40 files changed, 151 insertions, 146 deletions

diff --git a/packages/main/src/i18n/I18nStore.ts b/packages/main/src/i18n/I18nStore.ts
index 8ea4430..4c77322 100644
--- a/packages/main/src/i18n/I18nStore.ts
+++ b/packages/main/src/i18n/I18nStore.ts
@@ -21,7 +21,7 @@
 import type { i18n, ResourceKey, TFunction } from 'i18next';
 import { IAtom, createAtom } from 'mobx';
 
-import getLogger from '../utils/getLogger';
+import getLogger from '../utils/getLogger.js';
 
 const log = getLogger('I18nStore');
 
diff --git a/packages/main/src/i18n/RepositoryBasedI18nBackend.ts b/packages/main/src/i18n/RepositoryBasedI18nBackend.ts
index 23f70d7..5b667d5 100644
--- a/packages/main/src/i18n/RepositoryBasedI18nBackend.ts
+++ b/packages/main/src/i18n/RepositoryBasedI18nBackend.ts
@@ -26,9 +26,9 @@ import type {
 } from 'i18next';
 import { debounce } from 'lodash-es';
 
-import getLogger from '../utils/getLogger';
+import getLogger from '../utils/getLogger.js';
 
-import type LocatlizationRepository from './LocalizationRepository';
+import type LocatlizationRepository from './LocalizationRepository.js';
 
 const MISSING_ENTRIES_DEBOUNCE_TIME_MS = 1000;
 
diff --git a/packages/main/src/i18n/i18nLog.ts b/packages/main/src/i18n/i18nLog.ts
index 308a1cc..94f6473 100644
--- a/packages/main/src/i18n/i18nLog.ts
+++ b/packages/main/src/i18n/i18nLog.ts
@@ -20,7 +20,7 @@
 
 import type { LoggerModule } from 'i18next';
 
-import getLogger from '../utils/getLogger';
+import getLogger from '../utils/getLogger.js';
 
 const log = getLogger('i18nLog');
 
diff --git a/packages/main/src/i18n/impl/LocaltizationFiles.ts b/packages/main/src/i18n/impl/LocaltizationFiles.ts
index 9cd854e..74e3ae3 100644
--- a/packages/main/src/i18n/impl/LocaltizationFiles.ts
+++ b/packages/main/src/i18n/impl/LocaltizationFiles.ts
@@ -22,10 +22,10 @@ import { readFile, writeFile } from 'node:fs/promises';
 
 import type { ResourceKey } from 'i18next';
 
-import type Resources from '../../infrastructure/resources/Resources';
-import getLogger from '../../utils/getLogger';
-import isErrno from '../../utils/isErrno';
-import type LocatlizationRepository from '../LocalizationRepository';
+import type Resources from '../../infrastructure/resources/Resources.js';
+import getLogger from '../../utils/getLogger.js';
+import isErrno from '../../utils/isErrno.js';
+import type LocatlizationRepository from '../LocalizationRepository.js';
 
 const log = getLogger('LocalizationFiles');
 
diff --git a/packages/main/src/i18n/loadLocalization.ts b/packages/main/src/i18n/loadLocalization.ts
index e62b3e3..19da9e2 100644
--- a/packages/main/src/i18n/loadLocalization.ts
+++ b/packages/main/src/i18n/loadLocalization.ts
@@ -23,13 +23,13 @@ import i18next, { i18n } from 'i18next';
 import { reaction } from 'mobx';
 import { addDisposer } from 'mobx-state-tree';
 
-import type MainStore from '../stores/MainStore';
-import getLogger from '../utils/getLogger';
+import type MainStore from '../stores/MainStore.js';
+import getLogger from '../utils/getLogger.js';
 
-import I18nStore from './I18nStore';
-import type LocatlizationRepository from './LocalizationRepository';
-import RepositoryBasedI18nBackend from './RepositoryBasedI18nBackend';
-import i18nLog from './i18nLog';
+import I18nStore from './I18nStore.js';
+import type LocatlizationRepository from './LocalizationRepository.js';
+import RepositoryBasedI18nBackend from './RepositoryBasedI18nBackend.js';
+import i18nLog from './i18nLog.js';
 
 const log = getLogger('loadLocationzation');
 
diff --git a/packages/main/src/index.ts b/packages/main/src/index.ts
index 3494f25..3496212 100644
--- a/packages/main/src/index.ts
+++ b/packages/main/src/index.ts
@@ -23,11 +23,11 @@ import os from 'node:os';
 
 import { app } from 'electron';
 
