feat: Phase 1-3 全部完成 — 沙盒增强、学情分析、学习路径

This commit is contained in:
yuzhiran-dev
2026-05-18 09:48:51 +08:00
commit 11bb86854c
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'use client';
import { useState, useRef, useEffect, FormEvent } from 'react';
import Link from 'next/link';
import { useAuth } from '@/lib/auth-context';
import { getToken, apiFetch } from '@/lib/auth';
import { AVAILABLE_MODELS, DEFAULT_MODEL } from '@/lib/models';
const API_BASE = process.env.NEXT_PUBLIC_API_URL || 'http://localhost:3000/api/v1';
interface Message {
role: 'system' | 'user' | 'assistant';
content: string;
}
interface SessionItem {
id: number;
conversationId: string;
model: string;
title: string;
updatedAt: string;
tokens: number;
}
const SCENES = [
{
id: 'general',
name: '通用对话',
icon: '💬',
desc: '日常问答,无所不谈',
systemPrompt: '你是一个智能 AI 助手,请友好、准确地回答用户的问题。',
starters: ['介绍一下你自己', '今天天气怎么样', '讲个笑话'],
},
{
id: 'coding',
name: '编程助手',
icon: '💻',
desc: '写代码、Debug、学编程',
systemPrompt: '你是一名资深软件工程师,擅长编程教学。请用清晰的代码示例和通俗的语言解释技术概念。回答时优先提供可运行的代码。',
starters: ['用 Python 写一个二分查找', 'React 和 Vue 有什么区别', '帮我 Debug 这段代码'],
},
{
id: 'writing',
name: '写作助手',
icon: '✍️',
desc: '文章、文案、报告润色',
systemPrompt: '你是一名专业的写作顾问,擅长各类文体写作。请根据用户需求提供高质量的文字内容,注意逻辑清晰、表达准确。',
starters: ['帮我写一篇产品介绍', '润色这段文字', '写一封工作邮件'],
},
{
id: 'study',
name: '学习辅导',
icon: '📚',
desc: '概念讲解、知识总结',
systemPrompt: '你是一名耐心且知识渊博的老师。请用通俗易懂的方式解释复杂概念,善用类比和例子,鼓励用户深入提问。',
starters: ['解释什么是机器学习', '讲一下 TCP/IP 协议', '怎么理解量子计算'],
},
{
id: 'english',
name: '英语学习',
icon: '🌍',
desc: '翻译、语法、口语练习',
systemPrompt: 'You are an English tutor. Help users improve their English. Respond primarily in Chinese but provide English examples. Correct grammar and offer better expressions.',
starters: ['"However" 和 "Although" 的区别', '帮我翻译这段话', '检查语法错误'],
},
];
function buildSystemMessages(sceneId: string): Message[] {
const scene = SCENES.find(s => s.id === sceneId) || SCENES[0];
return [{ role: 'system', content: scene.systemPrompt }];
}
function extractCodeBlocks(content: string): string[] {
const blocks: string[] = [];
const regex = /```(?:\w+)?\n([\s\S]*?)```/g;
let match;
while ((match = regex.exec(content)) !== null) {
const code = match[1].trim();
if (code.length > 0) blocks.push(code);
}
return blocks;
}
function formatTime(dateStr: string) {
const d = new Date(dateStr);
const now = new Date();
const diff = now.getTime() - d.getTime();
if (diff < 60000) return '刚刚';
if (diff < 3600000) return `${Math.floor(diff / 60000)} 分钟前`;
if (diff < 86400000) return `${Math.floor(diff / 3600000)} 小时前`;
return `${d.getMonth() + 1}/${d.getDate()} ${d.getHours().toString().padStart(2, '0')}:${d.getMinutes().toString().padStart(2, '0')}`;
}
export default function SandboxPage() {
const [messages, setMessages] = useState<Message[]>([
{ role: 'assistant', content: '你好!我是宇之然 AI 助手。你可以问我任何问题,我会尽力帮你解答。\n\n试试问我关于 AI、编程、写作、办公效率等方面的问题!' },
]);
const [input, setInput] = useState('');
const [model, setModel] = useState(DEFAULT_MODEL);
const [scene, setScene] = useState('general');
const [sending, setSending] = useState(false);
const [showParams, setShowParams] = useState(false);
const [temperature, setTemperature] = useState(0.7);
const [topP, setTopP] = useState(1);
const [maxTokens, setMaxTokens] = useState(2000);
const [quota, setQuota] = useState<{ used: number; remaining: number } | null>(null);
const [sessions, setSessions] = useState<SessionItem[]>([]);
const [sessionsOpen, setSessionsOpen] = useState(false);
const [searchQuery, setSearchQuery] = useState('');
