fix: 对话配置扁平化+启用联网搜索移到对话配置

对话配置改为单配置：
- 只有一个默认配置，所有用户共用
- 去掉添加/删除配置按钮和逻辑
- 直接编辑保存配置

配置参数扁平化：
- enable_search 启用联网搜索开关
- LLM配置、可用工具、历史记录数、Temperature、系统提示词

启用联网搜索开关：
- 从系统设置移到对话配置页面
- 开关自动添加/移除 search 工具

系统设置简化：
- 去掉启用联网搜索开关
- 提示用户去对话配置页面设置

.gitignore

@@ -0,0 +1,12 @@
+__pycache__/
+*.pyc
+*.pyo
+*.pyd
+.Python
+*.so
+*.egg-info/
+dist/
+build/
+*.db
+data.db
+node_modules/

backend/app.py

@@ -0,0 +1,691 @@
+#!/usr/bin/env python3
+"""
+AI Chat App - 后台管理服务
+端口: 19020 (与前端同一端口)
+"""
+
+from flask import Flask, jsonify, request, send_from_directory
+from flask_cors import CORS
+import os
+import json
+import sqlite3
+from datetime import datetime
+import hashlib
+
+app = Flask(__name__, static_folder='../www')
+CORS(app)
+
+# 数据库路径
+DB_PATH = os.path.join(os.path.dirname(__file__), 'data.db')
+
+# 管理员账户（默认）
+ADMIN_USERNAME = 'admin'
+ADMIN_PASSWORD_HASH = hashlib.sha256('admin123'.encode()).hexdigest()
+
+
+def get_db():
+    """获取数据库连接"""
+    conn = sqlite3.connect(DB_PATH)
+    conn.row_factory = sqlite3.Row
+    return conn
+
+
+def init_db():
+    """初始化数据库"""
+    conn = get_db()
+    cursor = conn.cursor()
+    
+    # 大模型接口配置表
+    cursor.execute('''
+        CREATE TABLE IF NOT EXISTS llm_configs (
+            id INTEGER PRIMARY KEY AUTOINCREMENT,
+            name TEXT NOT NULL,
+            provider TEXT NOT NULL,
+            api_url TEXT NOT NULL,
+            api_key TEXT NOT NULL,
+            model TEXT NOT NULL,
+            max_tokens INTEGER DEFAULT 2048,
+            temperature REAL DEFAULT 0.7,
+            is_default INTEGER DEFAULT 0,
+            is_active INTEGER DEFAULT 1,
+            created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+            updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+        )
+    ''')
+    
+    # 智能体配置表
+    cursor.execute('''
+        CREATE TABLE IF NOT EXISTS agents (
+            id INTEGER PRIMARY KEY AUTOINCREMENT,
+            agent_id TEXT NOT NULL UNIQUE,
+            name TEXT NOT NULL,
+            avatar TEXT DEFAULT '🤖',
+            category TEXT NOT NULL,
+            description TEXT,
+            system_prompt TEXT NOT NULL,
+            llm_config_id INTEGER,
+            temperature REAL DEFAULT 0.7,
+            max_tokens INTEGER DEFAULT 2048,
+            enable_search INTEGER DEFAULT 0,
+            tags TEXT,
+            heat INTEGER DEFAULT 0,
+            is_active INTEGER DEFAULT 1,
+            created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+            updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+            FOREIGN KEY (llm_config_id) REFERENCES llm_configs(id)
+        )
+    ''')
+    
+    # 搜索配置表（改为工具配置）
+    cursor.execute('''
+        CREATE TABLE IF NOT EXISTS tool_configs (
+            id INTEGER PRIMARY KEY AUTOINCREMENT,
+            tool_id TEXT NOT NULL UNIQUE,
+            name TEXT NOT NULL,
+            type TEXT NOT NULL,
+            provider TEXT NOT NULL,
+            api_url TEXT NOT NULL,
+            api_key TEXT,
+            config_json TEXT,
+            max_results INTEGER DEFAULT 10,
+            is_default INTEGER DEFAULT 0,
+            is_active INTEGER DEFAULT 1,
+            created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+            updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+        )
+    ''')
+    
+    # 对话配置表
+    cursor.execute('''
+        CREATE TABLE IF NOT EXISTS chat_configs (
+            id INTEGER PRIMARY KEY AUTOINCREMENT,
+            config_id TEXT NOT NULL UNIQUE,
+            name TEXT NOT NULL,
+            llm_config_id INTEGER,
+            enable_search INTEGER DEFAULT 1,
+            enable_tools TEXT,
+            max_history INTEGER DEFAULT 20,
+            temperature REAL DEFAULT 0.7,
+            system_prompt TEXT,
+            is_default INTEGER DEFAULT 1,
+            created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+            updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+            FOREIGN KEY (llm_config_id) REFERENCES llm_configs(id)
+        )
+    ''')
+    
+    # 系统配置表
+    cursor.execute('''