-import { enableStacktraceSourceMaps } from './infrastructure/electron/impl/devTools';
-import electronShell from './infrastructure/electron/impl/electronShell';
-import initReactions from './initReactions';
-import MainStore from './stores/MainStore';
-import getLogger from './utils/getLogger';
+import { enableStacktraceSourceMaps } from './infrastructure/electron/impl/devTools.js';
+import electronShell from './infrastructure/electron/impl/electronShell.js';
+import initReactions from './initReactions.js';
+import MainStore from './stores/MainStore.js';
+import getLogger from './utils/getLogger.js';
 
 const isDevelopment = import.meta.env.MODE === 'development';
 
diff --git a/packages/main/src/infrastructure/config/ConfigRepository.ts b/packages/main/src/infrastructure/config/ConfigRepository.ts
index 67bffb0..7d5e12b 100644
--- a/packages/main/src/infrastructure/config/ConfigRepository.ts
+++ b/packages/main/src/infrastructure/config/ConfigRepository.ts
@@ -18,7 +18,7 @@
  * SPDX-License-Identifier: AGPL-3.0-only
  */
 
-import type Disposer from '../../utils/Disposer';
+import type Disposer from '../../utils/Disposer.js';
 
 export type ReadConfigResult =
   | { found: true; contents: string }
diff --git a/packages/main/src/infrastructure/config/impl/ConfigFile.ts b/packages/main/src/infrastructure/config/impl/ConfigFile.ts
index 6203c89..684a827 100644
--- a/packages/main/src/infrastructure/config/impl/ConfigFile.ts
+++ b/packages/main/src/infrastructure/config/impl/ConfigFile.ts
@@ -24,11 +24,11 @@ import path from 'node:path';
 
 import { throttle } from 'lodash-es';
 
-import type Disposer from '../../../utils/Disposer';
-import getLogger from '../../../utils/getLogger';
-import isErrno from '../../../utils/isErrno';
-import type ConfigRepository from '../ConfigRepository';
-import type { ReadConfigResult } from '../ConfigRepository';
+import type Disposer from '../../../utils/Disposer.js';
+import getLogger from '../../../utils/getLogger.js';
+import isErrno from '../../../utils/isErrno.js';
+import type ConfigRepository from '../ConfigRepository.js';
+import type { ReadConfigResult } from '../ConfigRepository.js';
 
 const log = getLogger('ConfigFile');
 
diff --git a/packages/main/src/infrastructure/electron/RendererBridge.ts b/packages/main/src/infrastructure/electron/RendererBridge.ts
index 097580a..921f09a 100644
--- a/packages/main/src/infrastructure/electron/RendererBridge.ts
+++ b/packages/main/src/infrastructure/electron/RendererBridge.ts
@@ -26,8 +26,8 @@ import {
   onPatch,
 } from 'mobx-state-tree';
 
-import type MainStore from '../../stores/MainStore';
-import Disposer from '../../utils/Disposer';
+import type MainStore from '../../stores/MainStore.js';
+import Disposer from '../../utils/Disposer.js';
 
 export type PatchListener = (patch: IJsonPatch[]) => void;
 
diff --git a/packages/main/src/infrastructure/electron/__tests__/RendererBridge.test.ts b/packages/main/src/infrastructure/electron/__tests__/RendererBridge.test.ts
index b7c8a76..e29429d 100644
--- a/packages/main/src/infrastructure/electron/__tests__/RendererBridge.test.ts
+++ b/packages/main/src/infrastructure/electron/__tests__/RendererBridge.test.ts
@@ -30,8 +30,8 @@ import {
   unprotect,
 } from 'mobx-state-tree';
 
-import MainStore from '../../../stores/MainStore';
-import RendererBridge, { type PatchListener } from '../RendererBridge';
+import MainStore from '../../../stores/MainStore.js';
+import RendererBridge, { type PatchListener } from '../RendererBridge.js';
 
 const TestStore = MainStore.actions((theSelf) => ({
   /**
diff --git a/packages/main/src/infrastructure/electron/__tests__/UserAgents.test.ts b/packages/main/src/infrastructure/electron/__tests__/UserAgents.test.ts
index d963704..0c6dd1c 100644
--- a/packages/main/src/infrastructure/electron/__tests__/UserAgents.test.ts
+++ b/packages/main/src/infrastructure/electron/__tests__/UserAgents.test.ts
@@ -18,7 +18,7 @@
  * SPDX-License-Identifier: AGPL-3.0-only
  */
 
-import UserAgents from '../UserAgents';
+import UserAgents from '../UserAgents.js';
 
 let userAgents: UserAgents;
 
diff --git a/packages/main/src/infrastructure/electron/impl/ElectronMainWindow.ts b/packages/main/src/infrastructure/electron/impl/ElectronMainWindow.ts
index 20a1f70..c4b3823 100644
--- a/packages/main/src/infrastructure/electron/impl/ElectronMainWindow.ts
+++ b/packages/main/src/infrastructure/electron/impl/ElectronMainWindow.ts
@@ -27,15 +27,15 @@ import {
 import { BrowserWindow, ipcMain, IpcMainEvent } from 'electron';
 import type { IJsonPatch } from 'mobx-state-tree';
 
