fix: use existing getPlatform() so the OS based CPU readback check also works in the browser

src/lib/exporter/gifExporter.ts

@@ -8,6 +8,7 @@ import type {
 	WebcamSizePreset,
 	ZoomRegion,
 } from "@/components/video-editor/types";
+import { getPlatform } from "@/utils/platformUtils";
 import { AsyncVideoFrameQueue } from "./asyncVideoFrameQueue";
 import { FrameRenderer } from "./frameRenderer";
 import { StreamingVideoDecoder } from "./streamingDecoder";
@@ -117,7 +118,7 @@ export class GifExporter {
 		let webcamFrameQueue: AsyncVideoFrameQueue | null = null;
 
 		try {
-			const platform = await window.electronAPI.getPlatform();
+			const platform = await getPlatform();
 
 			this.cleanup();
 			this.cancelled = false;

src/lib/exporter/videoExporter.ts

@@ -7,6 +7,7 @@ import type {
 	WebcamSizePreset,
 	ZoomRegion,
 } from "@/components/video-editor/types";
+import { getPlatform } from "@/utils/platformUtils";
 import { AsyncVideoFrameQueue } from "./asyncVideoFrameQueue";
 import { AudioProcessor } from "./audioEncoder";
 import { FrameRenderer } from "./frameRenderer";
@@ -112,7 +113,7 @@ export class VideoExporter {
 		this.fatalEncoderError = null;
 
 		try {
-			const platform = await window.electronAPI.getPlatform();
+			const platform = await getPlatform();
 
 			const streamingDecoder = new StreamingVideoDecoder();
 			this.streamingDecoder = streamingDecoder;

src/utils/platformUtils.ts

@@ -3,7 +3,7 @@ let cachedPlatform: string | null = null;
 /**
  * Gets the current platform from Electron
  */
-const getPlatform = async (): Promise<string> => {
+export const getPlatform = async (): Promise<string> => {
 	if (cachedPlatform) return cachedPlatform;
 
 	try {
@@ -14,9 +14,14 @@ const getPlatform = async (): Promise<string> => {
 		console.warn("Failed to get platform from Electron, falling back to navigator:", error);
 		// Fallback for development/testing
 		let fallbackPlatform = "win32";
-		if (typeof navigator !== "undefined" && /Mac|iPhone|iPad|iPod/.test(navigator.platform)) {
-			fallbackPlatform = "darwin";
+		if (typeof navigator !== "undefined") {
+			if (/Mac|iPhone|iPad|iPod/.test(navigator.platform)) {
+				fallbackPlatform = "darwin";
+			} else if (/Linux/.test(navigator.platform)) {
+				fallbackPlatform = "linux";
+			}
 		}
+
 		cachedPlatform = fallbackPlatform;
 		return fallbackPlatform;
 	}