refactor(layout): 重构侧边栏支持实时会话管理

- 集成 useConversations 和 useSettings hooks
- 实现新建会话功能并自动跳转
- 实现删除会话功能及确认交互
- 按时间分组显示会话列表（今天、昨天、更早）
- 添加加载状态和操作菜单
- 优化会话列表的交互体验

src/components/layout/Sidebar.tsx

@@ -1,21 +1,68 @@
 'use client';
 
 import Link from 'next/link';
-import { usePathname } from 'next/navigation';
-import { Plus, ChevronDown, PanelLeft } from 'lucide-react';
+import { usePathname, useRouter } from 'next/navigation';
+import { Plus, ChevronDown, PanelLeft, Trash2, MoreHorizontal, Loader2 } from 'lucide-react';
 import { Avatar } from '@/components/ui/Avatar';
 import { cn } from '@/lib/utils';
-import type { ChatHistory, User } from '@/types';
+import { useConversations } from '@/hooks/useConversations';
+import { useSettings } from '@/hooks/useSettings';
+import type { User } from '@/types';
+import type { Conversation } from '@/drizzle/schema';
+import { useState } from 'react';
 
 interface SidebarProps {
   user: User;
-  chatHistories: ChatHistory[];
+  chatHistories?: { id: string; title: string }[];  // 保持向后兼容
   isOpen?: boolean;
   onToggle?: () => void;
 }
 
-export function Sidebar({ user, chatHistories, isOpen = true }: SidebarProps) {
+export function Sidebar({ user, isOpen = true }: SidebarProps) {
   const pathname = usePathname();
+  const router = useRouter();
+  const { conversations, loading, createConversation, deleteConversation } = useConversations();
+  const { settings } = useSettings();
+  const [creatingChat, setCreatingChat] = useState(false);
+  const [menuOpen, setMenuOpen] = useState<string | null>(null);
+
+  // 创建新对话
+  const handleNewChat = async () => {
+    if (creatingChat) return;
+
+    try {
+      setCreatingChat(true);
+      const newConversation = await createConversation({
+        model: settings?.defaultModel || 'claude-sonnet-4-20250514',
+        tools: settings?.defaultTools || [],
+        enableThinking: settings?.enableThinking || false,
+      });
+      router.push(`/chat/${newConversation.conversationId}`);
+    } catch (error) {
+      console.error('Failed to create conversation:', error);
+    } finally {
+      setCreatingChat(false);
+    }
+  };
+
+  // 删除对话
+  const handleDeleteConversation = async (conversationId: string, e: React.MouseEvent) => {
+    e.preventDefault();
+    e.stopPropagation();
+    try {
+      await deleteConversation(conversationId);
+      setMenuOpen(null);
+      // 如果当前正在查看被删除的对话，跳转到首页
+      if (pathname === `/chat/${conversationId}`) {
+        router.push('/');
+      }
+    } catch (error) {
+      console.error('Failed to delete conversation:', error);
+    }
+  };
+
+  // 按时间分组对话
+  const groupedConversations = groupConversationsByTime(conversations);
 
   return (
     <>
@@ -33,53 +80,103 @@ export function Sidebar({ user, chatHistories, isOpen = true }: SidebarProps) {
 
         {/* 新建对话按钮 */}
         <div className="px-4 py-2">
-          <Link
-            href="/"
-            className="flex items-center gap-2 text-[var(--color-primary)] text-sm font-medium py-2 hover:opacity-80 transition-opacity"
+          <button
+            onClick={handleNewChat}
+            disabled={creatingChat}
+            className="flex items-center gap-2 text-[var(--color-primary)] text-sm font-medium py-2 hover:opacity-80 transition-opacity disabled:opacity-50"
           >
+            {creatingChat ? (
+              <Loader2 size={18} className="animate-spin" />
+            ) : (
               <Plus size={18} />
+            )}
             <span>New chat</span>
-          </Link>
-        </div>
-
-        {/* Recents 标签 */}
-        <div className="px-4 py-2">
-          <h2 className="text-xs font-medium text-[var(--color-text-tertiary)] uppercase tracking-wider mb-2">
-            Recents
-          </h2>
+          </button>
         </div>
 
