fix(capture): stabilize platform source handling

src/hooks/useScreenRecorder.test.ts

@@ -4,6 +4,7 @@ import {
 	createProcessedMicrophoneConstraints,
 	normalizeBrowserMicrophoneProfile,
 	resolveBrowserCaptureCursorPolicy,
+	shouldUseNativeWindowsCaptureForSource,
 } from "./useScreenRecorder";
 
 type RecordingState = "inactive" | "recording" | "paused";
@@ -129,6 +130,16 @@ describe("resolveBrowserCaptureCursorPolicy", () => {
 	});
 });
 
+describe("shouldUseNativeWindowsCaptureForSource", () => {
+	it("keeps native Windows capture on screen sources", () => {
+		expect(shouldUseNativeWindowsCaptureForSource({ id: "screen:101:0" })).toBe(true);
+	});
+
+	it("routes window sources through browser capture", () => {
+		expect(shouldUseNativeWindowsCaptureForSource({ id: "window:123456:0" })).toBe(false);
+	});
+});
+
 function stopRecording(
 	recorder: ReturnType<typeof createMockMediaRecorder>,
 	isNativeRecording: boolean,

src/hooks/useScreenRecorder.ts

@@ -211,6 +211,12 @@ export function resolveBrowserCaptureCursorPolicy({
 	};
 }
 
+export function shouldUseNativeWindowsCaptureForSource(
+	source: Pick<ProcessedDesktopSource, "id"> | null | undefined,
+): boolean {
+	return source?.id?.startsWith("screen:") === true;
+}
+
 export function createProcessedMicrophoneConstraints(
 	microphoneDeviceId?: string,
 	profile: BrowserMicrophoneProfile = DEFAULT_BROWSER_MICROPHONE_PROFILE,
@@ -1362,8 +1368,7 @@ export function useScreenRecorder(): UseScreenRecorderReturn {
 			let nativeWindowsCaptureStartFailed = false;
 			if (
 				platform === "win32" &&
-				(selectedSource.id?.startsWith("screen:") ||
-					selectedSource.id?.startsWith("window:")) &&
+				shouldUseNativeWindowsCaptureForSource(selectedSource) &&
 				typeof window.electronAPI.isNativeWindowsCaptureAvailable === "function"
 			) {
 				try {