feat: link commits, branches and pull requests to tickets

A project can turn on a webhook for GitHub, Gitea or GitLab. Pushes and
pull or merge requests that name a ticket key show on that ticket under
Desarrollo, with the state of each pull request; the secret is shown and
rotated from the project settings.

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

libs/web/tracker/presenters/src/lib/pages/issue.page.ts

@@ -38,6 +38,7 @@ import {
 import {
   Attachment,
   Comment,
+  DevLink,
   insertMention,
   IssueLink,
   IssueLinkType,
@@ -457,6 +458,39 @@ const MAX_FILE_BYTES = 25 * 1024 * 1024;
             }
           </article>
 
+          @if (issue.devLinks.length) {
+            <article class="ts-block">
+              <h2 class="ts-section">
+                Desarrollo
+                <span class="ts-mono">{{ issue.devLinks.length }}</span>
+              </h2>
+              <ul class="ts-dev">
+                @for (link of devLinks(); track link.url) {
+                  <li class="ts-dev__item">
+                    <span class="ts-dev__kind">{{ devKind(link) }}</span>
+                    <a
+                      class="ts-dev__title"
+                      [href]="link.url"
+                      target="_blank"
+                      rel="noopener"
+                      >{{ link.title }}</a
+                    >
+                    <code class="ts-dev__ref">{{ link.ref }}</code>
+                    @if (link.state) {
+                      <span class="ts-pill" [attr.data-state]="link.state">{{
+                        devState(link)
+                      }}</span>
+                    }
+                    <span class="ts-muted ts-dev__when"
+                      >{{ link.author ? link.author + ' · ' : ''
+                      }}{{ ago(link.at) }}</span
+                    >
+                  </li>
+                }
+              </ul>
+            </article>
+          }
+
           <article class="ts-block">
             <h2 class="ts-section">
               Comentarios
@@ -887,6 +921,26 @@ export class IssuePage {
       )
       .slice(0, 6);
   });
+  /** Pull requests first, then the newest. */
+  protected readonly devLinks = computed(() =>
+    [...(this.facade.issue()?.devLinks ?? [])].sort(
+      (a, b) =>
+        Number(b.kind === 'PULL_REQUEST') - Number(a.kind === 'PULL_REQUEST') ||
+        b.at.localeCompare(a.at),
+    ),
+  );
+  protected devKind = (link: DevLink) =>
+    link.kind === 'PULL_REQUEST'
+      ? 'PR'
+      : link.kind === 'BRANCH'
+        ? 'Rama'
+        : 'Commit';
+  protected devState = (link: DevLink) =>
+    link.state === 'MERGED'
+      ? 'Fusionada'
+      : link.state === 'CLOSED'
+        ? 'Cerrada'
+        : 'Abierta';
   protected readonly checklistText = signal('');
   protected readonly subtaskTitle = signal('');
   protected readonly subtaskType = signal<string | null>(null);