优化登录功能，修改用户名和密码的默认值，增加密码的编码存储和解码恢复逻辑，提升安全性和用户体验

src/views/Login.vue

@@ -63,8 +63,8 @@ const checkMobile = () => {
 }
 
 const form = ref({
-  username: 'admin',
+  username: '',
-  password: 'admin1',
+  password: '',
 })
 
 const rules = {
@@ -80,9 +80,19 @@ const rules = {
 onMounted(() => {
   const saved = localStorage.getItem('login-remember')
   const savedUser = localStorage.getItem('login-username')
+  const savedPassword = localStorage.getItem('login-password')
   remember.value = saved === '1'
   if (remember.value && savedUser) {
     form.value.username = savedUser
+    // 恢复密码（解码）
+    if (savedPassword) {
+      try {
+        form.value.password = atob(savedPassword)
+      } catch (e) {
+        // 如果解码失败，清除存储的密码
+        localStorage.removeItem('login-password')
+      }
+    }
   }
   
   // 检测移动端
@@ -102,8 +112,13 @@ function persistRemember() {
   localStorage.setItem('login-remember', remember.value ? '1' : '0')
   if (remember.value) {
     localStorage.setItem('login-username', form.value.username || '')
+    // 保存密码（编码处理）
+    if (form.value.password) {
+      localStorage.setItem('login-password', btoa(form.value.password))
+    }
   } else {
     localStorage.removeItem('login-username')
+    localStorage.removeItem('login-password')
   }
 }