feat(web): dependencies between epics on the roadmap

Arrows from an epic to the ones that wait for it («bloquea» / «depende
de»), drawn over the bars; dashed red, plus a note in words, when one
starts before the epic blocking it ends. The next batch and the ideas
kept or dropped are written down in docs/10-futuro.

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

libs/web/tracker/application/src/lib/facades/facades.spec.ts

@@ -233,6 +233,7 @@ describe('ProjectFacade', () => {
       transitions: [],
       issueTypes: [],
       areas: [],
+      customFields: [],
     };
 
     project.saveSettings(settings);