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/ui/vote.ts

@@ -0,0 +1,78 @@
+import {
+  ChangeDetectionStrategy,
+  Component,
+  input,
+  output,
+} from '@angular/core';
+
+/**
+ * ▲ 3: how many want a ticket. A button for whoever can vote (the
+ * signed-in, on a public project), the count alone for the rest.
+ */
+@Component({
+  selector: 'ts-vote',
+  changeDetection: ChangeDetectionStrategy.OnPush,
+  template: `
+    @if (canVote()) {
+      <button
+        type="button"
+        class="ts-vote"
+        [class.is-mine]="voted()"
+        [attr.aria-pressed]="voted()"
+        [attr.aria-label]="
+          (voted() ? 'Quitar mi voto · ' : 'Votar · ') + votes()
+        "
+        [title]="voted() ? 'Quitar mi voto' : 'Votar'"
+        (click)="voteChange.emit(!voted())"
+      >
+        ▲ <span>{{ votes() }}</span>
+      </button>
+    } @else {
+      <span class="ts-vote is-static" title="Votos">▲ {{ votes() }}</span>
+    }
+  `,
+  styles: `
+    :host {
+      display: inline-flex;
+    }
+    /* @pi/ui styles every <button> (min-width, padding, radius, border) too
+       specifically to override without !important. */
+    .ts-vote {
+      display: inline-flex;
+      gap: 0.25rem;
+      align-items: center;
+      min-width: 0 !important;
+      height: auto !important;
+      padding: 0.0625rem 0.5rem !important;
+      border: 1px solid var(--ts-line) !important;
+      border-radius: 999px !important;
+      line-height: 1.5;
+      background: var(--ts-surface);
+      color: var(--ts-muted);
+      font: inherit;
+      font-family: var(--ts-font-mono, ui-monospace, monospace);
+      font-size: 0.75rem;
+      white-space: nowrap;
+      cursor: pointer;
+      &:hover:not(.is-static) {
+        border-color: var(--ts-brand);
+        color: var(--ts-ink);
+      }
+      &.is-mine {
+        border-color: var(--ts-brand) !important;
+        background: color-mix(in srgb, var(--ts-brand) 12%, var(--ts-surface));
+        color: var(--ts-brand);
+      }
+      &.is-static {
+        cursor: default;
+      }
+    }
+  `,
+})
+export class VoteComponent {
+  readonly votes = input.required<number>();
+  readonly voted = input(false);
+  readonly canVote = input(false);
+  /** The new state: true to vote, false to take it back. */
+  readonly voteChange = output<boolean>();
+}