feat：替换 Dify 为自建 RAG去实现

1、修复了若干无权限时的失败提示语
2、新增了一个生成后续建议问题的功能
3、重构了知识问答部分的权限管理模块
4、修复了若干渲染不恰当的样式渲染

app/components/dify-chat/sidebar.tsx

@@ -13,6 +13,7 @@ import { Button, Dropdown, Input, Layout, Menu, Modal, Tooltip, message, theme,
 import { forwardRef, useImperativeHandle, useMemo, useState } from 'react';
 import type { ChatApp } from '~/api/dify-chat-apps/types';
 import type { ConversationItem } from '~/api/dify-chat';
+import { usePermission } from '~/hooks/usePermission';
 import { deleteConversation, renameConversation } from '~/api/dify-chat';
 import '../../styles/components/chat-with-llm/sidebar.css';
 
@@ -32,6 +33,8 @@ interface ChatSidebarProps {
     currentChatApp: ChatApp | null;
     onChatAppChange: (appId: string) => void;
     onConversationRenamed?: (conversationId: string, newName: string) => void;
+    /** 会话列表权限被拒绝时，隐藏重命名/删除按钮 */
+    conversationReadOnly?: boolean;
 }
 
 // 暴露给父组件的方法接口
@@ -55,7 +58,10 @@ const ChatSidebar = forwardRef<ChatSidebarRef, ChatSidebarProps>(({
     onNewConversation,
     onConversationDeleted,
     onConversationRenamed,
+    conversationReadOnly = false,
 }, ref) => {
+    const { hasPermission } = usePermission();
+    const canDeleteConversation = hasPermission('dify:conversation:delete');
     const [searchValue, setSearchValue] = useState('');
     const [renameModalVisible, setRenameModalVisible] = useState(false);
     const [deleteModalVisible, setDeleteModalVisible] = useState(false);
@@ -208,24 +214,24 @@ const ChatSidebar = forwardRef<ChatSidebarRef, ChatSidebarProps>(({
                 <span className="truncate flex-1" title={conv.name}>
                     {conv.name}
                 </span>
-                {!collapsed && (
+                {!collapsed && (!conversationReadOnly || canDeleteConversation) && (
                     <Dropdown
                         menu={{
                             items: [
-                                {
+                                ...(!conversationReadOnly ? [{
                                     key: 'rename',
                                     icon: <EditOutlined />,
                                     label: '重命名',
                                     onClick: () => handleRename(conv),
-                                },
-                                {
+                                }] : []),
+                                ...(canDeleteConversation ? [{
                                     key: 'delete',
                                     icon: <DeleteOutlined />,
                                     label: '删除',
                                     danger: true,
                                     onClick: () => handleDeleteClick(conv),
-                                },
-                            ],
+                                }] : []),
+                            ].filter(Boolean),
                         }}
                         trigger={['click']}
                         placement="bottomRight"