fix: resolve cross-platform contactMethods JSON parsing inconsistencies

- Add platform-agnostic parseJsonField utility for contactMethods handling
- Update contact export functions (contactsToExportJson, contactToCsvLine)
- Fix contact storage in QR scan views (ContactQRScanShowView, ContactQRScanFullView)
- Ensure consistent JSON string storage across web SQLite and Capacitor SQLite
- Prevents "[object Object] is not valid JSON" errors when switching platforms
- Maintains compatibility between auto-parsing web SQLite and raw string Capacitor SQLite

Fixes: contactMethods parsing errors in export and QR scan functionality
Related: searchBoxes field had similar issue (already fixed)

src/views/ContactImportView.vue

@@ -213,6 +213,7 @@ import {
 } from "../db/index";
 import { Contact, ContactMethod } from "../db/tables/contacts";
 import * as databaseUtil from "../db/databaseUtil";
+import { parseJsonField } from "../db/databaseUtil";
 import * as libsUtil from "../libs/util";
 import {
   capitalizeAndInsertSpacesBeforeCaps,
@@ -222,6 +223,7 @@ import {
 import { getContactJwtFromJwtUrl } from "../libs/crypto";
 import { decodeEndorserJwt } from "../libs/crypto/vc";
 import { PlatformServiceFactory } from "@/services/PlatformServiceFactory";
+import { logger } from "../utils/logger";
 
 /**
  * Interface for contact data as stored in the database
@@ -289,7 +291,7 @@ function dbRecordToContact(record: ContactDbRecord): Contact {
     profileImageUrl: safeString(record.profileImageUrl),
     publicKeyBase64: safeString(record.publicKeyBase64),
     nextPubKeyHashB64: safeString(record.nextPubKeyHashB64),
-    contactMethods: JSON.parse(record.contactMethods || "[]"),
+    contactMethods: parseJsonField(record.contactMethods, []),
   };
 }