Add activity priority desk filter and keep detail browsing inside the same column after stage changes.

When done/reopen/stage moves leave a column, advance to the next activity there or return to the list if empty.

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/api/src/activities/dto.ts

@@ -93,6 +93,11 @@ export class ListActivitiesQueryDto {
   @IsString()
   typeDefId?: string;
 
+  /** اولویت فعالیت (کلید ثابت؛ برچسب در تنظیمات سازمان) */
+  @IsOptional()
+  @IsIn(ACTIVITY_PRIORITIES)
+  priority?: (typeof ACTIVITY_PRIORITIES)[number];
+
   /** شناسهٔ مرحله یا 'all' — حالت تب/کانبان مراحل */
   @IsOptional()
   @IsString()