feat: link commits, branches and pull requests to tickets

A project can turn on a webhook for GitHub, Gitea or GitLab. Pushes and
pull or merge requests that name a ticket key show on that ticket under
Desarrollo, with the state of each pull request; the secret is shown and
rotated from the project settings.

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

libs/web/tracker/domain/src/lib/models/models.ts

@@ -151,10 +151,33 @@ export interface Issue extends IssueSummary {
   /** People following the ticket. */
   watchers: UserRef[];
   checklist: ChecklistItem[];
+  /** Commits, branches and pull requests that mention it. */
+  devLinks: DevLink[];
   allowedTransitions: string[];
   createdAt: string;
 }
 
+/** A commit, branch or pull request that mentions a ticket. */
+export interface DevLink {
+  kind: 'COMMIT' | 'BRANCH' | 'PULL_REQUEST';
+  url: string;
+  title: string;
+  /** Short SHA, branch or PR number. */
+  ref: string;
+  state: 'OPEN' | 'MERGED' | 'CLOSED' | null;
+  provider: string;
+  author: string | null;
+  at: string;
+}
+
+/** The project's webhook for GitHub, Gitea or GitLab. */
+export interface GitIntegration {
+  enabled: boolean;
+  /** Only for owners and admins. */
+  secret: string | null;
+  webhookPath: string;
+}
+
 export interface Comment {
   id: string;
   issueId: string;

libs/web/tracker/domain/src/lib/ports/gateways.ts

@@ -5,6 +5,7 @@ import {
   BoardColumn,
   Comment,
   Epic,
+  GitIntegration,
   SavedFilter,
   Sprint,
   SprintBurndown,
@@ -130,6 +131,14 @@ export abstract class IssuesGateway {
   ): Observable<CommandResult>;
 }
 
+/** The project's Git webhook (owners and admins configure it). */
+export abstract class GitGateway {
+  abstract integration(projectId: string): Observable<GitIntegration>;
+  /** On with a new secret (also to rotate it). */
+  abstract enable(projectId: string): Observable<GitIntegration>;
+  abstract disable(projectId: string): Observable<void>;
+}
+
 /** Saved views of a project's board (mine and the shared ones). */
 export abstract class SavedFiltersGateway {
   abstract list(projectId: string): Observable<SavedFilter[]>;