standardize mobile api transport for gyms and core services

apps/mobile/src/api/client.ts

@@ -1,18 +1,52 @@
-import axios from 'axios';
-import { API_BASE_URL } from '../config/api';
+import axios, { type AxiosRequestConfig } from "axios";
+import { API_BASE_URL } from "../config/api";
+import log from "../utils/logger";
 
 export const apiClient = axios.create({
-    baseURL: API_BASE_URL,
-    headers: {
-        'Content-Type': 'application/json',
-    },
+  baseURL: API_BASE_URL,
+  timeout: 15000,
+  headers: {
+    "Content-Type": "application/json",
+  },
 });
 
+apiClient.interceptors.response.use(
+  (response) => response,
+  (error) => {
+    if (axios.isAxiosError(error)) {
+      const status = error.response?.status;
+      if (status === 401) {
+        log.warn("API unauthorized response", { url: error.config?.url });
+      } else if (status === 403) {
+        log.warn("API forbidden response", { url: error.config?.url });
+      } else if (status && status >= 500) {
+        log.error("API server error", error, {
+          status,
+          url: error.config?.url,
+        });
+      }
+    }
+    return Promise.reject(error);
+  },
+);
+
+export function withAuth(token?: string | null): AxiosRequestConfig {
+  if (!token) {
+    return {};
+  }
+
+  return {
+    headers: {
+      Authorization: `Bearer ${token}`,
+    },
+  };
+}
+
 // Helper to set the auth token for a request
 export const setAuthToken = (token: string) => {
-    if (token) {
-        apiClient.defaults.headers.common['Authorization'] = `Bearer ${token}`;
-    } else {
-        delete apiClient.defaults.headers.common['Authorization'];
-    }
+  if (token) {
+    apiClient.defaults.headers.common.Authorization = `Bearer ${token}`;
+  } else {
+    delete apiClient.defaults.headers.common.Authorization;
+  }
 };