Fix vehicle click issue in My Vehicle Requests page

- Use car_id or fallback to car_data.local_car_id or car_data.id
- Disable link if no valid car ID is available
- Show "Vehicle unavailable" message when car ID is missing

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

frontend/src/app/my-request/page.tsx

@@ -211,9 +211,14 @@ export default function MyRequestPage() {
                       {item.approved_vehicles.map((vehicle) => {
                         const carData = vehicle.car_data;
                         const priceInfo = formatPrice(carData?.final_price);
+                        const isSoldout = carData?.soldout === true;
+                        // Use car_id from vehicle or fallback to local_car_id in car_data
+                        const carId = vehicle.car_id || carData?.local_car_id || carData?.id;
 
                         return (
-                          <div key={vehicle.id} className="bg-white rounded-lg shadow-sm overflow-hidden border">
+                          <div key={vehicle.id} className={`bg-white rounded-lg shadow-sm overflow-hidden border transition-shadow ${isSoldout ? 'opacity-75' : 'hover:shadow-md'}`}>
+                            {/* Clickable Vehicle Card */}
+                            <Link href={carId ? `/cars/${carId}` : '#'} className={`block ${!carId ? 'pointer-events-none' : ''}`}>
                               {/* Vehicle Image */}
                               <div className="relative h-40 bg-gray-200">
                                 {carData?.main_image ? (
@@ -221,16 +226,24 @@ export default function MyRequestPage() {
                                     src={carData.main_image}
                                     alt={carData.car_name || 'Vehicle'}
                                     fill
-                                  className="object-cover"
+                                    className={`object-cover ${isSoldout ? 'grayscale' : ''}`}
                                     unoptimized
                                   />
                                 ) : (
                                   <div className="absolute inset-0 flex items-center justify-center text-gray-400">
                                     <svg className="w-12 h-12" fill="none" stroke="currentColor" viewBox="0 0 24 24">
-                                    <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M4 16l4.586-4.586a2 2 0 012.828 0L16 16m-2-2l1.586-1.586a2 2 0 012.828 0L20 14m-6-6h.01M6 20h12a2 2 0 002-2V6a2 2 0 00-2-2H6a2 2 0 00-2 2v12a2 2 0 002 2z" />
+                                      <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M4 16l4.586-4.586a2 2 0 012.828 0L16 16m-2-2l1.586-1.586a2 2 0 012.828 0L20 14m-6-6h.01M6 20h12a2 2 0 002-2V6a2 2 0 00-2 2v12a2 2 0 002 2z" />
                                     </svg>
                                   </div>
                                 )}
+                                {/* Soldout Badge */}
+                                {isSoldout && (
+                                  <div className="absolute inset-0 flex items-center justify-center bg-black/30">
+                                    <span className="bg-red-600 text-white px-4 py-2 rounded-lg font-bold text-lg transform -rotate-12 shadow-lg">
+                                      {language === 'ko' ? '판매완료' : 'SOLD OUT'}
+                                    </span>
+                                  </div>
+                                )}
                               </div>
 
                               {/* Vehicle Info */}
@@ -263,6 +276,45 @@ export default function MyRequestPage() {
                                   </div>
                                 </div>
                               </div>
+                            </Link>
+
+                            {/* Action Buttons */}
+                            <div className="px-4 pb-4 flex gap-2">
+                              {isSoldout ? (
+                                <div className="flex-1 bg-gray-400 text-white text-sm py-2 px-3 rounded-lg text-center font-medium">
+                                  {language === 'ko' ? '판매완료' : 'Sold Out'}
+                                </div>
+                              ) : carId ? (
+                                <>
+                                  <button
+                                    type="button"
+                                    onClick={() => router.push(`/cars/${carId}?action=purchase`)}
+                                    className="flex-1 bg-primary-600 text-white text-sm py-2 px-3 rounded-lg hover:bg-primary-700 transition font-medium"
+                                  >
+                                    {language === 'ko' ? '구매하기' : 'Purchase'}
+                                  </button>
+                                  <button
+                                    type="button"
+                                    onClick={() => {
+                                      if (user?.is_dealer) {
+                                        router.push(`/cars/${carId}?action=recommend`);
+                                      } else {
+                                        alert(language === 'ko'
+                                          ? '딜러 회원만 지인 추천 기능을 사용할 수 있습니다. 딜러 등록을 원하시면 고객센터로 문의해주세요.'
+                                          : 'Only dealer members can use the referral feature. Please contact customer service to register as a dealer.');
+                                      }
+                                    }}
+                                    className="flex-1 bg-green-600 text-white text-sm py-2 px-3 rounded-lg hover:bg-green-700 transition font-medium"
+                                  >
+                                    {language === 'ko' ? '지인에게 추천' : 'Recommend to friend'}
+                                  </button>
+                                </>
+                              ) : (
+                                <div className="flex-1 bg-gray-300 text-gray-500 text-sm py-2 px-3 rounded-lg text-center font-medium">
+                                  {language === 'ko' ? '차량 정보 없음' : 'Vehicle unavailable'}
+                                </div>
+                              )}
+                            </div>
                           </div>
                         );
                       })}