+        CREATE TABLE IF NOT EXISTS system_configs (
+            key TEXT PRIMARY KEY,
+            value TEXT,
+            description TEXT,
+            updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+        )
+    ''')
+    
+    # 统计日志表
+    cursor.execute('''
+        CREATE TABLE IF NOT EXISTS stats_logs (
+            id INTEGER PRIMARY KEY AUTOINCREMENT,
+            log_type TEXT NOT NULL,
+            log_key TEXT NOT NULL,
+            log_value INTEGER DEFAULT 1,
+            created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+        )
+    ''')
+    
+    # 用户表（后台管理）
+    cursor.execute('''
+        CREATE TABLE IF NOT EXISTS admin_users (
+            id INTEGER PRIMARY KEY AUTOINCREMENT,
+            username TEXT NOT NULL UNIQUE,
+            password_hash TEXT NOT NULL,
+            role TEXT DEFAULT 'admin',
+            created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+        )
+    ''')
+    
+    # 初始化默认大模型配置
+    cursor.execute('SELECT COUNT(*) FROM llm_configs')
+    if cursor.fetchone()[0] == 0:
+        cursor.execute('''
+            INSERT INTO llm_configs (name, provider, api_url, api_key, model, is_default)
+            VALUES ('智谱GLM', 'zhipu', 'https://open.bigmodel.cn/api/paas/v4/chat/completions', 
+                    '2259e33a1357460abe17919aaf81e73d.K44a8LPQTmFM5PKm', 'glm-4.5-air', 1)
+        ''')
+    
+    # 初始化默认工具配置（搜索工具）
+    cursor.execute('SELECT COUNT(*) FROM tool_configs')
+    if cursor.fetchone()[0] == 0:
+        cursor.execute('''
+            INSERT INTO tool_configs (tool_id, name, type, provider, api_url, api_key, max_results, is_default)
+            VALUES ('search', '联网搜索', 'search', 'tavily', 'https://api.tavily.com/search', 
+                    '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', 10, 1)
+        ''')
+    
+    # 初始化默认对话配置
+    cursor.execute('SELECT COUNT(*) FROM chat_configs')
+    if cursor.fetchone()[0] == 0:
+        cursor.execute('''
+            INSERT INTO chat_configs (config_id, name, llm_config_id, enable_tools, is_default)
+            VALUES ('default', '默认对话配置', 1, 'search', 1)
+        ''')
+    
+    # 初始化默认智能体
+    cursor.execute('SELECT COUNT(*) FROM agents')
+    if cursor.fetchone()[0] == 0:
+        default_agents = [
+            ('assistant', '通用助手', '🤖', 'hot', '能回答各类问题，帮助写作、分析、解答疑惑', '你是一个智能助手，能够回答各类问题，帮助用户解决问题。', 9500),
+            ('writer', '写作助手', '✍️', 'hot', '专注于文章写作、文案创作、内容润色', '你是一个专业的写作助手，擅长各类文章写作、文案创作和内容润色。', 8800),
+            ('coder', '编程助手', '👨‍💻', 'hot', '精通编程语言，解答技术问题，生成代码', '你是一个专业的编程助手，精通各类编程语言，能够解答技术问题并生成高质量代码。', 8500),
+            ('translator', '翻译助手', '🌐', 'hot', '多语言翻译，精准表达，文化适配', '你是一个专业的翻译助手，精通多语言翻译，能够精准表达并适配文化差异。', 7200),
+            ('work', '工作助手', '💼', 'work', '职场问题解答，工作效率提升', '你是一个工作助手，帮助解决职场问题，提升工作效率。', 5000),
+            ('ppt', 'PPT助手', '📊', 'work', 'PPT内容生成，结构优化，设计建议', '你是一个PPT助手，擅长PPT内容生成、结构优化和设计建议。', 4500),
+            ('excel', 'Excel助手', '📈', 'work', 'Excel公式、数据分析、表格优化', '你是一个Excel助手，精通Excel公式、数据分析和表格优化。', 4000),
+            ('teacher', '学习助手', '📚', 'study', '知识讲解，学习方法，考试辅导', '你是一个学习助手，擅长知识讲解、学习方法指导和考试辅导。', 5500),
+            ('english', '英语助手', '🔤', 'study', '英语学习，语法纠正，口语练习', '你是一个英语助手，帮助英语学习、语法纠正和口语练习。', 5000),
+            ('math', '数学助手', '🔢', 'study', '数学解题，公式推导，概念讲解', '你是一个数学助手，擅长数学解题、公式推导和概念讲解。', 4500),
+            ('health', '健康助手', '🏥', 'life', '健康咨询，养生建议，运动指导', '你是一个健康助手，提供健康咨询、养生建议和运动指导。', 3500),
+            ('travel', '旅行助手', '✈️', 'life', '旅行规划，景点推荐，美食指南', '你是一个旅行助手，擅长旅行规划、景点推荐和美食指南。', 3200),
+            ('food', '美食助手', '🍳', 'life', '菜谱推荐，烹饪技巧，营养搭配', '你是一个美食助手，提供菜谱推荐、烹饪技巧和营养搭配建议。', 3000),
+        ]
+        for agent in default_agents:
+            cursor.execute('''
+                INSERT INTO agents (agent_id, name, avatar, category, description, system_prompt, heat)
+                VALUES (?, ?, ?, ?, ?, ?, ?)
+            ''', agent)
+    
+    # 初始化系统配置
+    cursor.execute('SELECT COUNT(*) FROM system_configs')
+    if cursor.fetchone()[0] == 0:
+        default_configs = [
+            ('app_name', 'AI助手', '应用名称'),
