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

backend/app.py

@@ -102,11 +102,12 @@ def init_db():
             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 0,
+            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)
@@ -423,67 +424,41 @@ def delete_agent(agent_id):
 # ==================== 对话配置管理 ====================
 
 @app.route('/api/admin/chat', methods=['GET'])
-def get_chat_configs():
-    """获取对话配置"""
+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 ORDER BY is_default DESC')
-    configs = [dict(row) for row in cursor.fetchall()]
+    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(configs)
+    return jsonify(dict(config) if config else {})
 
 
-@app.route('/api/admin/chat', methods=['POST'])
-def add_chat_config():
-    """添加对话配置"""
-    data = request.json
-    conn = get_db()
-    cursor = conn.cursor()
-    cursor.execute('''
-        INSERT INTO chat_configs (config_id, name, llm_config_id, enable_tools, max_history, temperature, system_prompt)
-        VALUES (?, ?, ?, ?, ?, ?, ?)
-    ''', (data['config_id'], data['name'], data.get('llm_config_id'), data.get('enable_tools', ''),
-          data.get('max_history', 20), data.get('temperature', 0.7), data.get('system_prompt', '')))
-    conn.commit()
-    conn.close()
-    return jsonify({'success': True})
-
-
-@app.route('/api/admin/chat/<config_id>', methods=['PUT'])
-def update_chat_config(config_id):
+@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 name=?, llm_config_id=?, enable_tools=?, max_history=?, 
-        temperature=?, system_prompt=?, updated_at=CURRENT_TIMESTAMP WHERE config_id=?
-    ''', (data['name'], data.get('llm_config_id'), data.get('enable_tools', ''),
-          data.get('max_history', 20), data.get('temperature', 0.7), 
-          data.get('system_prompt', ''), config_id))
-    conn.commit()
-    conn.close()
-    return jsonify({'success': True})
-
-
-@app.route('/api/admin/chat/<config_id>', methods=['DELETE'])
-def delete_chat_config(config_id):
-    """删除对话配置"""
-    conn = get_db()
-    cursor = conn.cursor()
-    cursor.execute('DELETE FROM chat_configs WHERE config_id=?', (config_id,))
-    conn.commit()
-    conn.close()
-    return jsonify({'success': True})
-
-
-@app.route('/api/admin/chat/<config_id>/default', methods=['POST'])
-def set_default_chat(config_id):
-    """设置默认对话配置"""
-    conn = get_db()
-    cursor = conn.cursor()
-    cursor.execute('UPDATE chat_configs SET is_default=0')
-    cursor.execute('UPDATE chat_configs SET is_default=1 WHERE config_id=?', (config_id,))
+        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})

www/admin.js

@@ -586,186 +586,113 @@ async function deleteAgent(agentId) {
 // ==================== 对话配置页面 ====================
 
 async function loadChatConfigPage(content) {
-  chatConfigs = await fetchAPI('/api/admin/chat');
   llmConfigs = await fetchAPI('/api/admin/llm');
   toolConfigs = await fetchAPI('/api/admin/tools');
+  const chatConfig = await fetchAPI('/api/admin/chat');
   
   content.innerHTML = `
     <div class="content-header">
       <h1 class="content-title">对话配置</h1>
-      <button class="add-btn" onclick="showAddChatConfigModal()">+ 添加配置</button>
     </div>
     
