diff --git a/.env.example b/.env.example
new file mode 100644
index 0000000..359e938
--- /dev/null
+++ b/.env.example
@@ -0,0 +1,4 @@
+DATABASE_URL=
+JWT_ACCESS_SECRET=
+NODE_ENV=development
+PORT=3000
diff --git a/.eslintrc.cjs b/.eslintrc.cjs
index 9ee4867..2a7beb6 100644
--- a/.eslintrc.cjs
+++ b/.eslintrc.cjs
@@ -1,24 +1,8 @@
 module.exports = {
   root: true,
-  parser: '@typescript-eslint/parser',
-  parserOptions: { ecmaVersion: 'latest', sourceType: 'module' },
-  plugins: ['@typescript-eslint', 'react', 'react-hooks'],
-  extends: [
-    'eslint:recommended',
-    'plugin:@typescript-eslint/recommended',
-    'plugin:react/recommended',
-    'plugin:react-hooks/recommended',
-    'prettier'
-  ],
-  env: {
-    browser: true,
-    node: true,
-    es2021: true
-  },
-  settings: {
-    react: { version: 'detect' }
-  },
-  rules: {
-    'react/react-in-jsx-scope': 'off'
-  }
+  env: { node: true },
+  extends: ["eslint:recommended", "plugin:@typescript-eslint/recommended", "prettier"],
+  parser: "@typescript-eslint/parser",
+  plugins: ["@typescript-eslint"],
+  rules: {},
 };
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index ab7c517..51c2db0 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -2,50 +2,28 @@ name: CI
 
 on:
   push:
-    branches: [ main ]
+    branches: [main]
   pull_request:
-    branches: [ main ]
+    branches: [main]
 
 jobs:
   build:
     runs-on: ubuntu-latest
+
     steps:
-      - uses: actions/checkout@v4
+      - name: Checkout code
+        uses: actions/checkout@v3
 
-      - name: Use Node.js
-        uses: actions/setup-node@v4
+      - name: Use Node.js 18
+        uses: actions/setup-node@v3
         with:
-          node-version: '22'
-          cache: 'npm'
+          node-version: 18
 
       - name: Install dependencies
-        run: npm install
+        run: npm ci
 
       - name: Lint
         run: npm run lint
-        continue-on-error: true
 
       - name: Test
         run: npm test
-
-      - name: Build
-        run: npm run build
-
-      - name: Upload Pages artifact
-        if: success()
-        uses: actions/upload-pages-artifact@v1
-        with:
-          path: dist
-
-      - name: Deploy to GitHub Pages
-        if: success()
-        uses: actions/deploy-pages@v1
-
-      - name: Deploy to Vercel
-        if: success() && env.VERCEL_TOKEN != ''
-        run: |
-          npx vercel deploy --prod --token $VERCEL_TOKEN --confirm
-        env:
-          VERCEL_TOKEN: ${{ secrets.VERCEL_TOKEN }}
-          VERCEL_ORG_ID: ${{ secrets.VERCEL_ORG_ID }}
-          VERCEL_PROJECT_ID: ${{ secrets.VERCEL_PROJECT_ID }}
diff --git a/.prettierrc b/.prettierrc
index 7d2081a..0e64398 100644
--- a/.prettierrc
+++ b/.prettierrc
@@ -1,5 +1,6 @@
 {
   "singleQuote": true,
-  "semi": true,
-  "trailingComma": "all"
+  "tabWidth": 2,
+  "trailingComma": "es5",
+  "semi": true
 }
diff --git a/README.md b/README.md
index d4787e9..202bb30 100644
--- a/README.md
+++ b/README.md
@@ -27,8 +27,19 @@ npm install
 npm run dev
 ```
 
+Copy `.env.example` to `.env` and fill in the required values before starting the server.
+
 Use `start-all.sh` to run both the Node.js backend and Streamlit interface together.
