fix(kanban): add missing currentUser, fix protected access, remove non-null assertions

- Add currentUser computed to KanbanBoardDetailInfoService (used by component but missing)
- Change leaderId/collaborators from protected to public (accessed by TaskDetailComponent)
- Replace collaborator()with local variable guard in task-detail.component
- Replace days! with days ?? 0

Author: Awakich

projects/social_platform/src/app/api/kanban/kanban-board-detail-info.service.ts

@@ -63,12 +63,18 @@ export class KanbanBoardDetailInfoService {
   private deleteTaskSubject = new Subject<number>();
   private readonly profile = this.profileInfoService.profile;
 
+  readonly currentUser = computed(() => {
+    const p = this.profile();
+    if (!p) return undefined;
+    return { id: p.id, avatar: p.personal.avatar, firstName: p.firstName, lastName: p.lastName };
+  });
+
   setTaskDetailInfo(detail: TaskDetail | undefined) {
     this.taskDetail.set(detail);
   }
 
-  protected readonly leaderId = this.projectsDetailUIInfoService.leaderId;
-  protected readonly collaborators = this.projectsDetailUIInfoService.collaborators;
+  readonly leaderId = this.projectsDetailUIInfoService.leaderId;
+  readonly collaborators = this.projectsDetailUIInfoService.collaborators;
 
   isLeader = computed(() => {
     const user = this.profile();

projects/social_platform/src/app/ui/pages/projects/detail/kanban/components/task/detail/task-detail.component.ts

@@ -255,8 +255,9 @@ export class TaskDetailComponent implements OnInit, AfterViewInit, OnDestroy {
   }
 
   get responsiblePickOpenOptions() {
-    return this.collaborators()?.length
-      ? this.collaborators()!.map(collaborator => ({
+    const collabs = this.collaborators();
+    return collabs?.length
+      ? collabs.map(collaborator => ({
           id: collaborator.userId,
           label: collaborator.firstName + " " + collaborator.lastName[0],
           value: collaborator.userId,
@@ -266,8 +267,9 @@ export class TaskDetailComponent implements OnInit, AfterViewInit, OnDestroy {
   }
 
   get goalPickOptions() {
-    return this.goals()?.length
-      ? this.goals()!.map(goal => ({
+    const items = this.goals();
+    return items?.length
+      ? items.map(goal => ({
           id: goal.id,
           label: goal.title,
           value: goal.id,
@@ -313,7 +315,7 @@ export class TaskDetailComponent implements OnInit, AfterViewInit, OnDestroy {
       days = daysUntil(deadline);
     }
 
-    const color = status === "закончена" ? "red" : this.getColorByDays(days!);
+    const color = status === "закончена" ? "red" : this.getColorByDays(days ?? 0);
 
     return {
       text: status,