feat(ai): 添加 AI 助手功能支持多模型对话

- 集成 OpenAI 兼容网关和 Ollama 原生 API 接口
- 新增 AI 测试页面支持流式对话和模型切换
- 配置开发环境同源反向代理解决浏览器 CORS 问题
- 添加环境变量配置支持 AI API 和 Ollama 接口设置
- 实现聊天历史记录、中断请求和参数调节功能
- 提供 Nginx 反向代理配置文档用于生产环境部署

vite.config.ts

@@ -1,4 +1,4 @@
-import { defineConfig } from 'vite';
+import { defineConfig, loadEnv } from 'vite';
 import vue from '@vitejs/plugin-vue';
 import ViteCompression from 'vite-plugin-compression';
 import ViteComponents from 'unplugin-vue-components/vite';
@@ -44,7 +44,9 @@ function getSmartPort() {
   }
 }
 
-export default defineConfig(({ command }) => {
+export default defineConfig(({ command, mode }) => {
+  // Load env for Vite config usage (including non-VITE_ keys like AI_API_KEY).
+  const env = loadEnv(mode, process.cwd(), '');
   const isBuild = command === 'build';
 
   // 智能端口配置（仅在开发模式下）
@@ -68,7 +70,7 @@ export default defineConfig(({ command }) => {
       // 代理配置
       proxy: {
         '/api': {
-          target: process.env.VITE_API_URL || 'https://server.websoft.top',
+          target: env.VITE_API_URL || process.env.VITE_API_URL || 'https://server.websoft.top',
           changeOrigin: true,
           secure: false,
           configure: (proxy, _options) => {
@@ -82,6 +84,39 @@ export default defineConfig(({ command }) => {
               console.log('Received Response from the Target:', proxyRes.statusCode, req.url);
             });
           },
+        },
+        // OpenAI-compatible gateway reverse proxy (dev only).
+        // Example:
+        //   GET  /ai-proxy/models          -> https://ai.websoft.top/api/v1/models
+        //   POST /ai-proxy/chat/completions -> https://ai.websoft.top/api/v1/chat/completions
+        '/ai-proxy': {
+          target: env.AI_PROXY_TARGET || 'https://ai-api.websoft.top',
+          changeOrigin: true,
+          secure: false,
+          rewrite: (path) =>
+            path.replace(/^\/ai-proxy/, env.AI_PROXY_REWRITE_PREFIX || '/api/v1'),
+          configure: (proxy) => {
+            proxy.on('proxyReq', (proxyReq) => {
+              // Inject auth for local dev to avoid putting API keys in the browser.
+              const key = env.AI_API_KEY || process.env.AI_API_KEY;
+              if (key && !proxyReq.getHeader('Authorization')) {
+                const trimmed = String(key).trim();
+                const value = /^bearer\\s+/i.test(trimmed)
+                  ? trimmed
+                  : `Bearer ${trimmed}`;
+                proxyReq.setHeader('Authorization', value);
+              }
+            });
+          }
+        },
+        // Ollama native API reverse proxy (dev only).
+        //   GET  /ollama-proxy/api/tags -> http://47.119.165.234:11434/api/tags
+        //   POST /ollama-proxy/api/chat -> http://47.119.165.234:11434/api/chat
+        '/ollama-proxy': {
+          target: 'http://47.119.165.234:11434',
+          changeOrigin: true,
+          secure: false,
+          rewrite: (path) => path.replace(/^\/ollama-proxy/, '')
         }
       },
       // 端口冲突时的处理