 
+## Environment Variables
+
+Create a `.env` file based on `.env.example` with the following:
+
+- `DATABASE_URL`: Your Postgres connection string
+- `JWT_ACCESS_SECRET`: JWT signing key
+- `NODE_ENV`: `development`, `production`, or `test`
+- `PORT`: Optional server port (defaults to 3000)
+
 ## Folder Structure Overview
 
 - `client/` – React frontend powered by Vite
diff --git a/package-lock.json b/package-lock.json
index 24a1971..52ff1ba 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -69,6 +69,7 @@
         "lucide-react": "^0.453.0",
         "memorystore": "^1.6.7",
         "node-cron": "^4.0.7",
+        "nodemailer": "^6.9.11",
         "openai": "^4.103.0",
         "passport": "^0.7.0",
         "passport-local": "^1.0.0",
@@ -85,6 +86,7 @@
         "tailwind-merge": "^2.6.0",
         "tailwindcss-animate": "^1.0.7",
         "vaul": "^1.1.2",
+        "winston": "^3.10.0",
         "wouter": "^3.7.0",
         "ws": "^8.18.2",
         "zod": "^3.24.4",
@@ -104,25 +106,28 @@
         "@types/react": "^18.3.11",
         "@types/react-dom": "^18.3.1",
         "@types/ws": "^8.5.13",
-        "@typescript-eslint/eslint-plugin": "^7.0.1",
-        "@typescript-eslint/parser": "^7.0.1",
+        "@typescript-eslint/eslint-plugin": "^7.18.0",
+        "@typescript-eslint/parser": "^7.18.0",
         "@vitejs/plugin-react": "^4.4.1",
+        "@vitest/coverage-v8": "^3.2.2",
         "autoprefixer": "^10.4.21",
         "drizzle-kit": "^0.31.1",
         "esbuild": "^0.25.4",
-        "eslint": "^8.57.0",
+        "eslint": "^8.57.1",
         "eslint-config-prettier": "^9.1.0",
         "eslint-plugin-import": "^2.29.1",
         "eslint-plugin-react": "^7.33.2",
         "eslint-plugin-react-hooks": "^4.6.0",
         "jest": "^29.7.0",
         "postcss": "^8.5.3",
-        "prettier": "^3.2.5",
+        "prettier": "^3.5.3",
+        "supertest": "^7.1.1",
         "tailwindcss": "^3.4.14",
         "ts-jest": "^29.1.1",
         "tsx": "^4.19.4",
         "typescript": "^5.8.3",
-        "vite": "^6.3.5"
+        "vite": "^6.3.5",
+        "vitest": "^3.2.3"
       },
       "optionalDependencies": {
         "bufferutil": "^4.0.8"
@@ -711,6 +716,26 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/@colors/colors": {
+      "version": "1.6.0",
+      "resolved": "https://registry.npmjs.org/@colors/colors/-/colors-1.6.0.tgz",
+      "integrity": "sha512-Ir+AOibqzrIsL6ajt3Rz3LskB7OiMVHqltZmspbW/TJuTVuyOMirVqAkjfY6JISiLHgyNqicAC8AyHHGzNd/dA==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=0.1.90"
+      }
+    },
+    "node_modules/@dabh/diagnostics": {
+      "version": "2.0.3",
+      "resolved": "https://registry.npmjs.org/@dabh/diagnostics/-/diagnostics-2.0.3.tgz",
+      "integrity": "sha512-hrlQOIi7hAfzsMqlGSFyVucrx38O+j6wiGOf//H2ecvIEqYN4ADBSS2iLMh5UFyDunCNniUIPk/q3riFv45xRA==",
+      "license": "MIT",
+      "dependencies": {
+        "colorspace": "1.1.x",
+        "enabled": "2.0.x",
+        "kuler": "^2.0.0"
+      }
+    },
     "node_modules/@drizzle-team/brocli": {
       "version": "0.10.2",
       "resolved": "https://registry.npmjs.org/@drizzle-team/brocli/-/brocli-0.10.2.tgz",
