feat(web): printable report of a sprint or a release

/p/:key/report/(sprint|release)/🆔 what it is, its totals, the release
notes and its tickets by stage. «Imprimir o guardar en PDF» opens the
browser's dialog; on paper the app's header, tabs, tinted panels and
lights are left out. Linked from Sprints and Releases.

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

apps/web/src/app/app.routes.spec.ts

@@ -37,6 +37,7 @@ describe('appRoutes', () => {
       'epics',
       'trash',
       'releases',
+      'report/:kind/:id',
       'dashboard',
       'analytics',
       'settings',

apps/web/src/styles.scss

@@ -618,3 +618,34 @@ html.dark-mode .pi-shell {
     background-color: var(--ts-surface-raised) !important;
   }
 }
+
+// Printing a report (/p/:key/report/…): the report alone, on white paper.
+@media print {
+  body:has(ts-report-page) {
+    background: #fff !important;
+    color: #000;
+
+    .ts-header,
+    .ts-project-header,
+    .ts-tabs,
+    .ts-main::before,
+    .ts-main::after {
+      display: none !important;
+    }
+
+    .ts-main {
+      padding: 0;
+    }
+
+    // No tinted panels or soft lights on paper.
+    .ts-panel {
+      background: none !important;
+      box-shadow: none !important;
+
+      &::before,
+      &::after {
+        display: none !important;
+      }
+    }
+  }
+}