diff --git a/frontend/css.d.ts b/frontend/css.d.ts
new file mode 100644
index 0000000..10522aa
--- /dev/null
+++ b/frontend/css.d.ts
@@ -0,0 +1,4 @@
+// TS 6 (TS2882) checks side-effect imports like `import './globals.css'`,
+// which Next 14's bundled types do not declare. Declare plain CSS modules
+// so the type checker accepts what the bundler already handles.
+declare module '*.css';
diff --git a/frontend/jest.config.js b/frontend/jest.config.js
index 55826a6..9fd5bce 100644
--- a/frontend/jest.config.js
+++ b/frontend/jest.config.js
@@ -12,6 +12,11 @@ module.exports = {
   transform: {
     // The app's tsconfig targets the bundler (module: esnext), which Node
     // cannot execute directly — override to commonjs for the test run only.
-    '^.+\\.ts$': ['ts-jest', { tsconfig: { module: 'commonjs', esModuleInterop: true } }],
+    // rootDir: TS 6 (TS5011) requires it explicit when the inferred common
+    // source directory (only the test files here) would mislay output paths.
+    '^.+\\.ts$': [
+      'ts-jest',
+      { tsconfig: { module: 'commonjs', esModuleInterop: true, rootDir: '.' } },
+    ],
   },
 };
diff --git a/frontend/package-lock.json b/frontend/package-lock.json
index 65a9e46..c733f83 100644
--- a/frontend/package-lock.json
+++ b/frontend/package-lock.json
@@ -25,7 +25,7 @@
         "postcss": "^8.4.0",
         "tailwindcss": "^3.4.0",
         "ts-jest": "^29.4.12",
-        "typescript": "^5.0.0"
+        "typescript": "^6.0.3"
       }
     },
     "node_modules/@alloc/quick-lru": {
@@ -1761,20 +1761,20 @@
       "license": "MIT"
     },
     "node_modules/@typescript-eslint/eslint-plugin": {
-      "version": "8.53.1",
-      "resolved": "https://registry.npmjs.org/@typescript-eslint/eslint-plugin/-/eslint-plugin-8.53.1.tgz",
-      "integrity": "sha512-cFYYFZ+oQFi6hUnBTbLRXfTJiaQtYE3t4O692agbBl+2Zy+eqSKWtPjhPXJu1G7j4RLjKgeJPDdq3EqOwmX5Ag==",
+      "version": "8.68.0",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/eslint-plugin/-/eslint-plugin-8.68.0.tgz",
+      "integrity": "sha512-WASHDpCm6qO5jj9g1a+8NiW5+GCkAyLReR56/4VruYmNgfUmqpxOfZ2Yfb8xGfJPWv5Qi6LSD8sXdces3vbp/Q==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
         "@eslint-community/regexpp": "^4.12.2",
-        "@typescript-eslint/scope-manager": "8.53.1",
-        "@typescript-eslint/type-utils": "8.53.1",
-        "@typescript-eslint/utils": "8.53.1",
-        "@typescript-eslint/visitor-keys": "8.53.1",
+        "@typescript-eslint/scope-manager": "8.68.0",
+        "@typescript-eslint/type-utils": "8.68.0",
+        "@typescript-eslint/utils": "8.68.0",
+        "@typescript-eslint/visitor-keys": "8.68.0",
         "ignore": "^7.0.5",
         "natural-compare": "^1.4.0",
-        "ts-api-utils": "^2.4.0"
+        "ts-api-utils": "^2.5.0"
       },
       "engines": {
         "node": "^18.18.0 || ^20.9.0 || >=21.1.0"
@@ -1784,15 +1784,15 @@
         "url": "https://opencollective.com/typescript-eslint"
       },
       "peerDependencies": {
-        "@typescript-eslint/parser": "^8.53.1",
-        "eslint": "^8.57.0 || ^9.0.0",
-        "typescript": ">=4.8.4 <6.0.0"
+        "@typescript-eslint/parser": "^8.68.0",
+        "eslint": "^8.57.0 || ^9.0.0 || ^10.0.0",
+        "typescript": ">=4.8.4 <6.1.0"
       }
     },
