fix: usar remitente correcto en DMs y evitar Invalid sender ID

Co-authored-by: aider (openrouter/openai/gpt-5) <aider@aider.chat>

src/server.ts

@@ -145,11 +145,43 @@ export class WebhookServer {
 			return;
 		}
 
+		// Determine sender depending on context (group vs DM) and ignore non-user messages
+		const remoteJid = data.key.remoteJid;
+		const participant = data.key.participant;
+		const fromMe = !!data.key.fromMe;
+
+		// Ignore broadcasts/status
+		if (remoteJid === 'status@broadcast' || (typeof remoteJid === 'string' && remoteJid.endsWith('@broadcast'))) {
+			if (process.env.NODE_ENV !== 'test') {
+				console.log('ℹ️ Ignoring broadcast/status message');
+			}
+			return;
+		}
+
+		// Ignore our own messages
+		if (fromMe) {
+			if (process.env.NODE_ENV !== 'test') {
+				console.log('ℹ️ Ignoring message sent by the bot (fromMe=true)');
+			}
+			return;
+		}
+
+		// Compute sender JID based on chat type
+		const senderRaw = isGroupId(remoteJid) ? participant : remoteJid;
+
 		// Normalize sender ID for consistency and validation
-		const normalizedSenderId = normalizeWhatsAppId(data.key.participant);
+		const normalizedSenderId = normalizeWhatsAppId(senderRaw);
 		if (!normalizedSenderId) {
 			if (process.env.NODE_ENV !== 'test') {
-				console.log('⚠️ Invalid sender ID, ignoring message');
+				console.debug('⚠️ Invalid sender ID, ignoring message', { remoteJid, participant, fromMe });
+			}
+			return;
+		}
+
+		// Avoid processing messages from the bot number
+		if (process.env.CHATBOT_PHONE_NUMBER && normalizedSenderId === process.env.CHATBOT_PHONE_NUMBER) {
+			if (process.env.NODE_ENV !== 'test') {
+				console.log('ℹ️ Ignoring message from the bot number');
 			}
 			return;
 		}
@@ -157,7 +189,7 @@ export class WebhookServer {
 		// Ensure user exists in database (swallow DB errors to keep webhook 200)
 		let userId: string | null = null;
 		try {
-			userId = ensureUserExists(data.key.participant, WebhookServer.dbInstance);
+			userId = ensureUserExists(senderRaw, WebhookServer.dbInstance);
 		} catch (e) {
 			if (process.env.NODE_ENV !== 'test') {
 				console.error('⚠️ Error ensuring user exists, ignoring message:', e);