feat: fix compose.yml ;add frontend .env properties

frontend/src/components/AppHeader.vue

@@ -1,10 +1,14 @@
+<script setup>
+const giteaUrl = import.meta.env.VITE_GITEA_URL;
+</script>
+
 <template>
   <header class="app-header">
     <router-link to="/" class="logo-link">
       <div class="logo">Email Unlimit</div>
     </router-link>
     <nav class="nav-links">
-      <a href="https://gitea.shenjianl.cn/shenjianZ/email-unlimit" target="_blank">Gitee</a>
+      <a :href="giteaUrl" target="_blank">Gitea</a>
       <router-link to="/settings" class="settings-link" title="设置">
         <img src="@/assets/setting.svg" alt="Settings" class="settings-icon" />
       </router-link>