const [conversationId, setConversationId] = useState(() => crypto.randomUUID());
const [sessionFeedback, setSessionFeedback] = useState<Record<number, string | null>>({});
const [currentSessionId, setCurrentSessionId] = useState<number | null>(null);
const messagesEndRef = useRef<HTMLDivElement>(null);
const messagesContainerRef = useRef<HTMLDivElement>(null);
const { isLoggedIn } = useAuth();
useEffect(() => {
const tk = getToken();
if (tk) {
fetch(`${API_BASE}/sandbox/quota`, {
headers: { Authorization: `Bearer ${tk}` },
}).then(r => r.json()).then(data => {
if (data.remaining !== undefined) setQuota(data);
}).catch(() => {});
loadSessions(tk);
}
}, [isLoggedIn]);
useEffect(() => {
if (messages.some(m => m.role === 'user') && messagesContainerRef.current) {
messagesContainerRef.current.scrollTop = messagesContainerRef.current.scrollHeight;
}
}, [messages]);
function loadSessions(tk?: string) {
const token = tk || getToken();
if (!token) return;
const params = searchQuery ? `?search=${encodeURIComponent(searchQuery)}` : '';
fetch(`${API_BASE}/sandbox/sessions${params}`, {
headers: { Authorization: `Bearer ${token}` },
}).then(r => r.json()).then(data => {
if (data.items) setSessions(data.items);
}).catch(() => {});
}
function handleSceneChange(sceneId: string) {
const s = SCENES.find(x => x.id === sceneId);
if (!s) return;
setScene(sceneId);
setMessages([
{ role: 'assistant', content: `欢迎来到 **${s.name}** 模式!${s.desc}。试试下面的问题,或者直接输入你的问题吧。` },
]);
}
async function handleSend(e: FormEvent) {
e.preventDefault();
const text = input.trim();
if (!text || sending) return;
const userMsg: Message = { role: 'user', content: text };
setMessages(prev => [...prev, userMsg]);
setInput('');
setSending(true);
try {
const tk = getToken();
let reply = '';
if (tk) {
const scenePrefix = buildSystemMessages(scene);
const apiMessages = [
...scenePrefix,
...messages,
userMsg,
].map(m => ({ role: m.role, content: m.content }));
const res = await fetch(`${API_BASE}/sandbox/chat`, {
method: 'POST',
headers: {
'Content-Type': 'application/json',
Authorization: `Bearer ${tk}`,
},
body: JSON.stringify({ conversationId, model, messages: apiMessages, temperature, top_p: topP, max_tokens: maxTokens }),
});
const data = await res.json();
if (!res.ok) throw new Error(data.message || '请求失败');
reply = data.reply;
if (data.conversationId) setConversationId(data.conversationId);
if (data.sessionId) {
setCurrentSessionId(data.sessionId);
if (!(data.sessionId in sessionFeedback)) {
setSessionFeedback(prev => ({ ...prev, [data.sessionId]: null }));
}
}
if (quota) setQuota({ ...quota, used: quota.used + 1, remaining: quota.remaining - 1 });
loadSessions(tk);
} else {
await new Promise(r => setTimeout(r, 600));
reply = mockReply(text);
}
setMessages(prev => [...prev, { role: 'assistant', content: reply }]);
} catch (e: any) {
if (e.message.includes('今日沙箱使用次数已用完')) {
setMessages(prev => [...prev, { role: 'assistant', content: '今日沙箱使用次数已用完。' + (isLoggedIn ? '' : ' 登录后可获得更多使用次数。') }]);
} else if (e.message.includes('未登录') || e.message.includes('Unauthorized')) {
setMessages(prev => [...prev, { role: 'assistant', content: '登录已过期,请重新登录后再试。' }]);
} else {
setMessages(prev => [...prev, { role: 'assistant', content: `出错啦:${e.message}` }]);
}
} finally {
setSending(false);
}
}
async function loadSession(sessionId: number) {
const tk = getToken();
if (!tk) return;
try {
const res = await fetch(`${API_BASE}/sandbox/sessions/${sessionId}`, {
