chore(export): add nvidia cuda dev launcher

package.json

@@ -16,6 +16,7 @@
 	"type": "module",
 	"scripts": {
 		"dev": "vite --config vite.config.ts",
+		"dev:nvidia-cuda": "node scripts/dev-nvidia-cuda.mjs",
 		"postinstall": "node scripts/postinstall.mjs",
 		"build": "npm run build:platform-native-helpers && tsc && vite build --config vite.config.ts && npm run normalize:electron-main-cjs && npm run smoke:electron-main-cjs && electron-builder",
 		"lint": "biome check .",

scripts/dev-nvidia-cuda.mjs

@@ -0,0 +1,46 @@
+import { spawn } from "node:child_process";
+import path from "node:path";
+import { fileURLToPath } from "node:url";
+
+const repoRoot = path.resolve(path.dirname(fileURLToPath(import.meta.url)), "..");
+const npmCommand = process.platform === "win32" ? "npm.cmd" : "npm";
+const env = {
+	...process.env,
+	RECORDLY_EXPERIMENTAL_NVIDIA_CUDA_EXPORT: "1",
+	RECORDLY_NATIVE_EXPORT_DIAGNOSTICS:
+		process.env.RECORDLY_NATIVE_EXPORT_DIAGNOSTICS ?? "always",
+	RECORDLY_NVIDIA_CUDA_EXPORT_DIAGNOSTICS: "1",
+	RECORDLY_NVIDIA_CUDA_EXPORT_HIGH_PRIORITY: "1",
+	RECORDLY_NVIDIA_CUDA_FORCE_VIDEO_ONLY: "1",
+	RECORDLY_NVIDIA_CUDA_SAMPLE_GPU: "1",
+};
+
+delete env.RECORDLY_NVIDIA_CUDA_ALLOW_AUDIO_EXPORT;
+
+const diagnosticsHint =
+	process.platform === "win32" && process.env.APPDATA
+		? path.join(process.env.APPDATA, "Recordly-dev", "native-export-diagnostics")
+		: "the Recordly-dev native-export-diagnostics userData folder";
+
+console.log("Starting Recordly dev with guarded NVIDIA CUDA/NVENC export enabled.");
+console.log("CUDA mode: video-only native render, then shared app audio mux.");
+console.log(`Diagnostics: ${diagnosticsHint}`);
+
+const child = spawn(npmCommand, ["run", "dev"], {
+	cwd: repoRoot,
+	env,
+	stdio: "inherit",
+});
+
+child.on("exit", (code, signal) => {
+	if (signal) {
+		process.kill(process.pid, signal);
+		return;
+	}
+	process.exit(code ?? 0);
+});
+
+child.on("error", (error) => {
+	console.error("Failed to launch Recordly dev:", error);
+	process.exit(1);
+});