feat: add announcement feature with admin management and home page display

backend/internal/api/handlers/announcement.go

@@ -0,0 +1,123 @@
+package handlers
+
+import (
+	"net/http"
+	"strconv"
+
+	"sale/internal/models"
+	"sale/internal/utils"
+
+	"github.com/gin-gonic/gin"
+)
+
+type AnnouncementHandler struct{}
+
+func NewAnnouncementHandler() *AnnouncementHandler {
+	return &AnnouncementHandler{}
+}
+
+// List 用户端接口 - 只返回激活的公告
+func (h *AnnouncementHandler) List(c *gin.Context) {
+	var announcements []models.Announcement
+	utils.DB.Where("is_active = ?", true).
+		Order("sort_order ASC, created_at DESC").
+		Find(&announcements)
+	c.JSON(http.StatusOK, gin.H{"data": announcements})
+}
+
+// AdminList 管理端接口 - 返回所有公告
+func (h *AnnouncementHandler) AdminList(c *gin.Context) {
+	var announcements []models.Announcement
+	utils.DB.Order("sort_order ASC, created_at DESC").Find(&announcements)
+	c.JSON(http.StatusOK, gin.H{"data": announcements})
+}
+
+// Create 创建公告
+func (h *AnnouncementHandler) Create(c *gin.Context) {
+	var req struct {
+		Title     string `json:"title" binding:"required"`
+		Content   string `json:"content"`
+		SortOrder int    `json:"sort_order"`
+		IsActive  bool   `json:"is_active"`
+	}
+	if err := c.ShouldBindJSON(&req); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "标题不能为空"})
+		return
+	}
+
+	announcement := models.Announcement{
+		Title:     req.Title,
+		Content:   req.Content,
+		SortOrder: req.SortOrder,
+		IsActive:  req.IsActive,
+	}
+	utils.DB.Create(&announcement)
+	c.JSON(http.StatusCreated, gin.H{"data": announcement})
+}
+
+// Update 更新公告
+func (h *AnnouncementHandler) Update(c *gin.Context) {
+	id, err := strconv.Atoi(c.Param("id"))
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "无效的ID"})
+		return
+	}
+
+	var announcement models.Announcement
+	if err := utils.DB.First(&announcement, id).Error; err != nil {
+		c.JSON(http.StatusNotFound, gin.H{"error": "公告不存在"})
+		return
+	}
+
+	var req struct {
+		Title     string `json:"title"`
+		Content   string `json:"content"`
+		SortOrder int    `json:"sort_order"`
+		IsActive  bool   `json:"is_active"`
+	}
+	if err := c.ShouldBindJSON(&req); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "参数错误"})
+		return
+	}
+
+	announcement.Title = req.Title
+	announcement.Content = req.Content
+	announcement.SortOrder = req.SortOrder
+	announcement.IsActive = req.IsActive
+	utils.DB.Save(&announcement)
+	c.JSON(http.StatusOK, gin.H{"data": announcement})
+}
+
+// Delete 删除公告
+func (h *AnnouncementHandler) Delete(c *gin.Context) {
+	id, err := strconv.Atoi(c.Param("id"))
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "无效的ID"})
+		return
+	}
+
+	if err := utils.DB.Delete(&models.Announcement{}, id).Error; err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "删除失败"})
+		return
+	}
+	c.JSON(http.StatusOK, gin.H{"message": "删除成功"})
+}
+
+// ToggleActive 切换激活状态
+func (h *AnnouncementHandler) ToggleActive(c *gin.Context) {
+	id, err := strconv.Atoi(c.Param("id"))
+	if err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "无效的ID"})
+		return
+	}
+
+	var announcement models.Announcement
+	if err := utils.DB.First(&announcement, id).Error; err != nil {
+		c.JSON(http.StatusNotFound, gin.H{"error": "公告不存在"})
+		return
+	}
+
+	announcement.IsActive = !announcement.IsActive
+	utils.DB.Save(&announcement)
+	c.JSON(http.StatusOK, gin.H{"data": announcement})
+}

backend/internal/api/routes/routes.go

@@ -28,6 +28,7 @@ func SetupRoutes(r *gin.Engine) {
 	logHandler := handlers.NewLogHandler()
 	purchaseGroupHandler := handlers.NewPurchaseGroupHandler()
 	shippingTemplateHandler := handlers.NewShippingTemplateHandler()
+	announcementHandler := handlers.NewAnnouncementHandler()
 
 	r.Use(middlewares.CORSMiddleware())
 