         {/* 聊天列表 */}
         <nav className="flex-1 overflow-y-auto px-2 flex flex-col gap-1">
-          {chatHistories.map((chat) => {
-            const isActive = pathname === `/chat/${chat.id}`;
+          {loading ? (
+            <div className="flex items-center justify-center py-8">
+              <Loader2 size={20} className="animate-spin text-[var(--color-text-tertiary)]" />
+            </div>
+          ) : conversations.length === 0 ? (
+            <div className="px-3 py-4 text-sm text-[var(--color-text-tertiary)] text-center">
+              No conversations yet
+            </div>
+          ) : (
+            Object.entries(groupedConversations).map(([group, items]) => (
+              <div key={group}>
+                <h2 className="px-3 py-2 text-xs font-medium text-[var(--color-text-tertiary)] uppercase tracking-wider">
+                  {group}
+                </h2>
+                {items.map((conversation) => {
+                  const isActive = pathname === `/chat/${conversation.conversationId}`;
                   return (
+                    <div
+                      key={conversation.conversationId}
+                      className="relative group"
+                    >
                       <Link
-                key={chat.id}
-                href={`/chat/${chat.id}`}
+                        href={`/chat/${conversation.conversationId}`}
                         className={cn(
-                  'block px-3 py-2 rounded-lg text-sm cursor-pointer transition-colors truncate',
+                          'block px-3 py-2 rounded-lg text-sm cursor-pointer transition-colors truncate pr-8',
                           isActive
                             ? 'bg-[var(--color-bg-tertiary)] text-[var(--color-text-primary)]'
                             : 'text-[var(--color-text-secondary)] hover:bg-[var(--color-bg-hover)]'
                         )}
                       >
-                {chat.title}
+                        {conversation.title}
                       </Link>
+
+                      {/* 更多操作按钮 */}
+                      <button
+                        onClick={(e) => {
+                          e.preventDefault();
+                          e.stopPropagation();
+                          setMenuOpen(menuOpen === conversation.conversationId ? null : conversation.conversationId);
+                        }}
+                        className={cn(
+                          'absolute right-2 top-1/2 -translate-y-1/2 p-1 rounded opacity-0 group-hover:opacity-100 transition-opacity',
+                          'hover:bg-[var(--color-bg-hover)]'
+                        )}
+                      >
+                        <MoreHorizontal size={14} className="text-[var(--color-text-tertiary)]" />
+                      </button>
+
+                      {/* 下拉菜单 */}
+                      {menuOpen === conversation.conversationId && (
+                        <div className="absolute right-0 top-full mt-1 bg-white border border-[var(--color-border)] rounded-lg shadow-lg py-1 z-10 min-w-[120px]">
+                          <button
+                            onClick={(e) => handleDeleteConversation(conversation.conversationId, e)}
+                            className="w-full px-3 py-2 text-left text-sm text-red-600 hover:bg-red-50 flex items-center gap-2"
+                          >
+                            <Trash2 size={14} />
+                            删除
+                          </button>
+                        </div>
+                      )}
+                    </div>
                   );
                 })}
+              </div>
+            ))
+          )}
         </nav>
 
         {/* 用户信息 Footer */}
         <footer className="p-4 border-t border-[var(--color-border-light)] mt-auto">
-          <div className="flex items-center gap-3 p-2 rounded-lg cursor-pointer hover:bg-[var(--color-bg-hover)] transition-colors">
+          <Link
+            href="/settings"
+            className="flex items-center gap-3 p-2 rounded-lg cursor-pointer hover:bg-[var(--color-bg-hover)] transition-colors"
+          >
             <Avatar name={user.name} size="md" />
             <div className="flex-1 min-w-0">
               <div className="text-sm text-[var(--color-text-primary)] truncate">{user.email}</div>
               <div className="text-xs text-[var(--color-text-tertiary)] capitalize">{user.plan} plan</div>
             </div>
             <ChevronDown size={16} className="text-[var(--color-text-tertiary)]" />
-          </div>
+          </Link>
         </footer>
       </aside>
 
@@ -87,6 +184,7 @@ export function Sidebar({ user, chatHistories, isOpen = true }: SidebarProps) {
       {isOpen && (
         <div
           className="fixed inset-0 bg-black/20 z-40 md:hidden"
+          onClick={() => setMenuOpen(null)}
         />
       )}
     </>
@@ -105,3 +203,38 @@ export function SidebarToggle({ onClick }: { onClick?: () => void }) {
     </button>
   );
 }
+
+// 按时间分组对话
+function groupConversationsByTime(conversations: Conversation[]): Record<string, Conversation[]> {
+  const now = new Date();
+  const today = new Date(now.getFullYear(), now.getMonth(), now.getDate());
+  const yesterday = new Date(today.getTime() - 24 * 60 * 60 * 1000);
+  const weekAgo = new Date(today.getTime() - 7 * 24 * 60 * 60 * 1000);
+  const monthAgo = new Date(today.getTime() - 30 * 24 * 60 * 60 * 1000);
+
+  const groups: Record<string, Conversation[]> = {};
+
+  conversations.forEach((conversation) => {
+    const date = new Date(conversation.lastMessageAt || conversation.createdAt || now);
+    let group: string;
+
+    if (date >= today) {
+      group = 'Today';
+    } else if (date >= yesterday) {
+      group = 'Yesterday';
+    } else if (date >= weekAgo) {
+      group = 'Past 7 days';
+    } else if (date >= monthAgo) {
+      group = 'Past 30 days';
+    } else {
+      group = 'Older';
+    }
+
+    if (!groups[group]) {
+      groups[group] = [];
+    }
+    groups[group].push(conversation);
+  });
+
+  return groups;
+}