+            ('app_version', '3.5.1', '应用版本'),
+            ('llm_provider', 'zhipu', '默认大模型提供商'),
+            ('enable_search', 'true', '是否启用联网搜索'),
+            ('guest_chat_sessions', '1', '游客每日对话会话限制'),
+            ('guest_chat_messages', '20', '游客每日对话消息限制'),
+            ('guest_agent_messages', '20', '游客每日智能体消息限制'),
+            ('admin_password', 'admin123', '管理员密码'),
+        ]
+        for key, value, desc in default_configs:
+            cursor.execute('INSERT INTO system_configs (key, value, description) VALUES (?, ?, ?)', (key, value, desc))
+    
+    # 初始化管理员账户
+    cursor.execute('SELECT COUNT(*) FROM admin_users')
+    if cursor.fetchone()[0] == 0:
+        cursor.execute('INSERT INTO admin_users (username, password_hash) VALUES (?, ?)', 
+                       (ADMIN_USERNAME, ADMIN_PASSWORD_HASH))
+    
+    conn.commit()
+    conn.close()
+
+
+# ==================== 前端静态文件服务 ====================
+
+@app.route('/')
+def index():
+    """前端首页"""
+    return send_from_directory(app.static_folder, 'index.html')
+
+
+@app.route('/admin')
+def admin():
+    """后台管理页面"""
+    return send_from_directory(app.static_folder, 'admin.html')
+
+
+@app.route('/admin/<path:path>')
+def admin_static(path):
+    """后台管理静态文件"""
+    return send_from_directory(app.static_folder, path)
+
+
+@app.route('/<path:path>')
+def static_files(path):
+    """前端静态文件"""
+    return send_from_directory(app.static_folder, path)
+
+
+# ==================== 后台管理 API ====================
+
+# 管理员登录验证
+def check_admin_auth():
+    """检查管理员权限"""
+    auth = request.authorization
+    if not auth:
+        return False
+    password_hash = hashlib.sha256(auth.password.encode()).hexdigest()
+    conn = get_db()
+    cursor = conn.cursor()
+    cursor.execute('SELECT * FROM admin_users WHERE username = ? AND password_hash = ?', 
+                   (auth.username, password_hash))
+    user = cursor.fetchone()
+    conn.close()
+    return user is not None
+
+
+@app.route('/api/admin/login', methods=['POST'])
+def admin_login():
+    """管理员登录"""
+    data = request.json
+    username = data.get('username')
+    password = data.get('password')
+    
+    if not username or not password:
+        return jsonify({'error': '请输入用户名和密码'}), 400
+    
+    password_hash = hashlib.sha256(password.encode()).hexdigest()
+    conn = get_db()
+    cursor = conn.cursor()
+    cursor.execute('SELECT * FROM admin_users WHERE username = ? AND password_hash = ?', 
+                   (username, password_hash))
+    user = cursor.fetchone()
+    conn.close()
+    
+    if user:
+        return jsonify({'success': True, 'message': '登录成功'})
+    else:
+        return jsonify({'error': '用户名或密码错误'}), 401
+
+
+# ==================== 大模型接口管理 ====================
+
+@app.route('/api/admin/llm', methods=['GET'])
+def get_llm_configs():
+    """获取所有大模型配置"""
+    conn = get_db()
+    cursor = conn.cursor()
+    cursor.execute('SELECT * FROM llm_configs ORDER BY is_default DESC, created_at DESC')
+    configs = [dict(row) for row in cursor.fetchall()]
+    conn.close()
+    return jsonify(configs)
+
+
+@app.route('/api/admin/llm', methods=['POST'])
+def add_llm_config():
+    """添加大模型配置"""
+    data = request.json
+    conn = get_db()
+    cursor = conn.cursor()
+    cursor.execute('''
+        INSERT INTO llm_configs (name, provider, api_url, api_key, model, max_tokens, temperature)
+        VALUES (?, ?, ?, ?, ?, ?, ?)
+    ''', (data['name'], data['provider'], data['api_url'], data['api_key'], 
+          data['model'], data.get('max_tokens', 2048), data.get('temperature', 0.7)))
+    conn.commit()
+    config_id = cursor.lastrowid
+    conn.close()
+    return jsonify({'success': True, 'id': config_id})
+
+
+@app.route('/api/admin/llm/<int:id>', methods=['PUT'])
+def update_llm_config(id):
+    """更新大模型配置"""
+    data = request.json
+    conn = get_db()
+    cursor = conn.cursor()
+    cursor.execute('''
+        UPDATE llm_configs SET name=?, provider=?, api_url=?, api_key=?, model=?, 
+        max_tokens=?, temperature=?, updated_at=CURRENT_TIMESTAMP WHERE id=?
+    ''', (data['name'], data['provider'], data['api_url'], data['api_key'], 
