feat: portfolio of all my projects

/cartera (and GraphQL portfolio, REST /api/me/portfolio, MCP
get_portfolio) shows every active project I belong to (not archived, not
as a guest) at a glance: open, overdue, blocked and stuck tickets, the
sprint under way and whether it gets there, planned releases with their
forecast, and the open epics with their progress. It reuses the
dashboard's computations. A release with no tickets now reads «Sin
tickets» instead of «Todo hecho», here and on the dashboard.

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

libs/web/tracker/presenters/src/lib/tracker.routes.ts

@@ -14,6 +14,13 @@ export const trackerRoutes: Routes = [
     loadComponent: () =>
       import('./pages/projects.page').then((m) => m.ProjectsPage),
   },
+  {
+    path: 'cartera',
+    canActivate: [authGuard],
+    title: 'Cartera · TaskStream',
+    loadComponent: () =>
+      import('./pages/portfolio.page').then((m) => m.PortfolioPage),
+  },
   {
     path: 'explorar',
     title: 'Proyectos públicos · TaskStream',