style: 精简主题提示并优化分镜工具栏与分隔线

src/admin.css

@@ -851,6 +851,51 @@ body {
 .breakdown-results-scroll .n-scrollbar-content {
     overflow-wrap: anywhere;
 }
+/* 剧集选择、统计和下一步入口共用一行，避免空操作行与双层顶部留白。 */
+.breakdown-storyboard {
+    padding: 16px 20px 20px;
+}
+.breakdown-storyboard-toolbar {
+    display: flex;
+    align-items: center;
+    justify-content: space-between;
+    flex-wrap: wrap;
+    gap: 12px 24px;
+    margin-bottom: 16px;
+}
+.breakdown-episode-picker {
+    display: flex;
+    align-items: center;
+    gap: 12px;
+    flex: 0 1 420px;
+    min-width: 0;
+    font-size: 14px;
+}
+.breakdown-episode-picker > span {
+    flex-shrink: 0;
+    white-space: nowrap;
+}
+.breakdown-episode-picker .n-select {
+    flex: 1;
+    min-width: 0;
+}
+.breakdown-storyboard-summary {
+    display: flex;
+    align-items: center;
+    flex-wrap: wrap;
+    gap: 8px 20px;
+    min-height: 34px;
+    margin-left: auto;
+}
+.breakdown-storyboard-count {
+    color: var(--app-muted);
+    font-size: 12px;
+    white-space: nowrap;
+}
+.breakdown-storyboard-summary .text-button {
+    min-height: 34px;
+    white-space: nowrap;
+}
 /* 连续阅读区保留双栏，执行记录按需展开，不挤占默认阅读宽度。 */
 .script-section .n-tabs-tab__label {
     display: inline-flex;