     "node_modules/@typescript-eslint/eslint-plugin/node_modules/ignore": {
-      "version": "7.0.5",
-      "resolved": "https://registry.npmjs.org/ignore/-/ignore-7.0.5.tgz",
-      "integrity": "sha512-Hs59xBNfUIunMFgWAbGX5cq6893IbWg4KnrjbYwX3tx0ztorVgTDA6B2sxf8ejHJ4wz8BqGUMYlnzNBer5NvGg==",
+      "version": "7.0.8",
+      "resolved": "https://registry.npmjs.org/ignore/-/ignore-7.0.8.tgz",
+      "integrity": "sha512-YYNsSlXBjMk92SKnkwvB5LOVSa6OznlFUGcsvrFgNJbJCd0M1XKeFVRc8ZByeCqz32FivYNHJVooLmdqrmvp/Q==",
       "dev": true,
       "license": "MIT",
       "engines": {
@@ -1800,16 +1800,16 @@
       }
     },
     "node_modules/@typescript-eslint/parser": {
-      "version": "8.53.1",
-      "resolved": "https://registry.npmjs.org/@typescript-eslint/parser/-/parser-8.53.1.tgz",
-      "integrity": "sha512-nm3cvFN9SqZGXjmw5bZ6cGmvJSyJPn0wU9gHAZZHDnZl2wF9PhHv78Xf06E0MaNk4zLVHL8hb2/c32XvyJOLQg==",
+      "version": "8.68.0",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/parser/-/parser-8.68.0.tgz",
+      "integrity": "sha512-fHq2VC1kpyYfvEcbiMjOpySY4WS7voEp89yAThrHRX5sm9j2lzYppCb2umFMEed4fWcyeLjHxrz0mpjNBaBxMQ==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
-        "@typescript-eslint/scope-manager": "8.53.1",
-        "@typescript-eslint/types": "8.53.1",
-        "@typescript-eslint/typescript-estree": "8.53.1",
-        "@typescript-eslint/visitor-keys": "8.53.1",
+        "@typescript-eslint/scope-manager": "8.68.0",
+        "@typescript-eslint/types": "8.68.0",
+        "@typescript-eslint/typescript-estree": "8.68.0",
+        "@typescript-eslint/visitor-keys": "8.68.0",
         "debug": "^4.4.3"
       },
       "engines": {
@@ -1820,19 +1820,19 @@
         "url": "https://opencollective.com/typescript-eslint"
       },
       "peerDependencies": {
-        "eslint": "^8.57.0 || ^9.0.0",
-        "typescript": ">=4.8.4 <6.0.0"
+        "eslint": "^8.57.0 || ^9.0.0 || ^10.0.0",
+        "typescript": ">=4.8.4 <6.1.0"
       }
     },
     "node_modules/@typescript-eslint/project-service": {
-      "version": "8.53.1",
-      "resolved": "https://registry.npmjs.org/@typescript-eslint/project-service/-/project-service-8.53.1.tgz",
-      "integrity": "sha512-WYC4FB5Ra0xidsmlPb+1SsnaSKPmS3gsjIARwbEkHkoWloQmuzcfypljaJcR78uyLA1h8sHdWWPHSLDI+MtNog==",
+      "version": "8.68.0",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/project-service/-/project-service-8.68.0.tgz",
+      "integrity": "sha512-5GQtWZCXFcFYux955pvoS02WLc49pXNlvIxocKjS0clvwo3in1RdlzVKyiqQH9vE5AKWFLTaUgeQkOrTS+0Qxw==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
-        "@typescript-eslint/tsconfig-utils": "^8.53.1",
-        "@typescript-eslint/types": "^8.53.1",
+        "@typescript-eslint/tsconfig-utils": "^8.68.0",
+        "@typescript-eslint/types": "^8.68.0",
         "debug": "^4.4.3"
       },
       "engines": {
@@ -1843,18 +1843,18 @@
         "url": "https://opencollective.com/typescript-eslint"
       },
       "peerDependencies": {
-        "typescript": ">=4.8.4 <6.0.0"
+        "typescript": ">=4.8.4 <6.1.0"
       }
     },
     "node_modules/@typescript-eslint/scope-manager": {
-      "version": "8.53.1",
-      "resolved": "https://registry.npmjs.org/@typescript-eslint/scope-manager/-/scope-manager-8.53.1.tgz",
