feat: 新增登录页面插图资源和组件

packages/effects/layouts/src/authentication/icons/login-illustration.vue

@@ -0,0 +1,53 @@
+<script setup lang="ts">
+defineOptions({
+  name: 'LoginIllustration',
+});
+
+defineProps<{
+  alt?: string;
+}>();
+</script>
+
+<template>
+  <div class="login-illustration-container">
+    <img
+      src="/login-illustration.svg"
+      :alt="alt || 'Login Illustration'"
+      class="animate-float w-full opacity-40"
+      style="max-width: none; height: auto;"
+    />
+  </div>
+</template>
+
+<style scoped>
+.login-illustration-container {
+  width: 100%;
+  height: 100%;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  overflow: visible;
+}
+
+.login-illustration-container img {
+  min-width: 100%;
+  max-height: 100%;
+  object-fit: contain;
+  transform: scale(1.2);
+}
+
+/* 覆盖 Tailwind 的 animate-float，使用更快速流畅的动画 */
+.login-illustration-container img.animate-float {
+  animation: float-smooth 3s ease-in-out 0ms infinite;
+}
+
+@keyframes float-smooth {
+  0%, 100% {
+    transform: scale(1.2) translateY(0);
+  }
+  50% {
+    transform: scale(1.2) translateY(-15px);
+  }
+}
+</style>
+