feat: 添加环境变量示例，更新样式和依赖，增强全局状态管理

nuxt.config.ts

@@ -4,9 +4,15 @@ import tailwindcss from "@tailwindcss/vite";
 export default defineNuxtConfig({
   compatibilityDate: "2024-11-01",
   devtools: { enabled: true },
-  modules: ["@nuxt/ui"],
+  modules: ["@nuxt/ui", "@pinia/nuxt"],
   css: ["~/assets/css/main.css"],
+  runtimeConfig: {
+    public: {
+      DifyBaseURL: process.env.DIFY_BASE_URL,
+      DifyApiKey: process.env.DIFY_API_KEY,
+    },
+  },
   vite: {
     plugins: [tailwindcss()],
   },
-});
+});