-import type MainStore from '../../../stores/MainStore';
-import getLogger from '../../../utils/getLogger';
-import RendererBridge from '../RendererBridge';
-import type { MainWindow, ServiceView } from '../types';
-
-import ElectronServiceView from './ElectronServiceView';
-import type ElectronViewFactory from './ElectronViewFactory';
-import { openDevToolsWhenReady } from './devTools';
-import lockWebContentsToFile from './lockWebContentsToFile';
+import type MainStore from '../../../stores/MainStore.js';
+import getLogger from '../../../utils/getLogger.js';
+import RendererBridge from '../RendererBridge.js';
+import type { MainWindow, ServiceView } from '../types.js';
+
+import ElectronServiceView from './ElectronServiceView.js';
+import type ElectronViewFactory from './ElectronViewFactory.js';
+import { openDevToolsWhenReady } from './devTools.js';
+import lockWebContentsToFile from './lockWebContentsToFile.js';
 
 const log = getLogger('ElectronMainWindow');
 
diff --git a/packages/main/src/infrastructure/electron/impl/ElectronPartition.ts b/packages/main/src/infrastructure/electron/impl/ElectronPartition.ts
index e60ce21..d1220c5 100644
--- a/packages/main/src/infrastructure/electron/impl/ElectronPartition.ts
+++ b/packages/main/src/infrastructure/electron/impl/ElectronPartition.ts
@@ -20,10 +20,10 @@
 
 import { Session, session } from 'electron';
 
-import type Profile from '../../../stores/Profile';
-import type { Partition } from '../types';
+import type Profile from '../../../stores/Profile.js';
+import type { Partition } from '../types.js';
 
-import type ElectronViewFactory from './ElectronViewFactory';
+import type ElectronViewFactory from './ElectronViewFactory.js';
 
 export default class ElectronPartition implements Partition {
   readonly id: string;
diff --git a/packages/main/src/infrastructure/electron/impl/ElectronServiceView.ts b/packages/main/src/infrastructure/electron/impl/ElectronServiceView.ts
index a9298bd..91247c8 100644
--- a/packages/main/src/infrastructure/electron/impl/ElectronServiceView.ts
+++ b/packages/main/src/infrastructure/electron/impl/ElectronServiceView.ts
@@ -20,13 +20,13 @@
 
 import { BrowserView } from 'electron';
 
-import type Service from '../../../stores/Service';
-import getLogger from '../../../utils/getLogger';
-import type Resources from '../../resources/Resources';
-import type { ServiceView } from '../types';
+import type Service from '../../../stores/Service.js';
+import getLogger from '../../../utils/getLogger.js';
+import type Resources from '../../resources/Resources.js';
+import type { ServiceView } from '../types.js';
 
-import ElectronPartition from './ElectronPartition';
-import type ElectronViewFactory from './ElectronViewFactory';
+import ElectronPartition from './ElectronPartition.js';
+import type ElectronViewFactory from './ElectronViewFactory.js';
 
 const log = getLogger('ElectronServiceView');
 
diff --git a/packages/main/src/infrastructure/electron/impl/ElectronViewFactory.ts b/packages/main/src/infrastructure/electron/impl/ElectronViewFactory.ts
index c72860d..df3de85 100644
--- a/packages/main/src/infrastructure/electron/impl/ElectronViewFactory.ts
+++ b/packages/main/src/infrastructure/electron/impl/ElectronViewFactory.ts
@@ -18,16 +18,21 @@
  * SPDX-License-Identifier: AGPL-3.0-only
  */
 
-import type MainStore from '../../../stores/MainStore';
-import type Profile from '../../../stores/Profile';
-import type Service from '../../../stores/Service';
-import type Resources from '../../resources/Resources';
-import type UserAgents from '../UserAgents';
-import type { MainWindow, Partition, ServiceView, ViewFactory } from '../types';
+import type MainStore from '../../../stores/MainStore.js';
+import type Profile from '../../../stores/Profile.js';
+import type Service from '../../../stores/Service.js';
+import type Resources from '../../resources/Resources.js';
+import type UserAgents from '../UserAgents.js';
+import type {
+  MainWindow,
+  Partition,
+  ServiceView,
+  ViewFactory,
+} from '../types.js';
 