@@ -62,6 +63,7 @@ func SetupRoutes(r *gin.Engine) {
 		}
 
 		api.GET("/banners", bannerHandler.List)
+		api.GET("/announcements", announcementHandler.List)
 
 		api.GET("/categories", categoryHandler.List)
 		api.GET("/brands", brandHandler.List)
@@ -262,6 +264,15 @@ func SetupRoutes(r *gin.Engine) {
 					adminShippingTemplates.PUT("/:id", shippingTemplateHandler.Update)
 					adminShippingTemplates.DELETE("/:id", shippingTemplateHandler.Delete)
 				}
+
+				adminAnnouncements := admin.Group("/announcements")
+				{
+					adminAnnouncements.GET("", announcementHandler.AdminList)
+					adminAnnouncements.POST("", announcementHandler.Create)
+					adminAnnouncements.PUT("/:id", announcementHandler.Update)
+					adminAnnouncements.DELETE("/:id", announcementHandler.Delete)
+					adminAnnouncements.PUT("/:id/toggle", announcementHandler.ToggleActive)
+				}
 			}
 		}
 	}

backend/internal/models/announcement.go

@@ -0,0 +1,22 @@
+package models
+
+import (
+	"time"
+
+	"gorm.io/gorm"
+)
+
+type Announcement struct {
+	ID        uint           `gorm:"primaryKey" json:"id"`
+	Title     string         `gorm:"size:255;not null" json:"title"`
+	Content   string         `gorm:"type:text" json:"content"`
+	SortOrder int            `gorm:"default:0" json:"sort_order"`
+	IsActive  bool           `gorm:"default:true" json:"is_active"`
+	CreatedAt time.Time      `json:"created_at"`
+	UpdatedAt time.Time      `json:"updated_at"`
+	DeletedAt gorm.DeletedAt `gorm:"index" json:"-"`
+}
+
+func (Announcement) TableName() string {
+	return "announcements"
+}

backend/internal/utils/database.go

@@ -82,6 +82,7 @@ func AutoMigrate() {
 		&models.Article{},
 		&models.Banner{},
 		&models.PaymentChannel{},
+		&models.Announcement{},
 	)
 	if err != nil {
 		log.Fatalf("Failed to migrate database: %v", err)

frontend/src/api/index.ts

@@ -91,6 +91,10 @@ export const bannerApi = {
   list: () => api.get('/banners'),
 }
 
+export const announcementApi = {
+  list: () => api.get('/announcements'),
+}
+
 export const lotteryApi = {
   list: () => api.get('/lotteries'),
   getById: (id: number) => api.get(`/lotteries/${id}`),
@@ -201,4 +205,11 @@ export const adminApi = {
   createShippingTemplate: (data: any) => api.post('/admin/shipping-templates', data),
   updateShippingTemplate: (id: number, data: any) => api.put(`/admin/shipping-templates/${id}`, data),
   deleteShippingTemplate: (id: number) => api.delete(`/admin/shipping-templates/${id}`),
+
+  // 公告
+  getAnnouncements: () => api.get('/admin/announcements'),
+  createAnnouncement: (data: any) => api.post('/admin/announcements', data),
+  updateAnnouncement: (id: number, data: any) => api.put(`/admin/announcements/${id}`, data),
+  deleteAnnouncement: (id: number) => api.delete(`/admin/announcements/${id}`),
+  toggleAnnouncement: (id: number) => api.put(`/admin/announcements/${id}/toggle`),
 }

