fix(config): 更新AI代理配置为本地Ollama服务

- 将AI代理目标从远程服务器改为本地127.0.1:11434
- 更新Nginx配置中的代理地址和Host头部设置
- 修改AI_API_URL默认值指向本地Ollama服务
- 调整AI视图组件中的基础URL配置逻辑
- 更新环境变量示例文件中的默认API地址
- 修正Vite开发服务器代理配置指向本地服务

vite.config.ts

@@ -101,7 +101,7 @@ export default defineConfig(({ command, mode }) => {
         //   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',
+          target: env.AI_PROXY_TARGET || 'http://127.0.0.1:11434',
           changeOrigin: true,
           secure: false,
           rewrite: (path) =>
@@ -124,10 +124,10 @@ export default defineConfig(({ command, mode }) => {
           }
         },
         // Ollama native API reverse proxy (dev only).
-        //   GET  /proxy/api/tags -> http://47.119.165.234:11434/api/tags
-        //   POST /proxy/api/chat -> http://47.119.165.234:11434/api/chat
+        //   GET  /proxy/api/tags -> http://127.0.0.1:11434/api/tags
+        //   POST /proxy/api/chat -> http://127.0.0.1:11434/api/chat
         '/proxy': {
-          target: 'http://47.119.165.234:11434',
+          target: 'http://127.0.0.1:11434',
           changeOrigin: true,
           secure: false,
           rewrite: (path) => path.replace(/^\/proxy/, '')