refactor: improve search user collections logic to handle optional keyword

server/api/collection.go

@@ -195,9 +195,9 @@ func handleRemoveResourceFromCollection(c fiber.Ctx) error {
 
 func handleSearchUserCollections(c fiber.Ctx) error {
 	keyword := c.Query("keyword", "")
-	if keyword == "" {
-		return model.NewRequestError("keyword is required")
-	}
+	// if keyword == "" {
+	// 	return model.NewRequestError("keyword is required")
+	// }
 	username := c.Query("username", "")
 	if username == "" {
 		return model.NewRequestError("username is required")

server/dao/collection.go

@@ -181,7 +181,11 @@ func SearchUserCollections(uid uint, keyword string, excludedRID uint) ([]*model
 	var collections []*model.Collection
 
 	query := db.Model(&model.Collection{}).
-		Where("user_id = ? AND title LIKE ?", uid, "%"+keyword+"%")
+		Where("user_id = ?", uid)
+
+	if keyword != "" {
+		query = query.Where("title LIKE ?", "%"+keyword+"%")
+	}
 
 	if excludedRID > 0 {
 		// Use LEFT JOIN with IS NULL for better performance

server/service/collection.go

@@ -136,7 +136,7 @@ func ListCollectionResources(collectionID uint, page int) ([]*model.ResourceView
 // Search user collections by keyword, limited to 10 results.
 // excludedRID: if >0, only return collections not containing this resource.
 func SearchUserCollections(username string, keyword string, excludedRID uint) ([]*model.CollectionView, error) {
-	if username == "" || keyword == "" {
+	if username == "" {
 		return nil, errors.New("invalid parameters")
 	}
 	user, err := dao.GetUserByUsername(username)