frontend/src/layouts/AdminLayout.vue

@@ -57,6 +57,10 @@
           <el-icon><Picture /></el-icon>
           <span class="nav-text">{{ $t('admin.bannerManagement') }}</span>
         </router-link>
+        <router-link to="/admin/announcements" class="nav-link">
+          <el-icon><Bell /></el-icon>
+          <span class="nav-text">公告管理</span>
+        </router-link>
         <router-link to="/admin/payment" class="nav-link">
           <el-icon><Wallet /></el-icon>
           <span class="nav-text">{{ $t('admin.paymentManagement') }}</span>
@@ -169,7 +173,7 @@ import { ref, computed } from 'vue'
 import { useRouter, useRoute } from 'vue-router'
 import { useI18n } from 'vue-i18n'
 import logoImg from '../assets/logo.png'
-import { DataAnalysis, User, Folder, Grid, Stamp, Goods, List, Van, Trophy, ChatDotSquare, Setting, Document, Picture, Compass, Fold, Expand, HomeFilled, FullScreen, ArrowDown, SwitchButton, ArrowRight, Wallet, Notebook, Box } from '@element-plus/icons-vue'
+import { DataAnalysis, User, Folder, Grid, Stamp, Goods, List, Van, Trophy, ChatDotSquare, Setting, Document, Picture, Compass, Fold, Expand, HomeFilled, FullScreen, ArrowDown, SwitchButton, ArrowRight, Wallet, Notebook, Box, Bell } from '@element-plus/icons-vue'
 import { useUserStore } from '../store/user'
 import { useCartStore } from '../store/cart'
 

frontend/src/router/index.ts

@@ -51,6 +51,7 @@ const routes = [
       { path: 'settings', name: 'AdminSettings', component: () => import('../views/admin/Settings.vue') },
       { path: 'articles', name: 'AdminArticles', component: () => import('../views/admin/Articles.vue') },
       { path: 'banners', name: 'AdminBanners', component: () => import('../views/admin/Banners.vue') },
+      { path: 'announcements', name: 'AdminAnnouncements', component: () => import('../views/admin/Announcements.vue') },
       { path: 'payment', name: 'AdminPayment', component: () => import('../views/admin/PaymentChannels.vue') },
       { path: 'logs', name: 'AdminLogs', component: () => import('../views/admin/Logs.vue') },
       { path: 'shipping-templates', name: 'AdminShippingTemplates', component: () => import('../views/admin/ShippingTemplates.vue') },