-      "integrity": "sha512-Lu23yw1uJMFY8cUeq7JlrizAgeQvWugNQzJp8C3x8Eo5Jw5Q2ykMdiiTB9vBVOOUBysMzmRRmUfwFrZuI2C4SQ==",
+      "version": "8.68.0",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/scope-manager/-/scope-manager-8.68.0.tgz",
+      "integrity": "sha512-T5eXpcaJNg8bhjHJ8Rjp68Vq/QBteYtTKY8TZqVNPaUbuz0f6jI9t6aDkylwvalpAB9XTTFeFOjrjXAZ3YvmVA==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
-        "@typescript-eslint/types": "8.53.1",
-        "@typescript-eslint/visitor-keys": "8.53.1"
+        "@typescript-eslint/types": "8.68.0",
+        "@typescript-eslint/visitor-keys": "8.68.0"
       },
       "engines": {
         "node": "^18.18.0 || ^20.9.0 || >=21.1.0"
@@ -1865,9 +1865,9 @@
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     },
     "node_modules/@typescript-eslint/tsconfig-utils": {
-      "version": "8.53.1",
-      "resolved": "https://registry.npmjs.org/@typescript-eslint/tsconfig-utils/-/tsconfig-utils-8.53.1.tgz",
-      "integrity": "sha512-qfvLXS6F6b1y43pnf0pPbXJ+YoXIC7HKg0UGZ27uMIemKMKA6XH2DTxsEDdpdN29D+vHV07x/pnlPNVLhdhWiA==",
+      "version": "8.68.0",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/tsconfig-utils/-/tsconfig-utils-8.68.0.tgz",
+      "integrity": "sha512-F7zrGQfiJHojPwi8vhxZQC1tWtJzvL74cK/nqri2lk8YUXvYaYwl263xOJ69jDWPUk1hmcdoayFwk9lX09npVw==",
       "dev": true,
       "license": "MIT",
       "engines": {
@@ -1878,21 +1878,21 @@
         "url": "https://opencollective.com/typescript-eslint"
       },
       "peerDependencies": {
-        "typescript": ">=4.8.4 <6.0.0"
+        "typescript": ">=4.8.4 <6.1.0"
       }
     },
     "node_modules/@typescript-eslint/type-utils": {
-      "version": "8.53.1",
-      "resolved": "https://registry.npmjs.org/@typescript-eslint/type-utils/-/type-utils-8.53.1.tgz",
-      "integrity": "sha512-MOrdtNvyhy0rHyv0ENzub1d4wQYKb2NmIqG7qEqPWFW7Mpy2jzFC3pQ2yKDvirZB7jypm5uGjF2Qqs6OIqu47w==",
+      "version": "8.68.0",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/type-utils/-/type-utils-8.68.0.tgz",
+      "integrity": "sha512-X77zqoY1EjeWGs/0JNxeaMfp5C5lIz4Tw8y66F1Ne8Faq6g424sBNYM6xBAqElfGZPLpWS+CZAp0DXyKDzWiHg==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
-        "@typescript-eslint/types": "8.53.1",
-        "@typescript-eslint/typescript-estree": "8.53.1",
-        "@typescript-eslint/utils": "8.53.1",
+        "@typescript-eslint/types": "8.68.0",
+        "@typescript-eslint/typescript-estree": "8.68.0",
+        "@typescript-eslint/utils": "8.68.0",
         "debug": "^4.4.3",
-        "ts-api-utils": "^2.4.0"
+        "ts-api-utils": "^2.5.0"
       },
       "engines": {
         "node": "^18.18.0 || ^20.9.0 || >=21.1.0"
@@ -1902,14 +1902,14 @@
         "url": "https://opencollective.com/typescript-eslint"
       },
       "peerDependencies": {
-        "eslint": "^8.57.0 || ^9.0.0",
-        "typescript": ">=4.8.4 <6.0.0"
+        "eslint": "^8.57.0 || ^9.0.0 || ^10.0.0",
+        "typescript": ">=4.8.4 <6.1.0"
       }
     },
     "node_modules/@typescript-eslint/types": {
-      "version": "8.53.1",
-      "resolved": "https://registry.npmjs.org/@typescript-eslint/types/-/types-8.53.1.tgz",
-      "integrity": "sha512-jr/swrr2aRmUAUjW5/zQHbMaui//vQlsZcJKijZf3M26bnmLj8LyZUpj8/Rd6uzaek06OWsqdofN/Thenm5O8A==",
+      "version": "8.68.0",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/types/-/types-8.68.0.tgz",
