修复作者昵称降级和关系列表无效链接

作者昵称仅使用补查结果，空名保留可访问的主页链接与关注操作
严格校验关系列表 tab，无效链接不请求列表并保留返回入口
纠正作者插槽注释，补充定向测试并同步工程文档和排障记忆

src/components/platform-entry/PlatformEntryActiveFlowShell.tsx

@@ -680,6 +680,7 @@ export function PlatformEntryFlowShellImpl({
     typeof window === 'undefined' ? '' : window.location.search,
   );
   const gameId = gameSearchParams.get('id');
+  const creatorConnectionTab = gameSearchParams.get('tab');
   const publishGameId = gameSearchParams.get('game');
   const avatarUrl = authUi?.user?.avatarUrl?.trim() || null;
   const avatarLabel = resolveActiveUserAvatarLabel(authUi?.user);
@@ -910,9 +911,10 @@ export function PlatformEntryFlowShellImpl({
                       <CreatorConnectionsPage
                         id={gameId}
                         tab={
-                          gameSearchParams.get('tab') === 'followers'
-                            ? 'followers'
-                            : 'following'
+                          creatorConnectionTab === 'following' ||
+                          creatorConnectionTab === 'followers'
+                            ? creatorConnectionTab
+                            : null
                         }
                         onOpenCreator={openCreator}
                         onOpenConnections={openCreatorConnections}