feat: teams within a project

Projects keep teams of members in their settings (settings.teams; people
outside the project are dropped, teams are archived, not removed; absent
when saving means unchanged). Tickets go to a team (`team`, also filtered
in the list and in MCP search_issues), and a comment mentioning
@[Frontend](team-FRONT) tells each of its members. Settings has the teams
with their members, the ticket a «Equipo» select, the list a team filter,
and «@» offers the teams after the people.

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

libs/api/tracker/presenters/src/lib/common/settings.ts

@@ -27,6 +27,13 @@ export interface SettingsPayload {
     template?: { description?: string | null; checklist?: string[] } | null;
   }[];
   areas: { id: string; name: string; archived: boolean }[];
+  /** Absent when saving: unchanged. */
+  teams?: {
+    id: string;
+    name: string;
+    memberIds: string[];
+    archived: boolean;
+  }[];
   /** Definition of done. Absent when saving: unchanged. */
   checklistBeforeDone?: boolean;
   /** Absent when saving: unchanged. */
@@ -44,6 +51,7 @@ export function toSettingsPayload(settings: ProjectSettings): SettingsPayload {
     ...settings,
     customFields: settings.customFields ?? [],
     checklistBeforeDone: !!settings.checklistBeforeDone,
+    teams: settings.teams ?? [],
     transitions: settings.statuses.map((s) => ({
       from: s.id,
       to: settings.transitions[s.id] ?? [],
@@ -75,6 +83,7 @@ export function fromSettingsPayload(payload: SettingsPayload): ProjectSettings {
         : {}),
     })),
     areas: payload.areas,
+    ...(payload.teams ? { teams: payload.teams } : {}),
     ...(payload.checklistBeforeDone != null
       ? { checklistBeforeDone: payload.checklistBeforeDone }
       : {}),