feat: formatted text, a list view, ticket details, public proposals and votes

Formatted text
- Descriptions, comments, replies and release notes render Markdown,
  sanitised with DOMPurify (tested against scripts, handlers and
  javascript: links). A pasted image is uploaded and written as
  ![name](attachment:<id>); the web fetches it with the reader's session,
  so it works on private projects. Every text box has a preview. The
  attachment upload now answers its attachmentId.

List view
- /p/:key/list: every ticket as rows, sortable by any column, filtered by
  text, open/closed, type, priority and assignee; status, priority and
  assignee change in place; bulk edit (the backlog's bar, now shared).

Ticket details
- Reactions on comments (GitHub's eight), for members and viewers.
- Duplicate a ticket: what it says, not where it stands.
- blockedBy: open tickets it waits for (BLOCKS / DEPENDS_ON), worked out
  when reading with one query per board or page; shown on cards, list
  rows and the ticket.

Public proposals
- A public project can take bug reports and ideas from anyone
  (acceptsProposals): POST /api/explore/projects/{project}/proposals and
  the form at /p/:key/proponer. They become tickets labelled «propuesta»,
  opened by TaskStream; a honeypot field and 5 per address every 15
  minutes keep spam out. No e-mail is asked: it would be public.

Votes
- Anyone signed in votes on a public project's tickets, members on a
  private one (voteIssue, PUT/DELETE /api/issues/{issue}/vote): votes and
  voted on each ticket, buttons on the ticket and the roadmap, a column
  in the list. The showcase carries votes and the open proposals.

MCP: vote_issue, duplicate_issue, react_to_comment; listings show
blockers and votes. Docs, Word and PDF updated; chat notifications
(Discord, Slack, Telegram) noted for later.

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

libs/api/tracker/application/src/lib/queries/get-showcase.query.ts

@@ -6,6 +6,8 @@ import { FindProjectsRepository } from '../ports/find-projects.repository';
 import { FindReleasesRepository } from '../ports/find-releases.repository';
 import { FindSprintsRepository } from '../ports/find-sprints.repository';
 
+import { PROPOSAL_LABEL } from '../commands/submit-proposal.command-handler';
+
 /** Tickets with this label are offered to newcomers on public pages. */
 export const GOOD_FIRST_LABEL = 'good-first-issue';
 
@@ -35,6 +37,8 @@ export interface Showcase {
     dueDate: string | null;
     percent: number;
     done: boolean;
+    /** How many want it. */
+    votes: number;
     path: string;
   }[];
   releases: {
@@ -46,6 +50,20 @@ export interface Showcase {
     notes: string | null;
   }[];
   goodFirst: { key: string; title: string; type: string; path: string }[];
+  /** Bug reports and ideas from the public: whether it takes them, where, and the open ones. */
+  proposals: {
+    open: boolean;
+    /** The form in the web app, while it takes them. */
+    path: string | null;
+    /** Open proposals, most voted first. */
+    top: {
+      key: string;
+      title: string;
+      type: string;
+      votes: number;
+      path: string;
+    }[];
+  };
 }
 
 export class GetShowcaseQuery extends Query<Showcase> {
@@ -55,6 +73,11 @@ export class GetShowcaseQuery extends Query<Showcase> {
 }
 
 const FINISHED = [StatusCategory.DONE, StatusCategory.CANCELLED];
+const OPEN = [
+  StatusCategory.TODO,
+  StatusCategory.IN_PROGRESS,
+  StatusCategory.QA,
+];
 
 @QueryHandler(GetShowcaseQuery)
 export class GetShowcaseQueryHandler
@@ -74,7 +97,7 @@ export class GetShowcaseQueryHandler
       (await this.findProjects.findByKey(query.project.toUpperCase()));
     if (!project?.isPublic) throw new NotFoundError('Project', query.project);
     const path = (key: string) => `/p/${project.key}/issues/${key}`;
-    const [epics, releases, sprint, goodFirst] = await Promise.all([
+    const [epics, releases, sprint, goodFirst, proposals] = await Promise.all([
       this.findIssues.epics(project.id),
       this.findReleases.findByProject(project.id),
       this.findSprints.findActive(project.id),
@@ -85,6 +108,13 @@ export class GetShowcaseQueryHandler
         limit: 20,
         offset: 0,
       }),
+      this.findIssues.search({
+        projectId: project.id,
+        labels: [PROPOSAL_LABEL],
+        categories: OPEN,
+        limit: 100,
+        offset: 0,
+      }),
     ]);
     const visible = releases
       .filter((r) => r.status !== ReleaseStatus.ARCHIVED)
@@ -120,6 +150,7 @@ export class GetShowcaseQueryHandler
         dueDate: issue.dueDate,
         percent: p.percent,
         done: FINISHED.includes(issue.statusCategory),
+        votes: issue.votes,
         path: path(issue.key),
       })),
       releases: visible.map((r, i) => ({
@@ -136,6 +167,20 @@ export class GetShowcaseQueryHandler
         type: i.type,
         path: path(i.key),
       })),
+      proposals: {
+        open: project.acceptsProposals,
+        path: project.acceptsProposals ? `/p/${project.key}/proponer` : null,
+        top: [...proposals.items]
+          .sort((a, b) => b.votes - a.votes)
+          .slice(0, 10)
+          .map((i) => ({
+            key: i.key,
+            title: i.title,
+            type: i.type,
+            votes: i.votes,
+            path: path(i.key),
+          })),
+      },
     };
   }
 }