fix: 登录后自动加载对话历史；新增生产部署指南 DEPLOY.md

- 修复 useChat useEffect 只在挂载时执行导致的登录后无历史问题 - 暴露 reloadConversations 函数，App.tsx 登录成功后主动调用 - 添加 DEPLOY.md 生产部署文档（Nginx + PHP-FPM） 2026-05-15
2026-05-15 18:20:39 +08:00
parent 893cd136c1
commit 6b26ccb1e4
16 changed files with 1076 additions and 331 deletions
@@ -0,0 +1,94 @@
+# 生产部署指南
+
+## 目录结构
+
+```
+/www/chat-app/
+├── public/                 # 前端 dist + PHP 入口
+│   ├── index.html          # 前端入口
+│   ├── assets/             # 前端 JS/CSS
+│   └── index.php           # PHP 后端入口
+├── src/                    # PHP 业务代码
+├── vendor/                 # composer 依赖
+├── chat.db                 # SQLite 数据库
+└── composer.json
+```
+
+## 部署步骤
+
+### 1. 安装 PHP 依赖
+
+```bash
+cd /www/chat-app
+composer install --no-dev --optimize-autoloader
+```
+
+### 2. 前端构建并放入 public
+
+本地执行：
+```bash
+npm run build
+cp -r dist/* server/public/
+```
+
+### 3. Nginx 配置
+
+```nginx
+server {
+    listen 80;
+    server_name your-domain.com;
+    root /www/chat-app/public;
+    index index.html index.php;
+
+    # 前端静态资源（JS/CSS/图片等）
+    location /assets/ {
+        try_files $uri =404;
+        expires 1y;
+        add_header Cache-Control "public, immutable";
+    }
+
+    # API 请求 → PHP
+    location /api/ {
+        try_files $uri /index.php$is_args$args;
+    }
+
+    # 前端路由（SPA）→ index.html
+    location / {
+        try_files $uri $uri/ /index.html;
+    }
+
+    location ~ \.php$ {
+        fastcgi_pass 127.0.0.1:9000;  # 或 unix:/run/php/php8.3-fpm.sock
+        fastcgi_index index.php;
+        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
+        include fastcgi_params;
+    }
+}
+```
+
+### 4. PHP-FPM 配置要点
+
+确保 `php.ini` 中：
+```ini
+; SQLite 需要
+extension=pdo_sqlite
+
+; SSE 流式输出需要
+output_buffering = Off
+zlib.output_compression = Off
+```
+
+### 5. 数据库权限
+
+```bash
+chmod 666 /www/chat-app/chat.db
+```
+
+## 简化版：PHP 内置服务器（仅测试）
+
+```bash
+cd /www/chat-app/public
+php -S 0.0.0.0:8000
+```
+
+> 注意：PHP 内置服务器性能差，不适合生产。
@@ -1,73 +1,82 @@
-# React + TypeScript + Vite
+# Chat App

-This template provides a minimal setup to get React working in Vite with HMR and some ESLint rules.
+一个自托管的 LLM 聊天应用，支持多会话管理、流式响应和模型配置。

-Currently, two official plugins are available:
+## 技术栈

- [@vitejs/plugin-react](https://github.com/vitejs/vite-plugin-react/blob/main/packages/plugin-react) uses [Babel](https://babeljs.io/) (or [oxc](https://oxc.rs) when used in [rolldown-vite](https://vite.dev/guide/rolldown)) for Fast Refresh
- [@vitejs/plugin-react-swc](https://github.com/vitejs/vite-plugin-react/blob/main/packages/plugin-react-swc) uses [SWC](https://swc.rs/) for Fast Refresh
+**前端**
+- React 19 + TypeScript + Vite
+- Tailwind CSS 3.4 + shadcn/ui
+- SSE 流式接收 AI 回复

-## React Compiler
+**后端**
+- PHP 8.3 + Slim 4
+- SQLite 单文件数据库
+- JWT 认证

-The React Compiler is not enabled on this template because of its impact on dev & build performances. To add it, see [this documentation](https://react.dev/learn/react-compiler/installation).
+## 功能特性

-## Expanding the ESLint configuration
+- 🖥️ 终端风格登录页
+- 💬 多会话聊天管理
+- ⚡ SSE 流式响应
+- 🔧 模型配置面板（DeepSeek / Kimi / 自定义）
+- 🔐 固定密码登录（通过 `CHAT_PASSWORD` 环境变量）
+- 📱 响应式布局

-If you are developing a production application, we recommend updating the configuration to enable type-aware lint rules:
+## 快速开始

-```js
-export default defineConfig([
-  globalIgnores(['dist']),
-  {
-    files: ['**/*.{ts,tsx}'],
-    extends: [
-      // Other configs...
+### 安装依赖

-      // Remove tseslint.configs.recommended and replace with this
-      tseslint.configs.recommendedTypeChecked,
-      // Alternatively, use this for stricter rules
-      tseslint.configs.strictTypeChecked,
-      // Optionally, add this for stylistic rules
-      tseslint.configs.stylisticTypeChecked,
+```bash
+# 前端依赖
+npm install

-      // Other configs...
-    ],
-    languageOptions: {
-      parserOptions: {
-        project: ['./tsconfig.node.json', './tsconfig.app.json'],
-        tsconfigRootDir: import.meta.dirname,
-      },
-      // other options...
-    },
-  },
-])
+# 后端依赖（PHP + Composer）
+cd server && composer install
 ```

-You can also install [eslint-plugin-react-x](https://github.com/Rel1cx/eslint-react/tree/main/packages/plugins/eslint-plugin-react-x) and [eslint-plugin-react-dom](https://github.com/Rel1cx/eslint-react/tree/main/packages/plugins/eslint-plugin-react-dom) for React-specific lint rules:
+### 开发运行

-```js
-// eslint.config.js
-import reactX from 'eslint-plugin-react-x'
-import reactDom from 'eslint-plugin-react-dom'
+```bash
+# 同时启动前端和后端
+npm run dev

-export default defineConfig([
-  globalIgnores(['dist']),
-  {
-    files: ['**/*.{ts,tsx}'],
-    extends: [
-      // Other configs...
-      // Enable lint rules for React
-      reactX.configs['recommended-typescript'],
-      // Enable lint rules for React DOM
-      reactDom.configs.recommended,
-    ],
-    languageOptions: {
-      parserOptions: {
-        project: ['./tsconfig.node.json', './tsconfig.app.json'],
-        tsconfigRootDir: import.meta.dirname,
-      },
-      // other options...
-    },
-  },
-])
+# 前端 http://localhost:3000
+# 后端 http://localhost:8000
+```
+
+### 生产构建
+
+```bash
+# 构建前端
+npm run build
+
+# 后端无需构建，直接部署 server/ 目录即可
+```
+
+## 环境变量
+
+| 变量 | 说明 | 默认值 |
+|------|------|--------|
+| `CHAT_PASSWORD` | 登录密码 | `admin` |
+| `JWT_SECRET` | JWT 签名密钥 | 内置默认值 |
+
+## 部署
+
+将以下目录上传至服务器：
+- `dist/` — 前端构建产物
+- `server/` — PHP 后端源码
+
+配置 Web 服务器将 `server/public/` 设为根目录，并设置 `dist/` 的别名。
+
+## 项目结构
+
+```
+chat-app/
+├── src/              # 前端源码
+├── server/           # PHP 后端
+│   ├── public/       # Web 入口
+│   └── src/          # 业务代码
+├── dist/             # 前端构建产物（Git 忽略）
+└── package.json
 ```
@@ -6,7 +6,7 @@
  "scripts": {
    "dev": "concurrently \"npm run dev:server\" \"npm run dev:client\"",
    "dev:client": "vite",
-    "dev:server": "cd server && php -S localhost:8000 -t public",
+    "dev:server": "cd server && /opt/homebrew/bin/php -S localhost:8000 -t public",
    "build": "tsc -b && vite build",
    "lint": "eslint .",
    "preview": "vite preview"
@@ -9,7 +9,7 @@ require __DIR__ . '/../src/jwt.php';

 $app = AppFactory::create();

-// CORS for dev
+// 开发环境跨域支持
 $app->add(function ($request, $handler) {
    $response = $handler->handle($request);
    return $response
@@ -21,15 +21,15 @@ $app->add(function ($request, $handler) {
 $app->addRoutingMiddleware();
 $app->addErrorMiddleware(true, true, true);

-// Options handler
+// OPTIONS 预检请求处理
 $app->options('/{routes:.+}', function ($request, $response) {
    return $response;
 });

-// Init DB
+// 初始化数据库
 getDb();

-// Register routes
+// 注册路由
 require __DIR__ . '/../src/routes.php';

 $app->run();
@@ -15,6 +15,8 @@ function getDb(): PDO {

    if ($isNew) {
        initDb($pdo);
+    } else {
+        migrateDb($pdo);
    }

    return $pdo;
@@ -37,8 +39,8 @@ function initDb(PDO $pdo): void {
            model_base_url TEXT,
            model_id TEXT,
            api_key TEXT,
-            temperature REAL DEFAULT 0.7,
-            max_tokens INTEGER DEFAULT 4096,
+            temperature REAL DEFAULT 0.2,
+            max_tokens INTEGER DEFAULT 8192,
            system_prompt TEXT,
            created_at INTEGER NOT NULL,
            updated_at INTEGER NOT NULL
@@ -49,10 +51,41 @@ function initDb(PDO $pdo): void {
            conversation_id TEXT NOT NULL REFERENCES conversations(id) ON DELETE CASCADE,
            role TEXT NOT NULL CHECK(role IN ('user','assistant','system')),
            content TEXT NOT NULL DEFAULT '',
+            thinking TEXT DEFAULT NULL,
+            prompt_tokens INTEGER DEFAULT 0,
+            completion_tokens INTEGER DEFAULT 0,
            timestamp INTEGER NOT NULL
        );

