improvement: tasks feature UX fully overhauled.

frontend/src/types/cases.ts

@@ -150,6 +150,7 @@ export interface ListLabTasksParams {
   important?: boolean;
   sentFrom?: string;
   sentTo?: string;
+  stepCompleted?: string;
   sortBy?: TaskSortField;
   sortDir?: 'asc' | 'desc';
   page?: number;
@@ -172,10 +173,16 @@ export interface LabTaskListItem {
   lastStatusChangedAt: string | null;
   lastStatusChangedBy: LabTaskUser | null;
   createdAt: string;
+  caseSentAt: string | null;
   clinic: { id: string; name: string };
   patient: { id: string; firstName: string; lastName: string };
 }
 
+export interface TaskFilterOptions {
+  clinics: { id: string; name: string }[];
+  workflowSteps: { code: string; label: string }[];
+}
+
 export interface PaginatedLabTasks {
   items: LabTaskListItem[];
   pagination: {