feat(feeds): Enhance search functionality with additional filter options

- Added support for sorting, note type, time range, search scope, and location distance in the search feeds functionality.
- Updated SearchFeedsArgs struct to include new parameters for filtering.
- Modified handleSearchFeeds method to process and apply filters during feed search.
- Improved logging to include the number of applied filters.

types.go

@@ -1,5 +1,7 @@
 package main
 
+import "github.com/xpzouying/xiaohongshu-mcp/xiaohongshu"
+
 // HTTP API 响应类型
 
 // ErrorResponse 错误响应
@@ -38,6 +40,11 @@ type FeedDetailRequest struct {
 	XsecToken string `json:"xsec_token" binding:"required"`
 }
 
+type SearchFeedsRequest struct {
+	Keyword string                   `json:"keyword" binding:"required"`
+	Filters xiaohongshu.FilterOption `json:"filters,omitempty"`
+}
+
 // FeedDetailResponse Feed详情响应
 type FeedDetailResponse struct {
 	FeedID string `json:"feed_id"`