+        CREATE TABLE IF NOT EXISTS model_configs (
+            id TEXT PRIMARY KEY,
+            user_id TEXT NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+            name TEXT NOT NULL,
+            base_url TEXT,
+            model_id TEXT,
+            api_key TEXT,
+            temperature REAL DEFAULT 0.2,
+            max_tokens INTEGER DEFAULT 8192,
+            system_prompt TEXT,
+            created_at INTEGER NOT NULL,
+            updated_at INTEGER NOT NULL
+        );
+
        CREATE INDEX IF NOT EXISTS idx_messages_conversation ON messages(conversation_id);
        CREATE INDEX IF NOT EXISTS idx_conversations_user ON conversations(user_id);
    ");
 }
+
+// 数据库迁移：检查并添加新列
+function migrateDb(PDO $pdo): void {
+    $columns = $pdo->query("PRAGMA table_info(messages)")->fetchAll(PDO::FETCH_COLUMN, 1);
+    if (!in_array('thinking', $columns)) {
+        $pdo->exec("ALTER TABLE messages ADD COLUMN thinking TEXT DEFAULT NULL");
+    }
+    if (!in_array('prompt_tokens', $columns)) {
+        $pdo->exec("ALTER TABLE messages ADD COLUMN prompt_tokens INTEGER DEFAULT 0");
+    }
+    if (!in_array('completion_tokens', $columns)) {
+        $pdo->exec("ALTER TABLE messages ADD COLUMN completion_tokens INTEGER DEFAULT 0");
+    }
+}
@@ -3,7 +3,7 @@
 use Psr\Http\Message\ResponseInterface as Response;
 use Psr\Http\Message\ServerRequestInterface as Request;

-// Auth middleware
+// JWT 认证中间件：验证请求头中的 Bearer Token
 $authMiddleware = function (Request $request, $handler) {
    $authHeader = $request->getHeaderLine('Authorization');
    if (!$authHeader || !str_starts_with($authHeader, 'Bearer ')) {
@@ -22,13 +22,13 @@ $authMiddleware = function (Request $request, $handler) {
    return $handler->handle($request);
 };

-// Health check
+// 健康检查接口
 $app->get('/api/health', function (Request $request, Response $response) {
    $response->getBody()->write(json_encode(['status' => 'ok']));
    return $response->withHeader('Content-Type', 'application/json');
 });

-// Auth routes
+// 认证路由
 $app->post('/api/auth/login', function (Request $request, Response $response) {
    $body = json_decode((string)$request->getBody(), true);
    $password = $body['password'] ?? '';
@@ -61,7 +61,7 @@ $app->get('/api/auth/me', function (Request $request, Response $response) {
    return $response->withHeader('Content-Type', 'application/json');
 })->add($authMiddleware);

-// Conversation routes
+// 会话路由
 $app->get('/api/conversations', function (Request $request, Response $response) {
    $userId = $request->getAttribute('userId');
    $db = getDb();
@@ -85,7 +85,7 @@ $app->get('/api/conversations/{id}', function (Request $request, Response $respo
        return $response->withStatus(404)->withHeader('Content-Type', 'application/json');
    }

-    $stmt = $db->prepare('SELECT id, role, content, timestamp FROM messages WHERE conversation_id = ? ORDER BY timestamp ASC');
+    $stmt = $db->prepare('SELECT id, role, content, thinking, prompt_tokens, completion_tokens, timestamp FROM messages WHERE conversation_id = ? ORDER BY timestamp ASC');
    $stmt->execute([$id]);
    $messages = $stmt->fetchAll();

@@ -110,8 +110,8 @@ $app->post('/api/conversations', function (Request $request, Response $response)
        $modelConfig['baseUrl'] ?? null,
        $modelConfig['model'] ?? null,
        $modelConfig['apiKey'] ?? null,
-        $modelConfig['temperature'] ?? 0.7,
-        $modelConfig['maxTokens'] ?? 4096,
+        $modelConfig['temperature'] ?? 0.2,
+        $modelConfig['maxTokens'] ?? 8192,
        $modelConfig['systemPrompt'] ?? null,
        $now, $now
    ]);
@@ -157,7 +157,7 @@ $app->put('/api/conversations/{id}', function (Request $request, Response $respo
    $stmt->execute([$id]);
    $conv = $stmt->fetch();

-    $stmt = $db->prepare('SELECT id, role, content, timestamp FROM messages WHERE conversation_id = ? ORDER BY timestamp ASC');
+    $stmt = $db->prepare('SELECT id, role, content, thinking, prompt_tokens, completion_tokens, timestamp FROM messages WHERE conversation_id = ? ORDER BY timestamp ASC');
    $stmt->execute([$id]);
    $messages = $stmt->fetchAll();

@@ -203,14 +203,15 @@ $app->delete('/api/conversations/{id}/messages', function (Request $request, Res
    return $response->withHeader('Content-Type', 'application/json');
 })->add($authMiddleware);

-// Chat route (SSE)
+// 聊天路由（SSE 流式响应）
 $app->post('/api/chat', function (Request $request, Response $response) {
    $userId = $request->getAttribute('userId');
    $body = json_decode((string)$request->getBody(), true);
    $conversationId = $body['conversationId'] ?? '';
    $content = trim($body['content'] ?? '');
+    $regenerateFrom = $body['regenerateFrom'] ?? null;  // 重新生成：从指定消息 ID 开始

-    if (!$conversationId || !$content) {
+    if (!$conversationId || (!$content && !$regenerateFrom)) {
        $response->getBody()->write(json_encode(['error' => 'conversationId and content required']));
        return $response->withStatus(400)->withHeader('Content-Type', 'application/json');
    }
@@ -225,12 +226,12 @@ $app->post('/api/chat', function (Request $request, Response $response) {
        return $response->withStatus(404)->withHeader('Content-Type', 'application/json');
    }

-    // Load history
+    // 加载历史消息
    $stmt = $db->prepare("SELECT role, content FROM messages WHERE conversation_id = ? ORDER BY timestamp ASC");
    $stmt->execute([$conversationId]);
    $history = $stmt->fetchAll();

-    // Build messages
+    // 构建消息列表
    $messages = [];
    if ($conv['system_prompt']) {
        $messages[] = ['role' => 'system', 'content' => $conv['system_prompt']];
@@ -242,13 +243,30 @@ $app->post('/api/chat', function (Request $request, Response $response) {
    }
    $messages[] = ['role' => 'user', 'content' => $content];

-    // Save user message
-    $userMsgId = bin2hex(random_bytes(16));
-    $now = time() * 1000;
-    $stmt = $db->prepare('INSERT INTO messages (id, conversation_id, role, content, timestamp) VALUES (?, ?, ?, ?, ?)');
-    $stmt->execute([$userMsgId, $conversationId, 'user', $content, $now]);
+    // 处理重新生成：删除指定消息之后的所有消息
+    if ($regenerateFrom) {
+        $stmt = $db->prepare('SELECT id, content, timestamp FROM messages WHERE id = ? AND conversation_id = ? AND role = ?');
+        $stmt->execute([$regenerateFrom, $conversationId, 'user']);
+        $targetMsg = $stmt->fetch();
+        if (!$targetMsg) {
+            $response->getBody()->write(json_encode(['error' => 'Message not found']));
+            return $response->withStatus(404)->withHeader('Content-Type', 'application/json');
+        }
+        $content = $targetMsg['content'];
+        $userMsgId = $targetMsg['id'];
+        $now = $targetMsg['timestamp'];
+        // 删除该消息之后的所有消息
+        $stmt = $db->prepare('DELETE FROM messages WHERE conversation_id = ? AND timestamp > ?');
+        $stmt->execute([$conversationId, $now]);
+    } else {
+        // 保存新的用户消息
+        $userMsgId = bin2hex(random_bytes(16));
+        $now = time() * 1000;
+        $stmt = $db->prepare('INSERT INTO messages (id, conversation_id, role, content, timestamp) VALUES (?, ?, ?, ?, ?)');
+        $stmt->execute([$userMsgId, $conversationId, 'user', $content, $now]);
+    }

-    // Update title if first message
+    // 如果是第一条消息，自动更新会话标题
    $stmt = $db->prepare('SELECT COUNT(*) as cnt FROM messages WHERE conversation_id = ?');
    $stmt->execute([$conversationId]);
    $msgCount = $stmt->fetch()['cnt'] ?? 0;
@@ -258,7 +276,7 @@ $app->post('/api/chat', function (Request $request, Response $response) {
        $stmt->execute([$newTitle, $now, $conversationId]);
    }

-    // Check model config
+    // 检查模型配置是否完整
    if (!$conv['model_base_url'] || !$conv['api_key'] || !$conv['model_id']) {
        $errMsg = 'Error: 模型配置不完整，请先在「配置」中设置 API 地址、API Key 和模型 ID';
        $errMsgId = bin2hex(random_bytes(16));
@@ -268,7 +286,7 @@ $app->post('/api/chat', function (Request $request, Response $response) {
        return $response->withStatus(400)->withHeader('Content-Type', 'application/json');
    }

-    // SSE output
+    // 设置 SSE 响应头
    header('Content-Type: text/event-stream');
    header('Cache-Control: no-cache');
    header('Connection: keep-alive');
@@ -277,13 +295,17 @@ $app->post('/api/chat', function (Request $request, Response $response) {
    while (ob_get_level() > 0) ob_end_flush();
    ob_implicit_flush(true);

-    // Send user message confirmation
+    // 发送用户消息确认事件
    echo "data: " . json_encode(['type' => 'user', 'id' => $userMsgId, 'content' => $content]) . "\n\n";
    flush();

-    // Call LLM API via curl
+    // 通过 curl 调用大模型 API（支持 DeepSeek V4 reasoning_content）
    $assistantMsgId = bin2hex(random_bytes(16));
    $fullContent = '';
+    $fullThinking = '';
+    $promptTokens = 0;
+    $completionTokens = 0;
+    $inThinking = true;  // 当前是否在接收 thinking 内容

