✨ feat(api): 新增榜单书架历史与搜索续传并重构正文缓存链路

- 新增 /rank 免签名榜单接口（多域名容错）、/bookshelf 与 /read-history（sessionid 登录态，书架支持分组过滤）
- 搜索重写：翻页透传上游 passback/search_id/next_offset/corrected_query 并按 book_id 去重，15~20 位纯数字关键词直查详情（ID 直搜）
- 删除 /login/check 登录校验端点（login.go、路由与文档同步移除，sessionid 说明改为直接供书架/历史使用）
- 正文链路重构：singleflight 合并同章节并发回源防击穿，缓存与解析解耦统一在出口处理，decodeContentBody 按 crypt_status 分支并兜底 500003 明文
- 缓存层：SQL 持久层 TTL 与业务 TTL 解耦（不可变内容过期后由 SQL 回填），动态短缓存只走 Redis，withCache 合并并发 miss
- 密钥池：KeyTs 随正文请求上传降低密钥不匹配重试，密钥超 24 小时异步刷新并防刷新风暴，last_used_at 批量落库
- 签名补 X-Helios（与 X-Ladon 同值，对齐书源实现）；设备注册版本号统一走 ClientVersionCode/Name
- 分类 landing 透传新版标签 selected_items；multi-detail 批量详情供书架/历史复用
- README 与 openapi.yaml 补充新接口文档

internal/fqapi/category_landing.go

@@ -8,32 +8,54 @@ import (
 var categoryLandingLogger = common.NewLogger("category_landing", "INFO", "")
 
 // HandleCategoryLanding 处理获取分类详情,分类详情短缓存 10 分钟
-func HandleCategoryLanding(categoryID, offset, wordNumber, bookStatus, sortBy interface{}) (string, error) {
-	return withCache(fmt.Sprintf("category_landing_%v_%v_%v_%v_%v", categoryID, offset, wordNumber, bookStatus, sortBy), 600, func() (string, error) {
-		return fetchCategoryLanding(categoryID, offset, wordNumber, bookStatus, sortBy)
+// selectedItems：新版分类标签自带的筛选项（selected_items，透传上游）
+func HandleCategoryLanding(categoryID, offset, wordNumber, bookStatus, sortBy, selectedItems interface{}) (string, error) {
+	return withCache(fmt.Sprintf("category_landing_%v_%v_%v_%v_%v_%v", categoryID, offset, wordNumber, bookStatus, sortBy, selectedItems), 600, func() (string, error) {
+		return fetchCategoryLanding(categoryID, offset, wordNumber, bookStatus, sortBy, selectedItems)
 	})
 }
 
-func fetchCategoryLanding(categoryID, offset, wordNumber, bookStatus, sortBy interface{}) (string, error) {
+func fetchCategoryLanding(categoryID, offset, wordNumber, bookStatus, sortBy, selectedItems interface{}) (string, error) {
 	// 参数转换
 	categoryIDInt := ParseIntParam(categoryID, 0)
 	offsetInt := ParseIntParam(offset, 0)
 	wordNumberInt := ParseIntParam(wordNumber, 0)
 	bookStatusInt := ParseIntParam(bookStatus, 0)
 	sortByInt := ParseIntParam(sortBy, 0)
+	selectedItemsStr := ParseStringParam(selectedItems, "")
 
-	if categoryIDInt == 0 {
+	if categoryIDInt == 0 && selectedItemsStr == "" {
 		return BuildErrorResponseWithCode(100144, "参数错误"), nil
 	}
 
+	params := []string{
+		fmt.Sprintf("limit=%d", 20),
+		fmt.Sprintf("offset=%d", offsetInt),
+	}
+	if categoryIDInt != 0 {
+		params = append(params, fmt.Sprintf("category_id=%d", categoryIDInt))
+	}
+	if wordNumberInt != 0 {
+		params = append(params, fmt.Sprintf("word_number=%d", wordNumberInt))
+	}
+	if bookStatusInt != 0 {
+		params = append(params, fmt.Sprintf("book_status=%d", bookStatusInt))
+	}
+	if sortByInt != 0 {
+		params = append(params, fmt.Sprintf("sort_by=%d", sortByInt))
+	}
+	// 新版分类标签：selected_items 由 front 页标签自带，需与其 from_front_page 配对透传
+	if selectedItemsStr != "" {
+		params = append(params,
+			"selected_items="+selectedItemsStr,
+			"selected_item_from_front_page="+selectedItemsStr,
+			"source=front_category",
+		)
+	}
+
 	reqURL := BuildURL(
 		"https://reading.snssdk.com/reading/bookapi/new_category/landing/v/",
-		fmt.Sprintf("category_id=%d", categoryIDInt),
-		fmt.Sprintf("limit=%d", 20),
-		fmt.Sprintf("offset=%d", offsetInt),
-		fmt.Sprintf("word_number=%d", wordNumberInt),
-		fmt.Sprintf("book_status=%d", bookStatusInt),
-		fmt.Sprintf("sort_by=%d", sortByInt),
+		params...,
 	)
 
 	resp, err := GorgonRequest(reqURL, map[string]interface{}{