-import ElectronMainWindow from './ElectronMainWindow';
-import ElectronPartition from './ElectronPartition';
-import ElectronServiceView from './ElectronServiceView';
+import ElectronMainWindow from './ElectronMainWindow.js';
+import ElectronPartition from './ElectronPartition.js';
+import ElectronServiceView from './ElectronServiceView.js';
 
 export default class ElectronViewFactory implements ViewFactory {
   private readonly webContentsIdToServiceView = new Map<
diff --git a/packages/main/src/infrastructure/electron/impl/__tests__/electron.integ.test.ts b/packages/main/src/infrastructure/electron/impl/__tests__/electron.integ.test.ts
index 67cf689..75b12ac 100644
--- a/packages/main/src/infrastructure/electron/impl/__tests__/electron.integ.test.ts
+++ b/packages/main/src/infrastructure/electron/impl/__tests__/electron.integ.test.ts
@@ -1,6 +1,6 @@
 import { BrowserWindow } from 'electron';
 
-import '../ElectronMainWindow';
+import '../ElectronMainWindow.js';
 
 test('create a BrowserWindow', async () => {
   const w = new BrowserWindow();
diff --git a/packages/main/src/infrastructure/electron/impl/__tests__/hardenSession.test.ts b/packages/main/src/infrastructure/electron/impl/__tests__/hardenSession.test.ts
index 7b70d10..bbbd675 100644
--- a/packages/main/src/infrastructure/electron/impl/__tests__/hardenSession.test.ts
+++ b/packages/main/src/infrastructure/electron/impl/__tests__/hardenSession.test.ts
@@ -30,8 +30,8 @@ import type {
   WebContents,
 } from 'electron';
 
-import type Resources from '../../../resources/Resources';
-import hardenSession from '../hardenSession';
+import type Resources from '../../../resources/Resources.js';
+import hardenSession from '../hardenSession.js';
 
 const permissions = [
   'clipboard-read',
diff --git a/packages/main/src/infrastructure/electron/impl/__tests__/lockWebContentsToFile.test.ts b/packages/main/src/infrastructure/electron/impl/__tests__/lockWebContentsToFile.test.ts
index 47525d3..6332db7 100644
--- a/packages/main/src/infrastructure/electron/impl/__tests__/lockWebContentsToFile.test.ts
+++ b/packages/main/src/infrastructure/electron/impl/__tests__/lockWebContentsToFile.test.ts
@@ -25,8 +25,8 @@ import { fake } from '@sophie/test-utils';
 import type { Event, HandlerDetails, WebContents } from 'electron';
 import { mocked } from 'jest-mock';
 
-import type Resources from '../../../resources/Resources';
-import lockWebContentsToFile from '../lockWebContentsToFile';
+import type Resources from '../../../resources/Resources.js';
+import lockWebContentsToFile from '../lockWebContentsToFile.js';
 
 type WillNavigateHandler = (event: Event, url: string) => void;
 
diff --git a/packages/main/src/infrastructure/electron/impl/electronShell.ts b/packages/main/src/infrastructure/electron/impl/electronShell.ts
index f7f7001..da246c0 100644
--- a/packages/main/src/infrastructure/electron/impl/electronShell.ts
+++ b/packages/main/src/infrastructure/electron/impl/electronShell.ts
@@ -23,7 +23,7 @@ import { writeFile } from 'node:fs/promises';
 import { app, dialog, shell } from 'electron';
 import { getLogger } from 'loglevel';
 
-import type MainEnv from '../../../stores/MainEnv';
+import type MainEnv from '../../../stores/MainEnv.js';
 
 const log = getLogger('ElectronShell');
 
diff --git a/packages/main/src/infrastructure/electron/impl/hardenSession.ts b/packages/main/src/infrastructure/electron/impl/hardenSession.ts
index fc358a1..0574146 100644
--- a/packages/main/src/infrastructure/electron/impl/hardenSession.ts
+++ b/packages/main/src/infrastructure/electron/impl/hardenSession.ts
@@ -22,8 +22,8 @@ import { URL } from 'node:url';
 
 import type { Session } from 'electron';
 
-import getLogger from '../../../utils/getLogger';
-import type Resources from '../../resources/Resources';
+import getLogger from '../../../utils/getLogger.js';
+import type Resources from '../../resources/Resources.js';
 
 /**
  * URL prefixes Sophie is allowed load in dev mode.
diff --git a/packages/main/src/infrastructure/electron/impl/lockWebContentsToFile.ts b/packages/main/src/infrastructure/electron/impl/lockWebContentsToFile.ts
index da40a56..338c845 100644
--- a/packages/main/src/infrastructure/electron/impl/lockWebContentsToFile.ts
+++ b/packages/main/src/infrastructure/electron/impl/lockWebContentsToFile.ts
@@ -20,9 +20,9 @@
 
 import type { WebContents } from 'electron';
 
