refactor(mcp): 封装浏览器操作为 MCP 工具，移除手动浏览器操控逻辑

package.json

@@ -5,8 +5,8 @@
   "main": "src/index.js",
   "scripts": {
     "demo": "node src/demo.js",
-    "daemon": "node src/daemon/server.js",
-    "test": "echo \"Error: no test specified\" && exit 1"
+    "mcp": "node src/mcp-server.js",
+    "daemon": "node src/daemon/server.js"
   },
   "keywords": [
     "gemini",
@@ -18,6 +18,7 @@
   "license": "ISC",
   "description": "通过 CDP 操控 Gemini 网页进行 AI 问答与生图",
   "dependencies": {
+    "@modelcontextprotocol/sdk": "^1.27.1",
     "puppeteer-core": "^24.39.1",
     "puppeteer-extra": "^3.3.6",
     "puppeteer-extra-plugin-stealth": "^2.11.2"