fix: force Spanish in Whisper + clearer voice processing message

- Add language=es to Whisper query params so audio is always transcribed in Spanish regardless of accent or background noise
- Show "Procesando..." after echoing the transcript so user knows the AI is interpreting the intent

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

app/Services/TelegramBotService.php

@@ -242,7 +242,7 @@ class TelegramBotService
                 return;
             }
 
-            $this->send($chatId, "🎙️ Escuché: _\"{$resultado['texto']}\"_");
+            $this->send($chatId, "🎙️ Escuché: _\"{$resultado['texto']}\"_\nProcesando...");
             $this->handleText($chatId, $resultado['texto'], $nombre);
 
         } catch (\Throwable $e) {
@@ -262,8 +262,9 @@ class TelegramBotService
         }
 
         try {
-            // response_format como query param (algunos servidores no lo leen del form)
-            $url = rtrim($whisperUrl, '?') . (str_contains($whisperUrl, '?') ? '&' : '?') . 'response_format=json';
+            // response_format y language como query params
+            $sep = str_contains($whisperUrl, '?') ? '&' : '?';
+            $url = rtrim($whisperUrl, '?') . $sep . 'response_format=json&language=es';
 
             $response = Http::timeout(60)
                 ->withBasicAuth('whisper', $whisperToken)