feat: change default browser to Android (SMB_ANDROID)

Default is now Browsers.android('14') matching upstream PR #2201.
Pair code auto-detects Android and falls back to Chrome (socket.ts).
Set BAILEYS_BROWSER=chrome to force Chrome/macOS if needed.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/Socket/socket.ts

@@ -1351,23 +1351,14 @@ export const makeSocket = (config: SocketConfig) => {
 			name: '~'
 		}
 
-		// Pair code companion_platform_id must be Chrome (1) when using Android
-		// browser preset. ANDROID_PHONE (16) causes silent timeout (server ignores),
-		// UWP (21) causes "cannot connect device" rejection. Only Chrome (1) works
-		// for pair code via web protocol (WA\x06\x03). The device still appears as
-		// "Android" in linked devices because DeviceProps.platformType=ANDROID_PHONE
-		// is set separately in the registration node.
+		// Pair code with Android browser doesn't work (WA server rejects the
+		// companion registration). When Android is detected, fall back to the
+		// Chrome/macOS platform values that are known to work.
 		const isAndroid = isAndroidBrowser(browser)
 		const pairPlatformId = isAndroid ? getPlatformId('Chrome') : getPlatformId(browser[1])
 		const pairPlatformDisplay = isAndroid ? 'Chrome (Mac OS)' : `${browser[1]} (${browser[0]})`
 
-		logger.info({
-			pairCode: pairingCode,
-			jid: authState.creds.me.id,
-			companionPlatformId: pairPlatformId,
-			companionPlatformDisplay: pairPlatformDisplay,
-			isAndroid,
-		}, `pair code requested | companion: ${pairPlatformDisplay} | ${isAndroid ? 'android override -> Chrome' : 'native platform'}`)
+		logger.info(`\uD83D\uDD17 Pair code requested | companion: ${pairPlatformDisplay} | ${isAndroid ? 'android override \u2192 Chrome' : 'native platform'}`)
 
 		ev.emit('creds.update', authState.creds)
 		await sendNode({

src/Utils/validate-connection.ts

@@ -9,27 +9,25 @@ import {
 } from '../Defaults'
 import type { AuthenticationCreds, SignalCreds, SocketConfig } from '../Types'
 import { type BinaryNode, getBinaryNodeChild, jidDecode, S_WHATSAPP_NET } from '../WABinary'
+import { isAndroidBrowser } from './browser-utils'
 import { Curve, hmacSign } from './crypto'
 import { encodeBigEndian } from './generics'
 import { createSignalIdentity } from './signal'
 
 const getUserAgent = (config: SocketConfig): proto.ClientPayload.IUserAgent => {
-	// Always use MACOS/Desktop identity for UserAgent — we connect via web
-	// protocol (WA\x06\x03) so the server expects a web-like UserAgent.
-	// Using SMB_ANDROID here causes pair code registration to fail with
-	// "não é possível conectar" even though the phone shows the confirmation.
-	// Android identity is only set in DeviceProps (registration node) which
-	// determines the display name in "Linked Devices".
+	const isAndroid = isAndroidBrowser(config.browser)
 	return {
 		appVersion: {
 			primary: config.version[0],
 			secondary: config.version[1],
 			tertiary: config.version[2]
 		},
-		platform: proto.ClientPayload.UserAgent.Platform.MACOS,
+		platform: isAndroid
+			? proto.ClientPayload.UserAgent.Platform.SMB_ANDROID
+			: proto.ClientPayload.UserAgent.Platform.MACOS,
 		releaseChannel: proto.ClientPayload.UserAgent.ReleaseChannel.RELEASE,
-		osVersion: '0.1',
-		device: 'Desktop',
+		osVersion: isAndroid ? config.browser[0] : '0.1',
+		device: isAndroid ? 'Android' : 'Desktop',
 		osBuildNumber: '0.1',
 		localeLanguageIso6391: 'en',
 		mnc: '000',
@@ -60,8 +58,11 @@ const getClientPayload = (config: SocketConfig) => {
 	const payload: proto.IClientPayload = {
 		connectType: proto.ClientPayload.ConnectType.WIFI_UNKNOWN,
 		connectReason: proto.ClientPayload.ConnectReason.USER_ACTIVATED,
-		userAgent: getUserAgent(config),
-		webInfo: getWebInfo(config)
+		userAgent: getUserAgent(config)
+	}
+
+	if (!isAndroidBrowser(config.browser)) {
+		payload.webInfo = getWebInfo(config)
 	}
 
 	return payload