feat: sprints with burndown and carry-over

Plan sprints with dates and a goal, run one at a time per project, and
put tickets in them from the ticket page. The Sprints tab follows the one
under way with its progress and a burndown in tickets or points against
the ideal line. Closing a sprint sends what was left to the next one or
back to the backlog; the board can be filtered by sprint.

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

libs/web/tracker/application/src/lib/events/issue.events.ts

@@ -26,6 +26,10 @@ export const issuePageEvents = eventGroup({
       targetKey: string;
     }>(),
     unlinkRequested: type<LinkIssuesInput>(),
+    sprintChangeRequested: type<{
+      issueId: string;
+      sprintId: string | null;
+    }>(),
     releaseChangeRequested: type<{
       issueId: string;
       releaseId: string | null;

libs/web/tracker/application/src/lib/events/project.events.ts

@@ -10,6 +10,10 @@ import {
   ProjectStats,
   Release,
   ReleaseBurnup,
+  CreateSprintInput,
+  Sprint,
+  SprintBurndown,
+  UpdateSprintInput,
   UserDirectoryEntry,
 } from '@task-stream/web/tracker/domain';
 
@@ -23,6 +27,15 @@ export const projectPageEvents = eventGroup({
     releaseCreateRequested: type<CreateReleaseInput>(),
     releasePublishRequested: type<{ releaseId: string; force: boolean }>(),
     releaseArchiveRequested: type<{ releaseId: string }>(),
+    sprintCreateRequested: type<CreateSprintInput>(),
+    sprintUpdateRequested: type<UpdateSprintInput>(),
+    sprintStartRequested: type<{ sprintId: string }>(),
+    sprintCloseRequested: type<{
+      sprintId: string;
+      carryOverTo: string | null;
+    }>(),
+    sprintDeleteRequested: type<{ sprintId: string }>(),
+    burndownRequested: type<{ sprintId: string }>(),
     userSearchRequested: type<string>(),
     settingsSaveRequested: type<{
       projectId: string;
@@ -42,6 +55,8 @@ export const projectApiEvents = eventGroup({
     loadFailed: type<string>(),
     statsLoaded: type<ProjectStats>(),
     releasesLoaded: type<Release[]>(),
+    sprintsLoaded: type<Sprint[]>(),
+    burndownLoaded: type<SprintBurndown>(),
     activityLoaded: type<Activity[]>(),
     commandSucceeded: type<string>(),
     commandFailed: type<string>(),
@@ -63,5 +78,6 @@ export const projectRealtimeEvents = eventGroup({
     projectDeleted: type<Project>(),
     activityAdded: type<Activity>(),
     releaseChanged: type<Release>(),
+    sprintChanged: type<{ sprintId: string }>(),
   },
 });