feat: enhanced AI usage logging (model, provider, response) and fixed build blockers

src/app/actions/scan-label.ts

@@ -186,7 +186,10 @@ export async function scanLabel(input: any): Promise<AnalysisResponse> {
                     userId: userId,
                     apiType: 'gemini_ai',
                     endpoint: 'scanLabel_openrouter',
-                    success: true
+                    success: true,
+                    provider: 'openrouter',
+                    model: 'google/gemma-3-27b-it',
+                    responseText: content
                 });
                 await deductCredits(userId, 'gemini_ai', 'Bottle OCR scan (OpenRouter)');
 
@@ -248,7 +251,10 @@ export async function scanLabel(input: any): Promise<AnalysisResponse> {
                     userId: userId,
                     apiType: 'gemini_ai',
                     endpoint: 'scanLabel_gemini',
-                    success: true
+                    success: true,
+                    provider: 'google',
+                    model: 'gemini-2.5-flash',
+                    responseText: result.response.text()
                 });
                 await deductCredits(userId, 'gemini_ai', 'Bottle OCR scan (Gemini)');
 
@@ -279,7 +285,9 @@ export async function scanLabel(input: any): Promise<AnalysisResponse> {
                 apiType: 'gemini_ai',
                 endpoint: `scanLabel_${provider}`,
                 success: false,
-                errorMessage: aiError.message
+                errorMessage: aiError.message,
+                provider: provider,
+                model: provider === 'openrouter' ? 'google/gemma-3-27b-it' : 'gemini-2.5-flash'
             });
 
             return {