fix: preserve contact methods and notes in export/import workflow

- Fix contactMethods not being exported (was checking for string instead of array)
- Add missing notes and iViewContent fields to $insertContact method
- Normalize empty strings to null when saving contacts in ContactEditView

This ensures contact data integrity is maintained during export/import operations.

src/components/DataExportSection.vue

@@ -257,12 +257,30 @@ export default class DataExportSection extends Vue {
         // first remove the contactMethods field, mostly to cast to a clear type (that will end up with JSON objects)
         const exContact: Contact = R.omit(["contactMethods"], contact);
         // now add contactMethods as a true array of ContactMethod objects
-        exContact.contactMethods = contact.contactMethods
-          ? typeof contact.contactMethods === "string" &&
-            contact.contactMethods.trim() !== ""
-            ? JSON.parse(contact.contactMethods)
-            : []
-          : [];
+        // $contacts() returns normalized contacts where contactMethods is already an array,
+        // but we handle both array and string cases for robustness
+        if (contact.contactMethods) {
+          if (Array.isArray(contact.contactMethods)) {
+            // Already an array, use it directly
+            exContact.contactMethods = contact.contactMethods;
+          } else {
+            // Check if it's a string that needs parsing (shouldn't happen with normalized contacts, but handle for robustness)
+            const contactMethodsValue = contact.contactMethods as unknown;
+            if (
+              typeof contactMethodsValue === "string" &&
+              contactMethodsValue.trim() !== ""
+            ) {
+              // String that needs parsing
+              exContact.contactMethods = JSON.parse(contactMethodsValue);
+            } else {
+              // Invalid data, use empty array
+              exContact.contactMethods = [];
+            }
+          }
+        } else {
+          // No contactMethods, use empty array
+          exContact.contactMethods = [];
+        }
         return exContact;
       });