fix: 관리자 콘솔 모바일 UI 개선

- 화이트리스트 추가 버튼 레이아웃 수정 (shrink-0, items-center)
- 콘솔 로그 줄바꿈 추가 (break-all)
- 맨 아래로 스크롤 버튼 위치/스타일 개선 (녹색 그림자)
- 바텀 네비게이션 배경 불투명으로 변경

frontend/src/pages/Admin.jsx

@@ -1222,7 +1222,7 @@ export default function Admin({ isMobile = false }) {
                   {logs.map((log, index) => (
                     <div 
                       key={index} 
-                      className="leading-relaxed py-1 pl-3 mb-1"
+                      className="leading-relaxed py-1 pl-3 mb-1 break-all"
                       style={{ borderLeft: `3px solid ${getLogColorHex(log.type)}` }}
                     >
                       <span className={getLogColor(log.type)}>[{log.time}]</span>{' '}
@@ -1239,17 +1239,16 @@ export default function Admin({ isMobile = false }) {
                 {/* 맨 아래로 스크롤 버튼 */}
                 <AnimatePresence>
                   {!isAtBottom && logs.length > 0 && (
-                    <Tooltip content="맨 아래로 이동">
                     <motion.button
                       initial={{ opacity: 0, scale: 0.8 }}
                       animate={{ opacity: 1, scale: 1 }}
                       exit={{ opacity: 0, scale: 0.8 }}
                       onClick={scrollToBottom}
-                        className="absolute bottom-[88px] right-4 p-3 bg-mc-green hover:bg-mc-green/80 text-white rounded-full shadow-xl shadow-black/50 transition-colors z-10"
+                      className="absolute bottom-[88px] right-4 p-3 bg-mc-green hover:bg-mc-green text-white rounded-full transition-colors z-10"
+                      style={{ boxShadow: '0 0 16px rgba(76, 175, 80, 0.5)' }}
                     >
                       <ArrowDown size={20} />
                     </motion.button>
-                    </Tooltip>
                   )}
                 </AnimatePresence>
                 
@@ -1515,7 +1514,7 @@ export default function Admin({ isMobile = false }) {
                   </div>
                   
                   {/* 플레이어 추가 */}
-                  <div className="flex gap-2 mb-4">
+                  <div className="flex items-center gap-2 mb-4">
                     <input
                       type="text"
                       value={newWhitelistPlayer}
@@ -1526,11 +1525,11 @@ export default function Admin({ isMobile = false }) {
                         }
                       }}
                       placeholder="플레이어 이름 입력..."
-                      className="flex-1 bg-zinc-800 border border-zinc-700 rounded-lg px-3 py-2 text-white text-sm placeholder-zinc-500 focus:outline-none focus:border-mc-green/50"
+                      className="flex-1 min-w-0 bg-zinc-800 border border-zinc-700 rounded-lg px-3 py-2 text-white text-sm placeholder-zinc-500 focus:outline-none focus:border-mc-green/50"
                     />
                     <button
                       onClick={() => addWhitelistPlayer(newWhitelistPlayer)}
-                      className="px-4 py-2 bg-mc-green text-white rounded-lg font-medium hover:bg-mc-green/80 transition-colors text-sm"
+                      className="px-4 py-2 bg-mc-green text-white rounded-lg font-medium hover:bg-mc-green/80 transition-colors text-sm shrink-0 whitespace-nowrap"
                     >
                       추가
                     </button>
@@ -2149,7 +2148,7 @@ export default function Admin({ isMobile = false }) {
 
       {/* 모바일 바텀 네비게이션 */}
       {isMobile && (
-        <div className="fixed bottom-0 left-0 right-0 bg-zinc-900/95 backdrop-blur-lg border-t border-zinc-800 px-2 pb-safe z-50">
+        <div className="fixed bottom-0 left-0 right-0 bg-zinc-900 border-t border-zinc-800 px-2 pb-safe z-50">
           <div className="flex">
             {tabs.map(tab => (
               <button