fix: 收紧图库镜头导航并移除空白定位横条

src/admin.css

@@ -875,6 +875,18 @@ body {
 .form-image-toolbar.has-impact-picker {
     grid-template-columns: minmax(220px, 340px) minmax(0, 1fr);
 }
+.form-image-toolbar.has-impact-picker.has-impact-actions {
+    grid-template-columns: minmax(260px, 420px) minmax(0, 1fr);
+}
+.asset-impact-picker {
+    display: flex;
+    align-items: center;
+    gap: 8px;
+    min-width: 0;
+}
+.asset-impact-picker .asset-impact-select {
+    flex: 1 1 0;
+}
 .form-image-toolbar > * {
     min-width: 0;
 }
@@ -904,7 +916,8 @@ body {
     white-space: nowrap;
 }
 @container (max-width: 1200px) {
-    .form-image-toolbar.has-impact-picker {
+    .form-image-toolbar.has-impact-picker,
+    .form-image-toolbar.has-impact-picker.has-impact-actions {
         grid-template-columns: minmax(0, 1fr);
     }
 }
@@ -1482,8 +1495,12 @@ body {
 }
 /* 镜头影响和素材定位使用固定底色；高亮只表示当前定位，不代表素材失效。 */
 .asset-impact-context {
+    display: flex;
+    flex-direction: column;
+    gap: 10px;
     padding: 14px 16px;
     background: var(--app-subtle);
+    margin-bottom: 12px;
 }
 .asset-impact-select {
     min-width: 0;