fix: use MACOS platform to resolve 405 connection failure

WhatsApp servers reject UserAgent.Platform.WEB (value 14) since
Feb 2026, causing 405 on new device pairing. MACOS (value 24)
matches current WhatsApp Web behavior. Ref: Baileys#2365, #2370.

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

src/Utils/process-message.ts

@@ -113,14 +113,6 @@ export const cleanMessage = (message: WAMessage, meId: string, meLid: string) =>
 			msgKey.remoteJid = message.key.remoteJid
 			// set participant of the message
 			msgKey.participant = msgKey.participant || message.key.participant
-		} else {
-			// fromMe reactions/polls: normalise remoteJid to match the chat JID
-			// ensures DM reaction keys are consistent with group behavior
-			msgKey.remoteJid = message.key.remoteJid
-			// in groups, normalise participant for own messages too
-			if (message.key.participant) {
-				msgKey.participant = msgKey.participant || message.key.participant
-			}
 		}
 	}
 }

src/Utils/validate-connection.ts

@@ -20,7 +20,7 @@ const getUserAgent = (config: SocketConfig): proto.ClientPayload.IUserAgent => {
 			secondary: config.version[1],
 			tertiary: config.version[2]
 		},
-		platform: proto.ClientPayload.UserAgent.Platform.WEB,
+		platform: proto.ClientPayload.UserAgent.Platform.MACOS,
 		releaseChannel: proto.ClientPayload.UserAgent.ReleaseChannel.RELEASE,
 		osVersion: '0.1',
 		device: 'Desktop',