    $payload = json_encode([
        'model' => $conv['model_id'],
@@ -291,8 +313,15 @@ $app->post('/api/chat', function (Request $request, Response $response) {
        'temperature' => (float)$conv['temperature'],
        'max_tokens' => (int)$conv['max_tokens'],
        'stream' => true,
+        'stream_options' => ['include_usage' => true],
    ]);

+    // 检测连接是否中断（用户点击停止）
+    $aborted = false;
+    if (function_exists('connection_aborted')) {
+        $aborted = connection_aborted();
+    }
+
    $ch = curl_init($conv['model_base_url'] . '/chat/completions');
    curl_setopt_array($ch, [
        CURLOPT_POST => true,
@@ -302,7 +331,13 @@ $app->post('/api/chat', function (Request $request, Response $response) {
            'Authorization: Bearer ' . $conv['api_key'],
        ],
        CURLOPT_RETURNTRANSFER => false,
-        CURLOPT_WRITEFUNCTION => function ($ch, $data) use (&$fullContent) {
+        CURLOPT_WRITEFUNCTION => function ($ch, $data) use (
+            &$fullContent, &$fullThinking, &$inThinking, &$promptTokens, &$completionTokens, &$aborted
+        ) {
+            if ($aborted || connection_aborted()) {
+                $aborted = true;
+                return 0; // 返回 0 中断 curl
+            }
            $lines = explode("\n", $data);
            foreach ($lines as $line) {
                $line = trim($line);
@@ -311,10 +346,38 @@ $app->post('/api/chat', function (Request $request, Response $response) {
                if ($jsonStr === '[DONE]') continue;
                $parsed = json_decode($jsonStr, true);
                if (!$parsed) continue;
-                $delta = $parsed['choices'][0]['delta']['content'] ?? '';
-                if ($delta) {
-                    $fullContent .= $delta;
-                    echo "data: " . json_encode(['type' => 'delta', 'content' => $delta]) . "\n\n";
+
+                // 处理 usage（最后一个 chunk）
+                if (isset($parsed['usage'])) {
+                    $promptTokens = $parsed['usage']['prompt_tokens'] ?? 0;
+                    $completionTokens = $parsed['usage']['completion_tokens'] ?? 0;
+                    continue;
+                }
+
+                $choice = $parsed['choices'][0] ?? null;
+                if (!$choice) continue;
+                $delta = $choice['delta'] ?? [];
+
+                // DeepSeek V4: reasoning_content（思考过程）
+                $reasoning = $delta['reasoning_content'] ?? '';
+                if ($reasoning) {
+                    $fullThinking .= $reasoning;
+                    echo "data: " . json_encode(['type' => 'thinking', 'content' => $reasoning]) . "\n\n";
+                    flush();
+                    continue;
+                }
+
+                // 正常 content（最终答案）
+                $content = $delta['content'] ?? '';
+                if ($content) {
+                    // 第一次收到 content，表示 thinking 结束
+                    if ($inThinking && $fullThinking) {
+                        $inThinking = false;
+                        echo "data: " . json_encode(['type' => 'thinking_end']) . "\n\n";
+                        flush();
+                    }
+                    $fullContent .= $content;
+                    echo "data: " . json_encode(['type' => 'delta', 'content' => $content]) . "\n\n";
                    flush();
                }
            }
@@ -324,26 +387,128 @@ $app->post('/api/chat', function (Request $request, Response $response) {
        CURLOPT_CONNECTTIMEOUT => 30,
    ]);

-    $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
    curl_exec($ch);
    $error = curl_error($ch);
+    $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
    curl_close($ch);

-    if ($error) {
+    if ($error && $error !== 'Callback aborted') {
        $errMsg = 'Error: ' . $error;
        echo "data: " . json_encode(['type' => 'error', 'content' => $errMsg]) . "\n\n";
    }

-    // Save assistant message
-    $stmt = $db->prepare('INSERT INTO messages (id, conversation_id, role, content, timestamp) VALUES (?, ?, ?, ?, ?)');
-    $stmt->execute([$assistantMsgId, $conversationId, 'assistant', $fullContent, time() * 1000]);
+    if ($httpCode >= 400) {
+        $errMsg = "API 请求失败 (HTTP {$httpCode})";
+        echo "data: " . json_encode(['type' => 'error', 'content' => $errMsg]) . "\n\n";
+    }
+
+    // 保存助手回复消息（包含 thinking 和 token 用量）
+    $stmt = $db->prepare('INSERT INTO messages (id, conversation_id, role, content, thinking, prompt_tokens, completion_tokens, timestamp) VALUES (?, ?, ?, ?, ?, ?, ?, ?)');
+    $stmt->execute([
+        $assistantMsgId, $conversationId, 'assistant',
+        $fullContent, $fullThinking ?: null,
+        $promptTokens, $completionTokens,
+        time() * 1000
+    ]);

    $stmt = $db->prepare('UPDATE conversations SET updated_at = ? WHERE id = ?');
    $stmt->execute([time() * 1000, $conversationId]);

-    echo "data: " . json_encode(['type' => 'done', 'id' => $assistantMsgId, 'content' => $fullContent]) . "\n\n";
+    echo "data: " . json_encode([
+        'type' => 'done',
+        'id' => $assistantMsgId,
+        'content' => $fullContent,
+        'thinking' => $fullThinking,
+        'promptTokens' => $promptTokens,
+        'completionTokens' => $completionTokens,
+    ]) . "\n\n";
    echo "data: [DONE]\n\n";
    flush();

    exit(0);
 })->add($authMiddleware);
+
+// ========== 模型配置模板路由 ==========
+
+// 获取当前用户的配置列表
+$app->get('/api/model-configs', function (Request $request, Response $response) {
+    $userId = $request->getAttribute('userId');
+    $db = getDb();
+    $stmt = $db->prepare('SELECT id, name, base_url, model_id, api_key, temperature, max_tokens, system_prompt, created_at, updated_at FROM model_configs WHERE user_id = ? ORDER BY updated_at DESC');
+    $stmt->execute([$userId]);
+    $rows = $stmt->fetchAll();
+    $response->getBody()->write(json_encode($rows));
+    return $response->withHeader('Content-Type', 'application/json');
+})->add($authMiddleware);
+
+// 创建配置
+$app->post('/api/model-configs', function (Request $request, Response $response) {
+    $userId = $request->getAttribute('userId');
+    $body = json_decode((string)$request->getBody(), true);
+    $db = getDb();
+    $id = bin2hex(random_bytes(16));
+    $now = time() * 1000;
+    $stmt = $db->prepare('INSERT INTO model_configs (id, user_id, name, base_url, model_id, api_key, temperature, max_tokens, system_prompt, created_at, updated_at) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)');
+    $stmt->execute([
+        $id, $userId,
+        $body['name'] ?? '未命名',
+        $body['baseUrl'] ?? null,
+        $body['model'] ?? null,
+        $body['apiKey'] ?? null,
+        $body['temperature'] ?? 0.2,
+        $body['maxTokens'] ?? 8192,
+        $body['systemPrompt'] ?? null,
+        $now, $now
+    ]);
+    $stmt = $db->prepare('SELECT * FROM model_configs WHERE id = ?');
+    $stmt->execute([$id]);
+    $row = $stmt->fetch();
+    $response->getBody()->write(json_encode($row));
+    return $response->withStatus(201)->withHeader('Content-Type', 'application/json');
+})->add($authMiddleware);
+
+// 更新配置
+$app->put('/api/model-configs/{id}', function (Request $request, Response $response, array $args) {
+    $userId = $request->getAttribute('userId');
+    $id = $args['id'];
+    $body = json_decode((string)$request->getBody(), true);
+    $db = getDb();
+    $stmt = $db->prepare('SELECT id FROM model_configs WHERE id = ? AND user_id = ?');
+    $stmt->execute([$id, $userId]);
+    if (!$stmt->fetch()) {
+        $response->getBody()->write(json_encode(['error' => 'Config not found']));
+        return $response->withStatus(404)->withHeader('Content-Type', 'application/json');
+    }
+    $now = time() * 1000;
+    $stmt = $db->prepare('UPDATE model_configs SET name = ?, base_url = ?, model_id = ?, api_key = ?, temperature = ?, max_tokens = ?, system_prompt = ?, updated_at = ? WHERE id = ?');
+    $stmt->execute([
+        $body['name'] ?? null,
+        $body['baseUrl'] ?? null,
+        $body['model'] ?? null,
+        $body['apiKey'] ?? null,
+        $body['temperature'] ?? null,
+        $body['maxTokens'] ?? null,
+        $body['systemPrompt'] ?? null,
+        $now, $id
+    ]);
+    $stmt = $db->prepare('SELECT * FROM model_configs WHERE id = ?');
+    $stmt->execute([$id]);
+    $row = $stmt->fetch();
+    $response->getBody()->write(json_encode($row));
+    return $response->withHeader('Content-Type', 'application/json');
+})->add($authMiddleware);
+
+// 删除配置
+$app->delete('/api/model-configs/{id}', function (Request $request, Response $response, array $args) {
+    $userId = $request->getAttribute('userId');
+    $id = $args['id'];
+    $db = getDb();
+    $stmt = $db->prepare('DELETE FROM model_configs WHERE id = ? AND user_id = ?');
+    $stmt->execute([$id, $userId]);
+    if ($stmt->rowCount() === 0) {
+        $response->getBody()->write(json_encode(['error' => 'Config not found']));
+        return $response->withStatus(404)->withHeader('Content-Type', 'application/json');
+    }
+    $response->getBody()->write(json_encode(['success' => true]));
+    return $response->withHeader('Content-Type', 'application/json');
+})->add($authMiddleware);
@@ -18,21 +18,34 @@ function App() {
    updateModelConfig,
    clearMessages,
    sendMessage,
+    regenerateMessage,
    stopStreaming,
+    reloadConversations,
  } = useChat();

  const [sidebarOpen, setSidebarOpen] = useState(true);