@@ -2392,6 +2417,19 @@
         "@types/pg": "8.11.6"
       }
     },
+    "node_modules/@noble/hashes": {
+      "version": "1.8.0",
+      "resolved": "https://registry.npmjs.org/@noble/hashes/-/hashes-1.8.0.tgz",
+      "integrity": "sha512-jCs9ldd7NwzpgXDIf6P3+NrHh9/sD6CQdxHyjQI+h/6rDNo88ypBxxz45UDuZHz9r3tNz7N/VInSVoVdtXEI4A==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": "^14.21.3 || >=16"
+      },
+      "funding": {
+        "url": "https://paulmillr.com/funding/"
+      }
+    },
     "node_modules/@nodelib/fs.scandir": {
       "version": "2.1.5",
       "resolved": "https://registry.npmjs.org/@nodelib/fs.scandir/-/fs.scandir-2.1.5.tgz",
@@ -2427,6 +2465,16 @@
         "node": ">= 8"
       }
     },
+    "node_modules/@paralleldrive/cuid2": {
+      "version": "2.2.2",
+      "resolved": "https://registry.npmjs.org/@paralleldrive/cuid2/-/cuid2-2.2.2.tgz",
+      "integrity": "sha512-ZOBkgDwEdoYVlSeRbYYXs0S9MejQofiVYoTbKzy/6GQa39/q5tQU2IX46+shYnUkpEl3wc+J6wRlar7r2EK2xA==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@noble/hashes": "^1.1.5"
+      }
+    },
     "node_modules/@pkgjs/parseargs": {
       "version": "0.11.0",
       "resolved": "https://registry.npmjs.org/@pkgjs/parseargs/-/parseargs-0.11.0.tgz",
@@ -4286,6 +4334,16 @@
         "@types/node": "*"
       }
     },
+    "node_modules/@types/chai": {
+      "version": "5.2.2",
+      "resolved": "https://registry.npmjs.org/@types/chai/-/chai-5.2.2.tgz",
+      "integrity": "sha512-8kB30R7Hwqf40JPiKhVzodJs2Qc1ZJ5zuT3uzw5Hq/dhNCl3G3l83jfpdI1e20BP348+fV7VIL/+FxaXkqBmWg==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@types/deep-eql": "*"
+      }
+    },
     "node_modules/@types/connect": {
       "version": "3.4.38",
       "resolved": "https://registry.npmjs.org/@types/connect/-/connect-3.4.38.tgz",
@@ -4371,6 +4429,13 @@
       "integrity": "sha512-Ps3T8E8dZDam6fUyNiMkekK3XUsaUEik+idO9/YjPtfj2qruF8tFBXS7XhtE4iIXBLxhmLjP3SXpLhVf21I9Lw==",
       "license": "MIT"
     },
+    "node_modules/@types/deep-eql": {
+      "version": "4.0.2",
+      "resolved": "https://registry.npmjs.org/@types/deep-eql/-/deep-eql-4.0.2.tgz",
+      "integrity": "sha512-c9h9dVVMigMPc4bwTvC5dxqtqJZwQPePsWjPlpSOnojbor6pGqdk541lfA7AqFQr5pB1BRdq0juY9db81BwyFw==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/@types/estree": {
       "version": "1.0.7",
       "resolved": "https://registry.npmjs.org/@types/estree/-/estree-1.0.7.tgz",
@@ -4647,6 +4712,12 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/@types/triple-beam": {
+      "version": "1.3.5",
+      "resolved": "https://registry.npmjs.org/@types/triple-beam/-/triple-beam-1.3.5.tgz",
+      "integrity": "sha512-6WaYesThRMCl19iryMYP7/x2OVgCtbIVflDGFpWnb9irXI3UjYE4AzmYuiUKY1AJstGijoY+MgUszMgRxIYTYw==",
+      "license": "MIT"
+    },
     "node_modules/@types/ws": {
       "version": "8.5.13",
       "resolved": "https://registry.npmjs.org/@types/ws/-/ws-8.5.13.tgz",
@@ -4907,6 +4978,195 @@
         "vite": "^4.2.0 || ^5.0.0 || ^6.0.0"
       }
     },
+    "node_modules/@vitest/coverage-v8": {
+      "version": "3.2.3",
+      "resolved": "https://registry.npmjs.org/@vitest/coverage-v8/-/coverage-v8-3.2.3.tgz",
