feat(mcp): 引入官方 mcp/sdk，PHP 最低版本抬升至 8.1

composer.json

@@ -17,7 +17,7 @@
     }
   ],
   "require": {
-    "php": ">=8.0.0",
+    "php": ">=8.1.0",
     "ext-json": "*",
     "ext-fileinfo": "*",
     "topthink/framework": "^8.0",
@@ -25,6 +25,7 @@
     "topthink/think-multi-app": "^1.0",
     "topthink/think-captcha": "^3.0",
     "guzzlehttp/guzzle": "^7.4",
+    "guzzlehttp/psr7": "^2.0",
     "phpoffice/phpspreadsheet": "^1.22",
     "doctrine/annotations": "2.*",
     "league/flysystem": "^3.0",
@@ -32,6 +33,7 @@
     "overtrue/flysystem-cos": "^5.0",
     "iidestiny/flysystem-oss": "^4.0",
     "czproject/git-php": "^4.2",
+    "mcp/sdk": "^0.7",
     "psr/simple-cache": ">=1.0"
   },
   "require-dev": {