+  const handleLogin = async (password: string) => {
+    const ok = await login(password);
+    if (ok) {
+      reloadConversations();
+    }
+    return ok;
+  };
+
  if (isLoading) {
    return (
-      <div className="w-screen h-screen flex items-center justify-center bg-white">
-        <div className="text-sm text-[#999]">加载中...</div>
+      <div className="w-screen h-screen flex items-center justify-center bg-[#0d0d0d]">
+        <div className="flex flex-col items-center gap-3">
+          <div className="w-6 h-6 border-2 border-[#333] border-t-[#0f0] rounded-full animate-spin" />
+          <span className="font-mono text-xs text-[#555]">INITIALIZING...</span>
+        </div>
      </div>
    );
  }

  if (!isAuthenticated) {
-    return <LoginPage onLogin={login} />;
+    return <LoginPage onLogin={handleLogin} />;
  }

  return (
@@ -53,6 +66,7 @@ function App() {
        conversation={activeConversation}
        isStreaming={isStreaming}
        onSendMessage={sendMessage}
+        onRegenerateMessage={regenerateMessage}
        onStopStreaming={stopStreaming}
        sidebarOpen={sidebarOpen}
        onToggleSidebar={() => setSidebarOpen(prev => !prev)}
@@ -1,20 +1,25 @@
 const API_BASE = import.meta.env.VITE_API_BASE || '';

 export interface ChatStreamEvent {
-  type: 'user' | 'delta' | 'done' | 'error';
+  type: 'user' | 'thinking' | 'thinking_end' | 'delta' | 'done' | 'error';
  id?: string;
  content?: string;
+  thinking?: string;
+  promptTokens?: number;
+  completionTokens?: number;
 }

-export async function* sendMessageStream(conversationId: string, content: string): AsyncGenerator<ChatStreamEvent> {
+export async function* sendMessageStream(conversationId: string, content: string, regenerateFrom?: string): AsyncGenerator<ChatStreamEvent> {
  const token = localStorage.getItem('chat_token');
+  const body: Record<string, string> = { conversationId, content };
+  if (regenerateFrom) body.regenerateFrom = regenerateFrom;
  const res = await fetch(`${API_BASE}/api/chat`, {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json',
      ...(token ? { Authorization: `Bearer ${token}` } : {}),
    },
-    body: JSON.stringify({ conversationId, content }),
+    body: JSON.stringify(body),
  });

  if (!res.ok) {
@@ -5,6 +5,9 @@ export interface ApiMessage {
  id: string;
  role: 'user' | 'assistant' | 'system';
  content: string;
+  thinking: string | null;
+  prompt_tokens: number;
+  completion_tokens: number;
  timestamp: number;
 }

@@ -29,8 +32,8 @@ function rowToModelConfig(row: ApiConversation): ModelConfig {
    apiKey: row.api_key || '',
    baseUrl: row.model_base_url || '',
    model: row.model_id || '',
-    temperature: row.temperature ?? 0.7,
-    maxTokens: row.max_tokens ?? 4096,
+    temperature: row.temperature ?? 0.2,
+    maxTokens: row.max_tokens ?? 8192,
    systemPrompt: row.system_prompt || '',
  };
 }
@@ -0,0 +1,84 @@
+import { apiGet, apiPost, apiPut, apiDelete } from './client';
+import type { ModelConfig } from '@/types';
+
+interface ApiModelConfig {
+  id: string;
+  name: string;
+  base_url: string;
+  model_id: string;
+  api_key: string;
+  temperature: number;
+  max_tokens: number;
+  system_prompt: string;
+  created_at: number;
+  updated_at: number;
+}
+
+function rowToModelConfig(row: ApiModelConfig): ModelConfig {
+  return {
+    name: row.name,
+    apiKey: row.api_key || '',
+    baseUrl: row.base_url || '',
+    model: row.model_id || '',
+    temperature: row.temperature ?? 0.2,
+    maxTokens: row.max_tokens ?? 8192,
+    systemPrompt: row.system_prompt || '',
+  };
+}
+
+export interface SavedModelConfig {
+  id: string;
+  config: ModelConfig;
+  createdAt: number;
+  updatedAt: number;
+}
+
+export async function listModelConfigs(): Promise<SavedModelConfig[]> {
+  const rows = await apiGet('/model-configs') as ApiModelConfig[];
+  return rows.map(row => ({
+    id: row.id,
+    config: rowToModelConfig(row),
+    createdAt: row.created_at,
+    updatedAt: row.updated_at,
+  }));
+}
+
+export async function createModelConfig(config: ModelConfig): Promise<SavedModelConfig> {
+  const row = await apiPost('/model-configs', {
+    name: config.name,
+    baseUrl: config.baseUrl,
+    model: config.model,
+    apiKey: config.apiKey,
+    temperature: config.temperature,
+    maxTokens: config.maxTokens,
+    systemPrompt: config.systemPrompt,
+  }) as ApiModelConfig;
+  return {
+    id: row.id,
+    config: rowToModelConfig(row),
+    createdAt: row.created_at,
+    updatedAt: row.updated_at,
+  };
+}
+
+export async function updateModelConfig(id: string, config: ModelConfig): Promise<SavedModelConfig> {
+  const row = await apiPut(`/model-configs/${id}`, {
+    name: config.name,
+    baseUrl: config.baseUrl,
+    model: config.model,
+    apiKey: config.apiKey,
+    temperature: config.temperature,
+    maxTokens: config.maxTokens,
+    systemPrompt: config.systemPrompt,
+  }) as ApiModelConfig;
+  return {
+    id: row.id,
+    config: rowToModelConfig(row),
+    createdAt: row.created_at,
+    updatedAt: row.updated_at,
+  };
+}
+
+export async function deleteModelConfig(id: string): Promise<void> {
+  await apiDelete(`/model-configs/${id}`);
+}
@@ -1,5 +1,6 @@
 import { useState, useRef, useEffect, useCallback } from 'react';
 import ReactMarkdown from 'react-markdown';
+import remarkGfm from 'remark-gfm';
 import { Prism as SyntaxHighlighter } from 'react-syntax-highlighter';
 import { vscDarkPlus } from 'react-syntax-highlighter/dist/esm/styles/prism';
 import {
@@ -11,6 +12,7 @@ import {
  Check,
  Menu,
  Sparkles,
+  RefreshCw,
 } from 'lucide-react';
 import type { Conversation, Message } from '@/types';

@@ -18,6 +20,7 @@ interface ChatAreaProps {
  conversation: Conversation | null;
  isStreaming: boolean;
  onSendMessage: (content: string) => void;
+  onRegenerateMessage: (messageId: string) => void;
  onStopStreaming: () => void;
  sidebarOpen: boolean;
  onToggleSidebar: () => void;
@@ -60,8 +63,9 @@ function CodeBlock({ language, value }: { language: string; value: string }) {
  );
 }

-function MessageBubble({ message, isStreaming }: { message: Message; isStreaming: boolean }) {
+function MessageBubble({ message, isStreaming, onRegenerate }: { message: Message; isStreaming: boolean; onRegenerate?: () => void }) {
  const [copied, setCopied] = useState(false);
+  const [thinkingOpen, setThinkingOpen] = useState(false);

  const handleCopy = async () => {
    await navigator.clipboard.writeText(message.content);
@@ -101,9 +105,30 @@ function MessageBubble({ message, isStreaming }: { message: Message; isStreaming
          </span>
        </div>
        <div className="group relative">
+          {/* 思考过程（可折叠） */}
+          {message.thinking && (
+            <div className="mb-3">
+              <button
+                onClick={() => setThinkingOpen(!thinkingOpen)}
+                className="flex items-center gap-1.5 text-xs text-[#888] hover:text-[#16a34a] transition-colors"
+              >
+                <svg className={`w-3 h-3 transition-transform ${thinkingOpen ? 'rotate-90' : ''}`} fill="none" viewBox="0 0 24 24" stroke="currentColor" strokeWidth={2}>
+                  <path strokeLinecap="round" strokeLinejoin="round" d="M9 5l7 7-7 7" />
+                </svg>
+                <span>思考过程</span>
+                <span className="text-[#bbb]">({message.thinking.length} 字)</span>
+              </button>
+              {thinkingOpen && (
+                <div className="mt-2 p-3 bg-[#f8f8f8] border border-[#e5e5e5] rounded-lg text-xs text-[#888] leading-relaxed whitespace-pre-wrap font-mono">
+                  {message.thinking}
+                </div>
+              )}
+            </div>
+          )}
          {message.content || isStreaming ? (
-            <div className="text-[#d4d4d4] text-sm leading-relaxed">
+            <div className="text-[#333] text-sm leading-relaxed">
              <ReactMarkdown
+                remarkPlugins={[remarkGfm]}
                components={{
                  code({ inline, className, children, ...props }: any) {
                    const match = /language-(\w+)/.exec(className || '');
@@ -176,7 +201,7 @@ function MessageBubble({ message, isStreaming }: { message: Message; isStreaming
                {message.content || (isStreaming ? '' : '')}
              </ReactMarkdown>

-              {/* Streaming cursor */}
+              {/* 流式输出光标 */}
              {isStreaming && !message.content && (
                <span className="inline-block w-2 h-4 bg-[#0f0] animate-pulse ml-0.5" />
              )}
@@ -189,15 +214,37 @@ function MessageBubble({ message, isStreaming }: { message: Message; isStreaming
            </div>
          )}

