diff --git a/app/common/dnd-util.ts b/app/common/dnd-util.ts
index 58fd849b..f563f76b 100644
--- a/app/common/dnd-util.ts
+++ b/app/common/dnd-util.ts
@@ -13,10 +13,10 @@ export type DndSettings = {
 
 type SettingName = keyof DndSettings;
 
-interface Toggle {
+type Toggle = {
   dnd: boolean;
   newSettings: Partial<DndSettings>;
-}
+};
 
 export function toggle(): Toggle {
   const dnd = !ConfigUtil.getConfigItem("dnd", false);
diff --git a/app/common/logger-util.ts b/app/common/logger-util.ts
index 27f638f4..9b35d388 100644
--- a/app/common/logger-util.ts
+++ b/app/common/logger-util.ts
@@ -6,9 +6,9 @@ import process from "node:process";
 import {initSetUp} from "./default-util";
 import {app} from "./remote";
 
-interface LoggerOptions {
+type LoggerOptions = {
   file?: string;
-}
+};
 
 initSetUp();
 
diff --git a/app/common/messages.ts b/app/common/messages.ts
index 1287ea7d..545b0991 100644
--- a/app/common/messages.ts
+++ b/app/common/messages.ts
@@ -1,7 +1,7 @@
-interface DialogBoxError {
+type DialogBoxError = {
   title: string;
   content: string;
-}
+};
 
 export function invalidZulipServerError(domain: string): string {
   return `${domain} does not appear to be a valid Zulip server. Make sure that
diff --git a/app/common/typed-ipc.ts b/app/common/typed-ipc.ts
index 329ec126..9e3fab1e 100644
--- a/app/common/typed-ipc.ts
+++ b/app/common/typed-ipc.ts
@@ -1,7 +1,7 @@
 import type {DndSettings} from "./dnd-util";
 import type {MenuProps, ServerConf} from "./types";
 
-export interface MainMessage {
+export type MainMessage = {
   "clear-app-settings": () => void;
   "configure-spell-checker": () => void;
   "fetch-user-agent": () => string;
@@ -22,15 +22,15 @@ export interface MainMessage {
   "update-badge": (messageCount: number) => void;
   "update-menu": (props: MenuProps) => void;
   "update-taskbar-icon": (data: string, text: string) => void;
-}
+};
 
-export interface MainCall {
+export type MainCall = {
   "get-server-settings": (domain: string) => ServerConf;
   "is-online": (url: string) => boolean;
   "save-server-icon": (iconURL: string) => string;
-}
+};
 
-export interface RendererMessage {
+export type RendererMessage = {
   back: () => void;
   "copy-zulip-url": () => void;
   destroytray: () => void;
@@ -79,4 +79,4 @@ export interface RendererMessage {
   zoomActualSize: () => void;
   zoomIn: () => void;
   zoomOut: () => void;
-}
+};
diff --git a/app/common/types.ts b/app/common/types.ts
index 8c0d5a49..35df103d 100644
--- a/app/common/types.ts
+++ b/app/common/types.ts
@@ -1,8 +1,8 @@
-export interface MenuProps {
+export type MenuProps = {
   tabs: TabData[];
   activeTabIndex?: number;
   enableMenu?: boolean;
-}
+};
 
 export type NavItem =
   | "General"
@@ -11,16 +11,16 @@ export type NavItem =
   | "Organizations"
   | "Shortcuts";
 
-export interface ServerConf {
+export type ServerConf = {
   url: string;
   alias: string;
   icon: string;
-}
+};
 
 export type TabRole = "server" | "function";
 
-export interface TabData {
+export type TabData = {
   role: TabRole;
   name: string;
   index: number;
-}
+};
diff --git a/app/renderer/js/clipboard-decrypter.ts b/app/renderer/js/clipboard-decrypter.ts
index 141e456d..f0166d58 100644
--- a/app/renderer/js/clipboard-decrypter.ts
+++ b/app/renderer/js/clipboard-decrypter.ts
@@ -16,11 +16,11 @@ import crypto from "node:crypto";
 // don’t leak anything from the user’s clipboard other than the token
 // intended for us.
 