headers: { Authorization: `Bearer ${tk}` },
});
const data = await res.json();
if (data.messages) {
setMessages(data.messages.filter((m: any) => m.role !== 'system'));
setModel(data.model);
setConversationId(data.conversationId);
setCurrentSessionId(data.id);
setSessionFeedback(prev => ({ ...prev, [data.id]: data.feedback || null }));
}
} catch {}
}
async function deleteSession(sessionId: number) {
const tk = getToken();
if (!tk) return;
try {
await fetch(`${API_BASE}/sandbox/sessions/${sessionId}`, {
method: 'DELETE',
headers: { Authorization: `Bearer ${tk}` },
});
setSessions(prev => prev.filter(s => s.id !== sessionId));
} catch {}
}
function newChat() {
const s = SCENES.find(x => x.id === scene) || SCENES[0];
setConversationId(crypto.randomUUID());
setCurrentSessionId(null);
setMessages([
{ role: 'assistant', content: `欢迎来到 **${s.name}** 模式!${s.desc}。试试下面的问题,或者直接输入你的问题吧。` },
]);
}
async function handleFeedback(sessionId: number, value: 'LIKE' | 'DISLIKE') {
const tk = getToken();
if (!tk) return;
const newVal = sessionFeedback[sessionId] === value ? null : value;
setSessionFeedback(prev => ({ ...prev, [sessionId]: newVal }));
try {
await fetch(`${API_BASE}/sandbox/sessions/${sessionId}/feedback`, {
method: 'PATCH',
headers: {
'Content-Type': 'application/json',
Authorization: `Bearer ${tk}`,
},
body: JSON.stringify({ feedback: newVal }),
});
} catch {}
}
const currentScene = SCENES.find(s => s.id === scene) || SCENES[0];
const isNewChat = messages.length <= 1 && messages[0]?.role === 'assistant';
return (
<div className="max-w-6xl mx-auto px-4 sm:px-6 lg:px-8 py-8">
<div className="flex items-center justify-between mb-4">
<div className="flex items-center gap-3">
<button onClick={() => setSessionsOpen(!sessionsOpen)}
className="lg:hidden p-2 text-muted-foreground hover:text-foreground rounded-lg hover:bg-accent">
<svg className="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
<path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M4 6h16M4 12h16M4 18h16" />
</svg>
</button>
<div>
<h1 className="text-2xl font-bold text-foreground">AI </h1>
<p className="text-sm text-muted-foreground mt-0.5">线 AI </p>
</div>
</div>
<div className="flex items-center gap-3">
<select value={model} onChange={e => setModel(e.target.value)}
className="px-3 py-1.5 border border-border rounded-lg text-sm bg-background focus:outline-none focus:border-brand-400">
{AVAILABLE_MODELS.map(m => <option key={m.id} value={m.id}>{m.label}</option>)}
</select>
{!isLoggedIn && (
<Link href="/auth"
className="px-4 py-1.5 text-sm font-medium text-brand-600 border border-brand-200 rounded-lg hover:bg-brand-50">
使
</Link>
)}
</div>
</div>
<div className="flex gap-4">
{isLoggedIn && (
<>
<div className={`${sessionsOpen ? 'fixed inset-0 z-40 bg-black/50 lg:static lg:bg-transparent' : 'hidden'} lg:block lg:w-72 shrink-0`}>
<div className={`${sessionsOpen ? 'fixed left-0 top-0 bottom-0 w-80 z-50' : ''} lg:static lg:w-72 bg-card border border-border rounded-2xl overflow-hidden flex flex-col`} style={{ maxHeight: '75vh' }}>
<div className="p-3 border-b border-border flex items-center justify-between">
<span className="text-sm font-medium text-foreground"></span>
<button onClick={newChat}
className="text-xs px-3 py-1 bg-brand-600 text-white rounded-lg hover:bg-brand-700">
</button>
</div>
<div className="p-2 border-b border-border">
<input type="text" value={searchQuery} onChange={e => setSearchQuery(e.target.value)}
placeholder="搜索历史..." onKeyDown={e => { if (e.key === 'Enter') loadSessions(); }}
