fix: 修复字段映射区域滚动高度

frontend/src/styles.css

@@ -1239,6 +1239,8 @@ select {
 
 .settings-rules-grid {
   grid-template-columns: minmax(280px, 0.72fr) minmax(0, 1.4fr);
+  grid-template-rows: minmax(0, 1fr);
+  align-items: stretch;
   height: 100%;
   min-height: 0;
   overflow: hidden;
@@ -1271,8 +1273,8 @@ select {
 }
 
 .field-mapping-card {
-  display: flex;
-  height: min(520px, calc(100vh - 250px));
+  display: flex !important;
+  height: 100%;
   min-height: 0;
   min-width: 0;
   flex-direction: column;
@@ -1292,7 +1294,10 @@ select {
 }
 
 .field-mapping-card > .n-card__content {
-  flex: 1 1 auto;
+  display: flex;
+  flex: 1 1 0;
+  flex-direction: column;
+  height: 0;
   min-height: 0;
   max-height: none;
   padding: 12px 16px;
@@ -1349,13 +1354,16 @@ select {
 .field-mapping-scroll {
   display: flex;
   flex: 1 1 auto;
-  height: 100%;
+  height: auto;
   max-height: none;
   min-height: 0;
   flex-direction: column;
   gap: 12px;
   padding: 0 4px 4px 0;
-  overflow: auto;
+  overflow-x: hidden;
+  overflow-y: scroll;
+  scrollbar-color: var(--td-scrollbar-color) transparent;
+  scrollbar-width: thin;
 }
 
 .field-mapping-scroll::-webkit-scrollbar {
@@ -1596,7 +1604,8 @@ select {
   }
 
   .field-mapping-card {
-    height: 520px;
+    height: 100%;
+    min-height: 520px;
   }
 }