+          data['model'], data.get('max_tokens', 2048), data.get('temperature', 0.7), id))
+    conn.commit()
+    conn.close()
+    return jsonify({'success': True})
+
+
+@app.route('/api/admin/llm/<int:id>', methods=['DELETE'])
+def delete_llm_config(id):
+    """删除大模型配置"""
+    conn = get_db()
+    cursor = conn.cursor()
+    cursor.execute('DELETE FROM llm_configs WHERE id=?', (id,))
+    conn.commit()
+    conn.close()
+    return jsonify({'success': True})
+
+
+@app.route('/api/admin/llm/<int:id>/default', methods=['POST'])
+def set_default_llm(id):
+    """设置默认大模型"""
+    conn = get_db()
+    cursor = conn.cursor()
+    cursor.execute('UPDATE llm_configs SET is_default=0')
+    cursor.execute('UPDATE llm_configs SET is_default=1 WHERE id=?', (id,))
+    conn.commit()
+    conn.close()
+    return jsonify({'success': True})
+
+
+# ==================== 智能体管理 ====================
+
+@app.route('/api/admin/agents', methods=['GET'])
+def get_agents():
+    """获取所有智能体"""
+    conn = get_db()
+    cursor = conn.cursor()
+    cursor.execute('SELECT * FROM agents ORDER BY category, heat DESC')
+    agents = [dict(row) for row in cursor.fetchall()]
+    conn.close()
+    return jsonify(agents)
+
+
+@app.route('/api/admin/agents', methods=['POST'])
+def add_agent():
+    """添加智能体"""
+    data = request.json
+    conn = get_db()
+    cursor = conn.cursor()
+    cursor.execute('''
+        INSERT INTO agents (agent_id, name, avatar, category, description, system_prompt, 
+        llm_config_id, temperature, max_tokens, enable_search, tags, heat)
+        VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
+    ''', (data['agent_id'], data['name'], data.get('avatar', '🤖'), data['category'], 
+          data.get('description', ''), data['system_prompt'], data.get('llm_config_id'),
+          data.get('temperature', 0.7), data.get('max_tokens', 2048), 
+          data.get('enable_search', 0), data.get('tags', ''), data.get('heat', 0)))
+    conn.commit()
+    conn.close()
+    return jsonify({'success': True})
+
+
+@app.route('/api/admin/agents/<agent_id>', methods=['PUT'])
+def update_agent(agent_id):
+    """更新智能体"""
+    data = request.json
+    conn = get_db()
+    cursor = conn.cursor()
+    cursor.execute('''
+        UPDATE agents SET name=?, avatar=?, category=?, description=?, system_prompt=?, 
+        llm_config_id=?, temperature=?, max_tokens=?, enable_search=?, tags=?, heat=?, 
+        updated_at=CURRENT_TIMESTAMP WHERE agent_id=?
+    ''', (data['name'], data.get('avatar', '🤖'), data['category'], 
+          data.get('description', ''), data['system_prompt'], data.get('llm_config_id'),
+          data.get('temperature', 0.7), data.get('max_tokens', 2048), 
+          data.get('enable_search', 0), data.get('tags', ''), data.get('heat', 0), agent_id))
+    conn.commit()
+    conn.close()
+    return jsonify({'success': True})
+
+
+@app.route('/api/admin/agents/<agent_id>', methods=['DELETE'])
+def delete_agent(agent_id):
+    """删除智能体"""
+    conn = get_db()
+    cursor = conn.cursor()
+    cursor.execute('DELETE FROM agents WHERE agent_id=?', (agent_id,))
+    conn.commit()
+    conn.close()
+    return jsonify({'success': True})
+
+
+# ==================== 对话配置管理 ====================
+
+@app.route('/api/admin/chat', methods=['GET'])
+def get_chat_config():
+    """获取对话配置（只有一个默认配置）"""
+    conn = get_db()
+    cursor = conn.cursor()
+    cursor.execute('SELECT * FROM chat_configs WHERE is_default=1 LIMIT 1')
+    config = cursor.fetchone()
+    
+    if not config:
+        # 如果没有配置，创建默认配置
+        cursor.execute('''
+            INSERT INTO chat_configs (config_id, name, llm_config_id, enable_search, enable_tools, max_history, temperature, is_default)
+            VALUES ('default', '默认配置', 1, 1, 'search', 20, 0.7, 1)
+        ''')
+        conn.commit()
+        cursor.execute('SELECT * FROM chat_configs WHERE is_default=1 LIMIT 1')
+        config = cursor.fetchone()
+    
+    conn.close()
+    return jsonify(dict(config) if config else {})
+
+
+@app.route('/api/admin/chat', methods=['PUT'])
