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/project-shell.page.ts

@@ -61,6 +61,11 @@ import { projectTone, PUBLIC_TONE, ROLE } from '../ui/copy';
               {{ project.description }}
             </p>
           }
+          @if (project.isPublic && project.acceptsProposals) {
+            <a class="ts-project-header__propose" routerLink="proponer">
+              ¿Has visto un error o tienes una idea? Cuéntanoslo →
+            </a>
+          }
         </div>
         <div class="ts-project-header__team">
           <ts-avatars [names]="memberNames()" [max]="6" />
@@ -85,6 +90,7 @@ import { projectTone, PUBLIC_TONE, ROLE } from '../ui/copy';
       }
       <nav class="ts-tabs" aria-label="Secciones del proyecto">
         <a routerLink="board" routerLinkActive="is-active">Tablero</a>
+        <a routerLink="list" routerLinkActive="is-active">Lista</a>
         <a routerLink="backlog" routerLinkActive="is-active">Backlog</a>
         <a routerLink="sprints" routerLinkActive="is-active">Sprints</a>
         <a routerLink="calendar" routerLinkActive="is-active">Calendario</a>
@@ -195,6 +201,16 @@ import { projectTone, PUBLIC_TONE, ROLE } from '../ui/copy';
       margin: 0.5rem 0 0;
       color: var(--ts-muted);
     }
+    .ts-project-header__propose {
+      display: inline-block;
+      margin-top: 0.625rem;
+      color: var(--ts-brand);
+      font-weight: 600;
+      text-decoration: none;
+      &:hover {
+        text-decoration: underline;
+      }
+    }
     .ts-project-header__team {
       display: flex;
       align-items: center;