improvement: notify counter badge added to treatment and tasks tabs for upadted and edited cases.

frontend/src/lib/api/notifications.ts

@@ -0,0 +1,19 @@
+import { apiClient } from '@/lib/api/client';
+import type { LabCaseTabReadTarget, TabBadgeCounts } from '@/lib/tabBadgeUtils';
+
+export const notificationsApi = {
+  tabCounts: async (): Promise<{ success: boolean; data: TabBadgeCounts }> => {
+    const response = await apiClient.get('/notifications/tab-counts');
+    return response.data;
+  },
+
+  markTabRead: async (tab: LabCaseTabReadTarget): Promise<{ success: boolean }> => {
+    const response = await apiClient.post('/notifications/mark-tab-read', { tab });
+    return response.data;
+  },
+
+  markCaseRead: async (labCaseId: string): Promise<{ success: boolean }> => {
+    const response = await apiClient.post('/notifications/mark-case-read', { labCaseId });
+    return response.data;
+  },
+};