-export interface ClipboardDecrypter {
+export type ClipboardDecrypter = {
   version: number;
   key: Uint8Array;
   pasted: Promise<string>;
-}
+};
 
 export class ClipboardDecrypterImpl implements ClipboardDecrypter {
   version: number;
diff --git a/app/renderer/js/components/functional-tab.ts b/app/renderer/js/components/functional-tab.ts
index c67964c2..0c22468a 100644
--- a/app/renderer/js/components/functional-tab.ts
+++ b/app/renderer/js/components/functional-tab.ts
@@ -5,9 +5,9 @@ import {generateNodeFromHtml} from "./base";
 import type {TabProps} from "./tab";
 import Tab from "./tab";
 
-export interface FunctionalTabProps extends TabProps {
+export type FunctionalTabProps = {
   $view: Element;
-}
+} & TabProps;
 
 export default class FunctionalTab extends Tab {
   $view: Element;
diff --git a/app/renderer/js/components/server-tab.ts b/app/renderer/js/components/server-tab.ts
index 8a3d170b..b5ffdcef 100644
--- a/app/renderer/js/components/server-tab.ts
+++ b/app/renderer/js/components/server-tab.ts
@@ -9,9 +9,9 @@ import type {TabProps} from "./tab";
 import Tab from "./tab";
 import type WebView from "./webview";
 
-export interface ServerTabProps extends TabProps {
+export type ServerTabProps = {
   webview: Promise<WebView>;
-}
+} & TabProps;
 
 export default class ServerTab extends Tab {
   webview: Promise<WebView>;
diff --git a/app/renderer/js/components/tab.ts b/app/renderer/js/components/tab.ts
index dc0bcfab..72d4cc75 100644
--- a/app/renderer/js/components/tab.ts
+++ b/app/renderer/js/components/tab.ts
@@ -1,6 +1,6 @@
 import type {TabRole} from "../../../common/types";
 
-export interface TabProps {
+export type TabProps = {
   role: TabRole;
   icon?: string;
   name: string;
@@ -12,7 +12,7 @@ export interface TabProps {
   onHoverOut?: () => void;
   materialIcon?: string;
   onDestroy?: () => void;
-}
+};
 
 export default abstract class Tab {
   abstract $el: Element;
diff --git a/app/renderer/js/components/webview.ts b/app/renderer/js/components/webview.ts
index 8e574a93..5cc6dbd3 100644
--- a/app/renderer/js/components/webview.ts
+++ b/app/renderer/js/components/webview.ts
@@ -19,7 +19,7 @@ import {contextMenu} from "./context-menu";
 
 const shouldSilentWebview = ConfigUtil.getConfigItem("silent", false);
 
-interface WebViewProps {
+type WebViewProps = {
   $root: Element;
   rootWebContents: WebContents;
   index: number;
@@ -32,7 +32,7 @@ interface WebViewProps {
   preload?: string;
   onTitleChange: () => void;
   hasPermission?: (origin: string, permission: string) => boolean;
-}
+};
 
 export default class WebView {
   static templateHtml(props: WebViewProps): Html {
diff --git a/app/renderer/js/electron-bridge.ts b/app/renderer/js/electron-bridge.ts
index 6635bec7..4dc70c4c 100644
--- a/app/renderer/js/electron-bridge.ts
+++ b/app/renderer/js/electron-bridge.ts
@@ -8,7 +8,7 @@ import {ipcRenderer} from "./typed-ipc-renderer";
 
 type ListenerType = (...args: any[]) => void;
 
-export interface ElectronBridge {
+export type ElectronBridge = {
   send_event: (eventName: string | symbol, ...args: unknown[]) => boolean;
   on_event: (eventName: string, listener: ListenerType) => void;
   new_notification: (
@@ -21,7 +21,7 @@ export interface ElectronBridge {
   get_send_notification_reply_message_supported: () => boolean;
   set_send_notification_reply_message_supported: (value: boolean) => void;
   decrypt_clipboard: (version: number) => ClipboardDecrypter;
-}
+};
 
 let notificationReplySupported = false;
 // Indicates if the user is idle or not
diff --git a/app/renderer/js/injected.ts b/app/renderer/js/injected.ts
index 0a9c95cf..a2a4c9fd 100644
--- a/app/renderer/js/injected.ts
+++ b/app/renderer/js/injected.ts
@@ -2,11 +2,11 @@
 
 type ElectronBridge = import("./electron-bridge").ElectronBridge;
 
