feat: estimate tickets and see the team's velocity

Story points can be set on the ticket page and when creating a ticket,
and show on cards, column headers, subtasks and the backlog. The Sprints
tab charts the points finished per closed sprint and warns when a planned
sprint holds more than the recent average.

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

libs/web/tracker/presenters/src/lib/pages/issue.page.ts

@@ -44,6 +44,7 @@ import {
   matches,
   mentionQuery,
   mentionSegments,
+  POINT_SCALE,
   ReleaseStatus,
 } from '@task-stream/web/tracker/domain';
 import {
@@ -51,6 +52,7 @@ import {
   initials,
   LINK,
   options,
+  pointOptions,
   PRIORITY,
   statusLook,
   timeAgo,
@@ -248,7 +250,17 @@ const MAX_FILE_BYTES = 25 * 1024 * 1024;
             </h2>
             @if (facade.children().length) {
               <pi-progress-bar
-                [label]="facade.childProgress().percent + '% terminado'"
+                [label]="
+                  facade.childProgress().percent +
+                  '% terminado' +
+                  (facade.childProgress().storyPoints
+                    ? ' · ' +
+                      facade.childProgress().finishedStoryPoints +
+                      ' de ' +
+                      facade.childProgress().storyPoints +
+                      ' puntos'
+                    : '')
+                "
                 [value]="facade.childProgress().percent"
               />
               <ul class="ts-children">
@@ -618,6 +630,14 @@ const MAX_FILE_BYTES = 25 * 1024 * 1024;
           >
             <pi-label>Prioridad</pi-label>
           </pi-select-field>
+          <pi-select-field
+            [options]="pointsOptions()"
+            [disabled]="!project.canContribute()"
+            [value]="issue.storyPoints === null ? '' : '' + issue.storyPoints"
+            (valueChange)="update({ storyPoints: $event ? +$event : null })"
+          >
+            <pi-label>Estimación</pi-label>
+          </pi-select-field>
           <pi-select-field
             [options]="areaOptions()"
             [disabled]="!project.canContribute()"
@@ -801,6 +821,9 @@ export class IssuePage {
     );
   });
   protected readonly priorityOptions = options(PRIORITY);
+  protected readonly pointsOptions = computed(() =>
+    pointOptions(POINT_SCALE, this.facade.issue()?.storyPoints ?? null),
+  );
   /** Active values, plus the ticket's own even if archived since. */
   protected readonly typeOptions = computed<PiSelectFieldOption<string>[]>(
     () => {
@@ -964,6 +987,7 @@ export class IssuePage {
     type?: string;
     priority?: IssuePriority;
     area?: string | null;
+    storyPoints?: number | null;
   }): void {
     this.facade.update(changes);
   }