improvement: task assignment flow added. cases and tasks feature updated accordingly.

backend/src/modules/tasks/dto/tasks.dto.ts

@@ -81,6 +81,12 @@ export class ListLabTasksDto {
   @IsUUID()
   labCaseId?: string;
 
+  /** When true, only tasks assigned to the current user. */
+  @IsOptional()
+  @Transform(toBoolean)
+  @IsBoolean()
+  assignedToMe?: boolean;
+
   @IsOptional()
   @IsIn(['date', 'status', 'clinic', 'patient', 'important', 'prosthesis', 'taskType'])
   sortBy?: TaskSortField;
@@ -147,6 +153,12 @@ export class LocateTaskPageDto {
   @IsString()
   stepCompleted?: string;
 
+  /** When true, only tasks assigned to the current user. */
+  @IsOptional()
+  @Transform(toBoolean)
+  @IsBoolean()
+  assignedToMe?: boolean;
+
   @IsOptional()
   @IsIn(['date', 'status', 'clinic', 'patient', 'important', 'prosthesis', 'taskType'])
   sortBy?: TaskSortField;