Revert "style(admin): 统一标题层级与页面排版"

This reverts commit b1f7589538.

stash-web/src/App.css

@@ -787,67 +787,7 @@
 }
 
 .admin-form {
-  margin-top: 0;
-}
-
-.admin-form-narrow {
-  max-width: 820px;
-}
-
-/* 每个后台页面统一的标题区 */
-.admin-panel-head {
-  display: flex;
-  align-items: flex-start;
-  justify-content: space-between;
-  gap: var(--su-space-5);
-  padding-bottom: var(--su-space-4);
-  border-bottom: 1px solid var(--su-border);
-  margin-bottom: var(--su-space-2);
-}
-
-.admin-panel-heading {
-  min-width: 0;
-}
-
-.admin-panel-title {
-  margin: 0;
-  color: var(--su-text-main);
-  font-size: 20px;
-  font-weight: 700;
-  line-height: 1.3;
-  letter-spacing: -0.01em;
-}
-
-.admin-panel-desc {
-  max-width: 760px;
-  margin: var(--su-space-2) 0 0;
-  color: var(--su-text-muted);
-  font-size: var(--su-font-size-sm);
-  line-height: 1.65;
-}
-
-.admin-panel-actions {
-  display: flex;
-  flex: none;
-  flex-wrap: wrap;
-  align-items: center;
-  justify-content: flex-end;
-  gap: var(--su-space-2);
-}
-
-/* 表单标签统一加粗，避免组件默认字重在不同字体下发虚 */
-.admin-panel label {
-  font-weight: 600;
-}
-
-.admin-inline-actions {
-  display: flex;
-  gap: var(--su-space-2);
-}
-
-.admin-form-divider {
-  margin: var(--su-space-1) 0;
-  border-top: 1px dashed var(--su-border-strong);
+  margin-top: var(--su-space-5);
 }
 
 .admin-row {
@@ -956,7 +896,6 @@
 }
 
 .admin-actions {
-  max-width: 820px;
   margin-top: var(--su-space-6);
 }