-interface CompatElectronBridge extends ElectronBridge {
+type CompatElectronBridge = {
   readonly idle_on_system: boolean;
   readonly last_active_on_system: number;
   send_notification_reply_message_supported: boolean;
-}
+} & ElectronBridge;
 
 (() => {
   const zulipWindow = window as typeof window & {
diff --git a/app/renderer/js/notification/index.ts b/app/renderer/js/notification/index.ts
index 77379490..0a92aa11 100644
--- a/app/renderer/js/notification/index.ts
+++ b/app/renderer/js/notification/index.ts
@@ -1,6 +1,6 @@
 import {ipcRenderer} from "../typed-ipc-renderer";
 
-export interface NotificationData {
+export type NotificationData = {
   close: () => void;
   title: string;
   dir: NotificationDirection;
@@ -9,7 +9,7 @@ export interface NotificationData {
   tag: string;
   icon: string;
   data: unknown;
-}
+};
 
 export function newNotification(
   title: string,
diff --git a/app/renderer/js/pages/preference/base-section.ts b/app/renderer/js/pages/preference/base-section.ts
index 84bfd2fe..4b286418 100644
--- a/app/renderer/js/pages/preference/base-section.ts
+++ b/app/renderer/js/pages/preference/base-section.ts
@@ -3,12 +3,12 @@ import {html} from "../../../../common/html";
 import {generateNodeFromHtml} from "../../components/base";
 import {ipcRenderer} from "../../typed-ipc-renderer";
 
-interface BaseSectionProps {
+type BaseSectionProps = {
   $element: HTMLElement;
   disabled?: boolean;
   value: boolean;
   clickHandler: () => void;
-}
+};
 
 export function generateSettingOption(props: BaseSectionProps): void {
   const {$element, disabled, value, clickHandler} = props;
diff --git a/app/renderer/js/pages/preference/connected-org-section.ts b/app/renderer/js/pages/preference/connected-org-section.ts
index 1fe5bb2a..aa6d7b5e 100644
--- a/app/renderer/js/pages/preference/connected-org-section.ts
+++ b/app/renderer/js/pages/preference/connected-org-section.ts
@@ -7,9 +7,9 @@ import {reloadApp} from "./base-section";
 import {initFindAccounts} from "./find-accounts";
 import {initServerInfoForm} from "./server-info-form";
 
-interface ConnectedOrgSectionProps {
+type ConnectedOrgSectionProps = {
   $root: Element;
-}
+};
 
 export function initConnectedOrgSection({
   $root,
diff --git a/app/renderer/js/pages/preference/find-accounts.ts b/app/renderer/js/pages/preference/find-accounts.ts
index b09882f3..407a46e9 100644
--- a/app/renderer/js/pages/preference/find-accounts.ts
+++ b/app/renderer/js/pages/preference/find-accounts.ts
@@ -3,9 +3,9 @@ import * as LinkUtil from "../../../../common/link-util";
 import * as t from "../../../../common/translation-util";
 import {generateNodeFromHtml} from "../../components/base";
 
-interface FindAccountsProps {
+type FindAccountsProps = {
   $root: Element;
-}
+};
 
 async function findAccounts(url: string): Promise<void> {
   if (!url) {
diff --git a/app/renderer/js/pages/preference/general-section.ts b/app/renderer/js/pages/preference/general-section.ts
index 72d4f10e..330c2add 100644
--- a/app/renderer/js/pages/preference/general-section.ts
+++ b/app/renderer/js/pages/preference/general-section.ts
@@ -20,9 +20,9 @@ import {generateSelectHtml, generateSettingOption} from "./base-section";
 
 const currentBrowserWindow = remote.getCurrentWindow();
 
-interface GeneralSectionProps {
+type GeneralSectionProps = {
   $root: Element;
-}
+};
 
 export function initGeneralSection({$root}: GeneralSectionProps): void {
   $root.innerHTML = html`
diff --git a/app/renderer/js/pages/preference/nav.ts b/app/renderer/js/pages/preference/nav.ts
index 35e5378e..7ebcdc7d 100644
--- a/app/renderer/js/pages/preference/nav.ts
+++ b/app/renderer/js/pages/preference/nav.ts
@@ -4,10 +4,10 @@ import * as t from "../../../../common/translation-util";
 import type {NavItem} from "../../../../common/types";
 import {generateNodeFromHtml} from "../../components/base";
 
