Improve AI content generation by handling OpenRouter API errors

Enhance the OpenRouterService to log detailed error responses and validate the structure of the API response before processing, addressing issues with AI content generation.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: ae4037a0-2a6f-4530-9bac-79b543286bda
Replit-Commit-Checkpoint-Type: full_checkpoint
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/397bca8c-984f-43ff-841a-10897aeb8140/ae4037a0-2a6f-4530-9bac-79b543286bda/cIV2GBh

server/services/openrouter.ts

@@ -50,10 +50,19 @@ export class OpenRouterService {
       });
 
       if (!response.ok) {
+        const errorText = await response.text();
+        console.error('OpenRouter API Error Response:', errorText);
         throw new Error(`OpenRouter API error: ${response.status} ${response.statusText}`);
       }
 
       const data = await response.json();
+      console.log('OpenRouter API Response:', JSON.stringify(data, null, 2));
+      
+      if (!data.choices || !data.choices[0]) {
+        console.error('Invalid OpenRouter response structure:', data);
+        throw new Error('Réponse invalide de l\'API OpenRouter. Vérifiez votre clé API et votre modèle.');
+      }
+      
       const content = data.choices[0]?.message?.content || "";
 
       return this.parseGeneratedText(content);