Bugfix/fix activities import of files with extension in uppercase (#4596)

* Fix activities import of files with extension in uppercase

* Update changelog

CHANGELOG.md

@@ -5,6 +5,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## Unreleased
+
+### Fixed
+
+- Improved the file selector of the activities import functionality to accept case-insensitive file extensions (`.CSV` and `.JSON`)
+
 ## 2.155.0 - 2025-04-23
 
 ### Added

apps/client/src/app/pages/portfolio/activities/import-activities-dialog/import-activities-dialog.component.ts

@@ -247,9 +247,10 @@ export class ImportActivitiesDialog implements OnDestroy {
 
     reader.onload = async (readerEvent) => {
       const fileContent = readerEvent.target.result as string;
+      const fileExtension = file.name.split('.').pop()?.toLowerCase();
 
       try {
-        if (file.name.endsWith('.json')) {
+        if (fileExtension === 'json') {
           const content = JSON.parse(fileContent);
 
           this.accounts = content.accounts;
@@ -294,7 +295,7 @@ export class ImportActivitiesDialog implements OnDestroy {
           }
 
           return;
-        } else if (file.name.endsWith('.csv')) {
+        } else if (fileExtension === 'csv') {
           const content = fileContent.split('\n').slice(1);
 
           try {