-          {/* Copy button for assistant messages */}
-          {message.content && (
-            <button
-              onClick={handleCopy}
-              className="absolute -right-8 top-0 p-1 text-[#ccc] hover:text-[#16a34a] opacity-0 group-hover:opacity-100 transition-all"
-            >
-              {copied ? <Check className="w-3.5 h-3.5" /> : <Copy className="w-3.5 h-3.5" />}
-            </button>
+          {/* Token 用量 */}
+          {(message.promptTokens || message.completionTokens) && (
+            <div className="flex items-center gap-3 mt-2 text-[10px] text-[#bbb]">
+              {message.promptTokens ? <span>输入: {message.promptTokens} tokens</span> : null}
+              {message.completionTokens ? <span>输出: {message.completionTokens} tokens</span> : null}
+            </div>
          )}
+
+          {/* 操作按钮：复制 + 重新生成 */}
+          <div className="flex items-center gap-2 mt-2">
+            {message.content && (
+              <button
+                onClick={handleCopy}
+                className="flex items-center gap-1 text-[10px] text-[#bbb] hover:text-[#16a34a] transition-colors"
+                title="复制"
+              >
+                {copied ? <Check className="w-3 h-3" /> : <Copy className="w-3 h-3" />}
+                <span>{copied ? '已复制' : '复制'}</span>
+              </button>
+            )}
+            {onRegenerate && message.content && !isStreaming && (
+              <button
+                onClick={onRegenerate}
+                className="flex items-center gap-1 text-[10px] text-[#bbb] hover:text-[#16a34a] transition-colors"
+                title="重新生成"
+              >
+                <RefreshCw className="w-3 h-3" />
+                <span>重新生成</span>
+              </button>
+            )}
+          </div>
        </div>
      </div>
    </div>
@@ -208,6 +255,7 @@ export default function ChatArea({
  conversation,
  isStreaming,
  onSendMessage,
+  onRegenerateMessage,
  onStopStreaming,
  sidebarOpen,
  onToggleSidebar,
@@ -216,7 +264,7 @@ export default function ChatArea({
  const textareaRef = useRef<HTMLTextAreaElement>(null);
  const messagesEndRef = useRef<HTMLDivElement>(null);

-  // Auto-resize textarea
+  // 输入框自动调整高度
  useEffect(() => {
    const textarea = textareaRef.current;
    if (textarea) {
@@ -225,7 +273,7 @@ export default function ChatArea({
    }
  }, [input]);

-  // Auto-scroll to bottom
+  // 自动滚动到底部
  useEffect(() => {
    messagesEndRef.current?.scrollIntoView({ behavior: 'smooth' });
  }, [conversation?.messages]);
@@ -249,7 +297,7 @@ export default function ChatArea({

  return (
    <div className="flex-1 flex flex-col h-full bg-white relative">
-      {/* Header */}
+      {/* 顶部标题栏 */}
      <div className="flex items-center justify-between px-4 py-3 border-b border-[#1a1a1a]">
        <div className="flex items-center gap-3">
          {!sidebarOpen && (
@@ -279,7 +327,7 @@ export default function ChatArea({
        )}
      </div>

-      {/* Messages area */}
+      {/* 消息列表区域 */}
      <div className="flex-1 overflow-y-auto px-4 md:px-8 py-6 custom-scrollbar">
        {!conversation || conversation.messages.length === 0 ? (
          <div className="flex flex-col items-center justify-center h-full text-[#bbb]">
@@ -310,11 +358,18 @@ export default function ChatArea({
          </div>
        ) : (
          <div className="max-w-3xl mx-auto">
-            {conversation.messages.map(message => (
+            {conversation.messages.map((message, idx) => (
              <MessageBubble
                key={message.id}
                message={message}
                isStreaming={isStreaming && message.role === 'assistant' && message.id === conversation.messages[conversation.messages.length - 1]?.id}
+                onRegenerate={message.role === 'user' ? undefined : () => {
+                  // 找到该助手消息对应的用户消息
+                  const userMsg = conversation.messages[idx - 1];
+                  if (userMsg && userMsg.role === 'user') {
+                    onRegenerateMessage(userMsg.id);
+                  }
+                }}
              />
            ))}
            <div ref={messagesEndRef} />
@@ -322,7 +377,7 @@ export default function ChatArea({
        )}
      </div>

-      {/* Input area */}
+      {/* 输入区域 */}
      <div className="px-4 md:px-8 pb-6 pt-4">
        <div className="max-w-3xl mx-auto relative">
          <div className="flex items-end gap-3 bg-white border border-[#d0d0d0] rounded-xl p-4 shadow-md transition-all">
@@ -14,9 +14,14 @@ import {
  Key,
  Save,
  RotateCcw,
+  Pencil,
+  ChevronLeft,
+  Layers,
 } from 'lucide-react';
 import type { Conversation, ModelConfig } from '@/types';
 import { PRESET_MODELS, DEFAULT_MODEL_CONFIG } from '@/types';
+import { listModelConfigs, createModelConfig, updateModelConfig, deleteModelConfig } from '@/api/model-configs';
+import type { SavedModelConfig } from '@/api/model-configs';

 interface SidebarProps {
  conversations: Conversation[];
@@ -44,13 +49,28 @@ export default function Sidebar({
  onToggle,
 }: SidebarProps) {
  const [showConfig, setShowConfig] = useState(false);
+  const [configMode, setConfigMode] = useState<'list' | 'edit'>('list');
  const [editingConfig, setEditingConfig] = useState<ModelConfig>(DEFAULT_MODEL_CONFIG);
+  const [editingConfigId, setEditingConfigId] = useState<string | null>(null);
  const [deleteConfirm, setDeleteConfirm] = useState<string | null>(null);
  const [pendingOpenConfig, setPendingOpenConfig] = useState(false);

+  // 从后端 API 加载已保存的配置列表
+  const [savedConfigs, setSavedConfigs] = useState<SavedModelConfig[]>([]);
+  const [loadingConfigs, setLoadingConfigs] = useState(false);
+
+  useEffect(() => {
+    if (!showConfig) return;
+    setLoadingConfigs(true);
+    listModelConfigs()
+      .then(setSavedConfigs)
+      .catch(err => console.error('Failed to load model configs:', err))
+      .finally(() => setLoadingConfigs(false));
+  }, [showConfig]);
+
  const handleEditConfig = () => {
    if (activeConversation) {
-      setEditingConfig({ ...activeConversation.modelConfig });
+      setConfigMode('list');
      setShowConfig(true);
    } else {
      onCreateConversation();
@@ -58,22 +78,65 @@ export default function Sidebar({
    }
  };

-  // Open config when a new conversation is created via the config button
+  // 通过配置按钮创建新会话后，自动打开配置面板
  useEffect(() => {
    if (pendingOpenConfig && activeConversation) {
-      setEditingConfig({ ...activeConversation.modelConfig });
+      setConfigMode('list');
      setShowConfig(true);
      setPendingOpenConfig(false);
    }
  }, [pendingOpenConfig, activeConversation]);

-  const handleSaveConfig = () => {
+  // 应用配置到当前会话
+  const handleApplyConfig = (config: ModelConfig) => {
    if (activeConversation) {
-      onUpdateModelConfig(activeConversation.id, editingConfig);
-      setShowConfig(false);
+      onUpdateModelConfig(activeConversation.id, config);
    }
  };

+  // 打开编辑表单
+  const handleOpenEdit = (saved: SavedModelConfig) => {
+    setEditingConfig({ ...saved.config });
+    setEditingConfigId(saved.id);
+    setConfigMode('edit');
+  };
+
+  // 打开新建表单
+  const handleOpenCreate = () => {
+    setEditingConfig({ ...DEFAULT_MODEL_CONFIG, name: '新配置' });
+    setEditingConfigId(null);
+    setConfigMode('edit');
+  };
+
+  // 保存配置（新建或编辑）
+  const handleSaveConfig = async () => {
+    try {
+      if (editingConfigId) {
+        await updateModelConfig(editingConfigId, editingConfig);
+      } else {
+        await createModelConfig(editingConfig);
+      }
+      // 刷新列表
+      const configs = await listModelConfigs();
+      setSavedConfigs(configs);
+      handleApplyConfig(editingConfig);
+      setConfigMode('list');
+    } catch (err) {
+      console.error('Save config failed:', err);
+    }
+  };
+
+  // 删除配置
+  const handleDeleteConfig = async (id: string) => {
+    try {
+      await deleteModelConfig(id);
+      setSavedConfigs(prev => prev.filter(c => c.id !== id));
+    } catch (err) {
+      console.error('Delete config failed:', err);
+    }
+  };
+
+  // 预设模型快速填充
  const handlePresetSelect = (preset: typeof PRESET_MODELS[0]) => {
    setEditingConfig(prev => ({
      ...prev,
@@ -94,7 +157,7 @@ export default function Sidebar({

  return (
    <>
-      {/* Mobile overlay */}
+      {/* 移动端遮罩层 */}
      {isOpen && (
        <div
          className="fixed inset-0 bg-black/20 z-40 md:hidden"
@@ -102,14 +165,14 @@ export default function Sidebar({
        />
      )}

-      {/* Sidebar */}
+      {/* 侧边栏 */}
      <aside
        className={`fixed md:relative z-50 h-full bg-white border-r border-[#e5e5e5] flex flex-col transition-all duration-300 ease-in-out ${
          isOpen ? 'w-[280px] translate-x-0' : 'w-0 -translate-x-full md:w-0 md:translate-x-0'
        } overflow-hidden`}
        style={{ minWidth: isOpen ? '280px' : '0' }}
      >
-        {/* Top bar */}
+        {/* 顶部操作栏 */}
        <div className="flex items-center justify-between p-3 border-b border-[#e5e5e5]">
          <button
            onClick={() => onCreateConversation()}
@@ -136,7 +199,7 @@ export default function Sidebar({
          </div>
        </div>

-        {/* Conversation list */}
+        {/* 会话列表 */}
        <div className="flex-1 overflow-y-auto py-2 px-2 custom-scrollbar">
          {conversations.length === 0 ? (
            <div className="flex flex-col items-center justify-center h-32 text-[#999]">
@@ -182,7 +245,7 @@ export default function Sidebar({
          )}
        </div>

-        {/* Bottom actions */}
+        {/* 底部操作区 */}
        <div className="p-3 border-t border-[#e5e5e5] space-y-1">
          {activeConversation && (
            <button
@@ -203,15 +266,23 @@ export default function Sidebar({
        </div>
      </aside>

