fix: accept uppercase T/Tarea command prefixes from mobile keyboards

Make isTaskCommand in webhook-handler case-insensitive so that 'T ' and
'Tarea ' are recognized as task commands (mobile keyboards auto-capitalize
the first character). Add tests for both variants.

src/http/webhook-handler.ts

@@ -372,7 +372,8 @@ async function handleTaskCommand(
 
 /** True when the message should be forwarded to the command service. */
 function isTaskCommand(text: string): boolean {
-  return text.startsWith('tarea ') || text.startsWith('t ');
+  const lower = text.toLowerCase();
+  return lower.startsWith('tarea ') || lower.startsWith('t ');
 }
 
 // ---------------------------------------------------------------------------

tests/unit/server.basic.test.ts

@@ -148,6 +148,42 @@ describe('WebhookServer — Basic validation', () => {
 		expect(SimulatedResponseQueue.get().length).toBe(0);
 	});
 
+	test('should process command with uppercase T prefix (T area)', async () => {
+		const payload = {
+			event: 'messages.upsert',
+			instance: 'test-instance',
+			data: {
+				key: {
+					remoteJid: 'group-id@g.us',
+					participant: 'sender-id@s.whatsapp.net',
+				},
+				message: { conversation: 'T n Test uppercase T' },
+			},
+		};
+		const request = createTestRequest(payload);
+		const response = await WebhookServer.handleRequest(request);
+		expect(response.status).toBe(200);
+		expect(SimulatedResponseQueue.get().length).toBeGreaterThan(0);
+	});
+
+	test('should process command with uppercase Tarea prefix', async () => {
+		const payload = {
+			event: 'messages.upsert',
+			instance: 'test-instance',
+			data: {
+				key: {
+					remoteJid: 'group-id@g.us',
+					participant: 'sender-id@s.whatsapp.net',
+				},
+				message: { conversation: 'Tarea nueva Test uppercase Tarea' },
+			},
+		};
+		const request = createTestRequest(payload);
+		const response = await WebhookServer.handleRequest(request);
+		expect(response.status).toBe(200);
+		expect(SimulatedResponseQueue.get().length).toBeGreaterThan(0);
+	});
+
 	test('should ignore message with mentions but no command', async () => {
 		const payload = {
 			event: 'messages.upsert',