+      "integrity": "sha512-D1QKzngg8PcDoCE8FHSZhREDuEy+zcKmMiMafYse41RZpBE5EDJyKOTdqK3RQfsV2S2nyKor5KCs8PyPRFqKPg==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@ampproject/remapping": "^2.3.0",
+        "@bcoe/v8-coverage": "^1.0.2",
+        "ast-v8-to-istanbul": "^0.3.3",
+        "debug": "^4.4.1",
+        "istanbul-lib-coverage": "^3.2.2",
+        "istanbul-lib-report": "^3.0.1",
+        "istanbul-lib-source-maps": "^5.0.6",
+        "istanbul-reports": "^3.1.7",
+        "magic-string": "^0.30.17",
+        "magicast": "^0.3.5",
+        "std-env": "^3.9.0",
+        "test-exclude": "^7.0.1",
+        "tinyrainbow": "^2.0.0"
+      },
+      "funding": {
+        "url": "https://opencollective.com/vitest"
+      },
+      "peerDependencies": {
+        "@vitest/browser": "3.2.3",
+        "vitest": "3.2.3"
+      },
+      "peerDependenciesMeta": {
+        "@vitest/browser": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/@vitest/coverage-v8/node_modules/@bcoe/v8-coverage": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/@bcoe/v8-coverage/-/v8-coverage-1.0.2.tgz",
+      "integrity": "sha512-6zABk/ECA/QYSCQ1NGiVwwbQerUCZ+TQbp64Q3AgmfNvurHH0j8TtXa1qbShXA6qqkpAj4V5W8pP6mLe1mcMqA==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "node_modules/@vitest/coverage-v8/node_modules/istanbul-lib-source-maps": {
+      "version": "5.0.6",
+      "resolved": "https://registry.npmjs.org/istanbul-lib-source-maps/-/istanbul-lib-source-maps-5.0.6.tgz",
+      "integrity": "sha512-yg2d+Em4KizZC5niWhQaIomgf5WlL4vOOjZ5xGCmF8SnPE/mDWWXgvRExdcpCgh9lLRRa1/fSYp2ymmbJ1pI+A==",
+      "dev": true,
+      "license": "BSD-3-Clause",
+      "dependencies": {
+        "@jridgewell/trace-mapping": "^0.3.23",
+        "debug": "^4.1.1",
+        "istanbul-lib-coverage": "^3.0.0"
+      },
+      "engines": {
+        "node": ">=10"
+      }
+    },
+    "node_modules/@vitest/coverage-v8/node_modules/test-exclude": {
+      "version": "7.0.1",
+      "resolved": "https://registry.npmjs.org/test-exclude/-/test-exclude-7.0.1.tgz",
+      "integrity": "sha512-pFYqmTw68LXVjeWJMST4+borgQP2AyMNbg1BpZh9LbyhUeNkeaPF9gzfPGUAnSMV3qPYdWUwDIjjCLiSDOl7vg==",
+      "dev": true,
+      "license": "ISC",
+      "dependencies": {
+        "@istanbuljs/schema": "^0.1.2",
+        "glob": "^10.4.1",
+        "minimatch": "^9.0.4"
+      },
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "node_modules/@vitest/expect": {
+      "version": "3.2.3",
+      "resolved": "https://registry.npmjs.org/@vitest/expect/-/expect-3.2.3.tgz",
+      "integrity": "sha512-W2RH2TPWVHA1o7UmaFKISPvdicFJH+mjykctJFoAkUw+SPTJTGjUNdKscFBrqM7IPnCVu6zihtKYa7TkZS1dkQ==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@types/chai": "^5.2.2",
+        "@vitest/spy": "3.2.3",
+        "@vitest/utils": "3.2.3",
+        "chai": "^5.2.0",
+        "tinyrainbow": "^2.0.0"
+      },
+      "funding": {
+        "url": "https://opencollective.com/vitest"
+      }
+    },
+    "node_modules/@vitest/mocker": {
+      "version": "3.2.3",
+      "resolved": "https://registry.npmjs.org/@vitest/mocker/-/mocker-3.2.3.tgz",
