feat: steadier live updates and notices for public proposals

- The web pings the live connection, reconnects when it goes quiet and
  reloads what each screen shows after reconnecting.
- Dropping a card on a column it cannot go to puts it back.
- Owners and admins get a notice when a proposal arrives.
- The proposal limit lives in Redis, so it holds across instances.
- REST tells whether I voted; pasted images leave the attachment list.
- Deleting a project removes its Git integration; no lint warnings left.
- Reactions and the blocked badge are components of their own.
- Docs: what is done and what is left (chapter 10), Word and PDF.

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

libs/web/tracker/presenters/src/lib/ui/blocked.ts

@@ -0,0 +1,54 @@
+import { ChangeDetectionStrategy, Component, input } from '@angular/core';
+import { RouterLink } from '@angular/router';
+import { PiIconComponent } from '@pi/ui';
+import { IssueParent } from '@task-stream/web/tracker/domain';
+
+/**
+ * 🔒 «Bloqueado»: the ticket waits for others still open. `compact` for
+ * cards and rows (the keys go in the tooltip); in full, they link.
+ */
+@Component({
+  selector: 'ts-blocked',
+  changeDetection: ChangeDetectionStrategy.OnPush,
+  imports: [PiIconComponent, RouterLink],
+  host: { role: 'status', '[title]': 'tooltip()' },
+  template: `
+    <pi-icon icon="lock" size="x-small" aria-hidden="true" />
+    @if (compact()) {
+      Bloqueado
+    } @else {
+      Bloqueado por
+      @for (blocker of blockers(); track blocker.id) {
+        <a class="ts-key" [routerLink]="['..', blocker.key]">{{
+          blocker.key
+        }}</a>
+      }
+    }
+  `,
+  styles: `
+    :host {
+      display: inline-flex;
+      flex-wrap: wrap;
+      gap: 0.25rem 0.375rem;
+      align-items: center;
+      padding: 0.0625rem 0.5rem;
+      border-radius: 999px;
+      background: color-mix(in srgb, var(--ts-c-red, #d33) 12%, transparent);
+      color: var(--ts-c-red, var(--ts-ink));
+      font-size: 0.75rem;
+      font-weight: 600;
+    }
+    .ts-key {
+      color: inherit;
+    }
+  `,
+})
+export class BlockedComponent {
+  readonly blockers = input.required<IssueParent[]>();
+  readonly compact = input(false);
+  protected tooltip(): string {
+    return this.blockers()
+      .map((b) => `${b.key}: ${b.title}`)
+      .join('\n');
+  }
+}