-interface PreferenceNavProps {
+type PreferenceNavProps = {
   $root: Element;
   onItemSelected: (navItem: NavItem) => void;
-}
+};
 
 export default class PreferenceNav {
   navItems: NavItem[];
diff --git a/app/renderer/js/pages/preference/network-section.ts b/app/renderer/js/pages/preference/network-section.ts
index aef76b19..96816803 100644
--- a/app/renderer/js/pages/preference/network-section.ts
+++ b/app/renderer/js/pages/preference/network-section.ts
@@ -5,9 +5,9 @@ import {ipcRenderer} from "../../typed-ipc-renderer";
 
 import {generateSettingOption} from "./base-section";
 
-interface NetworkSectionProps {
+type NetworkSectionProps = {
   $root: Element;
-}
+};
 
 export function initNetworkSection({$root}: NetworkSectionProps): void {
   $root.innerHTML = html`
diff --git a/app/renderer/js/pages/preference/new-server-form.ts b/app/renderer/js/pages/preference/new-server-form.ts
index 2d7fe4db..bf894513 100644
--- a/app/renderer/js/pages/preference/new-server-form.ts
+++ b/app/renderer/js/pages/preference/new-server-form.ts
@@ -7,10 +7,10 @@ import {generateNodeFromHtml} from "../../components/base";
 import {ipcRenderer} from "../../typed-ipc-renderer";
 import * as DomainUtil from "../../utils/domain-util";
 
-interface NewServerFormProps {
+type NewServerFormProps = {
   $root: Element;
   onChange: () => void;
-}
+};
 
 export function initNewServerForm({$root, onChange}: NewServerFormProps): void {
   const $newServerForm = generateNodeFromHtml(html`
diff --git a/app/renderer/js/pages/preference/server-info-form.ts b/app/renderer/js/pages/preference/server-info-form.ts
index 7f4e71b8..06d5de48 100644
--- a/app/renderer/js/pages/preference/server-info-form.ts
+++ b/app/renderer/js/pages/preference/server-info-form.ts
@@ -8,12 +8,12 @@ import {generateNodeFromHtml} from "../../components/base";
 import {ipcRenderer} from "../../typed-ipc-renderer";
 import * as DomainUtil from "../../utils/domain-util";
 
-interface ServerInfoFormProps {
+type ServerInfoFormProps = {
   $root: Element;
   server: ServerConf;
   index: number;
   onChange: () => void;
-}
+};
 
 export function initServerInfoForm(props: ServerInfoFormProps): void {
   const $serverInfoForm = generateNodeFromHtml(html`
diff --git a/app/renderer/js/pages/preference/servers-section.ts b/app/renderer/js/pages/preference/servers-section.ts
index 2b2823a2..bd4875b9 100644
--- a/app/renderer/js/pages/preference/servers-section.ts
+++ b/app/renderer/js/pages/preference/servers-section.ts
@@ -4,9 +4,9 @@ import * as t from "../../../../common/translation-util";
 import {reloadApp} from "./base-section";
 import {initNewServerForm} from "./new-server-form";
 
-interface ServersSectionProps {
+type ServersSectionProps = {
   $root: Element;
-}
+};
 
 export function initServersSection({$root}: ServersSectionProps): void {
   $root.innerHTML = html`
diff --git a/app/renderer/js/pages/preference/shortcuts-section.ts b/app/renderer/js/pages/preference/shortcuts-section.ts
index 8030e78e..f11c01d6 100644
--- a/app/renderer/js/pages/preference/shortcuts-section.ts
+++ b/app/renderer/js/pages/preference/shortcuts-section.ts
@@ -4,9 +4,9 @@ import {html} from "../../../../common/html";
 import * as LinkUtil from "../../../../common/link-util";
 import * as t from "../../../../common/translation-util";
 
-interface ShortcutsSectionProps {
+type ShortcutsSectionProps = {
   $root: Element;
-}
+};
 
 // eslint-disable-next-line complexity
 export function initShortcutsSection({$root}: ShortcutsSectionProps): void {