feat(web): priority, estimate and assignee change right on the board card

The card's title is now the link (stretched over the card), and the three
chips carry an invisible native select each, so they work by keyboard,
on a phone and with a screen reader without opening the ticket. Dragging
still works from anywhere on the card.

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

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

@@ -6,9 +6,16 @@ import {
   CommandResult,
   CreateIssueInput,
   IssueChanged,
+  IssuePriority,
   SavedFilter,
 } from '@task-stream/web/tracker/domain';
 
+/** What a card can change without opening the ticket. */
+export type CardChange =
+  | { priority: IssuePriority }
+  | { storyPoints: number | null }
+  | { assigneeId: string | null };
+
 export const boardPageEvents = eventGroup({
   source: 'Board Page',
   events: {
@@ -21,6 +28,8 @@ export const boardPageEvents = eventGroup({
       reason?: string | null;
     }>(),
     issueCreateRequested: type<CreateIssueInput>(),
+    /** From the card: priority, estimate or assignee (the live update repaints it). */
+    issueEditRequested: type<{ issueId: string; change: CardChange }>(),
     /** Save the current filter under a name. */
     viewSaveRequested: type<{ name: string; shared: boolean }>(),
     viewDeleteRequested: type<{ id: string }>(),
@@ -33,6 +42,7 @@ export const boardApiEvents = eventGroup({
     loaded: type<BoardColumn[]>(),
     loadFailed: type<string>(),
     issueMoveFailed: type<string>(),
+    issueEditFailed: type<string>(),
     issueCreated: type<CommandResult>(),
     issueCreateFailed: type<string>(),
     viewsLoaded: type<SavedFilter[]>(),

libs/web/tracker/application/src/lib/facades/board.facade.ts

@@ -6,7 +6,7 @@ import {
   CreateIssueInput,
   sameCriteria,
 } from '@task-stream/web/tracker/domain';
-import { boardPageEvents } from '../events/board.events';
+import { boardPageEvents, CardChange } from '../events/board.events';
 import { BoardStore } from '../stores/board.store';
 
 /** Kanban board of a project, live. */
@@ -46,6 +46,11 @@ export class BoardFacade {
     this.dispatch.issueMoved({ issueId, to, reason });
   }
 
+  /** A change from the card itself, without opening the ticket. */
+  editIssue(issueId: string, change: CardChange): void {
+    this.dispatch.issueEditRequested({ issueId, change });
+  }
+
   createIssue(input: CreateIssueInput): void {
     this.dispatch.issueCreateRequested(input);
   }
@@ -65,3 +70,6 @@ export class BoardFacade {
 export function provideBoardFacade(): Provider[] {
   return [BoardStore, BoardFacade];
 }
+
+/** What a card can change by itself (see BoardFacade.editIssue). */
+export type { CardChange } from '../events/board.events';

libs/web/tracker/application/src/lib/stores/board.store.ts

@@ -186,6 +186,23 @@ export const BoardStore = signalStore(
               ),
           ),
         ),
+        edit$: events.on(boardPageEvents.issueEditRequested).pipe(
+          mergeMap(({ payload: { issueId, change } }) =>
+            ('assigneeId' in change
+              ? issues.assign(issueId, change.assigneeId)
+              : issues.update({ issueId, ...change })
+            ).pipe(
+              mapResponse({
+                next: () => null,
+                error: (error) =>
+                  boardApiEvents.issueEditFailed(describeError(error)),
+              }),
+            ),
+          ),
+        ),
+        editFailed$: events
+          .on(boardApiEvents.issueEditFailed)
+          .pipe(tap(({ payload }) => notifications.error(payload))),
         /** The API refused the move: tell the user and put the card back. */
         rollback$: events.on(boardApiEvents.issueMoveFailed).pipe(
           tap(({ payload }) => notifications.error(payload)),