-    <div class="data-table">
-      <table>
-        <thead>
-          <tr>
-            <th>配置名称</th>
-            <th>LLM</th>
-            <th>可用工具</th>
-            <th>历史记录数</th>
-            <th>Temperature</th>
-            <th>状态</th>
-            <th>操作</th>
-          </tr>
-        </thead>
-        <tbody>
-          ${chatConfigs.map(c => `
-            <tr>
-              <td>${c.name} ${c.is_default ? '<span class="default-badge">默认</span>' : ''}</td>
-              <td>${llmConfigs.find(l => l.id === c.llm_config_id)?.name || '未指定'}</td>
-              <td>${c.enable_tools || '无'}</td>
-              <td>${c.max_history || 20}</td>
-              <td>${c.temperature || 0.7}</td>
-              <td>${c.is_default ? '✅ 默认' : '-'}</td>
-              <td>
-                <div class="action-btns">
-                  <button class="action-btn edit" onclick="showEditChatConfigModal('${c.config_id}')">编辑</button>
-                  ${!c.is_default ? `<button class="action-btn default" onclick="setDefaultChatConfig('${c.config_id}')">设为默认</button>` : ''}
-                  <button class="action-btn delete" onclick="deleteChatConfig('${c.config_id}')">删除</button>
-                </div>
-              </td>
-            </tr>
-          `).join('')}
-        </tbody>
-      </table>
+    <div style="background: white; padding: 24px; border-radius: 12px;">
+      <p style="color: #718096; margin-bottom: 24px;">
+        此配置对所有用户的普通对话生效，修改后立即生效。
+      </p>
+      
+      <div class="form-group">
+        <label class="form-label">LLM 配置（对话使用的大模型）</label>
+        <select class="form-select" id="chatLLMConfig">
+          ${llmConfigs.map(l => `<option value="${l.id}" ${l.id === chatConfig.llm_config_id ? 'selected' : ''}>${l.name}</option>`).join('')}
+        </select>
+      </div>
+      
+      <div class="form-group">
+        <label style="display: flex; align-items: center; gap: 8px;">
+          <input type="checkbox" id="chatEnableSearch" ${chatConfig.enable_search ? 'checked' : ''} onchange="toggleEnableSearch()">
+          启用联网搜索
+        </label>
+        <span style="color: #999; font-size: 12px; margin-top: 4px;">开启后对话可联网搜索实时信息</span>
+      </div>
+      
+      <div class="form-group">
+        <label class="form-label">可用工具（逗号分隔）</label>
+        <input type="text" class="form-input" id="chatEnableTools" value="${chatConfig.enable_tools || ''}" placeholder="如：search,calculator">
+        <span style="color: #999; font-size: 12px;">已配置工具: ${toolConfigs.map(t => t.tool_id).join(', ')}</span>
+      </div>
+      
+      <div class="form-group">
+        <label class="form-label">历史记录数（对话上下文）</label>
+        <input type="number" class="form-input" id="chatMaxHistory" value="${chatConfig.max_history || 20}">
+        <span style="color: #999; font-size: 12px;">发送给模型的对话历史条数</span>
+      </div>
+      
+      <div class="form-group">
+        <label class="form-label">Temperature（创造性）</label>
+        <input type="number" class="form-input" id="chatTemperature" value="${chatConfig.temperature || 0.7}" step="0.1" min="0" max="2">
+        <span style="color: #999; font-size: 12px;">0-2之间，越高越随机创造性，越低越稳定精确</span>
+      </div>
+      
+      <div class="form-group">
+        <label class="form-label">系统提示词（可选）</label>
+        <textarea class="form-textarea" id="chatSystemPrompt" placeholder="全局系统提示词，对所有对话生效">${chatConfig.system_prompt || ''}</textarea>
+      </div>
+      
+      <button class="form-submit" onclick="saveChatConfig()">保存配置</button>
     </div>
     
     <div style="margin-top: 24px; padding: 16px; background: white; border-radius: 12px;">
-      <h3 style="margin-bottom: 16px;">对话配置说明</h3>
-      <p style="color: #718096; font-size: 14px;">
-        对话配置用于控制普通对话的各项参数。可以选择使用的大模型接口、启用的工具、历史记录数量等。
-        前端 APP 会自动使用默认配置进行对话。
-      </p>
+      <h3 style="margin-bottom: 16px;">参数说明</h3>
+      <div style="display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px;">
+        <div style="padding: 12px; background: #f5f7fa; border-radius: 8px;">
+          <strong>🧠 LLM配置</strong>
+          <p style="color: #718096; font-size: 12px; margin-top: 4px;">选择对话使用的大模型接口</p>
+        </div>
+        <div style="padding: 12px; background: #f5f7fa; border-radius: 8px;">
+          <strong>🔍 启用联网搜索</strong>
+          <p style="color: #718096; font-size: 12px; margin-top: 4px;">用户可在对话中开启联网搜索</p>
+        </div>
+        <div style="padding: 12px; background: #f5f7fa; border-radius: 8px;">
+          <strong>🔧 可用工具</strong>
+          <p style="color: #718096; font-size: 12px; margin-top: 4px;">对话中可使用的工具列表</p>
+        </div>
+        <div style="padding: 12px; background: #f5f7fa; border-radius: 8px;">
+          <strong>📜 历史记录数</strong>
+          <p style="color: #718096; font-size: 12px; margin-top: 4px;">发送多少条历史对话给模型</p>
+        </div>
+      </div>
     </div>
   `;
 }
 