+def update_chat_config():
+    """更新对话配置"""
+    data = request.json
+    conn = get_db()
+    cursor = conn.cursor()
+    cursor.execute('''
+        UPDATE chat_configs SET 
+        llm_config_id=?, enable_search=?, enable_tools=?, max_history=?, 
+        temperature=?, system_prompt=?, updated_at=CURRENT_TIMESTAMP 
+        WHERE is_default=1
+    ''', (data.get('llm_config_id', 1), data.get('enable_search', 1),
+          data.get('enable_tools', 'search'), data.get('max_history', 20),
+          data.get('temperature', 0.7), data.get('system_prompt', '')))
+    conn.commit()
+    conn.close()
+    return jsonify({'success': True})
+
+
+# ==================== 工具配置管理 ====================
+
+@app.route('/api/admin/tools', methods=['GET'])
+def get_tool_configs():
+    """获取工具配置"""
+    conn = get_db()
+    cursor = conn.cursor()
+    cursor.execute('SELECT * FROM tool_configs ORDER BY is_default DESC, type')
+    tools = [dict(row) for row in cursor.fetchall()]
+    conn.close()
+    return jsonify(tools)
+
+
+@app.route('/api/admin/tools', methods=['POST'])
+def add_tool_config():
+    """添加工具配置"""
+    data = request.json
+    conn = get_db()
+    cursor = conn.cursor()
+    cursor.execute('''
+        INSERT INTO tool_configs (tool_id, name, type, provider, api_url, api_key, config_json, max_results)
+        VALUES (?, ?, ?, ?, ?, ?, ?, ?)
+    ''', (data['tool_id'], data['name'], data['type'], data['provider'], 
+          data['api_url'], data.get('api_key', ''), data.get('config_json', ''),
+          data.get('max_results', 10)))
+    conn.commit()
+    conn.close()
+    return jsonify({'success': True})
+
+
+@app.route('/api/admin/tools/<tool_id>', methods=['PUT'])
+def update_tool_config(tool_id):
+    """更新工具配置"""
+    data = request.json
+    conn = get_db()
+    cursor = conn.cursor()
+    cursor.execute('''
+        UPDATE tool_configs SET name=?, type=?, provider=?, api_url=?, api_key=?, 
+        config_json=?, max_results=?, updated_at=CURRENT_TIMESTAMP WHERE tool_id=?
+    ''', (data['name'], data['type'], data['provider'], data['api_url'], 
+          data.get('api_key', ''), data.get('config_json', ''),
+          data.get('max_results', 10), tool_id))
+    conn.commit()
+    conn.close()
+    return jsonify({'success': True})
+
+
+@app.route('/api/admin/tools/<tool_id>', methods=['DELETE'])
+def delete_tool_config(tool_id):
+    """删除工具配置"""
+    conn = get_db()
+    cursor = conn.cursor()
+    cursor.execute('DELETE FROM tool_configs WHERE tool_id=?', (tool_id,))
+    conn.commit()
+    conn.close()
+    return jsonify({'success': True})
+
+
+@app.route('/api/admin/tools/<tool_id>/default', methods=['POST'])
+def set_default_tool(tool_id):
+    """设置默认工具"""
+    conn = get_db()
+    cursor = conn.cursor()
+    cursor.execute('UPDATE tool_configs SET is_default=0 WHERE type=(SELECT type FROM tool_configs WHERE tool_id=?)', (tool_id,))
+    cursor.execute('UPDATE tool_configs SET is_default=1 WHERE tool_id=?', (tool_id,))
+    conn.commit()
+    conn.close()
+    return jsonify({'success': True})
+
+
+# ==================== 系统配置管理 ====================
+
+@app.route('/api/admin/system', methods=['GET'])
+def get_system_configs():
+    """获取系统配置"""
+    conn = get_db()
+    cursor = conn.cursor()
+    cursor.execute('SELECT * FROM system_configs')
+    configs = {row['key']: {'value': row['value'], 'description': row['description']} 
+               for row in cursor.fetchall()}
+    conn.close()
+    return jsonify(configs)
+
+
+@app.route('/api/admin/system', methods=['POST'])
+def update_system_config():
+    """更新系统配置"""
+    data = request.json
+    conn = get_db()
+    cursor = conn.cursor()
+    for key, value in data.items():
+        cursor.execute('''
+            UPDATE system_configs SET value=?, updated_at=CURRENT_TIMESTAMP WHERE key=?
+        ''', (value, key))
+    conn.commit()
+    conn.close()
+    return jsonify({'success': True})
+
+
+# ==================== 统计信息 ====================
+
+@app.route('/api/admin/stats', methods=['GET'])
+def get_stats():
+    """获取统计信息"""
+    conn = get_db()
+    cursor = conn.cursor()
