docs: improve sidebar content filtering and simplify CodeBlockTabs ren… (#7109)

Co-authored-by: Alex Yang <himself65@outlook.com>

docs/app/docs/[[...slug]]/page.tsx

@@ -81,7 +81,7 @@ export default async function Page({
 									{...props}
 									className="p-0 rounded-lg border-0 bg-fd-secondary"
 								>
-									<div {...props}>{props.children}</div>
+									{props.children}
 								</CodeBlockTabs>
 							);
 						},

docs/components/sidebar-content.tsx

@@ -71,12 +71,14 @@ function contentToPageTree(content: Content): PageTree.Folder {
 					url: content.href,
 				}
 			: undefined,
-		children: content.list.map((item) => ({
-			type: "page",
-			url: item.href,
-			name: item.title,
-			icon: <item.icon />,
-		})),
+		children: content.list
+			.filter((item) => !item.group && item.href)
+			.map((item) => ({
+				type: "page",
+				url: item.href,
+				name: item.title,
+				icon: <item.icon />,
+			})),
 	};
 }