chore: bump major dependencies

typescript 5.9.3 → 6.0.3, lucide-react 0.575.0 → 1.8.0,
@types/node 20.19.39 → 25.6.0, shadcn 3.8.5 → 4.4.0.
All verified with typecheck and lint — no breaking changes.

package.json

@@ -23,7 +23,7 @@
     "class-variance-authority": "^0.7.1",
     "clsx": "^2.1.1",
     "cmdk": "^1.1.1",
-    "lucide-react": "^0.575.0",
+    "lucide-react": "^1.8.0",
     "next": "16.2.4",
     "next-themes": "^0.4.6",
     "radix-ui": "^1.4.3",
@@ -37,7 +37,7 @@
   },
   "devDependencies": {
     "@tailwindcss/postcss": "^4.2.4",
-    "@types/node": "^20.19.39",
+    "@types/node": "^25.6.0",
     "@types/react": "^19.2.14",
     "@types/react-dom": "^19.2.3",
     "@typescript-eslint/eslint-plugin": "^8.59.0",
@@ -48,10 +48,10 @@
     "eslint-plugin-react-hooks": "^7.1.1",
     "prettier": "^3.8.3",
     "prettier-plugin-organize-imports": "^4.3.0",
-    "shadcn": "^3.8.5",
+    "shadcn": "^4.4.0",
     "tailwindcss": "^4.2.4",
     "tw-animate-css": "^1.4.0",
-    "typescript": "^5.9.3",
+    "typescript": "^6.0.3",
     "vitest": "^4.1.5"
   }
 }