+    
+    # 今日统计
+    today = datetime.now().strftime('%Y-%m-%d')
+    
+    # 各类型统计
+    stats = {}
+    
+    # LLM调用统计
+    cursor.execute('SELECT SUM(log_value) FROM stats_logs WHERE log_type="llm_call"')
+    stats['llm_total_calls'] = cursor.fetchone()[0] or 0
+    
+    cursor.execute('SELECT SUM(log_value) FROM stats_logs WHERE log_type="llm_call" AND created_at >= ?', (today,))
+    stats['llm_today_calls'] = cursor.fetchone()[0] or 0
+    
+    # 搜索统计
+    cursor.execute('SELECT SUM(log_value) FROM stats_logs WHERE log_type="search_call"')
+    stats['search_total_calls'] = cursor.fetchone()[0] or 0
+    
+    cursor.execute('SELECT SUM(log_value) FROM stats_logs WHERE log_type="search_call" AND created_at >= ?', (today,))
+    stats['search_today_calls'] = cursor.fetchone()[0] or 0
+    
+    # 智能体使用统计
+    cursor.execute('''
+        SELECT log_key, SUM(log_value) as count FROM stats_logs 
+        WHERE log_type="agent_use" GROUP BY log_key ORDER BY count DESC LIMIT 10
+    ''')
+    stats['agent_usage'] = [dict(row) for row in cursor.fetchall()]
+    
+    # 用户统计
+    cursor.execute('SELECT COUNT(*) FROM stats_logs WHERE log_type="user_register"')
+    stats['total_users'] = cursor.fetchone()[0] or 0
+    
+    # 智能体数量
+    cursor.execute('SELECT COUNT(*) FROM agents WHERE is_active=1')
+    stats['agent_count'] = cursor.fetchone()[0]
+    
+    # LLM配置数量
+    cursor.execute('SELECT COUNT(*) FROM llm_configs WHERE is_active=1')
+    stats['llm_count'] = cursor.fetchone()[0]
+    
+    conn.close()
+    return jsonify(stats)
+
+
+@app.route('/api/admin/stats/log', methods=['POST'])
+def log_stats():
+    """记录统计日志"""
+    data = request.json
+    conn = get_db()
+    cursor = conn.cursor()
+    cursor.execute('INSERT INTO stats_logs (log_type, log_key, log_value) VALUES (?, ?, ?)',
+                   (data['type'], data.get('key', ''), data.get('value', 1)))
+    conn.commit()
+    conn.close()
+    return jsonify({'success': True})
+
+
+# ==================== 前端配置获取 ====================
+
+@app.route('/api/config', methods=['GET'])
+def get_frontend_config():
+    """获取前端使用的配置"""
+    conn = get_db()
+    cursor = conn.cursor()
+    
+    # 获取默认LLM配置
+    cursor.execute('SELECT * FROM llm_configs WHERE is_default=1 AND is_active=1 LIMIT 1')
+    llm = cursor.fetchone()
+    
+    # 获取默认工具配置（搜索等）
+    cursor.execute('SELECT * FROM tool_configs WHERE is_default=1 AND is_active=1')
+    tools = [dict(row) for row in cursor.fetchall()]
+    
+    # 获取所有智能体
+    cursor.execute('SELECT agent_id, name, avatar, category, description, system_prompt, heat, enable_search FROM agents WHERE is_active=1')
+    agents = [dict(row) for row in cursor.fetchall()]
+    
+    # 获取默认对话配置
+    cursor.execute('SELECT * FROM chat_configs WHERE is_default=1 LIMIT 1')
+    chat_config = cursor.fetchone()
+    
+    # 获取系统配置
+    cursor.execute('SELECT key, value FROM system_configs')
+    system = {row['key']: row['value'] for row in cursor.fetchall()}
+    
+    conn.close()
+    
+    config = {
+        'llm': dict(llm) if llm else None,
+        'tools': tools,
+        'agents': agents,
+        'chat_config': dict(chat_config) if chat_config else None,
+        'system': {
+            'appName': system.get('app_name', 'AI助手'),
+            'version': system.get('app_version', '3.6.0'),
+            'enableSearch': system.get('enable_search', 'true') == 'true',
+            'guestLimits': {
+                'chatSessions': int(system.get('guest_chat_sessions', '1')),
+                'chatMessages': int(system.get('guest_chat_messages', '20')),
+                'agentMessages': int(system.get('guest_agent_messages', '20')),
+            }
+        }
+    }
+    
+    return jsonify(config)
+
+
+# ==================== 启动 ====================
+
+if __name__ == '__main__':
+    # 初始化数据库
+    init_db()
+    
+    # 启动服务
+    print('🚀 AI Chat App Backend started on http://localhost:19021')
+    print('📊 Admin Panel: http://localhost:19021/admin')
+    print('👤 Default admin: admin / admin123')
+    
+    app.run(host='0.0.0.0', port=19021, debug=True)

