improvement: task assignment flow added. cases and tasks feature updated accordingly.

frontend/src/types/cases.ts

@@ -39,6 +39,8 @@ export interface LabCaseTask {
   stepOrder: number;
   stepLabel: string;
   status: LabTaskStatus;
+  assignee: LabTaskUser | null;
+  assignedAt: string | null;
   createdAt: string;
   lastStatusChangedAt: string | null;
   lastStatusChangedBy: LabTaskUser | null;
@@ -150,6 +152,7 @@ export interface ListLabTasksParams {
   completed?: boolean;
   important?: boolean;
   pinImportant?: boolean;
+  assignedToMe?: boolean;
   sentFrom?: string;
   sentTo?: string;
   stepCompleted?: string;
@@ -167,6 +170,7 @@ export interface LocateTaskPageParams {
   status?: LabTaskStatus;
   important?: boolean;
   pinImportant?: boolean;
+  assignedToMe?: boolean;
   stepCompleted?: string;
   sortBy?: TaskSortField;
   sortDir?: 'asc' | 'desc';
@@ -192,6 +196,8 @@ export interface LabTaskListItem {
   stepLabel: string;
   status: LabTaskStatus;
   isImportant: boolean;
+  assignee: LabTaskUser | null;
+  assignedAt: string | null;
   lastStatusChangedAt: string | null;
   lastStatusChangedBy: LabTaskUser | null;
   createdAt: string;
@@ -205,6 +211,11 @@ export interface TaskFilterOptions {
   workflowSteps: { code: string; label: string }[];
 }
 
+export interface AssignableTaskStaff {
+  id: string;
+  name: string;
+}
+
 export interface PaginatedLabTasks {
   items: LabTaskListItem[];
   pagination: {