+      "integrity": "sha512-9RnpsGJjrAllCMefGVVsImJM24YurhC0Q1h4UbvivtvOqXmR/vEJge2OoE++z9m6hyg8T1Q8t5SNT6tHSbrxcg==",
       "dev": true,
       "license": "MIT",
       "engines": {
@@ -1921,21 +1921,21 @@
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     },
     "node_modules/@typescript-eslint/typescript-estree": {
-      "version": "8.53.1",
-      "resolved": "https://registry.npmjs.org/@typescript-eslint/typescript-estree/-/typescript-estree-8.53.1.tgz",
-      "integrity": "sha512-RGlVipGhQAG4GxV1s34O91cxQ/vWiHJTDHbXRr0li2q/BGg3RR/7NM8QDWgkEgrwQYCvmJV9ichIwyoKCQ+DTg==",
+      "version": "8.68.0",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/typescript-estree/-/typescript-estree-8.68.0.tgz",
+      "integrity": "sha512-OKKsD0tYmoNiU5PW2zehO1yO56jYOm1ShYlxon/Z0SJNidAkdVg86eg9ruRuoXf8xfnuWZGbwDsStkoXbZtIIA==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
-        "@typescript-eslint/project-service": "8.53.1",
-        "@typescript-eslint/tsconfig-utils": "8.53.1",
-        "@typescript-eslint/types": "8.53.1",
-        "@typescript-eslint/visitor-keys": "8.53.1",
+        "@typescript-eslint/project-service": "8.68.0",
+        "@typescript-eslint/tsconfig-utils": "8.68.0",
+        "@typescript-eslint/types": "8.68.0",
+        "@typescript-eslint/visitor-keys": "8.68.0",
         "debug": "^4.4.3",
-        "minimatch": "^9.0.5",
+        "minimatch": "^10.2.2",
         "semver": "^7.7.3",
         "tinyglobby": "^0.2.15",
-        "ts-api-utils": "^2.4.0"
+        "ts-api-utils": "^2.5.0"
       },
       "engines": {
         "node": "^18.18.0 || ^20.9.0 || >=21.1.0"
@@ -1945,39 +1945,52 @@
         "url": "https://opencollective.com/typescript-eslint"
       },
       "peerDependencies": {
-        "typescript": ">=4.8.4 <6.0.0"
+        "typescript": ">=4.8.4 <6.1.0"
+      }
+    },
+    "node_modules/@typescript-eslint/typescript-estree/node_modules/balanced-match": {
+      "version": "4.0.4",
+      "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-4.0.4.tgz",
+      "integrity": "sha512-BLrgEcRTwX2o6gGxGOCNyMvGSp35YofuYzw9h1IMTRmKqttAZZVU67bdb9Pr2vUHA8+j3i2tJfjO6C6+4myGTA==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": "18 || 20 || >=22"
       }
     },
     "node_modules/@typescript-eslint/typescript-estree/node_modules/brace-expansion": {
-      "version": "2.0.2",
-      "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-2.0.2.tgz",
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+      "version": "5.0.9",
+      "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-5.0.9.tgz",
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       "dev": true,
       "license": "MIT",
       "dependencies": {
-        "balanced-match": "^1.0.0"
+        "balanced-match": "^4.0.2"
+      },
+      "engines": {
+        "node": "20 || >=22"
       }
     },
     "node_modules/@typescript-eslint/typescript-estree/node_modules/minimatch": {
-      "version": "9.0.5",
-      "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-9.0.5.tgz",
-      "integrity": "sha512-G6T0ZX48xgozx7587koeX9Ys2NYy6Gmv//P89sEte9V9whIapMNF4idKxnW2QtCcLiTWlb/wfCabAtAFWhhBow==",
+      "version": "10.2.6",
+      "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-10.2.6.tgz",