+      "integrity": "sha512-cP6fIun+Zx8he4rbWvi+Oya6goKQDZK+Yq4hhlggwQBbrlOQ4qtZ+G4nxB6ZnzI9lyIb+JnvyiJnPC2AGbKSPA==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@vitest/spy": "3.2.3",
+        "estree-walker": "^3.0.3",
+        "magic-string": "^0.30.17"
+      },
+      "funding": {
+        "url": "https://opencollective.com/vitest"
+      },
+      "peerDependencies": {
+        "msw": "^2.4.9",
+        "vite": "^5.0.0 || ^6.0.0 || ^7.0.0-0"
+      },
+      "peerDependenciesMeta": {
+        "msw": {
+          "optional": true
+        },
+        "vite": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/@vitest/pretty-format": {
+      "version": "3.2.3",
+      "resolved": "https://registry.npmjs.org/@vitest/pretty-format/-/pretty-format-3.2.3.tgz",
+      "integrity": "sha512-yFglXGkr9hW/yEXngO+IKMhP0jxyFw2/qys/CK4fFUZnSltD+MU7dVYGrH8rvPcK/O6feXQA+EU33gjaBBbAng==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "tinyrainbow": "^2.0.0"
+      },
+      "funding": {
+        "url": "https://opencollective.com/vitest"
+      }
+    },
+    "node_modules/@vitest/runner": {
+      "version": "3.2.3",
+      "resolved": "https://registry.npmjs.org/@vitest/runner/-/runner-3.2.3.tgz",
+      "integrity": "sha512-83HWYisT3IpMaU9LN+VN+/nLHVBCSIUKJzGxC5RWUOsK1h3USg7ojL+UXQR3b4o4UBIWCYdD2fxuzM7PQQ1u8w==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@vitest/utils": "3.2.3",
+        "pathe": "^2.0.3",
+        "strip-literal": "^3.0.0"
+      },
+      "funding": {
+        "url": "https://opencollective.com/vitest"
+      }
+    },
+    "node_modules/@vitest/snapshot": {
+      "version": "3.2.3",
+      "resolved": "https://registry.npmjs.org/@vitest/snapshot/-/snapshot-3.2.3.tgz",
+      "integrity": "sha512-9gIVWx2+tysDqUmmM1L0hwadyumqssOL1r8KJipwLx5JVYyxvVRfxvMq7DaWbZZsCqZnu/dZedaZQh4iYTtneA==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@vitest/pretty-format": "3.2.3",
+        "magic-string": "^0.30.17",
+        "pathe": "^2.0.3"
+      },
+      "funding": {
+        "url": "https://opencollective.com/vitest"
+      }
+    },
+    "node_modules/@vitest/spy": {
+      "version": "3.2.3",
+      "resolved": "https://registry.npmjs.org/@vitest/spy/-/spy-3.2.3.tgz",
+      "integrity": "sha512-JHu9Wl+7bf6FEejTCREy+DmgWe+rQKbK+y32C/k5f4TBIAlijhJbRBIRIOCEpVevgRsCQR2iHRUH2/qKVM/plw==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "tinyspy": "^4.0.3"
+      },
+      "funding": {
+        "url": "https://opencollective.com/vitest"
+      }
+    },
+    "node_modules/@vitest/utils": {
+      "version": "3.2.3",
+      "resolved": "https://registry.npmjs.org/@vitest/utils/-/utils-3.2.3.tgz",
+      "integrity": "sha512-4zFBCU5Pf+4Z6v+rwnZ1HU1yzOKKvDkMXZrymE2PBlbjKJRlrOxbvpfPSvJTGRIwGoahaOGvp+kbCoxifhzJ1Q==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@vitest/pretty-format": "3.2.3",
+        "loupe": "^3.1.3",
+        "tinyrainbow": "^2.0.0"
+      },
+      "funding": {
+        "url": "https://opencollective.com/vitest"
+      }
+    },
     "node_modules/abort-controller": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/abort-controller/-/abort-controller-3.0.0.tgz",
@@ -5244,11 +5504,46 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
+    "node_modules/asap": {