-      {/* Model Config Panel (Slide-over) */}
+      {/* 模型配置面板（滑出式） */}
      {showConfig && (
        <div className="fixed inset-0 z-[60] flex">
          <div className="flex-1 bg-black/20" onClick={() => setShowConfig(false)} />
          <div className="w-[480px] bg-[#fafafa] border-l border-[#e0e0e0] h-full overflow-y-auto custom-scrollbar">
            <div className="flex items-center justify-between p-5 border-b border-[#e5e5e5]">
              <h3 className="text-sm font-medium text-[#333] flex items-center gap-2">
+                {configMode === 'edit' ? (
+                  <button
+                    onClick={() => setConfigMode('list')}
+                    className="flex items-center gap-1 text-[#888] hover:text-[#000] transition-colors"
+                  >
+                    <ChevronLeft className="w-4 h-4" />
+                  </button>
+                ) : null}
                <Settings className="w-4 h-4 text-[#16a34a]" />
-                模型配置
+                {configMode === 'list' ? '模型配置' : (editingConfigId ? '编辑配置' : '新建配置')}
              </h3>
              <button
                onClick={() => setShowConfig(false)}
@@ -221,152 +292,270 @@ export default function Sidebar({
              </button>
            </div>

-            <div className="p-5 space-y-6">
-              {/* Preset models */}
-              <div>
-                <label className="flex items-center gap-2 text-sm text-[#888] mb-3">
-                  <Sparkles className="w-4 h-4" />
-                  预设模型
-                </label>
-                <div className="space-y-1">
-                  {PRESET_MODELS.map(preset => (
-                    <button
-                      key={preset.label}
-                      onClick={() => handlePresetSelect(preset)}
-                      className={`w-full text-left px-4 py-3 text-sm rounded-lg transition-all ${
-                        editingConfig.model === preset.model && editingConfig.baseUrl === preset.baseUrl
-                          ? 'bg-[#16a34a]/10 text-[#16a34a] border border-[#16a34a]/30'
-                          : 'text-[#666] hover:bg-[#f0f0f0] border border-transparent'
-                      }`}
-                    >
-                      <div className="font-medium">{preset.label}</div>
-                    </button>
-                  ))}
+            {configMode === 'list' ? (
+              /* ===== 配置列表模式 ===== */
+              <div className="p-5">
+                {/* 新增配置按钮 */}
+                <button
+                  onClick={handleOpenCreate}
+                  className="w-full flex items-center justify-center gap-2 py-3 mb-5 border-2 border-dashed border-[#ddd] text-[#888] rounded-lg hover:border-[#16a34a] hover:text-[#16a34a] transition-all"
+                >
+                  <Plus className="w-4 h-4" />
+                  新建配置
+                </button>
+
+                {loadingConfigs ? (
+                  <div className="text-center text-sm text-[#999] py-8">加载中...</div>
+                ) : savedConfigs.length === 0 ? (
+                  <div className="text-center text-sm text-[#999] py-8">
+                    <Layers className="w-8 h-8 mx-auto mb-2 text-[#ccc]" />
+                    <p>暂无保存的配置</p>
+                    <p className="text-xs mt-1">点击上方「新建配置」创建</p>
+                  </div>
+                ) : (
+                  <div className="space-y-2">
+                    {savedConfigs.map(saved => {
+                      const isActive = activeConversation?.modelConfig.name === saved.config.name;
+                      return (
+                        <div
+                          key={saved.id}
+                          className={`group relative p-4 rounded-lg border transition-all ${
+                            isActive
+                              ? 'bg-[#16a34a]/5 border-[#16a34a]/30'
+                              : 'bg-white border-[#e5e5e5] hover:border-[#ccc]'
+                          }`}
+                        >
+                          <div className="flex items-start justify-between gap-3">
+                            <div className="flex-1 min-w-0">
+                              <div className="flex items-center gap-2">
+                                <span className="text-sm font-medium text-[#333] truncate">
+                                  {saved.config.name}
+                                </span>
+                                {isActive && (
+                                  <span className="text-[10px] px-1.5 py-0.5 bg-[#16a34a]/10 text-[#16a34a] rounded">当前使用</span>
+                                )}
+                              </div>
+                              <div className="mt-1 text-xs text-[#999] font-mono">
+                                {saved.config.model} · {saved.config.baseUrl?.replace(/^https?:\/\//, '').split('/')[0]}
+                              </div>
+                              <div className="mt-1 text-xs text-[#bbb]">
+                                temp: {saved.config.temperature} · max: {saved.config.maxTokens} tokens
+                              </div>
+                            </div>
+                            <div className="flex items-center gap-1 opacity-0 group-hover:opacity-100 transition-opacity">
+                              <button
+                                onClick={() => handleOpenEdit(saved)}
+                                className="p-1.5 text-[#888] hover:text-[#16a34a] rounded transition-colors"
+                                title="编辑"
+                              >
+                                <Pencil className="w-3.5 h-3.5" />
+                              </button>
+                              <button
+                                onClick={() => {
+                                  if (deleteConfirm === saved.id) {
+                                    handleDeleteConfig(saved.id);
+                                    setDeleteConfirm(null);
+                                  } else {
+                                    setDeleteConfirm(saved.id);
+                                    setTimeout(() => setDeleteConfirm(null), 3000);
+                                  }
+                                }}
+                                className={`p-1.5 rounded transition-colors ${
+                                  deleteConfirm === saved.id ? 'text-[#ef4444]' : 'text-[#888] hover:text-[#ef4444]'
+                                }`}
+                                title="删除"
+                              >
+                                <Trash2 className="w-3.5 h-3.5" />
+                              </button>
+                            </div>
+                          </div>
+                          {/* 应用按钮 */}
+                          {!isActive && (
+                            <button
+                              onClick={() => handleApplyConfig(saved.config)}
+                              className="mt-3 w-full py-1.5 text-xs text-[#16a34a] bg-[#16a34a]/5 border border-[#16a34a]/20 rounded hover:bg-[#16a34a]/10 transition-all"
+                            >
+                              应用此配置
+                            </button>
+                          )}
+                        </div>
+                      );
+                    })}
+                  </div>
+                )}
+
+                {/* 预设模型（快速新建） */}
+                <div className="mt-8 pt-5 border-t border-[#e5e5e5]">
+                  <label className="flex items-center gap-2 text-sm text-[#888] mb-3">
+                    <Sparkles className="w-3.5 h-3.5" />
+                    预设模型（快速新建）
+                  </label>
+                  <div className="grid grid-cols-2 gap-2">
+                    {PRESET_MODELS.map(preset => (
+                      <button
+                        key={preset.label}
+                        onClick={() => {
+                          setEditingConfig({ ...DEFAULT_MODEL_CONFIG, name: preset.label, baseUrl: preset.baseUrl, model: preset.model });
+                          setEditingConfigId(null);
+                          setConfigMode('edit');
+                        }}
+                        className="text-left px-3 py-2 text-xs text-[#666] bg-white border border-[#e5e5e5] rounded-lg hover:border-[#16a34a]/30 hover:text-[#16a34a] transition-all"
+                      >
+                        {preset.label}
+                      </button>
+                    ))}
+                  </div>
                </div>
              </div>
-
-              {/* Config name */}
-              <div>
-                <label className="flex items-center gap-2 text-sm text-[#888] mb-2">
-                  <FileText className="w-3 h-3" />
-                  配置名称
-                </label>
-                <input
-                  type="text"
-                  value={editingConfig.name}
-                  onChange={e => setEditingConfig(prev => ({ ...prev, name: e.target.value }))}
-                  className="w-full bg-[#f5f5f5] border border-[#ddd] rounded-lg px-4 py-3 text-sm text-[#333] outline-none focus:border-[#16a34a]/50 transition-colors"
-                  placeholder="给这个配置起个名字"
-                />
-              </div>
-
-              {/* Base URL */}
-              <div>
-                <label className="flex items-center gap-2 text-sm text-[#888] mb-2">
-                  <Globe className="w-3 h-3" />
-                  API 地址
-                </label>
-                <input
-                  type="text"
-                  value={editingConfig.baseUrl}
-                  onChange={e => setEditingConfig(prev => ({ ...prev, baseUrl: e.target.value }))}
-                  className="w-full bg-[#f5f5f5] border border-[#ddd] rounded-lg px-4 py-3 text-sm text-[#333] outline-none focus:border-[#16a34a]/50 transition-colors font-mono"
-                  placeholder="https://api.example.com"
-                />
-              </div>
-
-              {/* Model name */}
-              <div>
-                <label className="flex items-center gap-2 text-sm text-[#888] mb-2">
-                  <Hash className="w-3 h-3" />
-                  模型 ID
-                </label>
-                <input
-                  type="text"
-                  value={editingConfig.model}
-                  onChange={e => setEditingConfig(prev => ({ ...prev, model: e.target.value }))}
-                  className="w-full bg-[#f5f5f5] border border-[#ddd] rounded-lg px-4 py-3 text-sm text-[#333] outline-none focus:border-[#16a34a]/50 transition-colors font-mono"
-                  placeholder="gpt-4o"
-                />
-              </div>
-
-              {/* API Key */}
-              <div>
-                <label className="flex items-center gap-2 text-sm text-[#888] mb-2">
-                  <Key className="w-3 h-3" />
-                  API Key
-                </label>
-                <input
-                  type="password"
-                  value={editingConfig.apiKey}
-                  onChange={e => setEditingConfig(prev => ({ ...prev, apiKey: e.target.value }))}
-                  className="w-full bg-[#f5f5f5] border border-[#ddd] rounded-lg px-4 py-3 text-sm text-[#333] outline-none focus:border-[#16a34a]/50 transition-colors font-mono"
-                  placeholder="sk-..."
-                />
-              </div>
-
-              {/* Temperature */}
-              <div>
-                <label className="flex items-center gap-2 text-sm text-[#888] mb-2">
-                  <Thermometer className="w-4 h-4" />
-                  Temperature: {editingConfig.temperature}
-                </label>
-                <input
-                  type="range"
-                  min="0"
-                  max="2"
-                  step="0.1"
-                  value={editingConfig.temperature}
-                  onChange={e => setEditingConfig(prev => ({ ...prev, temperature: parseFloat(e.target.value) }))}
-                  className="w-full accent-[#16a34a]"
-                />
-                <div className="flex justify-between text-xs text-[#aaa] mt-2">
-                  <span>精确 (0)</span>
-                  <span>平衡 (1)</span>
-                  <span>创意 (2)</span>
+            ) : (
+              /* ===== 编辑/新建配置模式 ===== */
+              <div className="p-5 space-y-5">
+                {/* 预设模型快速填充 */}
+                <div>
+                  <label className="flex items-center gap-2 text-sm text-[#888] mb-2">
+                    <Sparkles className="w-3.5 h-3.5" />
+                    快速填充
+                  </label>
+                  <div className="flex flex-wrap gap-2">
+                    {PRESET_MODELS.map(preset => (
+                      <button
+                        key={preset.label}
+                        onClick={() => handlePresetSelect(preset)}
+                        className={`px-3 py-1.5 text-xs rounded-md border transition-all ${
+                          editingConfig.model === preset.model
+                            ? 'bg-[#16a34a]/10 text-[#16a34a] border-[#16a34a]/30'
+                            : 'bg-white text-[#666] border-[#e0e0e0] hover:border-[#ccc]'
+                        }`}
+                      >
+                        {preset.label}
+                      </button>
+                    ))}
+                  </div>
                </div>
-              </div>

-              {/* Max Tokens */}
-              <div>
-                <label className="flex items-center gap-2 text-sm text-[#888] mb-2">
-                  <Hash className="w-4 h-4" />
-                  最大 Token: {editingConfig.maxTokens}
-                </label>
-                <input
-                  type="range"
-                  min="256"
-                  max="8192"
-                  step="256"
-                  value={editingConfig.maxTokens}
-                  onChange={e => setEditingConfig(prev => ({ ...prev, maxTokens: parseInt(e.target.value) }))}
-                  className="w-full accent-[#16a34a]"
-                />
-              </div>
+                {/* 配置名称 */}
+                <div>
+                  <label className="flex items-center gap-2 text-sm text-[#888] mb-2">
+                    <FileText className="w-3 h-3" />
+                    配置名称
+                  </label>
+                  <input
+                    type="text"
+                    value={editingConfig.name}
+                    onChange={e => setEditingConfig(prev => ({ ...prev, name: e.target.value }))}
+                    className="w-full bg-white border border-[#ddd] rounded-lg px-4 py-2.5 text-sm text-[#333] outline-none focus:border-[#16a34a]/50 transition-colors"
+                    placeholder="给这个配置起个名字"
+                  />
+                </div>

-              {/* System Prompt */}
-              <div>
-                <label className="flex items-center gap-2 text-sm text-[#888] mb-2">
-                  <FileText className="w-3 h-3" />
-                  系统提示词
-                </label>
-                <textarea
-                  value={editingConfig.systemPrompt}
-                  onChange={e => setEditingConfig(prev => ({ ...prev, systemPrompt: e.target.value }))}
-                  className="w-full bg-[#f5f5f5] border border-[#ddd] rounded-lg px-4 py-3 text-sm text-[#333] outline-none focus:border-[#16a34a]/50 transition-colors font-mono resize-none h-24"
-                  placeholder="You are a helpful assistant."
-                />
-              </div>
+                {/* API 地址 */}
+                <div>
+                  <label className="flex items-center gap-2 text-sm text-[#888] mb-2">
+                    <Globe className="w-3 h-3" />
+                    API 地址
+                  </label>
+                  <input
+                    type="text"
+                    value={editingConfig.baseUrl}
+                    onChange={e => setEditingConfig(prev => ({ ...prev, baseUrl: e.target.value }))}
+                    className="w-full bg-white border border-[#ddd] rounded-lg px-4 py-2.5 text-sm text-[#333] outline-none focus:border-[#16a34a]/50 transition-colors font-mono"
+                    placeholder="https://api.example.com"
+                  />
+                </div>

-              {/* Save button */}
-              <button
-                onClick={handleSaveConfig}
-                className="w-full flex items-center justify-center gap-2 py-3 bg-[#16a34a]/10 text-[#16a34a] border border-[#16a34a]/30 rounded-lg text-base hover:bg-[#16a34a]/20 transition-all"
-              >
-                <Save className="w-5 h-5" />
-                保存配置
-              </button>
-            </div>
+                {/* 模型 ID */}
+                <div>
+                  <label className="flex items-center gap-2 text-sm text-[#888] mb-2">
+                    <Hash className="w-3 h-3" />
+                    模型 ID
+                  </label>
+                  <input
+                    type="text"
+                    value={editingConfig.model}
+                    onChange={e => setEditingConfig(prev => ({ ...prev, model: e.target.value }))}
+                    className="w-full bg-white border border-[#ddd] rounded-lg px-4 py-2.5 text-sm text-[#333] outline-none focus:border-[#16a34a]/50 transition-colors font-mono"
+                    placeholder="deepseek-v4-pro"
+                  />
+                </div>
+
+                {/* API Key */}
+                <div>
+                  <label className="flex items-center gap-2 text-sm text-[#888] mb-2">
+                    <Key className="w-3 h-3" />
+                    API Key
+                  </label>
+                  <input
+                    type="password"
+                    value={editingConfig.apiKey}
+                    onChange={e => setEditingConfig(prev => ({ ...prev, apiKey: e.target.value }))}
+                    className="w-full bg-white border border-[#ddd] rounded-lg px-4 py-2.5 text-sm text-[#333] outline-none focus:border-[#16a34a]/50 transition-colors font-mono"
+                    placeholder="sk-..."
+                  />
+                </div>
+
+                {/* 温度参数 */}
+                <div>
+                  <label className="flex items-center gap-2 text-sm text-[#888] mb-2">
+                    <Thermometer className="w-3.5 h-3.5" />
+                    Temperature: {editingConfig.temperature}
+                  </label>
+                  <input
+                    type="range"
+                    min="0"
+                    max="2"
+                    step="0.1"
+                    value={editingConfig.temperature}
+                    onChange={e => setEditingConfig(prev => ({ ...prev, temperature: parseFloat(e.target.value) }))}
+                    className="w-full accent-[#16a34a]"
+                  />
+                  <div className="flex justify-between text-xs text-[#aaa] mt-1">
+                    <span>精确 (0)</span>
+                    <span>平衡 (1)</span>
+                    <span>创意 (2)</span>
+                  </div>
+                </div>
+
+                {/* 最大 Token */}
+                <div>
+                  <label className="flex items-center gap-2 text-sm text-[#888] mb-2">
+                    <Hash className="w-3.5 h-3.5" />
+                    最大 Token: {editingConfig.maxTokens}
+                  </label>
+                  <input
+                    type="range"
+                    min="256"
+                    max="8192"
+                    step="256"
+                    value={editingConfig.maxTokens}
+                    onChange={e => setEditingConfig(prev => ({ ...prev, maxTokens: parseInt(e.target.value) }))}
+                    className="w-full accent-[#16a34a]"
+                  />
+                </div>
+
+                {/* 系统提示词 */}
+                <div>
+                  <label className="flex items-center gap-2 text-sm text-[#888] mb-2">
+                    <FileText className="w-3 h-3" />
+                    系统提示词
+                  </label>
+                  <textarea
+                    value={editingConfig.systemPrompt}
+                    onChange={e => setEditingConfig(prev => ({ ...prev, systemPrompt: e.target.value }))}
+                    className="w-full bg-white border border-[#ddd] rounded-lg px-4 py-3 text-sm text-[#333] outline-none focus:border-[#16a34a]/50 transition-colors font-mono resize-none h-28"
+                    placeholder="You are a helpful assistant."
+                  />
+                </div>
+
+                {/* 保存按钮 */}
+                <button
+                  onClick={handleSaveConfig}
+                  className="w-full flex items-center justify-center gap-2 py-3 bg-[#16a34a]/10 text-[#16a34a] border border-[#16a34a]/30 rounded-lg text-sm hover:bg-[#16a34a]/20 transition-all"
+                >
+                  <Save className="w-4 h-4" />
+                  {editingConfigId ? '保存修改' : '保存配置'}
+                </button>
+              </div>
+            )}
          </div>
        </div>
      )}
@@ -5,7 +5,9 @@ export function useAuth() {
  const [isAuthenticated, setIsAuthenticated] = useState<boolean>(() => {
    return !!localStorage.getItem('chat_token');
  });
-  const [isLoading, setIsLoading] = useState(true);
+  const [isLoading, setIsLoading] = useState(() => {
+    return !!localStorage.getItem('chat_token');  // 有 token 才需要 loading，没 token 直接显示登录页
+  });

  useEffect(() => {
    const token = localStorage.getItem('chat_token');
@@ -2,6 +2,7 @@ import { useState, useCallback, useEffect, useRef } from 'react';
 import type { Conversation, Message, ModelConfig } from '@/types';
 import {
  listConversations,
+  getConversation,
  createConversation as apiCreateConversation,
  updateConversation as apiUpdateConversation,
  deleteConversation as apiDeleteConversation,
@@ -21,6 +22,9 @@ function apiMsgToMessage(msg: ApiMessage): Message {
    id: msg.id,
    role: msg.role,
    content: msg.content,
+    thinking: msg.thinking || undefined,
+    promptTokens: msg.prompt_tokens || undefined,
+    completionTokens: msg.completion_tokens || undefined,
    timestamp: msg.timestamp,
  };
 }
@@ -40,41 +44,60 @@ export function useChat() {
  const [conversations, setConversations] = useState<Conversation[]>([]);
  const [activeId, setActiveId] = useState<string | null>(null);
  const [isStreaming, setIsStreaming] = useState(false);
-  const [isLoading, setIsLoading] = useState(true);
+  const [isLoading, setIsLoading] = useState(() => {
+    return !!localStorage.getItem('chat_token');  // 有 token 才需要 loading
+  });
  const abortRef = useRef<boolean>(false);

  const activeConversation = conversations.find(c => c.id === activeId) || null;

