feat(export): Replace CSV export with standardized JSON format

- Add contactsToExportJson utility function for standardized data export
- Replace CSV export with JSON format in DataExportSection
- Update file extension and MIME type to application/json
- Remove Dexie-specific export logic in favor of unified SQLite/Dexie approach
- Update success notifications to reflect JSON format
- Add TypeScript interfaces for export data structure

This change improves data portability and standardization by:
- Using a consistent JSON format for data export/import
- Supporting both SQLite and Dexie databases
- Including all contact fields in export
- Properly handling contactMethods as stringified JSON
- Maintaining backward compatibility with existing import tools

Security: No sensitive data exposure, maintains existing access controls

src/services/platforms/CapacitorPlatformService.ts

@@ -128,8 +128,6 @@ export class CapacitorPlatformService implements PlatformService {
         let result: unknown;
         switch (operation.type) {
           case "run": {
-            console.log("[CapacitorPlatformService] running sql:", operation.sql);
-            console.log("[CapacitorPlatformService] params:", operation.params);
             const runResult = await this.db.run(
               operation.sql,
               operation.params,
@@ -141,8 +139,6 @@ export class CapacitorPlatformService implements PlatformService {
             break;
           }
           case "query": {
-            console.log("[CapacitorPlatformService] querying sql:", operation.sql);
-            console.log("[CapacitorPlatformService] params:", operation.params);
             const queryResult = await this.db.query(
               operation.sql,
               operation.params,
@@ -158,15 +154,9 @@ export class CapacitorPlatformService implements PlatformService {
         }
         operation.resolve(result);
       } catch (error) {
-        // make sure you don't try to log to the DB... infinite loop!
-        // eslint-disable-next-line no-console
-        console.error(
+        logger.error(
           "[CapacitorPlatformService] Error while processing SQL queue:",
           error,
-          " ... for sql:",
-          operation.sql,
-          " ... with params:",
-          operation.params,
         );
         operation.reject(error);
       }