feat(web): tidy the channel sidebar and let owners delete groups

web/src/features/channel/Workspace.tsx

@@ -43,6 +43,7 @@ export function Workspace({ onCreateChannel }: { onCreateChannel: () => void })
   const setChannelHistory = useWorkspace(s => s.setChannelHistory);
   const createGroup = useWorkspace((s) => s.createGroup);
   const renameGroup = useWorkspace((s) => s.renameGroup);
+  const deleteGroup = useWorkspace((s) => s.deleteGroup);
   const groupThread = useWorkspace((s) => s.groupThread);
   const folders = useWorkspace((s) => s.folders);
   const sendText = useWorkspace((s) => s.sendText);
@@ -127,7 +128,7 @@ export function Workspace({ onCreateChannel }: { onCreateChannel: () => void })
   const rail = <SpaceRail id={channel?.id} onCreate={onCreateChannel} onJoin={() => setScanOpen(true)} />;
   const threadSidebar = <ThreadSidebar threads={threads} groups={groups} selectedThreadId={activeThreadId} enabled={Boolean(channel?.canManageStructure)} owner={channel?.role === 'owner'} onHistory={setChannelHistory}
     onSelectThread={(id) => { selectThread(id); setDrawerOpen(false); setMobileView('chat'); }} onCreateThread={createThread} onRenameThread={renameThread}
-    onCreateGroup={createGroup} onRenameGroup={renameGroup} onGroupThread={groupThread} />;
+    onCreateGroup={createGroup} onRenameGroup={renameGroup} onDeleteGroup={deleteGroup} onGroupThread={groupThread} />;
   const navigation = <><SpaceHeader />{threadSidebar}{desktop ? <Notepad /> : null}</>;
   const chat = <ChatPane threadName={activeThread?.name ?? '选择频道'} ids={messages} enabled={enabled} onSend={(text) => sendText(text, activeThreadId)} onDelete={deleteItem} onOpenFile={setPreviewId} onFiles={requestFiles} />;
   const explorer = <>