feat: add JWT authentication and AGENTS.md

WebUI/src/views/LoginView.vue

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+<script setup lang="ts">
+import { ref, shallowRef } from 'vue'
+import { useRouter, useRoute } from 'vue-router'
+import { Lock } from '@element-plus/icons-vue'
+import { useAuthStore } from '@/stores/useAuthStore'
+import { useUserSettingsStore } from '@/stores/useUserSettingsStore'
+
+const router = useRouter()
+const route = useRoute()
+const authStore = useAuthStore()
+const userSettingsStore = useUserSettingsStore()
+
+const password = ref('')
+const loading = ref(false)
+const error = ref('')
+
+const redirect = (route.query.redirect as string) || '/'
+
+async function handleLogin() {
+  if (!password.value) return
+  loading.value = true
+  error.value = ''
+  try {
+    const ok = await authStore.login(password.value)
+    if (ok) {
+      await userSettingsStore.fetchAndSync()
+      router.replace(redirect)
+    } else {
+      error.value = authStore.error || '密码错误'
+    }
+  } finally {
+    loading.value = false
+  }
+}
+</script>
+
+<template>
+  <div class="login-wrapper">
+    <div class="decoration-star" style="top: 10%; right: 15%; animation-delay: 0s;"></div>
+    <div class="decoration-star" style="top: 70%; left: 10%; animation-delay: 1s;"></div>
+    <div class="decoration-star" style="top: 30%; left: 20%; animation-delay: 2s;"></div>
+
+    <div class="login-card">
+      <div class="login-header">
+        <div class="logo-icon">✿</div>
+        <h1 class="site-name">{{ userSettingsStore.siteName }}</h1>
+        <p class="subtitle">需要密码才能进入哦~</p>
+      </div>
+
+      <el-form @submit.prevent="handleLogin" class="login-form">
+        <el-input
+          v-model="password"
+          type="password"
+          placeholder="请输入密码"
+          size="large"
+          show-password
+          :prefix-icon="Lock"
+          @keyup.enter="handleLogin"
+        />
+        <p v-if="error" class="error-msg">{{ error }}</p>
+        <el-button
+          type="primary"
+          size="large"
+          :loading="loading"
+          class="login-btn"
+          @click="handleLogin"
+        >
+          进入
+        </el-button>
+      </el-form>
+    </div>
+  </div>
+</template>
+
+<style scoped lang="scss">
+.login-wrapper {
+  min-height: 100vh;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  background: linear-gradient(135deg, #fce4ec 0%, #f8bbd0 30%, #f48fb1 60%, #fce4ec 100%);
+  position: relative;
+  overflow: hidden;
+}
+
+.login-card {
+  background: rgba(255, 255, 255, 0.85);
+  backdrop-filter: blur(16px);
+  border-radius: 24px;
+  padding: 48px 40px;
+  width: 400px;
+  max-width: 90vw;
+  box-shadow: 0 8px 32px rgba(255, 183, 197, 0.3);
+  z-index: 1;
+}
+
+.login-header {
+  text-align: center;
+  margin-bottom: 32px;
+
+  .logo-icon {
+    font-size: 48px;
+    color: var(--primary);
+    animation: twinkle 2s ease-in-out infinite;
+    margin-bottom: 12px;
+  }
+
+  .site-name {
+    font-size: 24px;
+    font-weight: 700;
+    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
+    -webkit-background-clip: text;
+    -webkit-text-fill-color: transparent;
+    background-clip: text;
+    margin: 0 0 8px;
+  }
+
+  .subtitle {
+    font-size: 14px;
+    color: var(--text-secondary);
+    margin: 0;
+  }
+}
+
+.login-form {
+  display: flex;
+  flex-direction: column;
+  gap: 16px;
+}
+
+.error-msg {
+  color: #f56c6c;
+  font-size: 13px;
+  margin: 0;
+  text-align: center;
+}
+
+.login-btn {
+  width: 100%;
+  height: 44px;
+  font-size: 16px;
+  font-weight: 600;
+  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
+  border: none;
+  border-radius: 12px;
+
+  &:hover {
+    transform: translateY(-1px);
+    box-shadow: 0 4px 16px rgba(255, 183, 197, 0.5);
+  }
+}
+
+@keyframes twinkle {
+  0%, 100% { opacity: 1; transform: scale(1); }
+  50% { opacity: 0.7; transform: scale(1.05); }
+}
+</style>