-import getLogger from '../../../utils/getLogger';
-import isErrno from '../../../utils/isErrno';
-import type Resources from '../../resources/Resources';
+import getLogger from '../../../utils/getLogger.js';
+import isErrno from '../../../utils/isErrno.js';
+import type Resources from '../../resources/Resources.js';
 
 const log = getLogger('lockWebContentsToFile');
 
diff --git a/packages/main/src/infrastructure/electron/impl/setApplicationMenu.ts b/packages/main/src/infrastructure/electron/impl/setApplicationMenu.ts
index 32b2d4d..7e45401 100644
--- a/packages/main/src/infrastructure/electron/impl/setApplicationMenu.ts
+++ b/packages/main/src/infrastructure/electron/impl/setApplicationMenu.ts
@@ -22,7 +22,7 @@ import { Menu, MenuItemConstructorOptions } from 'electron';
 import { autorun } from 'mobx';
 import { addDisposer } from 'mobx-state-tree';
 
-import type MainStore from '../../../stores/MainStore';
+import type MainStore from '../../../stores/MainStore.js';
 
 export default function setApplicationMenu(
   store: MainStore,
diff --git a/packages/main/src/infrastructure/electron/types.ts b/packages/main/src/infrastructure/electron/types.ts
index 92ca9ad..608a342 100644
--- a/packages/main/src/infrastructure/electron/types.ts
+++ b/packages/main/src/infrastructure/electron/types.ts
@@ -18,9 +18,9 @@
  * SPDX-License-Identifier: AGPL-3.0-only
  */
 
-import type MainStore from '../../stores/MainStore';
-import type Profile from '../../stores/Profile';
-import type Service from '../../stores/Service';
+import type MainStore from '../../stores/MainStore.js';
+import type Profile from '../../stores/Profile.js';
+import type Service from '../../stores/Service.js';
 
 export interface ViewFactory {
   createMainWindow(store: MainStore): Promise<MainWindow>;
diff --git a/packages/main/src/infrastructure/resources/impl/__tests__/getDistResources.test.ts b/packages/main/src/infrastructure/resources/impl/__tests__/getDistResources.test.ts
index 649536b..c7c6e22 100644
--- a/packages/main/src/infrastructure/resources/impl/__tests__/getDistResources.test.ts
+++ b/packages/main/src/infrastructure/resources/impl/__tests__/getDistResources.test.ts
@@ -20,8 +20,8 @@
 
 import os from 'node:os';
 
-import Resources from '../../Resources';
-import getDistResources from '../getDistResources';
+import Resources from '../../Resources.js';
+import getDistResources from '../getDistResources.js';
 
 const defaultDevServerURL = 'http://localhost:3000/';
 
diff --git a/packages/main/src/infrastructure/resources/impl/getDistResources.ts b/packages/main/src/infrastructure/resources/impl/getDistResources.ts
index 3c1ffb3..3b7827c 100644
--- a/packages/main/src/infrastructure/resources/impl/getDistResources.ts
+++ b/packages/main/src/infrastructure/resources/impl/getDistResources.ts
@@ -21,7 +21,7 @@
 import path from 'node:path';
 import { pathToFileURL, URL } from 'node:url';
 
-import Resources from '../Resources';
+import Resources from '../Resources.js';
 
 export default function getDistResources(
   devMode: boolean,
diff --git a/packages/main/src/initReactions.ts b/packages/main/src/initReactions.ts
index 05bc205..cbc0265 100644
--- a/packages/main/src/initReactions.ts
+++ b/packages/main/src/initReactions.ts
@@ -20,20 +20,20 @@
 
 import { app, session } from 'electron';
 
-import LocalizationFiles from './i18n/impl/LocaltizationFiles';
-import loadLocalization from './i18n/loadLocalization';
-import ConfigFile from './infrastructure/config/impl/ConfigFile';
-import UserAgents from './infrastructure/electron/UserAgents';
-import ElectronViewFactory from './infrastructure/electron/impl/ElectronViewFactory';
-import { installDevToolsExtensions } from './infrastructure/electron/impl/devTools';
-import hardenSession from './infrastructure/electron/impl/hardenSession';
-import setApplicationMenu from './infrastructure/electron/impl/setApplicationMenu';
-import getDistResources from './infrastructure/resources/impl/getDistResources';
-import loadServices from './reactions/loadServices';
-import synchronizeConfig from './reactions/synchronizeConfig';
-import synchronizeNativeTheme from './reactions/synchronizeNativeTheme';
-import type MainStore from './stores/MainStore';
-import type Disposer from './utils/Disposer';
+import LocalizationFiles from './i18n/impl/LocaltizationFiles.js';
+import loadLocalization from './i18n/loadLocalization.js';
+import ConfigFile from './infrastructure/config/impl/ConfigFile.js';
+import UserAgents from './infrastructure/electron/UserAgents.js';
+import ElectronViewFactory from './infrastructure/electron/impl/ElectronViewFactory.js';
+import { installDevToolsExtensions } from './infrastructure/electron/impl/devTools.js';
+import hardenSession from './infrastructure/electron/impl/hardenSession.js';
+import setApplicationMenu from './infrastructure/electron/impl/setApplicationMenu.js';
+import getDistResources from './infrastructure/resources/impl/getDistResources.js';
+import loadServices from './reactions/loadServices.js';
+import synchronizeConfig from './reactions/synchronizeConfig.js';
+import synchronizeNativeTheme from './reactions/synchronizeNativeTheme.js';
+import type MainStore from './stores/MainStore.js';
+import type Disposer from './utils/Disposer.js';
 