+      "integrity": "sha512-vpLQEs+VLCr1nU0BXS07maYoFwlDAH0gngQuuttxIwutDFEMHq2blX+8vpgxDdK3J1PwjCJiep77OitTZ4Ll1A==",
       "dev": true,
-      "license": "ISC",
+      "license": "BlueOak-1.0.0",
       "dependencies": {
-        "brace-expansion": "^2.0.1"
+        "brace-expansion": "^5.0.8"
       },
       "engines": {
-        "node": ">=16 || 14 >=14.17"
+        "node": "18 || 20 || >=22"
       },
       "funding": {
         "url": "https://github.com/sponsors/isaacs"
       }
     },
     "node_modules/@typescript-eslint/typescript-estree/node_modules/semver": {
-      "version": "7.7.3",
-      "resolved": "https://registry.npmjs.org/semver/-/semver-7.7.3.tgz",
-      "integrity": "sha512-SdsKMrI9TdgjdweUSR9MweHA4EJ8YxHn8DFaDisvhVlUOe4BF1tLD7GAj0lIqWVl+dPb/rExr0Btby5loQm20Q==",
+      "version": "7.8.5",
+      "resolved": "https://registry.npmjs.org/semver/-/semver-7.8.5.tgz",
+      "integrity": "sha512-Y7/KDsb8LjooZpwaqGyulO6DQlksgCncchHGk+sZIY4SBvUocMBEFH5Ur1fI4dV+Jvl0w6cjvucaIi40puRioA==",
       "dev": true,
       "license": "ISC",
       "bin": {
@@ -1988,16 +2001,16 @@
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-      "version": "8.53.1",
-      "resolved": "https://registry.npmjs.org/@typescript-eslint/utils/-/utils-8.53.1.tgz",
-      "integrity": "sha512-c4bMvGVWW4hv6JmDUEG7fSYlWOl3II2I4ylt0NM+seinYQlZMQIaKaXIIVJWt9Ofh6whrpM+EdDQXKXjNovvrg==",
+      "version": "8.68.0",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/utils/-/utils-8.68.0.tgz",
+      "integrity": "sha512-PB5gJMMOg0Q5P1tsgWtEAqQacJXq0qEqRHDX/YJ4FaTMLfZPpHB3gjl2EJuiZyPABxmj4ZQYiY9m1bdAJ5y7tQ==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
         "@eslint-community/eslint-utils": "^4.9.1",
-        "@typescript-eslint/scope-manager": "8.53.1",
-        "@typescript-eslint/types": "8.53.1",
-        "@typescript-eslint/typescript-estree": "8.53.1"
+        "@typescript-eslint/scope-manager": "8.68.0",
+        "@typescript-eslint/types": "8.68.0",
+        "@typescript-eslint/typescript-estree": "8.68.0"
       },
       "engines": {
         "node": "^18.18.0 || ^20.9.0 || >=21.1.0"
@@ -2007,19 +2020,19 @@
         "url": "https://opencollective.com/typescript-eslint"
       },
       "peerDependencies": {
-        "eslint": "^8.57.0 || ^9.0.0",
-        "typescript": ">=4.8.4 <6.0.0"
+        "eslint": "^8.57.0 || ^9.0.0 || ^10.0.0",
+        "typescript": ">=4.8.4 <6.1.0"
       }
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     "node_modules/@typescript-eslint/visitor-keys": {
-      "version": "8.53.1",
-      "resolved": "https://registry.npmjs.org/@typescript-eslint/visitor-keys/-/visitor-keys-8.53.1.tgz",
-      "integrity": "sha512-oy+wV7xDKFPRyNggmXuZQSBzvoLnpmJs+GhzRhPjrxl2b/jIlyjVokzm47CZCDUdXKr2zd7ZLodPfOBpOPyPlg==",
+      "version": "8.68.0",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/visitor-keys/-/visitor-keys-8.68.0.tgz",
+      "integrity": "sha512-YR65gGdGvTUAWLldC3xLOvOzamdGzB4A5/N8rehEaHs3Zvoe39BhgY+u0SPch1OvrVTfLcc55wsSgK2NcnTS/A==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
-        "@typescript-eslint/types": "8.53.1",
-        "eslint-visitor-keys": "^4.2.1"
+        "@typescript-eslint/types": "8.68.0",
+        "eslint-visitor-keys": "^5.0.0"
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       "engines": {