backend/requirements.txt

@@ -0,0 +1,2 @@
+flask>=2.0.0
+flask-cors>=3.0.0

backend/start.sh

@@ -0,0 +1,4 @@
+#!/bin/bash
+cd "$(dirname "$0")"
+pip install -r requirements.txt -q
+python app.py

www/admin.html

@@ -0,0 +1,475 @@
+<!DOCTYPE html>
+<html lang="zh-CN">
+<head>
+  <meta charset="UTF-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1.0">
+  <title>AI助手 - 后台管理</title>
+  <style>
+    :root {
+      --primary: #667eea;
+      --primary-dark: #5a67d8;
+      --bg-color: #f5f7fa;
+      --card-bg: #ffffff;
+      --text-color: #2d3748;
+      --text-light: #718096;
+      --border-color: #e2e8f0;
+      --danger: #e53e3e;
+      --success: #22c55e;
+      --warning: #f59e0b;
+    }
+    
+    * {
+      margin: 0;
+      padding: 0;
+      box-sizing: border-box;
+    }
+    
+    body {
+      font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
+      background: var(--bg-color);
+      color: var(--text-color);
+      line-height: 1.6;
+    }
+    
+    /* 登录页面 */
+    .login-page {
+      display: flex;
+      align-items: center;
+      justify-content: center;
+      height: 100vh;
+      background: linear-gradient(135deg, var(--primary) 0%, #764ba2 100%);
+    }
+    
+    .login-card {
+      background: white;
+      padding: 40px;
+      border-radius: 16px;
+      width: 350px;
+      text-align: center;
+    }
+    
+    .login-logo {
+      font-size: 48px;
+      margin-bottom: 16px;
+    }
+    
+    .login-title {
+      font-size: 24px;
+      font-weight: 600;
+      margin-bottom: 24px;
+    }
+    
+    .login-input {
+      width: 100%;
+      padding: 12px 16px;
+      border: 2px solid var(--border-color);
+      border-radius: 10px;
+      font-size: 16px;
+      margin-bottom: 16px;
+      outline: none;
+    }
+    
+    .login-input:focus {
+      border-color: var(--primary);
+    }
+    
+    .login-btn {
+      width: 100%;
+      padding: 14px;
+      background: linear-gradient(135deg, var(--primary) 0%, #764ba2 100%);
+      color: white;
+      border: none;
+      border-radius: 10px;
+      font-size: 16px;
+      font-weight: 500;
+      cursor: pointer;
+      margin-top: 8px;
+    }
+    
+    .login-btn:hover {
+      opacity: 0.9;
+    }
+    
+    /* 主页面 */
+    .admin-page {
+      display: none;
+    }
+    
+    .admin-header {
+      display: flex;
+      justify-content: space-between;
+      align-items: center;
+      padding: 16px 24px;
+      background: white;
+      border-bottom: 1px solid var(--border-color);
+    }
+    
+    .admin-logo {
+      display: flex;
+      align-items: center;
+      gap: 8px;
+      font-size: 20px;
+      font-weight: 600;
+    }
+    
+    .admin-logo span {
+      font-size: 28px;
+    }
+    
+    .admin-header-right {
+      display: flex;
+      align-items: center;
+      gap: 16px;
+    }
+    
+    .admin-logout {
+      padding: 8px 16px;
+      background: var(--danger);
+      color: white;
+      border: none;
+      border-radius: 6px;
+      cursor: pointer;
+    }
+    
+    /* 侧边栏 */
+    .admin-container {
+      display: flex;
+      height: calc(100vh - 60px);
+    }
+    
+    .admin-sidebar {
+      width: 220px;
+      background: white;
+      border-right: 1px solid var(--border-color);
+      padding: 16px;
+    }
+    
+    .sidebar-item {
+      display: flex;
+      align-items: center;
+      gap: 12px;
+      padding: 12px 16px;
+      border-radius: 8px;
+      cursor: pointer;
+      transition: all 0.2s;
+      margin-bottom: 4px;
+    }
+    
+    .sidebar-item:hover {
+      background: rgba(102, 126, 234, 0.1);
+    }
+    
+    .sidebar-item.active {
+      background: linear-gradient(135deg, var(--primary) 0%, #764ba2 100%);
+      color: white;
+    }
+    
+    .sidebar-icon {
+      font-size: 20px;
+    }
+    
+    /* 内容区 */
+    .admin-content {
+      flex: 1;
+      padding: 24px;
+      overflow-y: auto;
+    }
+    
+    .content-header {
+      display: flex;
+      justify-content: space-between;
+      align-items: center;
+      margin-bottom: 24px;
+    }
+    
+    .content-title {
+      font-size: 24px;
+      font-weight: 600;
+    }
+    
+    .add-btn {
+      padding: 10px 20px;
+      background: var(--primary);
+      color: white;
+      border: none;
+      border-radius: 8px;
+      cursor: pointer;
+    }
+    
+    /* 数据卡片 */
+    .stats-grid {
+      display: grid;
+      grid-template-columns: repeat(4, 1fr);
+      gap: 16px;
+      margin-bottom: 24px;
+    }
+    
+    .stat-card {
+      background: white;
+      padding: 20px;
+      border-radius: 12px;
+      text-align: center;
+    }
+    
+    .stat-icon {
+      font-size: 32px;
+      margin-bottom: 8px;
+    }
+    
+    .stat-value {
+      font-size: 28px;
+      font-weight: 600;
+      color: var(--primary);
+    }
+    
+    .stat-label {
+      font-size: 14px;
+      color: var(--text-light);
+    }
+    
+    /* 数据表格 */
+    .data-table {
+      background: white;
+      border-radius: 12px;
+      overflow: hidden;
+    }
+    
+    .data-table table {
+      width: 100%;
+      border-collapse: collapse;
+    }
+    
+    .data-table th, .data-table td {
+      padding: 14px 16px;
+      text-align: left;
+      border-bottom: 1px solid var(--border-color);
+    }
+    
+    .data-table th {
+      background: var(--bg-color);
+      font-weight: 600;
+      color: var(--text-light);
+    }
+    
+    .data-table tr:last-child td {
+      border-bottom: none;
+    }
+    
+    .data-table tr:hover td {
+      background: rgba(102, 126, 234, 0.05);