 export default async function initReactions(
   store: MainStore,
diff --git a/packages/main/src/reactions/__tests__/synchronizeConfig.test.ts b/packages/main/src/reactions/__tests__/synchronizeConfig.test.ts
index f0e88c1..d4d8abf 100644
--- a/packages/main/src/reactions/__tests__/synchronizeConfig.test.ts
+++ b/packages/main/src/reactions/__tests__/synchronizeConfig.test.ts
@@ -21,10 +21,10 @@
 import { jest } from '@jest/globals';
 import { mocked } from 'jest-mock';
 
-import type ConfigRepository from '../../infrastructure/config/ConfigRepository';
-import SharedStore from '../../stores/SharedStore';
-import type Disposer from '../../utils/Disposer';
-import synchronizeConfig, { serializeConfig } from '../synchronizeConfig';
+import type ConfigRepository from '../../infrastructure/config/ConfigRepository.js';
+import SharedStore from '../../stores/SharedStore.js';
+import type Disposer from '../../utils/Disposer.js';
+import synchronizeConfig, { serializeConfig } from '../synchronizeConfig.js';
 
 let store: SharedStore;
 const repository: ConfigRepository = {
diff --git a/packages/main/src/reactions/__tests__/synchronizeNativeTheme.test.ts b/packages/main/src/reactions/__tests__/synchronizeNativeTheme.test.ts
index 05f14fb..c89f989 100644
--- a/packages/main/src/reactions/__tests__/synchronizeNativeTheme.test.ts
+++ b/packages/main/src/reactions/__tests__/synchronizeNativeTheme.test.ts
@@ -21,8 +21,8 @@
 import { jest } from '@jest/globals';
 import { mocked } from 'jest-mock';
 
-import SharedStore from '../../stores/SharedStore';
-import type Disposer from '../../utils/Disposer';
+import SharedStore from '../../stores/SharedStore.js';
+import type Disposer from '../../utils/Disposer.js';
 
 let shouldUseDarkColors = false;
 
@@ -39,7 +39,7 @@ jest.unstable_mockModule('electron', () => ({
 
 const { nativeTheme } = await import('electron');
 const { default: synchronizeNativeTheme } = await import(
-  '../synchronizeNativeTheme'
+  '../synchronizeNativeTheme.js'
 );
 
 let store: SharedStore;
diff --git a/packages/main/src/reactions/loadServices.ts b/packages/main/src/reactions/loadServices.ts
index 50fd2cb..1325a36 100644
--- a/packages/main/src/reactions/loadServices.ts
+++ b/packages/main/src/reactions/loadServices.ts
@@ -26,10 +26,10 @@ import type {
   Partition,
   ServiceView,
   ViewFactory,
-} from '../infrastructure/electron/types';
-import type MainStore from '../stores/MainStore';
-import type Service from '../stores/Service';
-import getLogger from '../utils/getLogger';
+} from '../infrastructure/electron/types.js';
+import type MainStore from '../stores/MainStore.js';
+import type Service from '../stores/Service.js';
+import getLogger from '../utils/getLogger.js';
 
 const log = getLogger('loadServices');
 
diff --git a/packages/main/src/reactions/synchronizeConfig.ts b/packages/main/src/reactions/synchronizeConfig.ts
index 5fe924a..f3c8b4a 100644
--- a/packages/main/src/reactions/synchronizeConfig.ts
+++ b/packages/main/src/reactions/synchronizeConfig.ts
@@ -21,11 +21,11 @@
 import { debounce } from 'lodash-es';
 import { reaction } from 'mobx';
 