-function showAddChatConfigModal() {
-  showModal('添加对话配置', `
-    <div class="form-group">
-      <label class="form-label">配置ID</label>
-      <input type="text" class="form-input" id="chatConfigId" placeholder="如：default">
-    </div>
-    <div class="form-group">
-      <label class="form-label">配置名称</label>
-      <input type="text" class="form-input" id="chatConfigName" placeholder="如：默认对话配置">
-    </div>
-    <div class="form-group">
-      <label class="form-label">LLM 配置</label>
-      <select class="form-select" id="chatLLMConfig">
-        ${llmConfigs.map(l => `<option value="${l.id}">${l.name}</option>`).join('')}
-      </select>
-    </div>
-    <div class="form-group">
-      <label class="form-label">可用工具（逗号分隔）</label>
-      <input type="text" class="form-input" id="chatEnableTools" placeholder="如：search,calculator">
-      <span style="color: #999; font-size: 12px;">可用工具: ${toolConfigs.map(t => t.tool_id).join(', ')}</span>
-    </div>
-    <div class="form-group">
-      <label class="form-label">历史记录数</label>
-      <input type="number" class="form-input" id="chatMaxHistory" value="20">
-    </div>
-    <div class="form-group">
-      <label class="form-label">Temperature</label>
-      <input type="number" class="form-input" id="chatTemperature" value="0.7" step="0.1">
-    </div>
-    <div class="form-group">
-      <label class="form-label">系统提示词（可选）</label>
-      <textarea class="form-textarea" id="chatSystemPrompt" placeholder="全局系统提示词"></textarea>
-    </div>
-    <button class="form-submit" onclick="saveChatConfig()">保存</button>
-  `);
-}
-
-function showEditChatConfigModal(configId) {
-  const config = chatConfigs.find(c => c.config_id === configId);
-  if (!config) return;
+function toggleEnableSearch() {
+  const enableSearch = document.getElementById('chatEnableSearch').checked;
+  const toolsInput = document.getElementById('chatEnableTools');
   
-  showModal('编辑对话配置', `
-    <div class="form-group">
-      <label class="form-label">配置ID（不可修改）</label>
-      <input type="text" class="form-input" id="chatConfigId" value="${config.config_id}" readonly style="background: #f5f7fa;">
-    </div>
-    <div class="form-group">
-      <label class="form-label">配置名称</label>
-      <input type="text" class="form-input" id="chatConfigName" value="${config.name}">
-    </div>
-    <div class="form-group">
-      <label class="form-label">LLM 配置</label>
-      <select class="form-select" id="chatLLMConfig">
-        ${llmConfigs.map(l => `<option value="${l.id}" ${l.id === config.llm_config_id ? 'selected' : ''}>${l.name}</option>`).join('')}
-      </select>
-    </div>
-    <div class="form-group">
-      <label class="form-label">可用工具（逗号分隔）</label>
-      <input type="text" class="form-input" id="chatEnableTools" value="${config.enable_tools || ''}">
-      <span style="color: #999; font-size: 12px;">可用工具: ${toolConfigs.map(t => t.tool_id).join(', ')}</span>
-    </div>
-    <div class="form-group">
-      <label class="form-label">历史记录数</label>
-      <input type="number" class="form-input" id="chatMaxHistory" value="${config.max_history || 20}">
-    </div>
-    <div class="form-group">
-      <label class="form-label">Temperature</label>
-      <input type="number" class="form-input" id="chatTemperature" value="${config.temperature || 0.7}" step="0.1">
-    </div>
-    <div class="form-group">
-      <label class="form-label">系统提示词（可选）</label>
-      <textarea class="form-textarea" id="chatSystemPrompt">${config.system_prompt || ''}</textarea>
-    </div>
-    <button class="form-submit" onclick="updateChatConfig('${configId}')">保存</button>
-  `);
+  // 自动添加/移除 search 工具
+  let tools = toolsInput.value.split(',').filter(t => t.trim());
+  if (enableSearch) {
+    if (!tools.includes('search')) {
+      tools.push('search');
+    }
+  } else {
+    tools = tools.filter(t => t !== 'search');
+  }
+  toolsInput.value = tools.join(',');
 }
 
 async function saveChatConfig() {
   const data = {
-    config_id: document.getElementById('chatConfigId').value,
-    name: document.getElementById('chatConfigName').value,
     llm_config_id: parseInt(document.getElementById('chatLLMConfig').value),
+    enable_search: document.getElementById('chatEnableSearch').checked ? 1 : 0,
     enable_tools: document.getElementById('chatEnableTools').value,
     max_history: parseInt(document.getElementById('chatMaxHistory').value),
     temperature: parseFloat(document.getElementById('chatTemperature').value),
     system_prompt: document.getElementById('chatSystemPrompt').value
   };
   
-  if (!data.config_id || !data.name) {
-    showToast('请填写完整信息');
-    return;
-  }
-  
-  await fetchAPI('/api/admin/chat', 'POST', data);
-  closeModal();
-  showToast('添加成功');
-  loadPage('chat');
-}
-
-async function updateChatConfig(configId) {
-  const data = {
-    name: document.getElementById('chatConfigName').value,
-    llm_config_id: parseInt(document.getElementById('chatLLMConfig').value),
-    enable_tools: document.getElementById('chatEnableTools').value,
-    max_history: parseInt(document.getElementById('chatMaxHistory').value),
-    temperature: parseFloat(document.getElementById('chatTemperature').value),
-    system_prompt: document.getElementById('chatSystemPrompt').value
-  };
-  
-  await fetchAPI(`/api/admin/chat/${configId}`, 'PUT', data);
-  closeModal();
-  showToast('更新成功');
-  loadPage('chat');
-}
-
-async function setDefaultChatConfig(configId) {
-  await fetchAPI(`/api/admin/chat/${configId}/default`, 'POST');
-  showToast('已设为默认');
-  loadPage('chat');
-}
-
-async function deleteChatConfig(configId) {
-  if (!confirm('确定删除此配置？')) return;
-  await fetchAPI(`/api/admin/chat/${configId}`, 'DELETE');
-  showToast('删除成功');
+  await fetchAPI('/api/admin/chat', 'PUT', data);
+  showToast('保存成功');
   loadPage('chat');
 }
 
@@ -1013,13 +940,6 @@ async function loadSystemPage(content) {
         <input type="text" class="form-input" id="appVersion" value="${systemConfigs.app_version?.value || ''}">
       </div>
       
-      <div class="form-group">
-        <label style="display: flex; align-items: center; gap: 8px;">
-          <input type="checkbox" id="enableSearch" ${systemConfigs.enable_search?.value === 'true' ? 'checked' : ''}>
-          启用联网搜索
-        </label>
-      </div>
-      
       <h3 style="margin: 24px 0 16px; padding-top: 16px; border-top: 1px solid #e2e8f0;">游客使用限制</h3>
       
       <div class="form-group">
@@ -1046,6 +966,12 @@ async function loadSystemPage(content) {
       
       <button class="form-submit" onclick="saveSystemConfig()">保存设置</button>
     </div>
+    
+    <div style="margin-top: 16px; padding: 12px; background: #f5f7fa; border-radius: 8px;">
+      <p style="color: #718096; font-size: 13px;">
+        💡 提示：启用联网搜索等对话相关配置请前往"对话配置"页面设置
+      </p>
+    </div>
   `;
 }
 
@@ -1053,7 +979,6 @@ async function saveSystemConfig() {
   const data = {
     app_name: document.getElementById('appName').value,
     app_version: document.getElementById('appVersion').value,
-    enable_search: document.getElementById('enableSearch').checked ? 'true' : 'false',
     guest_chat_sessions: document.getElementById('guestChatSessions').value,
     guest_chat_messages: document.getElementById('guestChatMessages').value,
     guest_agent_messages: document.getElementById('guestAgentMessages').value,
@@ -1062,7 +987,6 @@ async function saveSystemConfig() {
   
   await fetchAPI('/api/admin/system', 'POST', data);
   showToast('保存成功');
-  loadPage('system');
 }
 
 // ==================== 工具函数 ====================