feat: quick polls in comments that end in a decision

«📊 Añadir una encuesta» adds 2 to 6 options to a new comment. Members,
viewers too, vote by clicking an option (one vote each, which they can
change or take back) and see each option's votes as a bar. Whoever
started it, or an admin, closes it with «Cerrar y decidir»: the most
voted wins (none on a tie) and a «Decidido: …» reply marked as a
decision shows above the ticket. Events of the comment (voted, closed).

API: addComment(…, poll), votePoll, closePoll, Comment.poll;
POST /api/comments/{id}/poll/vote and …/poll/close. MCP: add_comment
poll, vote_poll, close_poll.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

libs/api/tracker/presenters/src/lib/http/comments.controller.ts

@@ -19,8 +19,10 @@ import { CommentsService } from '@task-stream/api/tracker/application';
 import { REACTIONS } from '@task-stream/api/tracker/domain';
 import {
   CommentBodyDto,
+  ClosePollDto,
   ReactToCommentDto,
   ResolveThreadDto,
+  VotePollDto,
 } from './dto/requests.dto';
 import { CommandResultDto } from './dto/responses.dto';
 
@@ -82,6 +84,39 @@ export class CommentsController {
     return this.comments.markDecision(me.id, commentId, false);
   }
 
+  @Post(':commentId/poll/vote')
+  @HttpCode(200)
+  @ApiOperation({
+    summary: "Vote in a comment's poll (members, viewers too)",
+    description: 'option: its index; null takes the vote back.',
+  })
+  @ApiOkResponse({ type: CommandResultDto })
+  @ApiCommandErrors()
+  votePoll(
+    @CurrentUser() me: User,
+    @Param('commentId') commentId: string,
+    @Body() body: VotePollDto,
+  ) {
+    return this.comments.votePoll(me.id, commentId, body.option);
+  }
+
+  @Post(':commentId/poll/close')
+  @HttpCode(200)
+  @ApiOperation({
+    summary: 'Close a poll (whoever started it, or an admin)',
+    description:
+      'With decide (default), the winner stays as a decision of the ticket.',
+  })
+  @ApiOkResponse({ type: CommandResultDto })
+  @ApiCommandErrors()
+  closePoll(
+    @CurrentUser() me: User,
+    @Param('commentId') commentId: string,
+    @Body() body: ClosePollDto,
+  ) {
+    return this.comments.closePoll(me.id, commentId, body.decide ?? true);
+  }
+
   @Put(':commentId/resolution')
   @ApiOperation({
     summary: 'Settle a conversation (a top-level comment and its replies)',

libs/api/tracker/presenters/src/lib/http/dto/requests.dto.ts

@@ -1316,6 +1316,40 @@ export class AddCommentDto extends CommentBodyDto {
   @IsOptional()
   @IsUUID()
   replyTo?: string;
+
+  @ApiPropertyOptional({
+    type: [String],
+    description: 'A quick poll: 2 to 6 options',
+    example: ['Stripe', 'Redsys'],
+  })
+  @IsOptional()
+  @IsArray()
+  @ArrayMaxSize(6)
+  @IsString({ each: true })
+  @MaxLength(80, { each: true })
+  poll?: string[];
+}
+
+export class VotePollDto {
+  @ApiProperty({
+    type: Number,
+    nullable: true,
+    description: 'Option index; null takes the vote back',
+  })
+  @ValidateIf((dto: VotePollDto) => dto.option !== null)
+  @IsInt()
+  @Min(0)
+  option!: number | null;
+}
+
+export class ClosePollDto {
+  @ApiPropertyOptional({
+    default: true,
+    description: 'Keep the winner as a decision of the ticket',
+  })
+  @IsOptional()
+  @IsBoolean()
+  decide?: boolean;
 }
 
 export class ReactToCommentDto {

libs/api/tracker/presenters/src/lib/http/dto/responses.dto.ts

@@ -612,6 +612,22 @@ export class CommentReactionDto {
   @ApiProperty({ type: [UserRefDto] }) users!: UserRefDto[];
 }
 
+export class PollOptionDto {
+  @ApiProperty() text!: string;
+  @ApiProperty({ type: [UserRefDto] }) voters!: UserRefDto[];
+}
+
+export class CommentPollDto {
+  @ApiProperty({ type: [PollOptionDto] }) options!: PollOptionDto[];
+  @ApiProperty() closed!: boolean;
+  @ApiProperty({
+    type: Number,
+    nullable: true,
+    description: 'Index of the winning option once closed (null on a tie)',
+  })
+  winner!: number | null;
+}
+
 export class CommentDto {
   @ApiProperty({ format: 'uuid' }) id!: string;
   @ApiProperty({ format: 'uuid' }) issueId!: string;
@@ -648,6 +664,8 @@ export class CommentDto {
   decidedBy!: UserRefDto | null;
   @ApiProperty({ type: String, nullable: true, format: 'date-time' })
   decidedAt!: string | null;
+  @ApiProperty({ type: CommentPollDto, nullable: true })
+  poll!: CommentPollDto | null;
   @ApiProperty({
     description:
       'A conversation (top-level comment and its replies) that was settled',

libs/api/tracker/presenters/src/lib/http/issues.controller.ts

@@ -990,6 +990,7 @@ export class IssuesController {
       await this.refs.issueId(me.id, issue),
       body.body,
       body.replyTo ?? null,
+      body.poll ?? null,
     );
   }