+      "version": "2.0.6",
+      "resolved": "https://registry.npmjs.org/asap/-/asap-2.0.6.tgz",
+      "integrity": "sha512-BSHWgDSAiKs50o2Re8ppvp3seVHXSRM44cdSsT9FfNEUUZLOGWVCsiWaRPWM1Znn+mqZ1OfVZ3z3DWEzSp7hRA==",
+      "dev": true,
+      "license": "MIT"
+    },
+    "node_modules/assertion-error": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/assertion-error/-/assertion-error-2.0.1.tgz",
+      "integrity": "sha512-Izi8RQcffqCeNVgFigKli1ssklIbpHnCYc6AknXGYoB6grJqyeby7jv12JUQgmTAnIDnbck1uxksT4dzN3PWBA==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=12"
+      }
+    },
+    "node_modules/ast-v8-to-istanbul": {
+      "version": "0.3.3",
+      "resolved": "https://registry.npmjs.org/ast-v8-to-istanbul/-/ast-v8-to-istanbul-0.3.3.tgz",
+      "integrity": "sha512-MuXMrSLVVoA6sYN/6Hke18vMzrT4TZNbZIj/hvh0fnYFpO+/kFXcLIaiPwXXWaQUPg4yJD8fj+lfJ7/1EBconw==",
+      "dev": true,
+      "license": "MIT",
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+      "resolved": "https://registry.npmjs.org/picomatch/-/picomatch-4.0.2.tgz",
+      "integrity": "sha512-M7BAV6Rlcy5u+m6oPhAPFgJTzAioX/6B0DxyvDlo9l8+T3nLKbrczg2WLUyzd45L8RqfUMyGPzekbMvX2Ldkwg==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=12"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/jonschlinkert"
+      }
+    },
     "node_modules/void-elements": {
       "version": "3.1.0",
       "resolved": "https://registry.npmjs.org/void-elements/-/void-elements-3.1.0.tgz",
@@ -14386,6 +15260,59 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
+    "node_modules/why-is-node-running": {
+      "version": "2.3.0",
+      "resolved": "https://registry.npmjs.org/why-is-node-running/-/why-is-node-running-2.3.0.tgz",
+      "integrity": "sha512-hUrmaWBdVDcxvYqnyh09zunKzROWjbZTiNy8dBEjkS7ehEDQibXJ7XvlmtbwuTclUiIyN+CyXQD4Vmko8fNm8w==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "siginfo": "^2.0.0",
+        "stackback": "0.0.2"
+      },
+      "bin": {
+        "why-is-node-running": "cli.js"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
+    "node_modules/winston": {
+      "version": "3.17.0",
+      "resolved": "https://registry.npmjs.org/winston/-/winston-3.17.0.tgz",
+      "integrity": "sha512-DLiFIXYC5fMPxaRg832S6F5mJYvePtmO5G9v9IgUFPhXm9/GkXarH/TUrBAVzhTCzAj9anE/+GjrgXp/54nOgw==",
+      "license": "MIT",
+      "dependencies": {
+        "@colors/colors": "^1.6.0",
+        "@dabh/diagnostics": "^2.0.2",
+        "async": "^3.2.3",
+        "is-stream": "^2.0.0",
+        "logform": "^2.7.0",
+        "one-time": "^1.0.0",
+        "readable-stream": "^3.4.0",
+        "safe-stable-stringify": "^2.3.1",
+        "stack-trace": "0.0.x",
+        "triple-beam": "^1.3.0",
+        "winston-transport": "^4.9.0"
+      },
+      "engines": {
+        "node": ">= 12.0.0"
+      }
+    },
+    "node_modules/winston-transport": {
+      "version": "4.9.0",
+      "resolved": "https://registry.npmjs.org/winston-transport/-/winston-transport-4.9.0.tgz",
+      "integrity": "sha512-8drMJ4rkgaPo1Me4zD/3WLfI/zPdA9o2IipKODunnGDcuqbHwjsbB79ylv04LCGGzU0xQ6vTznOMpQGaLhhm6A==",
+      "license": "MIT",
+      "dependencies": {
+        "logform": "^2.7.0",
