fix(mobile): tab is not at bottom in tag detail page when empty (#11723)

packages/frontend/core/src/mobile/views/all-docs/doc/list.css.ts

@@ -30,3 +30,7 @@ export const groups = style({
   flexDirection: 'column',
   gap: 32,
 });
+export const emptySpaceY = style({
+  height: 0,
+  flexGrow: 1,
+});

packages/frontend/core/src/mobile/views/all-docs/doc/list.tsx

@@ -79,7 +79,12 @@ export const AllDocList = ({
   // }, [finalPageMetas, groupDefs]);
 
   if (!finalPageMetas.length) {
-    return <EmptyDocs absoluteCenter tagId={tag?.id} />;
+    return (
+      <>
+        <EmptyDocs absoluteCenter tagId={tag?.id} />
+        <div className={styles.emptySpaceY} />
+      </>
+    );
   }
 
   // return (