feat: unify owned and competitor work analysis

internal/creator/growth.go

@@ -127,8 +127,7 @@ func (s *Store) LoadWorksGrowth(ctx context.Context, workIDs []string, filter Wo
 	return result, nil
 }
 
-// ApplyWorkGrowthFilter 为作品列表附加增速并按条件过滤、排序（增速降序）。
-// 只有设置了 MinLikes 才改变排序；否则保持原顺序仅附加增速。
+// ApplyWorkGrowthFilter 为作品列表附加增量并按条件过滤，不改变显式选择的顺序。
 func ApplyWorkGrowthFilter(works []Work, growth map[string]WorkGrowth, filter WorkGrowthFilter) ([]Work, error) {
 	filter, err := normalizeGrowthFilter(filter)
 	if err != nil {
@@ -147,16 +146,20 @@ func ApplyWorkGrowthFilter(works []Work, growth map[string]WorkGrowth, filter Wo
 		}
 		result = append(result, work)
 	}
-	if filter.MinLikes != nil {
-		sort.SliceStable(result, func(i, j int) bool {
-			gi, gj := result[i].LikesGrowth, result[j].LikesGrowth
-			if gi == nil || gj == nil {
-				return gj == nil && gi != nil
-			}
-			return *gi > *gj
-		})
-	}
 	return result, nil
 }
 
+func sortWorksGrowth(works []Work, order string) {
+	sort.SliceStable(works, func(i, j int) bool {
+		left, right := works[i].LikesGrowth, works[j].LikesGrowth
+		if left == nil || right == nil {
+			return left != nil && right == nil
+		}
+		if order == "asc" {
+			return *left < *right
+		}
+		return *left > *right
+	})
+}
+
 func int64Ptr(value int64) *int64 { return &value }