feat(listings): 排序交互升级为双向翻转并对齐双端体验

- PC端交互：HomeView 排序按钮支持点击切换升降序翻转（比例、哈夫币、AWM数量、合并价格为单个价格项），并带有高低方向箭头（▲/▼）高亮指示
- 移动端交互：MobileHomeView 菜单提供清晰的双向文案（如「比例从高到低 / 比例从低到高」），且点击当前选中项时支持自动翻转方向，顶部工具栏标题紧凑对齐
- 后端排序：public_filter 与 public_query 完整支持 ratioDesc/ratioAsc、priceAsc/priceDesc、coinDesc/coinAsc、awmDesc/awmAsc
- 验证方式：新增并运行 TestSortPublicListingsByRatio 包含升序/降序多断言，全量运行 ./scripts/check.sh 门禁全绿通过

backend/internal/modules/listing/public_filter.go

@@ -103,6 +103,8 @@ func sortPublicListings(items []ListingDTO, sortKey string) {
 			return a.PriceCent > b.PriceCent
 		case "coinDesc":
 			return a.HafCoinAmount > b.HafCoinAmount
+		case "coinAsc":
+			return a.HafCoinAmount < b.HafCoinAmount
 		case "ratioDesc", "ratio":
 			aRatio := ratioFromListing(a)
 			bRatio := ratioFromListing(b)
@@ -124,6 +126,13 @@ func sortPublicListings(items []ListingDTO, sortKey string) {
 				return aAmmo > bAmmo
 			}
 			return a.HafCoinAmount > b.HafCoinAmount
+		case "awmAsc":
+			aAmmo := resourceQuantity(a.AssetSummary, "awmAmmo")
+			bAmmo := resourceQuantity(b.AssetSummary, "awmAmmo")
+			if aAmmo != bAmmo {
+				return aAmmo < bAmmo
+			}
+			return a.HafCoinAmount < b.HafCoinAmount
 		case "published":
 			return publicRecentLess(a, b)
 		case "recommended", "comprehensive", "":

backend/internal/modules/listing/public_filter_test.go

@@ -208,13 +208,25 @@ func TestSortPublicListingsByRatio(t *testing.T) {
 
 	sortPublicListings(items, "ratioDesc")
 
-	// 预期顺序：ID=2 (45.0) > ID=4 (35.0, 100M 币更多) > ID=3 (35.0, 80M) > ID=1 (20.0)
+	// 预期降序：ID=2 (45.0) > ID=4 (35.0, 100M 币更多) > ID=3 (35.0, 80M) > ID=1 (20.0)
 	expectedIDs := []uint64{2, 4, 3, 1}
 	for i, expected := range expectedIDs {
 		if items[i].ID != expected {
 			t.Fatalf("at index %d, expected listing %d, got %d (ratio=%.1f)", i, expected, items[i].ID, ratioFromListing(items[i]))
 		}
 	}
+
+	sortPublicListings(items, "ratioAsc")
+
+	// 预期升序：ID=1 (20.0) < ID=3 (35.0) < ID=4 (35.0) < ID=2 (45.0)
+	if items[0].ID != 1 || items[len(items)-1].ID != 2 {
+		t.Fatalf("expected ratioAsc items[0].ID=1 and items[last].ID=2, got order: %v", []uint64{items[0].ID, items[1].ID, items[2].ID, items[3].ID})
+	}
+
+	sortPublicListings(items, "coinAsc")
+	if items[0].HafCoinAmount > items[len(items)-1].HafCoinAmount {
+		t.Fatalf("expected coinAsc first item coin <= last item coin")
+	}
 }
 
 func TestIsNightAvailableSummaryUsesEarlyMorningResponse(t *testing.T) {

backend/internal/modules/listing/public_query.go

@@ -146,7 +146,7 @@ func canListPublicWithSQL(query PublicListQuery) bool {
 		return false
 	}
 	switch query.Sort {
-	case "", "published", "recommended", "comprehensive", "priceAsc", "priceDesc", "coinDesc":
+	case "", "published", "recommended", "comprehensive", "priceAsc", "priceDesc", "coinDesc", "coinAsc":
 		return true
 	default:
 		return false
@@ -161,6 +161,8 @@ func applyPublicSQLSort(db *gorm.DB, sortKey string) *gorm.DB {
 		return db.Order("l.price_cent DESC, l.published_at DESC, l.id DESC")
 	case "coinDesc":
 		return db.Order("a.haf_coin_amount DESC, l.published_at DESC, l.id DESC")
+	case "coinAsc":
+		return db.Order("a.haf_coin_amount ASC, l.published_at DESC, l.id DESC")
 	case "published":
 		return db.Order("l.published_at DESC, l.id DESC")
 	default: