style: AI 추천 이미지 스타일 최종 조정

- flexbox 중앙 정렬
- 160px 너비, 높이 자동
- border/outline 명시적 제거

backend/templates/my_page.html

@@ -466,8 +466,8 @@
             </div>
             <div style="padding:0 24px 32px;">
                 <div style="text-align:center;padding:8px 0 20px;">
-                    <div id="rec-image-container" style="margin-bottom:20px;text-align:center;">
-                        <img id="rec-image" style="max-width:140px;max-height:140px;object-fit:contain;display:none;" alt="추천 제품">
+                    <div id="rec-image-container" style="margin-bottom:20px;width:100%;display:flex;justify-content:center;">
+                        <img id="rec-image" style="width:160px;height:auto;border:none;outline:none;display:none;" alt="추천 제품">
                         <div id="rec-emoji" style="font-size:56px;">💊</div>
                     </div>
                     <div id="rec-message" style="color:#343a40;font-size:16px;font-weight:500;line-height:1.6;letter-spacing:-0.3px;margin-bottom:16px;"></div>