frontend/src/views/admin/Announcements.vue

@@ -0,0 +1,184 @@
+<template>
+  <div class="announcements-page">
+    <div class="page-header">
+      <h2>公告管理</h2>
+      <el-button type="primary" @click="showAdd = true">添加公告</el-button>
+    </div>
+
+    <div class="table-card">
+      <el-table :data="announcements" v-loading="loading">
+        <el-table-column prop="id" label="ID" width="80" />
+        <el-table-column prop="title" label="标题" />
+        <el-table-column prop="content" label="内容" show-overflow-tooltip />
+        <el-table-column prop="sort_order" label="排序" width="80" />
+        <el-table-column label="状态" width="100">
+          <template #default="{ row }">
+            <el-tag :type="row.is_active ? 'success' : 'info'">
+              {{ row.is_active ? '已启用' : '已禁用' }}
+            </el-tag>
+          </template>
+        </el-table-column>
+        <el-table-column prop="created_at" label="创建时间" width="180">
+          <template #default="{ row }">{{ formatDate(row.created_at) }}</template>
+        </el-table-column>
+        <el-table-column label="操作" width="200">
+          <template #default="{ row }">
+            <el-button link type="primary" @click="editAnnouncement(row)">编辑</el-button>
+            <el-button link :type="row.is_active ? 'warning' : 'success'" @click="toggleActive(row)">
+              {{ row.is_active ? '禁用' : '启用' }}
+            </el-button>
+            <el-button link type="danger" @click="deleteAnnouncement(row.id)">删除</el-button>
+          </template>
+        </el-table-column>
+      </el-table>
+    </div>
+
+    <el-dialog v-model="showAdd" :title="editing ? '编辑公告' : '添加公告'" width="500px">
+      <el-form :model="form" label-width="80px">
+        <el-form-item label="标题" required>
+          <el-input v-model="form.title" placeholder="请输入公告标题" />
+        </el-form-item>
+        <el-form-item label="内容">
+          <el-input v-model="form.content" type="textarea" :rows="3" placeholder="请输入公告内容" />
+        </el-form-item>
+        <el-form-item label="排序">
+          <el-input-number v-model="form.sort_order" :min="0" />
+        </el-form-item>
+        <el-form-item label="状态">
+          <el-switch v-model="form.is_active" active-text="启用" inactive-text="禁用" />
+        </el-form-item>
+      </el-form>
+      <template #footer>
+        <el-button @click="showAdd = false">取消</el-button>
+        <el-button type="primary" @click="saveAnnouncement" :loading="saving">保存</el-button>
+      </template>
+    </el-dialog>
+  </div>
+</template>
+
+<script setup lang="ts">
+import { ref, onMounted } from 'vue'
+import { ElMessage, ElMessageBox } from 'element-plus'
+import { adminApi } from '../../api'
+
+const announcements = ref<any[]>([])
+const loading = ref(false)
+const showAdd = ref(false)
+const editing = ref(false)
+const saving = ref(false)
+const editingId = ref<number | null>(null)
+
+const form = ref({
+  title: '',
+  content: '',
+  sort_order: 0,
+  is_active: true,
+})
+
+function formatDate(date: string) {
+  if (!date) return '-'
+  const d = new Date(date)
+  return d.toLocaleString('zh-CN')
+}
+
+async function fetchAnnouncements() {
+  loading.value = true
+  try {
+    const res: any = await adminApi.getAnnouncements()
+    announcements.value = res.data || []
+  } catch (err) {
+    console.error(err)
+  } finally {
+    loading.value = false
+  }
+}
+
+function editAnnouncement(row: any) {
+  editing.value = true
+  editingId.value = row.id
+  form.value = {
+    title: row.title,
+    content: row.content || '',
+    sort_order: row.sort_order || 0,
+    is_active: row.is_active,
+  }
+  showAdd.value = true
+}
+
+async function saveAnnouncement() {
+  if (!form.value.title.trim()) {
+    ElMessage.warning('请输入公告标题')
+    return
+  }
+  saving.value = true
+  try {
+    if (editing.value && editingId.value) {
+      await adminApi.updateAnnouncement(editingId.value, form.value)
+      ElMessage.success('更新成功')
+    } else {
+      await adminApi.createAnnouncement(form.value)
+      ElMessage.success('添加成功')
+    }
+    showAdd.value = false
+    fetchAnnouncements()
+  } catch (err: any) {
+    ElMessage.error(err.response?.data?.error || '保存失败')
+  } finally {
+    saving.value = false
+  }
+}
+
+async function toggleActive(row: any) {
+  try {
+    await adminApi.toggleAnnouncement(row.id)
+    ElMessage.success('状态已更新')
+    fetchAnnouncements()
+  } catch (err: any) {
+    ElMessage.error(err.response?.data?.error || '操作失败')
+  }
+}
+
+async function deleteAnnouncement(id: number) {
+  try {
+    await ElMessageBox.confirm('确定要删除该公告吗？', '提示', { type: 'warning' })
+    await adminApi.deleteAnnouncement(id)
+    ElMessage.success('删除成功')
+    fetchAnnouncements()
+  } catch (err: any) {
+    if (err !== 'cancel') {
+      ElMessage.error(err.response?.data?.error || '删除失败')
+    }
+  }
+}
+
+onMounted(() => {
+  fetchAnnouncements()
+})
+</script>
+
+<style scoped lang="scss">
+.announcements-page {
+  padding: 0;
+}
+
+.page-header {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  margin-bottom: 20px;
+}
+
+.page-header h2 {
+  font-size: 20px;
+  font-weight: 600;
+  color: #fff;
+  margin: 0;
+}
+
+.table-card {
+  background: #2d2d44;
+  border: 1px solid rgba(255, 255, 255, 0.06);
+  border-radius: 12px;
+  padding: 20px;
+}
+</style>

