perf: page componet supports custom height offset for flexible content height … (#6081)

* perf: Page supports custom height offset for flexible content height control.

允许通过 height 属性调整页面内容高度计算。修改了 Page 组件以支持自定义高度偏移量，用于更灵活的内容高度控制。

* chore: typo

* perf(page): replace height with heightOffset for flexible content sizing

The `height` prop was replaced with `heightOffset` to better describe its purpose when used with `autoContentHeight`. The new prop allows custom offset values (in pixels) to adjust content area sizing, with clearer documentation.

packages/effects/common-ui/src/components/page/page.vue

@@ -12,7 +12,8 @@ defineOptions({
   name: 'Page',
 });
 
-const { autoContentHeight = false } = defineProps<PageProps>();
+const { autoContentHeight = false, heightOffset = 0 } =
+  defineProps<PageProps>();
 
 const headerHeight = ref(0);
 const footerHeight = ref(0);
@@ -24,7 +25,7 @@ const footerRef = useTemplateRef<HTMLDivElement>('footerRef');
 const contentStyle = computed<StyleValue>(() => {
   if (autoContentHeight) {
     return {
-      height: `calc(var(${CSS_VARIABLE_LAYOUT_CONTENT_HEIGHT}) - ${headerHeight.value}px)`,
+      height: `calc(var(${CSS_VARIABLE_LAYOUT_CONTENT_HEIGHT}) - ${headerHeight.value}px - ${typeof heightOffset === 'number' ? `${heightOffset}px` : heightOffset})`,
       overflowY: shouldAutoHeight.value ? 'auto' : 'unset',
     };
   }

packages/effects/common-ui/src/components/page/types.ts

@@ -8,4 +8,10 @@ export interface PageProps {
   autoContentHeight?: boolean;
   headerClass?: string;
   footerClass?: string;
+  /**
+   * Custom height offset value (in pixels) to adjust content area sizing
+   * when used with autoContentHeight
+   * @default 0
+   */
+  heightOffset?: number;
 }