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/web/tracker/presenters/src/lib/pages/settings.page.ts

@@ -1,3 +1,4 @@
+import { RouterLink } from '@angular/router';
 import {
   CdkDrag,
   CdkDragDrop,
@@ -56,6 +57,7 @@ function idFrom(name: string): string {
   selector: 'ts-settings-page',
   changeDetection: ChangeDetectionStrategy.OnPush,
   imports: [
+    RouterLink,
     GitIntegrationComponent,
     WebhooksComponent,
     TransferComponent,
@@ -119,6 +121,44 @@ function idFrom(name: string): string {
           <span>{{ project.isPublic ? 'Público' : 'Privado' }}</span>
         </label>
       </section>
+
+      <section
+        class="ts-panel ts-block ts-visibility"
+        aria-labelledby="proposals-title"
+      >
+        <div>
+          <h3 id="proposals-title">Propuestas del público</h3>
+          <p class="ts-muted">
+            @if (!project.isPublic) {
+              Solo para proyectos públicos: hazlo público para abrir un
+              formulario donde cualquiera, sin cuenta, reporte un error o
+              proponga una idea.
+            } @else if (project.acceptsProposals) {
+              Abierto: cualquiera puede enviar un error o una idea desde
+              <a class="ts-plain-link" routerLink="../proponer">el formulario</a
+              >. Llegan como tickets con la etiqueta «propuesta», y se pueden
+              votar.
+            } @else {
+              Cerrado. Ábrelo para que cualquiera, sin cuenta, pueda reportar un
+              error o proponer una idea; llegarán como tickets con la etiqueta
+              «propuesta».
+            }
+          </p>
+        </div>
+        <label class="ts-switch">
+          <input
+            type="checkbox"
+            role="switch"
+            [checked]="project.isPublic && project.acceptsProposals"
+            [disabled]="!facade.canManage() || !project.isPublic"
+            (change)="facade.setAcceptsProposals($any($event.target).checked)"
+          />
+          <span class="ts-switch__track" aria-hidden="true"></span>
+          <span>{{
+            project.isPublic && project.acceptsProposals ? 'Abierto' : 'Cerrado'
+          }}</span>
+        </label>
+      </section>
     }
 
     @if (draft(); as d) {