improvement: lab/clinic commiunication flow completely overhauled. no more shit.

frontend/src/lib/api/notifications.ts

@@ -1,4 +1,5 @@
 import { apiClient } from '@/lib/api/client';
+import type { LabCaseActivityItem } from '@/types/lab-case-activity';
 import type { LabCaseTabReadTarget, TabBadgeCounts } from '@/lib/tabBadgeUtils';
 
 export const notificationsApi = {
@@ -7,6 +8,16 @@ export const notificationsApi = {
     return response.data;
   },
 
+  listLabCaseActivities: async (
+    labCaseId: string,
+    limit = 50,
+  ): Promise<{ success: boolean; data: LabCaseActivityItem[] }> => {
+    const response = await apiClient.get(`/notifications/lab-cases/${labCaseId}/activities`, {
+      params: { limit },
+    });
+    return response.data;
+  },
+
   markTabRead: async (tab: LabCaseTabReadTarget): Promise<{ success: boolean }> => {
     const response = await apiClient.post('/notifications/mark-tab-read', { tab });
     return response.data;

frontend/src/lib/api/treatments.ts

@@ -24,6 +24,21 @@ export const treatmentsApi = {
     return response.data;
   },
 
+  listPatientLabCases: async (
+    patientId: string,
+  ): Promise<{ success: boolean; data: import('@/types/lab-case-activity').PatientLabCaseSummary[] }> => {
+    const response = await apiClient.get(`/treatments/patients/${patientId}/lab-cases`);
+    return response.data;
+  },
+
+  listUnreadLabCases: async (): Promise<{
+    success: boolean;
+    data: import('@/types/lab-case-activity').PatientLabCaseSummary[];
+  }> => {
+    const response = await apiClient.get('/treatments/lab-cases/unread');
+    return response.data;
+  },
+
   getDraft: async (
     appointmentId: string,
   ): Promise<{ success: boolean; data: PastTreatment | null }> => {

frontend/src/lib/hooks/useTabBadgeCounts.ts

@@ -50,8 +50,8 @@ export function useMarkTabReadOnVisit() {
 
   useEffect(() => {
     const tab = tabFromPathname(pathname);
-    // Cases tab badge clears per opened case (mark-case-read), not on tab visit.
-    if (!tab || tab === 'CASES' || !currentOrganization?.id) return;
+    // Cases and Treatment tab badges clear per opened case (mark-case-read), not on tab visit.
+    if (!tab || tab === 'CASES' || tab === 'TREATMENT' || !currentOrganization?.id) return;
 
     void notificationsApi.markTabRead(tab).then(() => {
       window.dispatchEvent(new Event(tabBadgesChangedEventName()));

frontend/src/lib/labCaseActivityLabels.ts

@@ -0,0 +1,56 @@
+import type { LabCaseActivityItem } from '@/types/lab-case-activity';
+
+type ActivityLabelTranslator = (
+  key: string,
+  values?: Record<string, string | number>,
+) => string;
+
+export function formatLabCaseActivityLine(
+  activity: LabCaseActivityItem,
+  t: ActivityLabelTranslator,
+  locale: string,
+): string {
+  const actor = activity.actorName ?? t('activityUnknownActor');
+  const date = new Date(activity.createdAt).toLocaleString(locale, {
+    month: 'short',
+    day: 'numeric',
+    hour: '2-digit',
+    minute: '2-digit',
+  });
+
+  switch (activity.type) {
+    case 'CASE_SENT':
+      return t('activityCaseSent', { date });
+    case 'CLINIC_COMMENT':
+      return t('activityClinicComment', {
+        actor,
+        preview: truncatePreview(activity.commentBody),
+        date,
+      });
+    case 'LAB_COMMENT':
+      return t('activityLabComment', {
+        actor,
+        preview: truncatePreview(activity.commentBody),
+        date,
+      });
+    case 'TASK_COMPLETED':
+      return t('activityTaskCompleted', {
+        step: activity.stepLabel ?? t('activityUnknownStep'),
+        actor,
+        date,
+      });
+    case 'CASE_IMPORTANT':
+      return t('activityCaseImportant', { actor, date });
+    case 'CASE_AMENDED':
+      return t('activityCaseAmended', { actor, date });
+    default:
+      return t('activityGeneric', { date });
+  }
+}
+
+function truncatePreview(text: string | null | undefined, max = 60): string {
+  const trimmed = text?.trim() ?? '';
+  if (!trimmed) return '…';
+  if (trimmed.length <= max) return trimmed;
+  return `${trimmed.slice(0, max - 1)}…`;
+}