백테스팅 목록 아이템 삭제 기능추가

frontend/src/styles/backtestDashboard.css

@@ -1353,16 +1353,59 @@
 }
 
 .btd-history-card {
+  display: flex;
+  align-items: stretch;
+  gap: 2px;
   width: 100%;
   text-align: left;
   border: 1px solid var(--btd-divider);
   border-radius: 8px;
   background: var(--btd-surface);
-  padding: 10px;
-  cursor: pointer;
+  padding: 0;
   transition: border-color 0.15s, box-shadow 0.15s;
 }
 
+.btd-history-card-body {
+  flex: 1;
+  min-width: 0;
+  border: none;
+  background: transparent;
+  padding: 10px;
+  text-align: left;
+  cursor: pointer;
+  color: inherit;
+  font: inherit;
+}
+
+.btd-history-card-delete {
+  flex-shrink: 0;
+  align-self: center;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  width: 28px;
+  height: 28px;
+  margin-right: 6px;
+  padding: 0;
+  border: none;
+  border-radius: 6px;
+  background: transparent;
+  color: var(--btd-text-muted, #787b86);
+  cursor: pointer;
+  opacity: 0.72;
+  transition: color 0.15s, background 0.15s, opacity 0.15s;
+}
+
+.btd-history-card:hover .btd-history-card-delete,
+.btd-history-card--active .btd-history-card-delete {
+  opacity: 1;
+}
+
+.btd-history-card-delete:hover {
+  color: var(--btd-bear, #ef5350);
+  background: color-mix(in srgb, var(--btd-bear, #ef5350) 14%, transparent);
+}
+
 .btd-history-card:hover {
   border-color: color-mix(in srgb, var(--btd-gold) 35%, var(--btd-divider));
 }