+        "readable-stream": "^3.6.2",
+        "triple-beam": "^1.3.0"
+      },
+      "engines": {
+        "node": ">= 12.0.0"
+      }
+    },
     "node_modules/word-wrap": {
       "version": "1.2.5",
       "resolved": "https://registry.npmjs.org/word-wrap/-/word-wrap-1.2.5.tgz",
diff --git a/package.json b/package.json
index 3dc1e34..b083427 100644
--- a/package.json
+++ b/package.json
@@ -10,7 +10,8 @@
     "check": "tsc",
     "db:push": "drizzle-kit push",
     "lint": "eslint . --ext .ts,.tsx",
-    "test": "jest"
+    "format": "prettier --write .",
+    "test": "vitest"
   },
   "dependencies": {
     "@anthropic-ai/sdk": "^0.37.0",
@@ -72,11 +73,8 @@
     "jspdf": "^2.5.1",
     "lucide-react": "^0.453.0",
     "memorystore": "^1.6.7",
-
-
-    "nodemailer": "^6.9.11",
-
     "node-cron": "^4.0.7",
+    "nodemailer": "^6.9.11",
     "openai": "^4.103.0",
     "passport": "^0.7.0",
     "passport-local": "^1.0.0",
@@ -93,11 +91,9 @@
     "tailwind-merge": "^2.6.0",
     "tailwindcss-animate": "^1.0.7",
     "vaul": "^1.1.2",
+    "winston": "^3.10.0",
     "wouter": "^3.7.0",
     "ws": "^8.18.2",
-
-    "winston": "^3.10.0",
-
     "zod": "^3.24.4",
     "zod-validation-error": "^3.4.1"
   },
@@ -108,43 +104,35 @@
     "@types/connect-pg-simple": "^7.0.3",
     "@types/express": "4.17.21",
     "@types/express-session": "^1.18.0",
+    "@types/jest": "^29.5.12",
     "@types/node": "20.16.11",
     "@types/passport": "^1.0.16",
     "@types/passport-local": "^1.0.38",
     "@types/react": "^18.3.11",
     "@types/react-dom": "^18.3.1",
     "@types/ws": "^8.5.13",
+    "@typescript-eslint/eslint-plugin": "^7.18.0",
+    "@typescript-eslint/parser": "^7.18.0",
     "@vitejs/plugin-react": "^4.4.1",
-
     "@vitest/coverage-v8": "^3.2.2",
-
     "autoprefixer": "^10.4.21",
     "drizzle-kit": "^0.31.1",
     "esbuild": "^0.25.4",
+    "eslint": "^8.57.1",
+    "eslint-config-prettier": "^9.1.0",
+    "eslint-plugin-import": "^2.29.1",
+    "eslint-plugin-react": "^7.33.2",
+    "eslint-plugin-react-hooks": "^4.6.0",
+    "jest": "^29.7.0",
     "postcss": "^8.5.3",
-
-
+    "prettier": "^3.5.3",
     "supertest": "^7.1.1",
-
     "tailwindcss": "^3.4.14",
+    "ts-jest": "^29.1.1",
     "tsx": "^4.19.4",
     "typescript": "^5.8.3",
     "vite": "^6.3.5",
-
-    "@typescript-eslint/eslint-plugin": "^7.0.1",
-    "@typescript-eslint/parser": "^7.0.1",
-    "eslint": "^8.57.0",
-    "eslint-config-prettier": "^9.1.0",
-    "eslint-plugin-react": "^7.33.2",
-    "eslint-plugin-react-hooks": "^4.6.0",
-    "eslint-plugin-import": "^2.29.1",
-    "prettier": "^3.2.5",
-    "jest": "^29.7.0",
-    "ts-jest": "^29.1.1",
-    "@types/jest": "^29.5.12"
-
-    "vitest": "^3.2.1"
-
+    "vitest": "^3.2.3"
   },
   "optionalDependencies": {
     "bufferutil": "^4.0.8"
diff --git a/server/db.ts b/server/db.ts
index 66779a9..3e8d4c3 100644
--- a/server/db.ts
+++ b/server/db.ts
@@ -2,14 +2,15 @@ import { Pool, neonConfig } from '@neondatabase/serverless';
 import { drizzle } from 'drizzle-orm/neon-serverless';
 import ws from "ws";
 import * as schema from "@shared/schema";
+import { env } from "./env";
 
 neonConfig.webSocketConstructor = ws;
 