className="w-full px-3 py-1.5 bg-background border border-border rounded-lg text-xs focus:outline-none focus:border-brand-400" />
</div>
<div className="flex-1 overflow-y-auto">
{sessions.length === 0 ? (
<div className="p-4 text-center text-xs text-muted-foreground">
</div>
) : sessions.map(s => (
<div key={s.id} onClick={() => { loadSession(s.id); setSessionsOpen(false); }}
className="group px-3 py-2.5 hover:bg-accent cursor-pointer border-b border-border/50">
<div className="text-xs font-medium text-foreground truncate">{s.title}</div>
<div className="flex items-center justify-between mt-1">
<span className="text-[10px] text-muted-foreground">{formatTime(s.updatedAt)} · {s.model}</span>
<button onClick={e => { e.stopPropagation(); deleteSession(s.id); }}
className="opacity-0 group-hover:opacity-100 text-[10px] text-red-500 hover:text-red-700">
</button>
</div>
</div>
))}
</div>
</div>
{sessionsOpen && (
<div className="fixed inset-0 z-40 lg:hidden" onClick={() => setSessionsOpen(false)} />
)}
</div>
</>
)}
<div className="flex-1 min-w-0">
<div className="flex gap-2 mb-4 overflow-x-auto pb-1">
{SCENES.map(s => (
<button key={s.id} onClick={() => handleSceneChange(s.id)}
className={`flex items-center gap-1.5 px-3 py-1.5 rounded-xl text-xs font-medium whitespace-nowrap border transition-colors shrink-0 ${
scene === s.id
? 'bg-brand-600 text-white border-brand-600'
: 'bg-card text-muted-foreground border-border hover:border-brand-400 hover:text-foreground'
}`}>
<span>{s.icon}</span>
<span>{s.name}</span>
</button>
))}
</div>
<div className="flex items-center justify-between mb-2">
<div />
<button onClick={() => setShowParams(!showParams)}
className={`flex items-center gap-1.5 px-3 py-1 text-xs font-medium rounded-lg border transition-colors ${
showParams
? 'bg-accent text-foreground border-border'
: 'text-muted-foreground border-border hover:text-foreground hover:bg-accent'
}`}>
<svg className={`w-3.5 h-3.5 transition-transform ${showParams ? 'rotate-180' : ''}`} fill="none" stroke="currentColor" viewBox="0 0 24 24">
<path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M12 6V4m0 2a2 2 0 100 4m0-4a2 2 0 110 4m-6 8a2 2 0 100-4m0 4a2 2 0 110-4m0 4v2m0-6V4m6 6v10m6-2a2 2 0 100-4m0 4a2 2 0 110-4m0 4v2m0-6V4" />
</svg>
</button>
</div>
{showParams && (
<div className="bg-card border border-border rounded-xl p-4 mb-3 space-y-3">
<div>
<div className="flex items-center justify-between mb-1">
<label className="text-xs font-medium text-foreground">Temperature</label>
<span className="text-xs text-muted-foreground tabular-nums">{temperature.toFixed(1)}</span>
</div>
<input type="range" min="0" max="2" step="0.1" value={temperature}
onChange={e => setTemperature(parseFloat(e.target.value))}
className="w-full h-1.5 bg-muted rounded-full appearance-none cursor-pointer accent-brand-600" />
<div className="flex justify-between text-[10px] text-muted-foreground mt-0.5">
<span> (0)</span>
<span> (2)</span>
</div>
</div>
<div>
<div className="flex items-center justify-between mb-1">
<label className="text-xs font-medium text-foreground">Top P</label>
<span className="text-xs text-muted-foreground tabular-nums">{topP.toFixed(2)}</span>
</div>
<input type="range" min="0" max="1" step="0.05" value={topP}
onChange={e => setTopP(parseFloat(e.target.value))}
className="w-full h-1.5 bg-muted rounded-full appearance-none cursor-pointer accent-brand-600" />
<div className="flex justify-between text-[10px] text-muted-foreground mt-0.5">
