feat(web): English paths, and a portfolio that updates itself

/cartera, /explorar and /p/:key/proponer are /portfolio, /explore and
/p/:key/propose now, like every other path; the Spanish ones redirect,
so links already shared keep working. Settings sections go by
?section= with English names.

The portfolio reads itself again, quietly, when a ticket, sprint or
release of the projects shown changes, when my projects change, or when
the live connection comes back; «En directo» replaces the refresh
button.

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

libs/web/tracker/application/src/lib/events/portfolio.events.ts

@@ -16,3 +16,11 @@ export const portfolioApiEvents = eventGroup({
     loadFailed: type<string>(),
   },
 });
+
+/** Something changed in one of my projects: reload, quietly. */
+export const portfolioLiveEvents = eventGroup({
+  source: 'Portfolio Live',
+  events: {
+    changed: type<void>(),
+  },
+});