         "node": "^18.18.0 || ^20.9.0 || >=21.1.0"
@@ -2029,6 +2042,19 @@
         "url": "https://opencollective.com/typescript-eslint"
       }
     },
+    "node_modules/@typescript-eslint/visitor-keys/node_modules/eslint-visitor-keys": {
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/eslint-visitor-keys/-/eslint-visitor-keys-5.0.1.tgz",
+      "integrity": "sha512-tD40eHxA35h0PEIZNeIjkHoDR4YjjJp34biM0mDvplBe//mB+IHCqHDGV7pxF+7MklTvighcCPPZC7ynWyjdTA==",
+      "dev": true,
+      "license": "Apache-2.0",
+      "engines": {
+        "node": "^20.19.0 || ^22.13.0 || >=24"
+      },
+      "funding": {
+        "url": "https://opencollective.com/eslint"
+      }
+    },
     "node_modules/@unrs/resolver-binding-android-arm-eabi": {
       "version": "1.11.1",
       "resolved": "https://registry.npmjs.org/@unrs/resolver-binding-android-arm-eabi/-/resolver-binding-android-arm-eabi-1.11.1.tgz",
@@ -8302,9 +8328,9 @@
       }
     },
     "node_modules/ts-api-utils": {
-      "version": "2.4.0",
-      "resolved": "https://registry.npmjs.org/ts-api-utils/-/ts-api-utils-2.4.0.tgz",
-      "integrity": "sha512-3TaVTaAv2gTiMB35i3FiGJaRfwb3Pyn/j3m/bfAvGe8FB7CF6u+LMYqYlDh7reQf7UNvoTvdfAqHGmPGOSsPmA==",
+      "version": "2.5.0",
+      "resolved": "https://registry.npmjs.org/ts-api-utils/-/ts-api-utils-2.5.0.tgz",
+      "integrity": "sha512-OJ/ibxhPlqrMM0UiNHJ/0CKQkoKF243/AEmplt3qpRgkW8VG7IfOS41h7V8TjITqdByHzrjcS/2si+y4lIh8NA==",
       "dev": true,
       "license": "MIT",
       "engines": {
@@ -8547,9 +8573,9 @@
       }
     },
     "node_modules/typescript": {
-      "version": "5.9.3",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.9.3.tgz",
-      "integrity": "sha512-jl1vZzPDinLr9eUt3J/t7V6FgNEw9QjvBPdysz9KfQDD41fQrC2Y4vKQdiaUpFT4bXlb1RHhLpp8wtm6M5TgSw==",
+      "version": "6.0.3",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-6.0.3.tgz",
+      "integrity": "sha512-y2TvuxSZPDyQakkFRPZHKFm+KKVqIisdg9/CZwm9ftvKXLP8NRWj38/ODjNbr43SsoXqNuAisEf1GdCxqWcdBw==",
       "dev": true,
       "license": "Apache-2.0",
       "bin": {
@@ -8561,16 +8587,16 @@
       }
     },
     "node_modules/typescript-eslint": {
-      "version": "8.53.1",
-      "resolved": "https://registry.npmjs.org/typescript-eslint/-/typescript-eslint-8.53.1.tgz",
-      "integrity": "sha512-gB+EVQfP5RDElh9ittfXlhZJdjSU4jUSTyE2+ia8CYyNvet4ElfaLlAIqDvQV9JPknKx0jQH1racTYe/4LaLSg==",
+      "version": "8.68.0",
+      "resolved": "https://registry.npmjs.org/typescript-eslint/-/typescript-eslint-8.68.0.tgz",
+      "integrity": "sha512-MHy0Y0ynqeEbx/S45+i/bBssdy3X6KNBfmJAP35GrgtNxu2TQ5K5xsFDhAnmsq1jvpdoZOPG1LGtJo0HWqYCrQ==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
-        "@typescript-eslint/eslint-plugin": "8.53.1",
-        "@typescript-eslint/parser": "8.53.1",
-        "@typescript-eslint/typescript-estree": "8.53.1",
-        "@typescript-eslint/utils": "8.53.1"
+        "@typescript-eslint/eslint-plugin": "8.68.0",
+        "@typescript-eslint/parser": "8.68.0",
+        "@typescript-eslint/typescript-estree": "8.68.0",
+        "@typescript-eslint/utils": "8.68.0"
       },
       "engines": {
         "node": "^18.18.0 || ^20.9.0 || >=21.1.0"
@@ -8580,8 +8606,8 @@
         "url": "https://opencollective.com/typescript-eslint"
       },
       "peerDependencies": {