-import type ConfigRepository from '../infrastructure/config/ConfigRepository';
-import type SharedStore from '../stores/SharedStore';
-import type Config from '../stores/config/Config';
-import type Disposer from '../utils/Disposer';
-import getLogger from '../utils/getLogger';
+import type ConfigRepository from '../infrastructure/config/ConfigRepository.js';
+import type SharedStore from '../stores/SharedStore.js';
+import type Config from '../stores/config/Config.js';
+import type Disposer from '../utils/Disposer.js';
+import getLogger from '../utils/getLogger.js';
 
 const DEFAULT_CONFIG_DEBOUNCE_TIME_MS = 1000;
 
diff --git a/packages/main/src/reactions/synchronizeNativeTheme.ts b/packages/main/src/reactions/synchronizeNativeTheme.ts
index 384d54d..10d5f69 100644
--- a/packages/main/src/reactions/synchronizeNativeTheme.ts
+++ b/packages/main/src/reactions/synchronizeNativeTheme.ts
@@ -21,9 +21,9 @@
 import { nativeTheme } from 'electron';
 import { autorun } from 'mobx';
 
-import type SharedStore from '../stores/SharedStore';
-import type Disposer from '../utils/Disposer';
-import getLogger from '../utils/getLogger';
+import type SharedStore from '../stores/SharedStore.js';
+import type Disposer from '../utils/Disposer.js';
+import getLogger from '../utils/getLogger.js';
 
 const log = getLogger('synchronizeNativeTheme');
 
diff --git a/packages/main/src/stores/GlobalSettings.ts b/packages/main/src/stores/GlobalSettings.ts
index 84248ea..9ebc1b1 100644
--- a/packages/main/src/stores/GlobalSettings.ts
+++ b/packages/main/src/stores/GlobalSettings.ts
@@ -21,9 +21,9 @@
 import { defineGlobalSettingsModel, ThemeSource } from '@sophie/shared';
 import { Instance, resolveIdentifier } from 'mobx-state-tree';
 
-import getLogger from '../utils/getLogger';
+import getLogger from '../utils/getLogger.js';
 
-import Service from './Service';
+import Service from './Service.js';
 
 const log = getLogger('sharedStore');
 
diff --git a/packages/main/src/stores/MainStore.ts b/packages/main/src/stores/MainStore.ts
index b3e2830..1abd20c 100644
--- a/packages/main/src/stores/MainStore.ts
+++ b/packages/main/src/stores/MainStore.ts
@@ -22,16 +22,16 @@ import type { Action } from '@sophie/shared';
 import type { ResourceKey } from 'i18next';
 import { flow, Instance, types } from 'mobx-state-tree';
 
-import type I18nStore from '../i18n/I18nStore';
-import type { UseTranslationResult } from '../i18n/I18nStore';
-import type { MainWindow } from '../infrastructure/electron/types';
-import getLogger from '../utils/getLogger';
+import type I18nStore from '../i18n/I18nStore.js';
+import type { UseTranslationResult } from '../i18n/I18nStore.js';
+import type { MainWindow } from '../infrastructure/electron/types.js';
+import getLogger from '../utils/getLogger.js';
 
-import GlobalSettings from './GlobalSettings';
-import { getEnv } from './MainEnv';
-import Profile from './Profile';
-import Service from './Service';
-import SharedStore from './SharedStore';
+import GlobalSettings from './GlobalSettings.js';
+import { getEnv } from './MainEnv.js';
+import Profile from './Profile.js';
+import Service from './Service.js';
+import SharedStore from './SharedStore.js';
 
 const log = getLogger('MainStore');
 
diff --git a/packages/main/src/stores/Profile.ts b/packages/main/src/stores/Profile.ts
index 405a5d4..b4343a0 100644
--- a/packages/main/src/stores/Profile.ts
+++ b/packages/main/src/stores/Profile.ts
@@ -21,7 +21,7 @@
 import { Certificate, Profile as ProfileBase } from '@sophie/shared';
 import { clone, getSnapshot, Instance } from 'mobx-state-tree';
 
-import type ProfileConfig from './config/ProfileConfig';
+import type ProfileConfig from './config/ProfileConfig.js';
 
 const Profile = ProfileBase.views((self) => ({
   get config(): ProfileConfig {
diff --git a/packages/main/src/stores/Service.ts b/packages/main/src/stores/Service.ts
index 9256f65..3b7d0b2 100644
--- a/packages/main/src/stores/Service.ts
+++ b/packages/main/src/stores/Service.ts
@@ -29,12 +29,12 @@ import {
 } from '@sophie/shared';
 import { type Instance, getSnapshot, cast, flow } from 'mobx-state-tree';
 
-import type { ServiceView } from '../infrastructure/electron/types';
-import getLogger from '../utils/getLogger';
+import type { ServiceView } from '../infrastructure/electron/types.js';
+import getLogger from '../utils/getLogger.js';
 