-if (!process.env.DATABASE_URL) {
+if (!env.DATABASE_URL) {
   throw new Error(
     "DATABASE_URL must be set. Did you forget to provision a database?",
   );
 }
 
-export const pool = new Pool({ connectionString: process.env.DATABASE_URL });
+export const pool = new Pool({ connectionString: env.DATABASE_URL });
 export const db = drizzle({ client: pool, schema });
diff --git a/server/env.ts b/server/env.ts
new file mode 100644
index 0000000..f84f1f7
--- /dev/null
+++ b/server/env.ts
@@ -0,0 +1,17 @@
+import { z } from 'zod';
+
+const envSchema = z.object({
+  DATABASE_URL: z.string().url(),
+  JWT_ACCESS_SECRET: z.string(),
+  NODE_ENV: z.enum(['development', 'production', 'test']),
+  PORT: z.coerce.number().default(3000),
+});
+
+const parsed = envSchema.safeParse(process.env);
+
+if (!parsed.success) {
+  console.error('\u274c Invalid environment variables:', parsed.error.flatten().fieldErrors);
+  process.exit(1);
+}
+
+export const env = parsed.data;
diff --git a/server/index.ts b/server/index.ts
index 091bc78..a4e1f62 100644
--- a/server/index.ts
+++ b/server/index.ts
@@ -3,6 +3,7 @@ import { registerRoutes } from "./routes";
 import { setupVite, serveStatic, log } from "./vite";
 import { setAssetCacheHeaders } from "./cache-middleware";
 import { enforceHttps, securityHeaders } from "./https-middleware";
+import { env } from "./env";
 
 const app = express();
 
@@ -67,10 +68,8 @@ app.use((req, res, next) => {
     serveStatic(app);
   }
 
-  // ALWAYS serve the app on port 5000
-  // this serves both the API and the client.
-  // It is the only port that is not firewalled.
-  const port = 5000;
+  // Serve the app on the configured port
+  const port = env.PORT;
   server.listen({
     port,
     host: "0.0.0.0",
diff --git a/tests/basic.test.ts b/tests/basic.test.ts
new file mode 100644
index 0000000..8b9345b
--- /dev/null
+++ b/tests/basic.test.ts
@@ -0,0 +1,7 @@
+import { describe, it, expect } from 'vitest';
+
+describe('basic test', () => {
+  it('should pass', () => {
+    expect(1 + 1).toBe(2);
+  });
+});
diff --git a/tests/security-tests.ts b/tests/security-tests.ts
index c31026b..c67d3e7 100644
--- a/tests/security-tests.ts
+++ b/tests/security-tests.ts
@@ -10,7 +10,7 @@
  * - Edge cases and error handling
  */
 
-import { describe, it, expect, beforeEach, afterEach } from '@jest/globals';
+import { describe, it, expect, beforeEach, afterEach } from 'vitest';
 import request from 'supertest';
 import { Express } from 'express';
 import { storage } from '../server/storage';
diff --git a/tests/unit/sample.test.ts b/tests/unit/sample.test.ts
index b4e0b94..d62702d 100644
--- a/tests/unit/sample.test.ts
+++ b/tests/unit/sample.test.ts
@@ -1,4 +1,4 @@
-import { describe, it, expect } from '@jest/globals';
+import { describe, it, expect } from 'vitest';
 
 describe('basic math', () => {
   it('adds numbers', () => {
diff --git a/vitest.config.ts b/vitest.config.ts
new file mode 100644
index 0000000..c304f35
--- /dev/null
+++ b/vitest.config.ts
@@ -0,0 +1,7 @@
+import { defineConfig } from 'vitest/config';
+export default defineConfig({
+  test: {
+    globals: true,
+    environment: 'node',
+  },
+});