-        "eslint": "^8.57.0 || ^9.0.0",
-        "typescript": ">=4.8.4 <6.0.0"
+        "eslint": "^8.57.0 || ^9.0.0 || ^10.0.0",
+        "typescript": ">=4.8.4 <6.1.0"
       }
     },
     "node_modules/uglify-js": {
diff --git a/frontend/package.json b/frontend/package.json
index 94f53e1..1efa7a3 100644
--- a/frontend/package.json
+++ b/frontend/package.json
@@ -28,6 +28,6 @@
     "postcss": "^8.4.0",
     "tailwindcss": "^3.4.0",
     "ts-jest": "^29.4.12",
-    "typescript": "^5.0.0"
+    "typescript": "^6.0.3"
   }
 }
diff --git a/frontend/tsconfig.json b/frontend/tsconfig.json
index 522b6a0..ac1935a 100644
--- a/frontend/tsconfig.json
+++ b/frontend/tsconfig.json
@@ -12,6 +12,7 @@
     "isolatedModules": true,
     "jsx": "preserve",
     "incremental": true,
+    "types": ["node", "jest"],
     "plugins": [{ "name": "next" }],
     "paths": {
       "@/*": ["./*"]
diff --git a/package-lock.json b/package-lock.json
index 8499f6e..414ec7c 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -15,7 +15,7 @@
         "@types/node": "^26.3.0",
         "concurrently": "^8.0.0",
         "prettier": "3.9.6",
-        "typescript": "^5.0.0"
+        "typescript": "^6.0.3"
       },
       "engines": {
         "node": ">=20",
@@ -9424,9 +9424,9 @@
       "license": "MIT"
     },
     "node_modules/typescript": {
-      "version": "5.9.2",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.9.2.tgz",
-      "integrity": "sha512-CWBzXQrc/qOkhidw1OzBTQuYRbfyxDXJMVJ1XNwUHGROVmuaeiEm3OslpZ1RV96d7SKKjZKrSJu3+t/xlw3R9A==",
+      "version": "6.0.3",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-6.0.3.tgz",
+      "integrity": "sha512-y2TvuxSZPDyQakkFRPZHKFm+KKVqIisdg9/CZwm9ftvKXLP8NRWj38/ODjNbr43SsoXqNuAisEf1GdCxqWcdBw==",
       "dev": true,
       "license": "Apache-2.0",
       "bin": {
@@ -9878,7 +9878,7 @@
         "@types/node": "^26.3.0",
         "nodemon": "^3.1.14",
         "tsx": "^4.23.12",
-        "typescript": "^5.0.0"
+        "typescript": "^6.0.3"
       }
     },
     "services/matching": {
@@ -9898,7 +9898,7 @@
         "@types/node": "^26.3.0",
         "nodemon": "^3.1.14",
         "tsx": "^4.23.12",
-        "typescript": "^5.0.0"
+        "typescript": "^6.0.3"
       }
     },
     "services/notification": {
@@ -9918,7 +9918,7 @@
         "@types/node": "^26.3.0",
         "nodemon": "^3.1.14",
         "tsx": "^4.23.12",
-        "typescript": "^5.0.0"
+        "typescript": "^6.0.3"
       }
     },
     "services/reporting": {
@@ -9963,14 +9963,14 @@
         "nodemon": "^3.1.14",
         "ts-jest": "^29.4.12",
         "tsx": "^4.23.12",
-        "typescript": "^5.0.0"
+        "typescript": "^6.0.3"
       }
     },
     "shared/types": {
       "name": "@sbb-lost-found/types",
       "version": "1.0.0",
       "devDependencies": {
-        "typescript": "^5.0.0"
+        "typescript": "^6.0.3"
       }
     }
   }
diff --git a/package.json b/package.json
index e70ce24..4461494 100644
--- a/package.json
+++ b/package.json
@@ -29,7 +29,7 @@
     "@types/node": "^26.3.0",
     "concurrently": "^8.0.0",
     "prettier": "3.9.6",
-    "typescript": "^5.0.0"
+    "typescript": "^6.0.3"
   },
   "engines": {
     "node": ">=20",
diff --git a/services/api-gateway/package.json b/services/api-gateway/package.json
index fb003ea..8a1363c 100644
