add first cut at deep-link redirecting, with one example contact-import that works on mobile

src/services/api.ts

@@ -6,7 +6,7 @@
  */
 
 import { AxiosError } from "axios";
-import { logger } from "../utils/logger";
+import { logger, safeStringify } from "../utils/logger";
 
 /**
  * Handles API errors with platform-specific logging and error processing.
@@ -37,7 +37,8 @@ import { logger } from "../utils/logger";
  */
 export const handleApiError = (error: AxiosError, endpoint: string) => {
   if (process.env.VITE_PLATFORM === "capacitor") {
-    logger.error(`[Capacitor API Error] ${endpoint}:`, {
+    const endpointStr = safeStringify(endpoint); // we've seen this as an object in deep links
+    logger.error(`[Capacitor API Error] ${endpointStr}:`, {
       message: error.message,
       status: error.response?.status,
       data: error.response?.data,