
+      "resolved": "https://registry.npmjs.org/prettier/-/prettier-3.8.1.tgz",
+      "integrity": "sha512-UOnG6LftzbdaHZcKoPFtOcCKztrQ57WkHDeRD9t/PTQtmT0NHSeWWepj6pS0z/N7+08BHFDQVUrfmfMRcZwbMg==",
+      "dev": true,
+      "license": "MIT",
+      "bin": {
+        "prettier": "bin/prettier.cjs"
+      },
+      "engines": {
+        "node": ">=14"
+      },
+      "funding": {
+        "url": "https://github.com/prettier/prettier?sponsor=1"
+      }
+    },
     "node_modules/prop-types": {
       "version": "15.8.1",
       "resolved": "https://registry.npmjs.org/prop-types/-/prop-types-15.8.1.tgz",