fix: improve WSL login fallback

tests/alpha-hub-auth-patch.test.ts

@@ -0,0 +1,51 @@
+import test from "node:test";
+import assert from "node:assert/strict";
+
+import { patchAlphaHubAuthSource } from "../scripts/lib/alpha-hub-auth-patch.mjs";
+
+test("patchAlphaHubAuthSource fixes browser open logic for WSL and Windows", () => {
+	const input = [
+		"function openBrowser(url) {",
+		"  try {",
+		"    const plat = platform();",
+		"    if (plat === 'darwin') execSync(`open \"${url}\"`);",
+		"    else if (plat === 'linux') execSync(`xdg-open \"${url}\"`);",
+		"    else if (plat === 'win32') execSync(`start \"\" \"${url}\"`);",
+		"  } catch {}",
+		"}",
+	].join("\n");
+
+	const patched = patchAlphaHubAuthSource(input);
+
+	assert.match(patched, /const isWsl = plat === 'linux'/);
+	assert.match(patched, /wslview/);
+	assert.match(patched, /cmd\.exe \/c start/);
+	assert.match(patched, /cmd \/c start/);
+});
+
+test("patchAlphaHubAuthSource includes the auth URL in login output", () => {
+	const input = "process.stderr.write('Opening browser for alphaXiv login...\\n');";
+
+	const patched = patchAlphaHubAuthSource(input);
+
+	assert.match(patched, /Auth URL: \$\{authUrl\.toString\(\)\}/);
+});
+
+test("patchAlphaHubAuthSource is idempotent", () => {
+	const input = [
+		"function openBrowser(url) {",
+		"  try {",
+		"    const plat = platform();",
+		"    if (plat === 'darwin') execSync(`open \"${url}\"`);",
+		"    else if (plat === 'linux') execSync(`xdg-open \"${url}\"`);",
+		"    else if (plat === 'win32') execSync(`start \"\" \"${url}\"`);",
+		"  } catch {}",
+		"}",
+		"process.stderr.write('Opening browser for alphaXiv login...\\n');",
+	].join("\n");
+
+	const once = patchAlphaHubAuthSource(input);
+	const twice = patchAlphaHubAuthSource(once);
+
+	assert.equal(twice, once);
+});