feature: a very minimal patients feature implemented. it needs lots of improvments though

frontend/src/lib/api/patients.ts

@@ -0,0 +1,43 @@
+import { apiClient } from './client';
+import {
+  CreatePatientInput,
+  CreateTreatmentHistoryInput,
+  Patient,
+  PatientsListResponse,
+  TreatmentHistoryItem,
+} from '@/types/patient';
+
+export const patientsApi = {
+  list: async (params?: { q?: string; page?: number; limit?: number }): Promise<PatientsListResponse> => {
+    const response = await apiClient.get('/patients', { params });
+    return response.data;
+  },
+
+  create: async (data: CreatePatientInput): Promise<{ success: boolean; data: Patient }> => {
+    const response = await apiClient.post('/patients', data);
+    return response.data;
+  },
+
+  getOne: async (id: string): Promise<{ success: boolean; data: Patient }> => {
+    const response = await apiClient.get(`/patients/${id}`);
+    return response.data;
+  },
+
+  listTreatments: async (
+    patientId: string,
+    limit = 20,
+  ): Promise<{ success: boolean; data: TreatmentHistoryItem[] }> => {
+    const response = await apiClient.get(`/patients/${patientId}/treatments`, {
+      params: { limit },
+    });
+    return response.data;
+  },
+
+  addTreatment: async (
+    patientId: string,
+    data: CreateTreatmentHistoryInput,
+  ): Promise<{ success: boolean; data: TreatmentHistoryItem }> => {
+    const response = await apiClient.post(`/patients/${patientId}/treatments`, data);
+    return response.data;
+  },
+};