refactor: Implement cdndania downloader with asyncio, type hints, and subprocess log streaming

templates/anime_downloader_log.html

@@ -20,11 +20,25 @@
         background-image: radial-gradient(circle at top right, #1e293b 0%, transparent 60%), radial-gradient(circle at bottom left, #1e293b 0%, transparent 60%);
         color: var(--text-color);
         font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
+        overflow: hidden; /* 외부 스크롤 방지 - 흔들림 해결 */
     }
 
     /* Container & Typography */
     .container-fluid {
-        padding: 40px;
+        padding: 8px; /* 최소 여백 */
+    }
+    
+    @media (max-width: 768px) {
+        .container-fluid {
+            padding: 4px; /* 모바일 더 작은 여백 */
+        }
+        .tab-pane {
+            padding: 8px;
+        }
+        .dashboard-card {
+            margin-top: 8px;
+            border-radius: 6px;
+        }
     }
 
     h1, h2, h3, h4, h5, h6 {
@@ -93,6 +107,9 @@
         width: 100%;
         box-shadow: inset 0 2px 4px 0 rgba(0, 0, 0, 0.5);
         resize: none; /* Disable manual resize */
+        overscroll-behavior: contain; /* 스크롤 체인 방지 */
+        transform: translateZ(0); /* GPU 가속화 */
+        will-change: scroll-position;
     }
 
     textarea#log:focus, textarea#add:focus {