+    }
+    
+    /* 操作按钮 */
+    .action-btns {
+      display: flex;
+      gap: 8px;
+    }
+    
+    .action-btn {
+      padding: 6px 12px;
+      border: none;
+      border-radius: 6px;
+      cursor: pointer;
+      font-size: 12px;
+    }
+    
+    .action-btn.edit {
+      background: var(--primary);
+      color: white;
+    }
+    
+    .action-btn.delete {
+      background: var(--danger);
+      color: white;
+    }
+    
+    .action-btn.default {
+      background: var(--success);
+      color: white;
+    }
+    
+    /* 默认标记 */
+    .default-badge {
+      padding: 4px 8px;
+      background: var(--success);
+      color: white;
+      border-radius: 4px;
+      font-size: 12px;
+    }
+    
+    /* 模态框 */
+    .modal {
+      position: fixed;
+      inset: 0;
+      background: rgba(0,0,0,0.5);
+      display: none;
+      align-items: center;
+      justify-content: center;
+      z-index: 1000;
+    }
+    
+    .modal.show {
+      display: flex;
+    }
+    
+    .modal-content {
+      background: white;
+      padding: 24px;
+      border-radius: 16px;
+      max-width: 500px;
+      width: 90%;
+    }
+    
+    .modal-header {
+      display: flex;
+      justify-content: space-between;
+      align-items: center;
+      margin-bottom: 24px;
+    }
+    
+    .modal-title {
+      font-size: 20px;
+      font-weight: 600;
+    }
+    
+    .modal-close {
+      font-size: 24px;
+      cursor: pointer;
+      color: var(--text-light);
+    }
+    
+    .form-group {
+      margin-bottom: 16px;
+    }
+    
+    .form-label {
+      display: block;
+      font-size: 14px;
+      font-weight: 500;
+      margin-bottom: 8px;
+    }
+    
+    .form-input, .form-select, .form-textarea {
+      width: 100%;
+      padding: 12px;
+      border: 1px solid var(--border-color);
+      border-radius: 8px;
+      font-size: 14px;
+      outline: none;
+    }
+    
+    .form-input:focus, .form-select:focus, .form-textarea:focus {
+      border-color: var(--primary);
+    }
+    
+    .form-textarea {
+      resize: vertical;
+      min-height: 100px;
+    }
+    
+    .form-submit {
+      width: 100%;
+      padding: 14px;
+      background: var(--primary);
+      color: white;
+      border: none;
+      border-radius: 8px;
+      font-size: 16px;
+      cursor: pointer;
+      margin-top: 16px;
+    }
+    
+    /* Toast */
+    .toast {
+      position: fixed;
+      top: 80px;
+      left: 50%;
+      transform: translateX(-50%);
+      background: var(--text-color);
+      color: white;
+      padding: 12px 24px;
+      border-radius: 8px;
+      font-size: 14px;
+      opacity: 0;
+      transition: opacity 0.3s;
+      z-index: 2000;
+    }
+    
+    .toast.show {
+      opacity: 1;
+    }
+  </style>
+</head>
+<body>
+  <!-- 登录页面 -->
+  <div class="login-page" id="loginPage">
+    <div class="login-card">
+      <div class="login-logo">🤖</div>
+      <h1 class="login-title">后台管理系统</h1>
+      <input type="text" class="login-input" id="loginUsername" placeholder="用户名">
+      <input type="password" class="login-input" id="loginPassword" placeholder="密码">
+      <button class="login-btn" id="loginBtn">登录</button>
+      <p style="margin-top: 16px; color: #999; font-size: 12px;">默认: admin / admin123</p>
+    </div>
+  </div>
+  
+  <!-- 管理页面 -->
+  <div class="admin-page" id="adminPage">
+    <header class="admin-header">
+      <div class="admin-logo">
+        <span>🤖</span>
+        AI助手 - 后台管理
+      </div>
+      <div class="admin-header-right">
+        <span id="adminName">管理员</span>
+        <button class="admin-logout" id="logoutBtn">退出</button>
+      </div>
+    </header>
+    
+    <div class="admin-container">
+      <aside class="admin-sidebar">
+        <div class="sidebar-item active" data-page="stats">
+          <span class="sidebar-icon">📊</span>
+          <span>统计信息</span>
+        </div>
+        <div class="sidebar-item" data-page="llm">
+          <span class="sidebar-icon">🧠</span>
+          <span>大模型配置</span>
+        </div>
+        <div class="sidebar-item" data-page="agents">
+          <span class="sidebar-icon">🤖</span>
+          <span>智能体管理</span>
+        </div>
+        <div class="sidebar-item" data-page="chat">
+          <span class="sidebar-icon">💬</span>
+          <span>对话配置</span>
+        </div>
+        <div class="sidebar-item" data-page="tools">
+          <span class="sidebar-icon">🔧</span>
+          <span>工具配置</span>
+        </div>
+        <div class="sidebar-item" data-page="system">
+          <span class="sidebar-icon">⚙️</span>
+          <span>系统设置</span>
+        </div>
+      </aside>
+      
+      <main class="admin-content" id="mainContent">
+        <!-- 内容区动态加载 -->
+      </main>
+    </div>
+  </div>
+  
+  <!-- Toast -->
+  <div class="toast" id="toast"></div>
+  
+  <!-- 模态框 -->
+  <div class="modal" id="modal">
+    <div class="modal-content" id="modalContent">
+      <!-- 动态内容 -->
+    </div>
+  </div>
+  
+  <script src="admin.js?v=1.0.0"></script>
+</body>
+</html>

www/index.html

@@ -8,12 +8,12 @@
   <meta http-equiv="Pragma" content="no-cache">
   <meta http-equiv="Expires" content="0">
   <title>AI助手</title>
-  <link rel="stylesheet" href="style.css?v=2.7.5">
+  <link rel="stylesheet" href="style.css?v=3.5.1">
   <link rel="manifest" href="manifest.json">
 </head>
 <body>
   <div id="app"></div>
-  <script src="marked.min.js?v=2.7.5"></script>
-  <script src="app.js?v=2.7.5"></script>
+  <script src="marked.min.js?v=3.5.1"></script>
+  <script src="app.js?v=3.5.1"></script>
 </body>
 </html>