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/GeminiVisionService.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;
@@ -23,7 +24,7 @@ class GeminiVisionService
      * @param  string $mimeType MIME type (image/jpeg, image/png, etc.)
      * @return array|null  ['banco', 'valor', 'referencia', 'fecha', 'hora', 'remitente'] o null
      */
-    public function extraerPago(string $base64, string $mimeType): ?array
+    public function extraerPago(string $base64, string $mimeType, ?int $usuarioId = null, string $canal = 'telegram'): ?array
     {
         if (! $this->apiKey) {
             Log::warning('[Gemini Vision] No hay API key configurada.');
@@ -31,6 +32,7 @@ class GeminiVisionService
         }
 
         $prompt = $this->buildPrompt();
+        $inicio = microtime(true);
 
         try {
             $response = Http::withHeaders(['Content-Type' => 'application/json'])
@@ -48,16 +50,50 @@ class GeminiVisionService
                     ],
                 ]);
 
+            $tiempoMs = (int) ((microtime(true) - $inicio) * 1000);
+
             if (! $response->successful()) {
                 Log::warning('[Gemini Vision] API error: ' . $response->body());
+                AiUsageLog::registrar([
+                    'servicio'  => 'gemini_vision',
+                    'canal'     => $canal,
+                    'usuario_id'=> $usuarioId,
+                    'tiempo_ms' => $tiempoMs,
+                    'resultado' => 'error',
+                    'detalle'   => ['error' => substr($response->body(), 0, 300)],
+                ]);
                 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_vision',
+                'canal'        => $canal,
+                'usuario_id'   => $usuarioId,
+                'input_tokens' => $inputTokens,
+                'output_tokens'=> $outputTokens,
+                'tiempo_ms'    => $tiempoMs,
+                'resultado'    => $resultado ? 'ok' : 'error',
+                'detalle'      => $resultado ? ['banco' => $resultado['banco'], 'valor' => $resultado['valor']] : ['raw' => substr($text, 0, 200)],
+            ]);
+
+            return $resultado;
 
         } catch (\Throwable $e) {
+            $tiempoMs = (int) ((microtime(true) - $inicio) * 1000);
             Log::error('[Gemini Vision] Excepcion: ' . $e->getMessage());
+            AiUsageLog::registrar([
+                'servicio'  => 'gemini_vision',
+                'canal'     => $canal,
+                'usuario_id'=> $usuarioId,
+                'tiempo_ms' => $tiempoMs,
+                'resultado' => 'error',
+                'detalle'   => ['error' => $e->getMessage()],
+            ]);
             return null;
         }
     }