feat: a dashboard for clients, behind a secret link

Owners and admins turn it on in Configuración → General, pick what it
shows (tickets per status, the sprint under way, release forecasts,
open epics and activity per day) and can renew or drop the link. Whoever
has it sees /share/{token} without an account: only those blocks, no
people nor single tickets but the epics, no links into the app, read
again every minute. A renewed or dropped link says it no longer works.

REST (GET/PUT/DELETE /api/projects/{project}/share and the public
GET /api/shared/dashboards/{token}) and GraphQL (dashboardShare,
shareDashboard, unshareDashboard, sharedDashboard). The token is kept
in dashboard_shares and goes with the project.

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

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

@@ -45,6 +45,15 @@ export const trackerRoutes: Routes = [
     loadComponent: () =>
       import('./pages/explore.page').then((m) => m.ExplorePage),
   },
+  {
+    // A project's dashboard for its clients: the token is the access.
+    path: 'share/:token',
+    title: 'Estado del proyecto · TaskStream',
+    loadComponent: () =>
+      import('./pages/shared-dashboard.page').then(
+        (m) => m.SharedDashboardPage,
+      ),
+  },
   // The Spanish paths, from links shared before.
   { path: 'cartera', redirectTo: 'portfolio' },
   { path: 'explorar', redirectTo: 'explore' },