--- a/services/api-gateway/package.json
+++ b/services/api-gateway/package.json
@@ -22,7 +22,7 @@
   "devDependencies": {
     "@types/node": "^26.3.0",
     "@types/express": "^4.17.17",
-    "typescript": "^5.0.0",
+    "typescript": "^6.0.3",
     "tsx": "^4.23.12",
     "nodemon": "^3.1.14"
   }
diff --git a/services/matching/package.json b/services/matching/package.json
index 7ce7ea4..5afca38 100644
--- a/services/matching/package.json
+++ b/services/matching/package.json
@@ -23,7 +23,7 @@
   "devDependencies": {
     "@types/node": "^26.3.0",
     "@types/express": "^4.17.17",
-    "typescript": "^5.0.0",
+    "typescript": "^6.0.3",
     "tsx": "^4.23.12",
     "nodemon": "^3.1.14"
   }
diff --git a/services/notification/package.json b/services/notification/package.json
index 1271f90..e6c2d47 100644
--- a/services/notification/package.json
+++ b/services/notification/package.json
@@ -23,7 +23,7 @@
   "devDependencies": {
     "@types/node": "^26.3.0",
     "@types/express": "^4.17.17",
-    "typescript": "^5.0.0",
+    "typescript": "^6.0.3",
     "tsx": "^4.23.12",
     "nodemon": "^3.1.14"
   }
diff --git a/services/reporting/jest.config.js b/services/reporting/jest.config.js
index 448feec..d2c56b4 100644
--- a/services/reporting/jest.config.js
+++ b/services/reporting/jest.config.js
@@ -1,6 +1,15 @@
-/** ts-jest, matching the jest 29 + ts-jest 29 already in devDependencies. */
+/** ts-jest, matching the jest 30 + ts-jest 29 already in devDependencies. */
 module.exports = {
-  preset: 'ts-jest',
   testEnvironment: 'node',
   testMatch: ['<rootDir>/src/**/__tests__/**/*.test.ts'],
+  transform: {
+    '^.+\\.tsx?$': [
+      'ts-jest',
+      {
+        // TS 6 no longer auto-includes @types packages hoisted to a parent
+        // node_modules, so the jest globals must be named explicitly.
+        tsconfig: { types: ['jest', 'node'] },
+      },
+    ],
+  },
 };
diff --git a/services/reporting/package.json b/services/reporting/package.json
index 801a572..54509c0 100644
--- a/services/reporting/package.json
+++ b/services/reporting/package.json
@@ -47,7 +47,7 @@
     "@types/swagger-jsdoc": "^6.0.1",
     "@types/swagger-ui-express": "^4.1.3",
     "@types/jest": "^30.0.0",
-    "typescript": "^5.0.0",
+    "typescript": "^6.0.3",
     "tsx": "^4.23.12",
     "nodemon": "^3.1.14",
     "jest": "^30.4.2",
diff --git a/services/reporting/tsconfig.json b/services/reporting/tsconfig.json
index 50a9568..06a9516 100644
--- a/services/reporting/tsconfig.json
+++ b/services/reporting/tsconfig.json
@@ -1,7 +1,7 @@
 {
   "compilerOptions": {
     "target": "ES2022",
-    "module": "commonjs",
+    "module": "node16",
     "lib": ["ES2022"],
     "outDir": "./dist",
     "rootDir": "./src",
@@ -12,7 +12,7 @@
     "experimentalDecorators": true,
     "emitDecoratorMetadata": true,
     "resolveJsonModule": true,
-    "moduleResolution": "node"
+    "moduleResolution": "node16"
   },
   "include": ["src/**/*"],
   "exclude": ["node_modules", "dist", "**/*.test.ts"]
diff --git a/shared/types/package.json b/shared/types/package.json
index f1a286b..0851b82 100644
--- a/shared/types/package.json
+++ b/shared/types/package.json
@@ -12,6 +12,6 @@
     "typecheck": "tsc --noEmit"
   },
   "devDependencies": {
-    "typescript": "^5.0.0"
+    "typescript": "^6.0.3"
   }
 }