feat(activities): editable stages with tab and kanban views

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

apps/api/src/activities/dto.ts

@@ -66,6 +66,11 @@ export class ListActivitiesQueryDto {
   @IsString()
   assigneeId?: string;
 
+  /** شناسهٔ مرحله یا 'all' — حالت تب/کانبان مراحل */
+  @IsOptional()
+  @IsString()
+  stageId?: string;
+
   @IsOptional()
   @IsString()
   personId?: string;
@@ -102,12 +107,61 @@ export class ListActivitiesQueryDto {
   limit?: number = 50;
 }
 
+const STAGE_COLORS = ['green', 'orange', 'purple', 'blue', 'rose', 'slate'] as const;
+
+export class CreateActivityStageDto {
+  @IsString()
+  @MinLength(1)
+  @MaxLength(80)
+  name!: string;
+
+  @IsOptional()
+  @IsIn(STAGE_COLORS)
+  color?: (typeof STAGE_COLORS)[number];
+
+  @IsOptional()
+  @IsIn(ACTIVITY_STATUSES)
+  kind?: (typeof ACTIVITY_STATUSES)[number];
+}
+
+export class UpdateActivityStageDto {
+  @IsOptional()
+  @IsString()
+  @MinLength(1)
+  @MaxLength(80)
+  name?: string;
+
+  @IsOptional()
+  @IsIn(STAGE_COLORS)
+  color?: (typeof STAGE_COLORS)[number];
+
+  @IsOptional()
+  @IsIn(ACTIVITY_STATUSES)
+  kind?: (typeof ACTIVITY_STATUSES)[number];
+}
+
+export class ReorderActivityStagesDto {
+  @IsArray()
+  @IsString({ each: true })
+  stageIds!: string[];
+}
+
+export class MoveActivityStageDto {
+  @IsString()
+  stageId!: string;
+}
+
 export class CreateActivityDto {
   @IsString()
   @MinLength(2)
   @MaxLength(200)
   title!: string;
 
+  @IsOptional()
+  @ValidateIf((_, v) => v !== '' && v != null)
+  @IsString()
+  stageId?: string | null;
+
   @IsOptional()
   @IsIn(ACTIVITY_TYPES)
   type?: (typeof ACTIVITY_TYPES)[number];