-  // 初始加载
-  useEffect(() => {
+  // 加载会话列表
+  const loadConversations = useCallback(async () => {
    const token = localStorage.getItem('chat_token');
    if (!token) {
+      setConversations([]);
+      setActiveId(null);
      setIsLoading(false);
      return;
    }
-    let mounted = true;
    setIsLoading(true);
-    listConversations()
-      .then((rows) => {
-        if (!mounted) return;
-        const convs = rows.map(apiConvToConversation);
-        setConversations(convs);
-        if (convs.length > 0 && !activeId) {
-          setActiveId(convs[0].id);
-        }
-      })
-      .catch((err) => {
-        console.error('Failed to load conversations:', err);
-      })
-      .finally(() => {
-        if (mounted) setIsLoading(false);
-      });
-    return () => { mounted = false; };
+    try {
+      const rows = await listConversations();
+      const convs = rows.map(apiConvToConversation);
+      setConversations(convs);
+      if (convs.length > 0 && !activeId) {
+        setActiveId(convs[0].id);
+      }
+    } catch (err) {
+      console.error('Failed to load conversations:', err);
+    } finally {
+      setIsLoading(false);
+    }
+  }, [activeId]);
+
+  // 初始加载
+  useEffect(() => {
+    loadConversations();
  }, []);

-  const setActive = useCallback((id: string | null) => {
+  const setActive = useCallback(async (id: string | null) => {
    setActiveId(id);
-  }, []);
+    // 如果切换到的会话没有消息，重新获取完整数据
+    if (id) {
+      const conv = conversations.find(c => c.id === id);
+      if (conv && conv.messages.length === 0) {
+        try {
+          const fullConv = await getConversation(id);
+          if (!fullConv.messages) return;
+          setConversations(prev =>
+            prev.map(c => (c.id === id ? apiConvToConversation(fullConv) : c))
+          );
+        } catch (err) {
+          console.error('Load conversation failed:', err);
+        }
+      }
+    }
+  }, [conversations]);

  const createConversation = useCallback(async (config?: ModelConfig) => {
    // 如果当前已经在空对话中，不再创建新的
@@ -130,41 +153,78 @@ export function useChat() {
    }
  }, []);

-  const sendMessage = useCallback(async (content: string) => {
+  const sendMessage = useCallback(async (content: string, regenerateFrom?: string) => {
    if (!activeConversation) return;
    const convId = activeConversation.id;

-    // 乐观更新：先添加用户消息到本地状态
-    const userMessage: Message = {
-      id: generateId(),
-      role: 'user',
-      content,
-      timestamp: Date.now(),
-    };
-    setConversations(prev =>
-      prev.map(c => {
-        if (c.id === convId) {
-          const newMessages = [...c.messages, userMessage];
-          const newTitle = c.messages.length === 0
-            ? content.slice(0, 20) + (content.length > 20 ? '...' : '')
-            : c.title;
-          return { ...c, messages: newMessages, title: newTitle, updatedAt: Date.now() };
-        }
-        return c;
-      })
-    );
+    let userMessage: Message | null = null;
+    let assistantMessageId = generateId();
+    let fullContent = '';
+    let fullThinking = '';
+    let promptTokens = 0;
+    let completionTokens = 0;
+
+    if (regenerateFrom) {
+      // 重新生成：找到目标用户消息，删除其后所有消息
+      const targetMsg = activeConversation.messages.find(m => m.id === regenerateFrom && m.role === 'user');
+      if (!targetMsg) return;
+      userMessage = targetMsg;
+      content = targetMsg.content;
+      setConversations(prev =>
+        prev.map(c => {
+          if (c.id !== convId) return c;
+          const idx = c.messages.findIndex(m => m.id === regenerateFrom);
+          if (idx === -1) return c;
+          return { ...c, messages: c.messages.slice(0, idx + 1) };
+        })
+      );
+    } else {
+      // 正常发送：先添加用户消息到本地状态（乐观更新）
+      userMessage = {
+        id: generateId(),
+        role: 'user',
+        content,
+        timestamp: Date.now(),
+      };
+      setConversations(prev =>
+        prev.map(c => {
+          if (c.id === convId) {
+            const newMessages = [...c.messages, userMessage!];
+            const newTitle = c.messages.length === 0
+              ? content.slice(0, 20) + (content.length > 20 ? '...' : '')
+              : c.title;
+            return { ...c, messages: newMessages, title: newTitle, updatedAt: Date.now() };
+          }
+          return c;
+        })
+      );
+    }

    setIsStreaming(true);
    abortRef.current = false;

-    const assistantMessageId = generateId();
-    let fullContent = '';
-
    try {
-      for await (const event of sendMessageStream(convId, content)) {
+      for await (const event of sendMessageStream(convId, content, regenerateFrom)) {
        if (abortRef.current) break;

-        if (event.type === 'delta' && event.content) {
+        if (event.type === 'thinking' && event.content) {
+          fullThinking += event.content;
+          setConversations(prev =>
+            prev.map(c => {
+              if (c.id !== convId) return c;
+              const lastMsg = c.messages[c.messages.length - 1];
+              if (lastMsg && lastMsg.role === 'assistant' && lastMsg.id === assistantMessageId) {
+                const newMessages = c.messages.slice(0, -1);
+                newMessages.push({ ...lastMsg, thinking: fullThinking });
+                return { ...c, messages: newMessages };
+              }
+              return {
+                ...c,
+                messages: [...c.messages, { id: assistantMessageId, role: 'assistant', content: '', thinking: fullThinking, timestamp: Date.now() }],
+              };
+            })
+          );
+        } else if (event.type === 'delta' && event.content) {
          fullContent += event.content;
          setConversations(prev =>
            prev.map(c => {
@@ -172,17 +232,39 @@ export function useChat() {
              const lastMsg = c.messages[c.messages.length - 1];
              if (lastMsg && lastMsg.role === 'assistant' && lastMsg.id === assistantMessageId) {
                const newMessages = c.messages.slice(0, -1);
-                newMessages.push({ ...lastMsg, content: fullContent });
+                newMessages.push({ ...lastMsg, content: fullContent, thinking: fullThinking || undefined });
                return { ...c, messages: newMessages };
              }
              return {
                ...c,
-                messages: [...c.messages, { id: assistantMessageId, role: 'assistant', content: fullContent, timestamp: Date.now() }],
+                messages: [...c.messages, { id: assistantMessageId, role: 'assistant', content: fullContent, thinking: fullThinking || undefined, timestamp: Date.now() }],
              };
            })
          );
        } else if (event.type === 'done') {
          fullContent = event.content || fullContent;
+          fullThinking = event.thinking || fullThinking;
+          promptTokens = event.promptTokens || 0;
+          completionTokens = event.completionTokens || 0;
+          // 最终更新：写入 token 用量
+          setConversations(prev =>
+            prev.map(c => {
+              if (c.id !== convId) return c;
+              const lastMsg = c.messages[c.messages.length - 1];
+              if (lastMsg && lastMsg.role === 'assistant' && lastMsg.id === assistantMessageId) {
+                const newMessages = c.messages.slice(0, -1);
+                newMessages.push({
+                  ...lastMsg,
+                  content: fullContent,
+                  thinking: fullThinking || undefined,
+                  promptTokens,
+                  completionTokens,
+                });
+                return { ...c, messages: newMessages };
+              }
+              return c;
+            })
+          );
        } else if (event.type === 'error') {
          console.error('Stream error:', event.content);
        }
@@ -215,6 +297,10 @@ export function useChat() {
    setIsStreaming(false);
  }, []);

+  const regenerateMessage = useCallback((messageId: string) => {
+    sendMessage('', messageId);
+  }, [sendMessage]);
+
  return {
    conversations,
    activeConversation,
@@ -226,6 +312,8 @@ export function useChat() {
    updateModelConfig,
    clearMessages,
    sendMessage,
+    regenerateMessage,
    stopStreaming,
+    reloadConversations: loadConversations,
  };
 }
@@ -2,6 +2,9 @@ export interface Message {
  id: string;
  role: 'user' | 'assistant' | 'system';
  content: string;
+  thinking?: string;          // 思考过程（DeepSeek V4 reasoning_content）
+  promptTokens?: number;      // 输入 token 数
+  completionTokens?: number;  // 输出 token 数
  timestamp: number;
 }

@@ -28,14 +31,15 @@ export const DEFAULT_MODEL_CONFIG: ModelConfig = {
  name: '默认配置',
  apiKey: '',
  baseUrl: 'https://api.deepseek.com',
-  model: 'deepseek-chat',
-  temperature: 0.7,
-  maxTokens: 4096,
-  systemPrompt: 'You are a helpful assistant.',
+  model: 'deepseek-v4-pro',
+  temperature: 0.2,
+  maxTokens: 8192,
+  systemPrompt: '你是一位资深全栈架构师。回答技术问题时，请：\n1. 先给出核心结论，再展开解释。\n2. 所有代码必须用 Markdown 代码块包裹，并标注语言。\n3. 如果需要对比方案，使用列表形式说明优缺点。\n4. 不要输出无关的表情、客套话，保持简洁专业。',
 };

 export const PRESET_MODELS = [
-  { label: 'DeepSeek', baseUrl: 'https://api.deepseek.com', model: 'deepseek-chat' },
+  { label: 'DeepSeek V4 Pro', baseUrl: 'https://api.deepseek.com', model: 'deepseek-v4-pro' },
+  { label: 'DeepSeek V4 Flash', baseUrl: 'https://api.deepseek.com', model: 'deepseek-v4-flash' },
  { label: 'Kimi', baseUrl: 'https://api.moonshot.cn/v1', model: 'moonshot-v1-8k' },
  { label: '自定义', baseUrl: '', model: '' },
 ];