diff --git a/src/lib/generateReport.ts b/src/lib/generateReport.ts
index abf97a0..d876cfb 100644
--- a/src/lib/generateReport.ts
+++ b/src/lib/generateReport.ts
@@ -227,10 +227,14 @@ export async function generateInspectionReport(data: ReportData) {
 
     for (let i = 0; i < data.screenshots.length; i++) {
       checkSpace(100);
+      const src = data.screenshots[i];
       try {
+        if (typeof src !== 'string' || !src.startsWith('data:image/')) {
+          throw new Error('formato de imagem inválido (esperado data URL)');
+        }
         const imgW = contentW;
         const imgH = imgW * 0.56; // ~16:9
-        pdf.addImage(data.screenshots[i], 'PNG', margin, y, imgW, imgH);
+        pdf.addImage(src, 'PNG', margin, y, imgW, imgH);
         y += imgH + 3;
 
         pdf.setFontSize(7);
@@ -238,10 +242,12 @@ export async function generateInspectionReport(data: ReportData) {
         pdf.setTextColor(148, 163, 184);
         pdf.text(`Captura ${i + 1} de ${data.screenshots.length}`, margin, y);
         y += 8;
-      } catch {
+      } catch (err) {
+        const msg = err instanceof Error ? err.message : String(err);
+        console.warn(`[generateReport] screenshot ${i + 1} falhou:`, msg);
         pdf.setFontSize(8);
         pdf.setTextColor(200, 50, 50);
-        pdf.text(`[Erro ao inserir screenshot ${i + 1}]`, margin, y);
+        pdf.text(`[Erro ao inserir screenshot ${i + 1}: ${msg}]`, margin, y);
         y += 8;
       }
     }