Add AI usage logs for Gemini and Whisper

- Migration + AiUsageLog model with tokens, duration, time, cost fields
- GeminiIntentService and GeminiVisionService log every API call
  with input/output token counts from usageMetadata and response time
- TelegramBotService logs Whisper calls with audio duration (from Telegram)
  and calculates cost at $1/second
- Whisper voice duration now passed from TelegramWebhookController
- Free text in Telegram now tries Gemini intent detection before showing menu
- /chat/ia-logs: Livewire component with summary cards + filterable table
- Whisper connection test button in config panel
- "Logs IA" link added to Chat/Bot nav section

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

app/Services/GeminiIntentService.php

@@ -2,6 +2,7 @@
 
 namespace App\Services;
 
+use App\Models\AiUsageLog;
 use App\Models\ChatConfig;
 use Illuminate\Support\Facades\Http;
 use Illuminate\Support\Facades\Log;
@@ -20,13 +21,14 @@ class GeminiIntentService
      * Detecta la intención del texto del usuario y la mapea a una acción del sistema.
      * Retorna ['action' => string, 'data' => array] o null si no se puede detectar.
      */
-    public function detectar(string $texto): ?array
+    public function detectar(string $texto, ?int $usuarioId = null, string $canal = 'web'): ?array
     {
         if (! $this->apiKey || ChatConfig::get('gemini_habilitado', '0') !== '1') {
             return null;
         }
 
         $prompt = $this->buildPrompt($texto);
+        $inicio = microtime(true);
 
         try {
             $response = Http::withHeaders(['Content-Type' => 'application/json'])
@@ -39,16 +41,50 @@ class GeminiIntentService
                     ],
                 ]);
 
+            $tiempoMs = (int) ((microtime(true) - $inicio) * 1000);
+
             if (! $response->successful()) {
                 Log::warning('[Gemini Intent] API error: ' . $response->body());
+                AiUsageLog::registrar([
+                    'servicio'  => 'gemini_intent',
+                    'canal'     => $canal,
+                    'usuario_id'=> $usuarioId,
+                    'tiempo_ms' => $tiempoMs,
+                    'resultado' => 'error',
+                    'detalle'   => ['error' => substr($response->body(), 0, 300), 'texto' => $texto],
+                ]);
                 return null;
             }
 
-            $text = $response->json('candidates.0.content.parts.0.text', '');
-            return $this->parseRespuesta($text);
+            $inputTokens  = $response->json('usageMetadata.promptTokenCount', 0);
+            $outputTokens = $response->json('usageMetadata.candidatesTokenCount', 0);
+            $text         = $response->json('candidates.0.content.parts.0.text', '');
+            $resultado    = $this->parseRespuesta($text);
+
+            AiUsageLog::registrar([
+                'servicio'     => 'gemini_intent',
+                'canal'        => $canal,
+                'usuario_id'   => $usuarioId,
+                'input_tokens' => $inputTokens,
+                'output_tokens'=> $outputTokens,
+                'tiempo_ms'    => $tiempoMs,
+                'resultado'    => 'ok',
+                'detalle'      => ['texto' => $texto, 'accion' => $resultado['action'] ?? null],
+            ]);
+
+            return $resultado;
 
         } catch (\Throwable $e) {
+            $tiempoMs = (int) ((microtime(true) - $inicio) * 1000);
             Log::warning('[Gemini Intent] Excepcion: ' . $e->getMessage());
+            AiUsageLog::registrar([
+                'servicio'  => 'gemini_intent',
+                'canal'     => $canal,
+                'usuario_id'=> $usuarioId,
+                'tiempo_ms' => $tiempoMs,
+                'resultado' => 'error',
+                'detalle'   => ['error' => $e->getMessage(), 'texto' => $texto],
+            ]);
             return null;
         }
     }