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

src/config.js

@@ -125,7 +125,7 @@ const config = {
   browserProtocolTimeout: envInt('BROWSER_PROTOCOL_TIMEOUT', 60_000),
 
   /** 截图 / 图片输出目录 */
-  outputDir: envStr('OUTPUT_DIR', resolve('output')),
+  outputDir: envStr('OUTPUT_DIR', join(projectRoot, 'gemini-image')),
 
   // ── Daemon 配置 ──
 

src/mcp-server.js

@@ -0,0 +1,141 @@
+import { McpServer } from "@modelcontextprotocol/sdk/server/mcp.js";
+import { StdioServerTransport } from "@modelcontextprotocol/sdk/server/stdio.js";
+import { z } from "zod";
+import { writeFileSync, mkdirSync } from "node:fs";
+import { join } from "node:path";
+
+// 复用已有的统一入口，不修改原有逻辑
+import { createGeminiSession, disconnect } from './index.js';
+import config from './config.js';
+
+const server = new McpServer({
+  name: "gemini-mcp-server",
+  version: "1.0.0",
+});
+
+// 注册工具
+server.registerTool(
+  "gemini_generate_image",
+  {
+    description: "调用后台的 Gemini 浏览器会话生成高质量图片",
+    inputSchema: {
+      prompt: z.string().describe("图片的详细描述词"),
+      newSession: z.boolean().default(false).describe(
+        "是否新建会话。true= 开启全新对话; false = 复用当前已有的 Gemini 会话页"
+      ),
+    },
+  },
+  async ({ prompt, newSession }) => {
+    try {
+      const { ops } = await createGeminiSession();
+      const result = await ops.generateImage(prompt, { newChat: newSession });
+
+      // 执行完毕立刻断开，交还给 Daemon 倒计时
+      disconnect();
+
+      if (!result.ok) {
+        return {
+          content: [{ type: "text", text: `生成失败: ${result.error}` }],
+          isError: true,
+        };
+      }
+
+      // 将 base64 写入本地文件
+      const base64Data = result.dataUrl.split(',')[1];
+      const mimeMatch = result.dataUrl.match(/^data:(image\/\w+);/);
+      const ext = mimeMatch ? mimeMatch[1].split('/')[1] : 'png';
+
+      mkdirSync(config.outputDir, { recursive: true });
+      const filename = `gemini_${Date.now()}.${ext}`;
+      const filePath = join(config.outputDir, filename);
+      writeFileSync(filePath, Buffer.from(base64Data, 'base64'));
+
+      console.error(`[mcp] 图片已保存至 ${filePath}`);
+
+      return {
+        content: [
+          { type: "text", text: `图片生成成功！已保存至: ${filePath}` },
+          {
+            type: "image",
+            data: base64Data,
+            mimeType: mimeMatch ? mimeMatch[1] : "image/png",
+          },
+        ],
+      };
+    } catch (err) {
+      return {
+        content: [{ type: "text", text: `执行崩溃: ${err.message}` }],
+        isError: true,
+      };
+    }
+  }
+);
+
+// 查询浏览器信息
+server.registerTool(
+  "gemini_browser_info",
+  {
+    description: "获取 Gemini 浏览器会话的连接信息（CDP 端口、WebSocket 地址、Daemon 状态等），方便外部工具直连浏览器",
+    inputSchema: {},
+  },
+  async () => {
+    const daemonUrl = `http://127.0.0.1:${config.daemonPort}`;
+
+    try {
+      // 1. 检查 Daemon 健康状态
+      const healthRes = await fetch(`${daemonUrl}/health`, { signal: AbortSignal.timeout(3000) });
+      const health = await healthRes.json();
+
+      if (!health.ok) {
+        return {
+          content: [{ type: "text", text: "Daemon 未就绪，浏览器可能未启动。请先调用 gemini_generate_image 触发自动启动。" }],
+          isError: true,
+        };
+      }
+
+      // 2. 获取浏览器连接信息
+      const acquireRes = await fetch(`${daemonUrl}/browser/acquire`, { signal: AbortSignal.timeout(5000) });
+      const acquire = await acquireRes.json();
+
+      const info = {
+        daemon: {
+          url: daemonUrl,
+          port: config.daemonPort,
+          status: "running",
+        },
+        browser: {
+          cdpPort: config.browserDebugPort,
+          wsEndpoint: acquire.wsEndpoint || null,
+          pid: acquire.pid || null,
+          headless: config.browserHeadless,
+        },
+        config: {
+          protocolTimeout: config.browserProtocolTimeout,
+          outputDir: config.outputDir,
+          daemonTTL: config.daemonTTL,
+        },
+      };
+
+      return {
+        content: [{ type: "text", text: JSON.stringify(info, null, 2) }],
+      };
+    } catch (err) {
+      return {
+        content: [{
+          type: "text",
+          text: `无法连接 Daemon (${daemonUrl})，浏览器可能未启动。\n错误: ${err.message}\n\n提示: 请先调用 gemini_generate_image 触发自动启动，或手动运行 npm run daemon`,
+        }],
+        isError: true,
+      };
+    }
+  }
+);
+
+// 启动标准输入输出通信
+async function run() {
+  const transport = new StdioServerTransport();
+  await server.connect(transport);
+  console.error("Gemini MCP Server running on stdio"); // 必须用 console.error，避免污染 stdio
+}
+
+run().catch(console.error);