diff --git a/src/modules/cards/application/useCases/commands/AddUrlToLibraryUseCase.ts b/src/modules/cards/application/useCases/commands/AddUrlToLibraryUseCase.ts
index c223941f..54cab9e3 100644
--- a/src/modules/cards/application/useCases/commands/AddUrlToLibraryUseCase.ts
+++ b/src/modules/cards/application/useCases/commands/AddUrlToLibraryUseCase.ts
@@ -39,7 +39,10 @@ export class ValidationError extends UseCaseError {
 
 export class AddUrlToLibraryUseCase extends BaseUseCase<
   AddUrlToLibraryDTO,
-  Result<AddUrlToLibraryResponseDTO, ValidationError | AuthenticationError | AppError.UnexpectedError>
+  Result<
+    AddUrlToLibraryResponseDTO,
+    ValidationError | AuthenticationError | AppError.UnexpectedError
+  >
 > {
   constructor(
     private cardRepository: ICardRepository,
@@ -216,7 +219,9 @@ export class AddUrlToLibraryUseCase extends BaseUseCase<
             await this.cardLibraryService.addCardToLibrary(noteCard, curatorId);
           if (addNoteCardToLibraryResult.isErr()) {
             // Propagate authentication errors
-            if (addNoteCardToLibraryResult.error instanceof AuthenticationError) {
+            if (
+              addNoteCardToLibraryResult.error instanceof AuthenticationError
+            ) {
               return err(addNoteCardToLibraryResult.error);
             }
             if (
diff --git a/src/modules/cards/application/useCases/commands/UpdateUrlCardAssociationsUseCase.ts b/src/modules/cards/application/useCases/commands/UpdateUrlCardAssociationsUseCase.ts
index 65c6955e..f098c06e 100644
--- a/src/modules/cards/application/useCases/commands/UpdateUrlCardAssociationsUseCase.ts
+++ b/src/modules/cards/application/useCases/commands/UpdateUrlCardAssociationsUseCase.ts
@@ -192,7 +192,9 @@ export class UpdateUrlCardAssociationsUseCase extends BaseUseCase<
             await this.cardLibraryService.addCardToLibrary(noteCard, curatorId);
           if (addNoteCardToLibraryResult.isErr()) {
             // Propagate authentication errors
-            if (addNoteCardToLibraryResult.error instanceof AuthenticationError) {
+            if (
+              addNoteCardToLibraryResult.error instanceof AuthenticationError
+            ) {
               return err(addNoteCardToLibraryResult.error);
             }
             if (
@@ -292,7 +294,9 @@ export class UpdateUrlCardAssociationsUseCase extends BaseUseCase<
           );
         if (removeFromCollectionsResult.isErr()) {
           // Propagate authentication errors
-          if (removeFromCollectionsResult.error instanceof AuthenticationError) {
+          if (
+            removeFromCollectionsResult.error instanceof AuthenticationError
+          ) {
             return err(removeFromCollectionsResult.error);
           }
           if (
diff --git a/src/modules/cards/domain/services/CardCollectionService.ts b/src/modules/cards/domain/services/CardCollectionService.ts
index 2398f4c8..cdd6af3b 100644
--- a/src/modules/cards/domain/services/CardCollectionService.ts
+++ b/src/modules/cards/domain/services/CardCollectionService.ts
@@ -27,7 +27,12 @@ export class CardCollectionService implements DomainService {
     collectionId: CollectionId,
     curatorId: CuratorId,
   ): Promise<
-    Result<Collection, CardCollectionValidationError | AuthenticationError | AppError.UnexpectedError>
+    Result<
+      Collection,
+      | CardCollectionValidationError
+      | AuthenticationError
+      | AppError.UnexpectedError
+    >
   > {
     try {
       // Find the collection
@@ -98,7 +103,9 @@ export class CardCollectionService implements DomainService {
   ): Promise<
     Result<
       Collection[],
-      CardCollectionValidationError | AuthenticationError | AppError.UnexpectedError
+      | CardCollectionValidationError
+      | AuthenticationError
+      | AppError.UnexpectedError
     >
   > {
     const updatedCollections: Collection[] = [];
@@ -124,7 +131,9 @@ export class CardCollectionService implements DomainService {
   ): Promise<
     Result<
       Collection | null,
-      CardCollectionValidationError | AuthenticationError | AppError.UnexpectedError
+      | CardCollectionValidationError
+      | AuthenticationError
+      | AppError.UnexpectedError
     >
   > {
     try {
@@ -202,7 +211,9 @@ export class CardCollectionService implements DomainService {
   ): Promise<
     Result<
       Collection[],
-      CardCollectionValidationError | AuthenticationError | AppError.UnexpectedError
+      | CardCollectionValidationError
+      | AuthenticationError
+      | AppError.UnexpectedError
     >
   > {
     const updatedCollections: Collection[] = [];
diff --git a/src/modules/cards/domain/services/CardLibraryService.ts b/src/modules/cards/domain/services/CardLibraryService.ts
index 270897f5..c4d0701f 100644
--- a/src/modules/cards/domain/services/CardLibraryService.ts
+++ b/src/modules/cards/domain/services/CardLibraryService.ts
@@ -29,7 +29,12 @@ export class CardLibraryService implements DomainService {
     card: Card,
     curatorId: CuratorId,
   ): Promise<
-    Result<Card, CardLibraryValidationError | AuthenticationError | AppError.UnexpectedError>
+    Result<
+      Card,
+      | CardLibraryValidationError
+      | AuthenticationError
+      | AppError.UnexpectedError
+    >
   > {
     try {
       // Check if card is already in curator's library
@@ -117,7 +122,12 @@ export class CardLibraryService implements DomainService {
     card: Card,
     curatorId: CuratorId,
   ): Promise<
-    Result<Card, CardLibraryValidationError | AuthenticationError | AppError.UnexpectedError>
+    Result<
+      Card,
+      | CardLibraryValidationError
+      | AuthenticationError
+      | AppError.UnexpectedError
+    >
   > {
     try {
       // Check if card is in curator's library