-import { getEnv } from './MainEnv';
-import ServiceSettings from './ServiceSettings';
-import type ServiceConfig from './config/ServiceConfig';
+import { getEnv } from './MainEnv.js';
+import ServiceSettings from './ServiceSettings.js';
+import type ServiceConfig from './config/ServiceConfig.js';
 
 const log = getLogger('Service');
 
diff --git a/packages/main/src/stores/ServiceSettings.ts b/packages/main/src/stores/ServiceSettings.ts
index 5d37347..d5c2843 100644
--- a/packages/main/src/stores/ServiceSettings.ts
+++ b/packages/main/src/stores/ServiceSettings.ts
@@ -21,7 +21,7 @@
 import { defineServiceSettingsModel } from '@sophie/shared';
 import { Instance } from 'mobx-state-tree';
 
-import Profile from './Profile';
+import Profile from './Profile.js';
 
 const ServiceSettings = defineServiceSettingsModel(Profile);
 
diff --git a/packages/main/src/stores/SharedStore.ts b/packages/main/src/stores/SharedStore.ts
index f93c3d4..e1c2d3c 100644
--- a/packages/main/src/stores/SharedStore.ts
+++ b/packages/main/src/stores/SharedStore.ts
@@ -21,13 +21,13 @@
 import { defineSharedStoreModel, WritingDirection } from '@sophie/shared';
 import { getSnapshot, Instance } from 'mobx-state-tree';
 
-import getLogger from '../utils/getLogger';
+import getLogger from '../utils/getLogger.js';
 
-import GlobalSettings from './GlobalSettings';
-import Profile from './Profile';
-import Service from './Service';
-import type Config from './config/Config';
-import loadConfig from './config/loadConfig';
+import GlobalSettings from './GlobalSettings.js';
+import Profile from './Profile.js';
+import Service from './Service.js';
+import type Config from './config/Config.js';
+import loadConfig from './config/loadConfig.js';
 
 const log = getLogger('SharedStore');
 
diff --git a/packages/main/src/stores/__tests__/SharedStore.test.ts b/packages/main/src/stores/__tests__/SharedStore.test.ts
index 0ed63e3..78396da 100644
--- a/packages/main/src/stores/__tests__/SharedStore.test.ts
+++ b/packages/main/src/stores/__tests__/SharedStore.test.ts
@@ -18,10 +18,10 @@
  * SPDX-License-Identifier: AGPL-3.0-only
  */
 
-import SharedStore from '../SharedStore';
-import type Config from '../config/Config';
-import type ProfileConfig from '../config/ProfileConfig';
-import type ServiceConfig from '../config/ServiceConfig';
+import SharedStore from '../SharedStore.js';
+import type Config from '../config/Config.js';
+import type ProfileConfig from '../config/ProfileConfig.js';
+import type ServiceConfig from '../config/ServiceConfig.js';
 
 const profileProps: ProfileConfig = {
   name: 'Test profile',
diff --git a/packages/main/src/stores/config/Config.ts b/packages/main/src/stores/config/Config.ts
index c38e3c5..adb10a6 100644
--- a/packages/main/src/stores/config/Config.ts
+++ b/packages/main/src/stores/config/Config.ts
@@ -18,10 +18,10 @@
  * SPDX-License-Identifier: AGPL-3.0-only
  */
 
-import type { GlobalSettingsSnapshotIn } from '../GlobalSettings';
+import type { GlobalSettingsSnapshotIn } from '../GlobalSettings.js';
 
-import type ProfileConfig from './ProfileConfig';
-import type ServiceConfig from './ServiceConfig';
+import type ProfileConfig from './ProfileConfig.js';
+import type ServiceConfig from './ServiceConfig.js';
 
 export default interface Config extends GlobalSettingsSnapshotIn {
   profiles?: ProfileConfig[] | undefined;
diff --git a/packages/main/src/stores/config/loadConfig.ts b/packages/main/src/stores/config/loadConfig.ts
index 2463084..8a1adcb 100644
--- a/packages/main/src/stores/config/loadConfig.ts
+++ b/packages/main/src/stores/config/loadConfig.ts
@@ -30,14 +30,14 @@ import {
 import { nanoid } from 'nanoid';
 import slug from 'slug';
 
-import GlobalSettings from '../GlobalSettings';
-import type Profile from '../Profile';
-import type Service from '../Service';
-import type { ServiceSettingsSnapshotIn } from '../ServiceSettings';
+import GlobalSettings from '../GlobalSettings.js';
+import type Profile from '../Profile.js';
+import type Service from '../Service.js';
+import type { ServiceSettingsSnapshotIn } from '../ServiceSettings.js';
 
-import type Config from './Config';
-import type ProfileConfig from './ProfileConfig';
-import type ServiceConfig from './ServiceConfig';
+import type Config from './Config.js';
+import type ProfileConfig from './ProfileConfig.js';
+import type ServiceConfig from './ServiceConfig.js';
 
 function generateId(name?: string | undefined): string {
   const nameSlug = typeof name === 'undefined' ? '' : slug(name);