新增首页 AW炫彩回收入口，支持后台配置展示图

首页第三入口点击查看回收说明图；配置项 mobile.aw_recycle 可配标题/图片；aw-recycle 走公开文件链路，首页鉴权预览兼容旧私有地址。

backend/internal/modules/systemconfig/aw_recycle.go

@@ -0,0 +1,43 @@
+package systemconfig
+
+import (
+	"encoding/json"
+	"strings"
+)
+
+const awRecycleConfigKey = "mobile.aw_recycle"
+
+func defaultAWRecycle() AWRecycleConfig {
+	return AWRecycleConfig{
+		Title:    "AW炫彩回收",
+		Subtitle: "点击查看回收说明",
+		ImageURL: "",
+		Enabled:  true,
+	}
+}
+
+func defaultAWRecycleConfigValue() string {
+	raw, err := json.Marshal(defaultAWRecycle())
+	if err != nil {
+		return `{"title":"AW炫彩回收","subtitle":"点击查看回收说明","image_url":"","enabled":true}`
+	}
+	return string(raw)
+}
+
+func normalizeAWRecycle(item AWRecycleConfig) AWRecycleConfig {
+	def := defaultAWRecycle()
+	title := strings.TrimSpace(item.Title)
+	if title == "" {
+		title = def.Title
+	}
+	subtitle := strings.TrimSpace(item.Subtitle)
+	if subtitle == "" {
+		subtitle = def.Subtitle
+	}
+	return AWRecycleConfig{
+		Title:    title,
+		Subtitle: subtitle,
+		ImageURL: strings.TrimSpace(item.ImageURL),
+		Enabled:  item.Enabled,
+	}
+}

backend/internal/modules/systemconfig/dto.go

@@ -25,6 +25,15 @@ type HomeConfigDTO struct {
 	Announcements  []string          `json:"announcements"`
 	Banners        []HomeBannerItem  `json:"banners"`
 	PublishOptions PublishOptionsDTO `json:"publish_options"`
+	AWRecycle      AWRecycleConfig   `json:"aw_recycle"`
+}
+
+// AWRecycleConfig 首页「AW炫彩回收」入口：点击展示可配置图片。
+type AWRecycleConfig struct {
+	Title    string `json:"title"`
+	Subtitle string `json:"subtitle"`
+	ImageURL string `json:"image_url"`
+	Enabled  bool   `json:"enabled"`
 }
 
 type OrderAgreementsDTO struct {

backend/internal/modules/systemconfig/repository.go

@@ -45,6 +45,7 @@ var defaultConfigs = []defaultConfig{
 	{Key: "integration.paddle_ocr_model", Value: "PaddleOCR-VL-1.6", Description: "PaddleOCR 识别模型"},
 	{Key: homeAnnouncementsConfigKey, Value: defaultHomeAnnouncementsConfigValue(), Description: "移动端首页公告 JSON 数组"},
 	{Key: homeBannersConfigKey, Value: defaultHomeBannersConfigValue(), Description: "移动端首页轮播图 JSON 数组"},
+	{Key: awRecycleConfigKey, Value: defaultAWRecycleConfigValue(), Description: "首页 AW炫彩回收入口配置 JSON（标题/副标题/展示图片）"},
 	{Key: publishOptionsConfigKey, Value: defaultPublishOptionsConfigValue(), Description: "发布页选项配置 JSON"},
 	{Key: salePriceConfigKey, Value: defaultSalePriceConfigValue(), Description: "内部出售定价规则 JSON"},
 }
@@ -67,6 +68,7 @@ var adminVisibleConfigKeys = []string{
 	"listing.sale_price_config",
 	"mobile.home_announcements",
 	"mobile.home_banners",
+	"mobile.aw_recycle",
 	"order.agreements",
 	"order.pending_payment_timeout_minutes",
 	"order.return_overdue_grace_minutes",

backend/internal/modules/systemconfig/service_home.go

@@ -28,6 +28,10 @@ func (s *Service) HomeConfig(ctx context.Context) (*HomeConfigDTO, error) {
 	if err != nil {
 		return nil, err
 	}
+	awRecycle, err := s.awRecycle(ctx)
+	if err != nil {
+		return nil, err
+	}
 	publishOptions, err := s.publishOptions(ctx)
 	if err != nil {
 		return nil, err
@@ -36,6 +40,7 @@ func (s *Service) HomeConfig(ctx context.Context) (*HomeConfigDTO, error) {
 		Announcements:  announcements,
 		Banners:        banners,
 		PublishOptions: publishOptions,
+		AWRecycle:      awRecycle,
 	}, nil
 }
 
@@ -62,3 +67,15 @@ func (s *Service) homeBanners(ctx context.Context) ([]HomeBannerItem, error) {
 	}
 	return normalizeHomeBanners(items), nil
 }
+
+func (s *Service) awRecycle(ctx context.Context) (AWRecycleConfig, error) {
+	value, err := s.repo.FindValue(ctx, awRecycleConfigKey)
+	if err != nil {
+		return defaultAWRecycle(), err
+	}
+	item := defaultAWRecycle()
+	if err := json.Unmarshal([]byte(value), &item); err != nil {
+		item = defaultAWRecycle()
+	}
+	return normalizeAWRecycle(item), nil
+}