fix(dev): bind frontend to 127.0.0.1:8080 and avoid EACCES\nfix(backend): bind server to 127.0.0.1:8081, add permissive CORS whitelist\nfix(auth): login form UX remove default username, clarify placeholder, add test account autofill\nchore(api): set frontend API_BASE_URL to 127.0.0.1:8081\nrefactor(assignments): lifecycle/state logic and archive endpoint\nfeat(analytics): add exam stats endpoint and client method\nchore(lint): add eslint configs

.eslintrc.json

@@ -0,0 +1,17 @@
+{
+  "root": true,
+  "extends": ["next/core-web-vitals"],
+  "parserOptions": {
+    "ecmaVersion": 2021,
+    "sourceType": "module",
+    "project": ["./tsconfig.json"],
+    "tsconfigRootDir": "."
+  },
+  "ignorePatterns": [
+    "node_modules/",
+    ".next/",
+    "backend/dist/",
+    "backend/node_modules/",
+    "dist/"
+  ]
+}