fix: implement MCP Streamable HTTP protocol for Cursor integration

- Replace basic JSON-RPC implementation with Streamable HTTP protocol
- Add support for GET (SSE) and POST (JSON-RPC) requests
- Update protocol version from 2024-11-05 to 2025-03-26
- Fix list_feeds tool definition to match actual API (remove unused page/pageSize params)
- Add ping method support for MCP Inspector
- Update Cursor configuration to use url field instead of curl command
- Add comprehensive MCP integration documentation

Fixes #32

🤖 Generated with [Claude Code](https://claude.ai/code)

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

mcp_handlers.go

@@ -0,0 +1,165 @@
+package main
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+
+	"github.com/sirupsen/logrus"
+)
+
+// MCP 工具处理函数
+
+// handleCheckLoginStatus 处理检查登录状态
+func (s *AppServer) handleCheckLoginStatus(ctx context.Context) *MCPToolResult {
+	logrus.Info("MCP: 检查登录状态")
+
+	status, err := s.xiaohongshuService.CheckLoginStatus(ctx)
+	if err != nil {
+		return &MCPToolResult{
+			Content: []MCPContent{{
+				Type: "text",
+				Text: "检查登录状态失败: " + err.Error(),
+			}},
+			IsError: true,
+		}
+	}
+
+	resultText := fmt.Sprintf("登录状态检查成功: %+v", status)
+	return &MCPToolResult{
+		Content: []MCPContent{{
+			Type: "text",
+			Text: resultText,
+		}},
+	}
+}
+
+// handlePublishContent 处理发布内容
+func (s *AppServer) handlePublishContent(ctx context.Context, args map[string]interface{}) *MCPToolResult {
+	logrus.Info("MCP: 发布内容")
+
+	// 解析参数
+	title, _ := args["title"].(string)
+	content, _ := args["content"].(string)
+	imagePathsInterface, _ := args["images"].([]interface{})
+
+	var imagePaths []string
+	for _, path := range imagePathsInterface {
+		if pathStr, ok := path.(string); ok {
+			imagePaths = append(imagePaths, pathStr)
+		}
+	}
+
+	logrus.Infof("MCP: 发布内容 - 标题: %s, 图片数量: %d", title, len(imagePaths))
+
+	// 构建发布请求
+	req := &PublishRequest{
+		Title:   title,
+		Content: content,
+		Images:  imagePaths,
+	}
+
+	// 执行发布
+	result, err := s.xiaohongshuService.PublishContent(ctx, req)
+	if err != nil {
+		return &MCPToolResult{
+			Content: []MCPContent{{
+				Type: "text",
+				Text: "发布失败: " + err.Error(),
+			}},
+			IsError: true,
+		}
+	}
+
+	resultText := fmt.Sprintf("内容发布成功: %+v", result)
+	return &MCPToolResult{
+		Content: []MCPContent{{
+			Type: "text",
+			Text: resultText,
+		}},
+	}
+}
+
+// handleListFeeds 处理获取Feeds列表
+func (s *AppServer) handleListFeeds(ctx context.Context) *MCPToolResult {
+	logrus.Info("MCP: 获取Feeds列表")
+
+	result, err := s.xiaohongshuService.ListFeeds(ctx)
+	if err != nil {
+		return &MCPToolResult{
+			Content: []MCPContent{{
+				Type: "text",
+				Text: "获取Feeds列表失败: " + err.Error(),
+			}},
+			IsError: true,
+		}
+	}
+
+	// 格式化输出，转换为JSON字符串
+	jsonData, err := json.MarshalIndent(result, "", "  ")
+	if err != nil {
+		return &MCPToolResult{
+			Content: []MCPContent{{
+				Type: "text",
+				Text: fmt.Sprintf("获取Feeds列表成功，但序列化失败: %v", err),
+			}},
+			IsError: true,
+		}
+	}
+
+	return &MCPToolResult{
+		Content: []MCPContent{{
+			Type: "text",
+			Text: string(jsonData),
+		}},
+	}
+}
+
+// handleSearchFeeds 处理搜索Feeds
+func (s *AppServer) handleSearchFeeds(ctx context.Context, args map[string]interface{}) *MCPToolResult {
+	logrus.Info("MCP: 搜索Feeds")
+
+	// 解析参数
+	keyword, ok := args["keyword"].(string)
+	if !ok || keyword == "" {
+		return &MCPToolResult{
+			Content: []MCPContent{{
+				Type: "text",
+				Text: "搜索Feeds失败: 缺少关键词参数",
+			}},
+			IsError: true,
+		}
+	}
+
+	logrus.Infof("MCP: 搜索Feeds - 关键词: %s", keyword)
+
+	result, err := s.xiaohongshuService.SearchFeeds(ctx, keyword)
+	if err != nil {
+		return &MCPToolResult{
+			Content: []MCPContent{{
+				Type: "text",
+				Text: "搜索Feeds失败: " + err.Error(),
+			}},
+			IsError: true,
+		}
+	}
+
+	// 格式化输出，转换为JSON字符串
+	jsonData, err := json.MarshalIndent(result, "", "  ")
+	if err != nil {
+		return &MCPToolResult{
+			Content: []MCPContent{{
+				Type: "text",
+				Text: fmt.Sprintf("搜索Feeds成功，但序列化失败: %v", err),
+			}},
+			IsError: true,
+		}
+	}
+
+	return &MCPToolResult{
+		Content: []MCPContent{{
+			Type: "text",
+			Text: string(jsonData),
+		}},
+	}
+}