chore(deps): update dependency typescript to v6

Author: renovate[bot]

client/package.json

@@ -53,7 +53,7 @@
     "globals": "17.4.0",
     "jsdom": "29.0.0",
     "prettier": "3.8.1",
-    "typescript": "5.9.3",
+    "typescript": "6.0.2",
     "typescript-eslint": "8.57.1",
     "vite": "8.0.1",
     "vitest": "4.1.0"