chore: add TypeScript as explicit dev dependency

Add `typescript@^6.0.2` as an explicit devDependency instead of
relying on it being pulled in transitively. This ensures consistent
TypeScript version usage across the project and makes the dependency
requirement clear.

package-lock.json

@@ -24,7 +24,8 @@
       "devDependencies": {
         "react": "^19.0.0",
         "react-dom": "^19.0.0",
-        "tsup": "^8.0.0"
+        "tsup": "^8.0.0",
+        "typescript": "^6.0.2"
       },
       "peerDependencies": {
         "next": ">=14.0.0",
@@ -5286,6 +5287,20 @@
         "@esbuild/win32-x64": "0.27.7"
       }
     },
+    "node_modules/typescript": {
+      "version": "6.0.2",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-6.0.2.tgz",
+      "integrity": "sha512-bGdAIrZ0wiGDo5l8c++HWtbaNCWTS4UTv7RaTH/ThVIgjkveJt83m74bBHMJkuCbslY8ixgLBVZJIOiQlQTjfQ==",
+      "dev": true,
+      "license": "Apache-2.0",
+      "bin": {
+        "tsc": "bin/tsc",
+        "tsserver": "bin/tsserver"
+      },
+      "engines": {
+        "node": ">=14.17"
+      }
+    },
     "node_modules/ufo": {
       "version": "1.6.3",
       "resolved": "https://registry.npmjs.org/ufo/-/ufo-1.6.3.tgz",