<span> (0)</span>
<span> (1)</span>
</div>
</div>
<div>
<div className="flex items-center justify-between mb-1">
<label className="text-xs font-medium text-foreground">Max Tokens</label>
<span className="text-xs text-muted-foreground tabular-nums">{maxTokens}</span>
</div>
<input type="range" min="100" max="8192" step="100" value={maxTokens}
onChange={e => setMaxTokens(parseInt(e.target.value))}
className="w-full h-1.5 bg-muted rounded-full appearance-none cursor-pointer accent-brand-600" />
<div className="flex justify-between text-[10px] text-muted-foreground mt-0.5">
<span> (100)</span>
<span> (8192)</span>
</div>
</div>
</div>
)}
<div className="bg-card rounded-2xl border border-border shadow-sm overflow-hidden flex flex-col" style={{ maxHeight: '65vh' }}>
<div ref={messagesContainerRef} className="flex-1 overflow-y-auto p-4 space-y-4">
{isNewChat && (
<div className="flex flex-wrap gap-2 mb-4">
{currentScene.starters.map((q, i) => (
<button key={i} onClick={() => setInput(q)}
className="px-3 py-1.5 text-xs bg-muted text-muted-foreground rounded-full border border-border hover:bg-accent hover:text-foreground transition-colors">
{q}
</button>
))}
</div>
)}
{messages.map((msg, i) => {
if (msg.role === 'system') return null;
const isLastAssistant = msg.role === 'assistant' && i === messages.length - 1;
return (
<div key={i}>
<div className={`flex items-start gap-3 ${msg.role === 'user' ? 'justify-end' : ''}`}>
{msg.role === 'assistant' && (
<div className="w-8 h-8 bg-brand-600 rounded-xl flex items-center justify-center text-white text-sm font-bold shrink-0">Y</div>
)}
<div className={`max-w-[75%] rounded-2xl px-4 py-2.5 text-sm leading-relaxed whitespace-pre-wrap ${
msg.role === 'user'
? 'bg-brand-600 text-white rounded-tr-none'
: 'bg-muted text-foreground rounded-tl-none'
}`}>
{msg.content}
</div>
{msg.role === 'user' && (
<div className="w-8 h-8 bg-muted-foreground/20 rounded-xl flex items-center justify-center text-xs font-bold shrink-0"></div>
)}
</div>
{msg.role === 'assistant' && currentSessionId && isLastAssistant && (
<div className="flex items-center gap-2 mt-1 ml-11">
<button onClick={() => handleFeedback(currentSessionId, 'LIKE')}
className={`text-xs px-2 py-1 rounded-full border transition-colors ${
sessionFeedback[currentSessionId] === 'LIKE'
? 'bg-green-500/10 text-green-600 border-green-300'
: 'text-muted-foreground border-border hover:border-green-300 hover:text-green-600'
}`}>
</button>
<button onClick={() => handleFeedback(currentSessionId, 'DISLIKE')}
className={`text-xs px-2 py-1 rounded-full border transition-colors ${
sessionFeedback[currentSessionId] === 'DISLIKE'
? 'bg-red-500/10 text-red-600 border-red-300'
: 'text-muted-foreground border-border hover:border-red-300 hover:text-red-600'
}`}>
</button>
</div>
)}
{msg.role === 'assistant' && extractCodeBlocks(msg.content).length > 0 && (
<div className="flex flex-wrap gap-2 mt-2 ml-11">
{extractCodeBlocks(msg.content).map((code, ci) => (
<button key={ci} onClick={() => {
const encoded = btoa(code);
window.open(`/sandbox/code?code=${encoded}`, '_blank');
}}
className="text-xs px-2.5 py-1 rounded-full border border-border text-brand-600 hover:bg-accent transition-colors">
</button>
))}
</div>
)}
</div>
);
})}
{sending && (
<div className="flex items-start gap-3">
<div className="w-8 h-8 bg-brand-600 rounded-xl flex items-center justify-center text-white text-sm font-bold shrink-0">Y</div>
<div className="bg-muted rounded-2xl rounded-tl-none px-4 py-2.5">
