feat(mcp): integrate MCP Server into backend service as built-in endpoint

- Add MCP Controller and register /mcp route
- MCP Server now uses OpenAPI Token for authentication
- Update frontend settings to show built-in MCP endpoint config
- Update docs to reflect integrated MCP endpoint

internal/router/mcp.go

@@ -0,0 +1,20 @@
+package router
+
+import (
+	"github.com/engigu/taskpool/internal/middleware"
+	"github.com/gin-gonic/gin"
+)
+
+// initMCPRoutes 初始化 MCP Server 路由
+// 使用 OpenAPI Token 进行鉴权
+func initMCPRoutes(root *gin.RouterGroup, c *Controllers) {
+	// MCP 路由组 (使用 Bearer Token 鉴权，复用 OpenAPI 中间件)
+	mcp := root.Group("/mcp")
+	mcp.Use(middleware.OpenapiRequired())
+	{
+		// 所有 MCP 请求都通过同一个 handler 处理
+		// StreamableHTTP 协议支持 POST 和 GET
+		mcp.POST("/*action", c.MCP.HandleMCP)
+		mcp.GET("/*action", c.MCP.HandleMCP)
+	}
+}

internal/router/register.go

@@ -72,6 +72,7 @@ func RegisterControllers() *Controllers {
 		Interconnect: controllers.NewInterconnectController(interconnectService),
 		Data:         controllers.NewDataController(taskController, envController),
 		Install:      controllers.NewInstallController(),
+		MCP:          controllers.NewMCPController(),
 	}
 }
 

internal/router/router.go

@@ -35,6 +35,7 @@ type Controllers struct {
 	Interconnect *controllers.InterconnectController
 	Data         *controllers.DataController
 	Install      *controllers.InstallController
+	MCP          *controllers.MCPController
 }
 
 func Setup(c *Controllers) *gin.Engine {
@@ -79,6 +80,9 @@ func Setup(c *Controllers) *gin.Engine {
 	initAgentAPIRoutes(root, c)
 	initOpenAPIV1Routes(root, c)
 
+	// 5. [ location /mcp ] MCP Server 路由（供 AI Agent 使用）
+	initMCPRoutes(root, c)
+
 	// =========================================================================
 	// [ location / ] 全局 404 兜底与 SPA 渲染
 	// 对应 Nginx: try_files $uri $uri/ /index.html;