refactor: preload consistency

Signed-off-by: Adam Setch <adam.setch@outlook.com>

Author: setchy

src/preload/index.ts

@@ -9,8 +9,8 @@ import { invokeMainEvent, onRendererEvent, sendMainEvent } from './utils';
 /**
  * The Gitify Bridge API exposed to the renderer via `contextBridge`.
  *
- * All renderer↔main IPC communication must go through this object.
- * It is available on `window.gitify` inside the renderer process.
+ * Provides a safe, sandboxed interface for IPC communication between renderer and main.
+ * Accessible as `window.gitify` in the renderer.
  */
 export const api = {
   /**
@@ -118,7 +118,6 @@ export const api = {
    */
   twemojiDirectory: () => invokeMainEvent(EVENTS.TWEMOJI_DIRECTORY),
 
-  /** Platform detection helpers. */
   /** Platform detection helpers. */
   platform: {
     /** Returns `true` when running on Linux. */
@@ -161,7 +160,7 @@ export const api = {
     },
   },
 
-  /** Electron web frame zoom controls. */
+  /** Electron `webFrame` zoom controls. */
   zoom: {
     /**
      * Return the current Electron zoom level.
@@ -231,8 +230,10 @@ export const api = {
   },
 };
 
-// Use `contextBridge` APIs to expose Electron APIs to renderer
-// Context isolation is always enabled in this app
+/**
+ * Use `contextBridge` APIs to expose Electron APIs to renderer.
+ * Context isolation is always enabled in this app
+ */
 try {
   contextBridge.exposeInMainWorld('gitify', api);
 } catch (error) {

src/preload/utils.test.ts

@@ -31,6 +31,7 @@ import { ipcRenderer } from 'electron';
 describe('preload/utils', () => {
   it('sendMainEvent forwards to ipcRenderer.send', () => {
     sendMainEvent(EVENTS.WINDOW_SHOW);
+
     expect(ipcRenderer.send).toHaveBeenCalledWith(
       EVENTS.WINDOW_SHOW,
       undefined,
@@ -39,6 +40,7 @@ describe('preload/utils', () => {
 
   it('invokeMainEvent forwards and resolves', async () => {
     const result = await invokeMainEvent(EVENTS.VERSION, 'data');
+
     expect(ipcRenderer.invoke).toHaveBeenCalledWith(EVENTS.VERSION, 'data');
     expect(result).toBe('response');
   });
@@ -57,6 +59,7 @@ describe('preload/utils', () => {
         __emit: (channel: string, ...a: unknown[]) => void;
       }
     ).__emit(EVENTS.UPDATE_ICON_TITLE, 'payload');
+
     expect(ipcRenderer.on).toHaveBeenCalledWith(
       EVENTS.UPDATE_ICON_TITLE,
       handlerMock,

src/preload/utils.ts

@@ -19,11 +19,17 @@ export function sendMainEvent(event: EventType, data?: EventData): void {
  * @param data - Optional string payload to include with the event.
  * @returns A promise that resolves to the string response from the main process.
  */
-export function invokeMainEvent(
+export async function invokeMainEvent(
   event: EventType,
   data?: string,
 ): Promise<string> {
-  return ipcRenderer.invoke(event, data);
+  try {
+    return await ipcRenderer.invoke(event, data);
+  } catch (err) {
+    // biome-ignore lint/suspicious/noConsole: preload environment is strictly sandboxed
+    console.error(`[IPC] invoke failed: ${event}`, err);
+    throw err;
+  }
 }
 
 /**