chore: 终审 Minor 清理——@types/node 钉 22、contracts 构建排除测试、helpers 盲区注记、计划收口注记

Co-Authored-By: Claude Code <noreply@anthropic.com>

packages/contracts/package.json

@@ -12,7 +12,7 @@
     }
   },
   "scripts": {
-    "build": "tsc -p tsconfig.json",
+    "build": "tsc -p tsconfig.build.json",
     "typecheck": "tsc -p tsconfig.json --noEmit"
   }
 }

packages/contracts/tsconfig.build.json

@@ -0,0 +1,7 @@
+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "rootDir": "."
+  },
+  "exclude": ["test"]
+}