<span className="inline-flex gap-1">
<span className="w-2 h-2 bg-muted-foreground/40 rounded-full animate-bounce" style={{ animationDelay: '0ms' }} />
<span className="w-2 h-2 bg-muted-foreground/40 rounded-full animate-bounce" style={{ animationDelay: '150ms' }} />
<span className="w-2 h-2 bg-muted-foreground/40 rounded-full animate-bounce" style={{ animationDelay: '300ms' }} />
</span>
</div>
</div>
)}
{!sending && messages.length > 2 && (
<div className="flex justify-end">
<button onClick={() => {
const lastAssistantMsg = [...messages].reverse().find(m => m.role === 'assistant');
if (lastAssistantMsg) shareToCommunity(lastAssistantMsg.content);
}} className="text-xs text-brand-600 hover:underline">
</button>
</div>
)}
<div ref={messagesEndRef} />
</div>
<div className="border-t border-border p-4">
{quota && (
<div className="text-xs text-muted-foreground mb-2">
{quota.used} {quota.remaining}
</div>
)}
<form onSubmit={handleSend} className="flex gap-2">
<input type="text" value={input} onChange={e => setInput(e.target.value)}
placeholder="输入你的问题..." disabled={sending}
className="flex-1 px-4 py-2.5 bg-background border border-input rounded-xl text-sm focus:outline-none focus:ring-2 focus:ring-ring disabled:opacity-50" />
<button type="submit" disabled={sending || !input.trim()}
className="px-5 py-2.5 bg-brand-600 text-white text-sm font-medium rounded-xl hover:bg-brand-700 disabled:opacity-50">
{sending ? '发送中' : '发送'}
</button>
</form>
</div>
</div>
<div className="mt-4 text-center text-xs text-muted-foreground">
AI {!isLoggedIn && ' 登录后可获得更多使用次数和更多模型选择。'}
</div>
</div>
</div>
</div>
);
async function shareToCommunity(content: string, title?: string) {
if (!getToken()) {
alert('请先登录');
return;
}
try {
await apiFetch('/community/posts', {
method: 'POST',
body: JSON.stringify({
title: title || `AI对话分享 - ${new Date().toLocaleDateString()}`,
content: `【AI沙箱对话分享】\n\n${content}\n\n---\n来自宇之然AI沙箱`,
tags: '沙箱分享,AI对话',
}),
});
alert('分享成功!');
} catch {
alert('分享失败');
}
}
}
function mockReply(text: string): string {
const replies: Record<string, string> = {
: '你好!我是宇之然 AI 助手,很高兴为你服务!有什么我可以帮助你的吗?',
hello: 'Hello! I am YuZhiRan AI assistant. How can I help you today?',
};
for (const [key, reply] of Object.entries(replies)) {
if (text.toLowerCase().includes(key)) return reply;
}
if (text.includes('提示词') || text.includes('prompt')) {
return '好的提示词需要明确角色、任务、输出格式和约束条件。例如:\n\n> 你是一名专业的文案编辑,请帮我优化以下产品描述,要求语言简洁有力,突出产品核心卖点,控制在200字以内。\n\n你也可以在提示词库中找到更多精选模板!';
}
if (text.includes('模型') || text.includes('大模型')) {
return '目前主流的 AI 大模型包括:\n\n• **GPT-4** — OpenAI,综合能力最强\n• **Claude 3.5** — Anthropic,长文本分析出色\n• **Gemini** — Google,多模态能力强\n• **DeepSeek-V3** — 国产开源,性价比高\n• **通义千问** — 阿里云,中文理解优秀\n• **文心一言** — 百度,中文生态完善\n\n各模型在语言理解、代码生成、逻辑推理等方面各有优势,建议根据具体任务选择。';
}
if (text.includes('Python') || text.includes('代码')) {
return '以下是一个 Python 示例代码:\n\n```python\ndef fibonacci(n):\n """生成斐波那契数列的前 n 项"""\n a, b = 0, 1\n result = []\n for _ in range(n):\n result.append(a)\n a, b = b, a + b\n return result\n\nprint(fibonacci(10))\n```\n\n你可以将代码复制到本地运行,或在沙盒中进一步调试。';
}
if (text.includes('AI') || text.includes('人工智能')) {
return '人工智能(AI)是计算机科学的一个重要分支,旨在创建能够模拟人类智能的系统。\n\n**主要分支:**\n• 机器学习 — 让计算机从数据中学习\n• 深度学习 — 使用多层神经网络的机器学习\n• 自然语言处理 — 理解和生成人类语言\n• 计算机视觉 — 理解和分析图像\n\n想了解更多,可以查看我们的 AI 通识课程!';
}
return `关于"${text.slice(0, 30)}..."这个问题,我是宇之然 AI 助手。当前处于演示模式,我的回答能力有限。\n\n**建议:**\n1. 登录后使用更多模型获得更好的回答\n2. 在提示词库中查找相关模板\n3. 学习 AI 通识课程系统提升\n\n有什么我可以进一步帮助你的吗?`;
}