frontend/src/views/user/Home.vue

@@ -1,5 +1,19 @@
 <template>
   <div class="home-page">
+    <!-- 公告区域 -->
+    <div class="announcement-bar" v-if="announcements.length">
+      <div class="announcement-icon">
+        <el-icon><Bell /></el-icon>
+      </div>
+      <div class="announcement-content">
+        <el-carousel height="32px" direction="vertical" :autoplay="true" :interval="4000" indicator-position="none">
+          <el-carousel-item v-for="(item, index) in announcements" :key="index">
+            <span class="announcement-text">{{ item.title }}</span>
+          </el-carousel-item>
+        </el-carousel>
+      </div>
+    </div>
+
     <div class="banner-section">
       <el-carousel height="280px" :interval="5000" arrow="hover" trigger="click">
         <el-carousel-item v-for="(banner, index) in banners" :key="index">
@@ -111,8 +125,8 @@
 <script setup lang="ts">
 import { ref, onMounted, shallowRef } from 'vue'
 import { useRouter } from 'vue-router'
-import { Goods, Trophy, Document, ShoppingCart, Folder, Present, Star, Timer, ArrowRight } from '@element-plus/icons-vue'
+import { Goods, Trophy, Document, ShoppingCart, Folder, Present, Star, Timer, ArrowRight, Bell } from '@element-plus/icons-vue'
-import { categoryApi, lotteryApi, articleApi, bannerApi } from '../../api'
+import { categoryApi, lotteryApi, articleApi, bannerApi, announcementApi } from '../../api'
 import { getImageUrl } from '../../utils/image'
 
 const router = useRouter()
@@ -120,6 +134,7 @@ const categories = ref<any[]>([])
 const lotteries = ref<any[]>([])
 const articles = ref<any[]>([])
 const banners = ref<any[]>([])
+const announcements = ref<any[]>([])
 
 const defaultBanners = [
   { title: '新品上市', desc: '精选优质商品，限时特惠', btn: '立即选购', link: '/products', icon: shallowRef(Present), bg: 'linear-gradient(135deg, #4e6ef2 0%, #7c5cfc 100%)' },
@@ -142,15 +157,17 @@ function formatDate(date: string) {
 
 onMounted(async () => {
   try {
-    const [catRes, lotRes, artRes, banRes]: any[] = await Promise.all([
+    const [catRes, lotRes, artRes, banRes, annRes]: any[] = await Promise.all([
       categoryApi.list(),
       lotteryApi.list(),
       articleApi.list({ page: 1, page_size: 5 }),
       bannerApi.list(),
+      announcementApi.list(),
     ])
     categories.value = (catRes.data || []).slice(0, 6)
     lotteries.value = (lotRes.data || []).slice(0, 3)
     articles.value = (artRes.data || []).slice(0, 5)
+    announcements.value = annRes.data || []
 
     if (banRes.data && banRes.data.length > 0) {
       banners.value = banRes.data
@@ -173,6 +190,53 @@ onMounted(async () => {
   box-sizing: border-box;
 }
 
+.announcement-bar {
+  display: flex;
+  align-items: center;
+  gap: 12px;
+  padding: 8px 16px;
+  background: linear-gradient(135deg, rgba(78, 110, 242, 0.15), rgba(124, 92, 252, 0.15));
+  border: 1px solid rgba(78, 110, 242, 0.2);
+  border-radius: 10px;
+  margin-bottom: 16px;
+}
+
+.announcement-icon {
+  width: 28px;
+  height: 28px;
+  border-radius: 6px;
+  background: linear-gradient(135deg, #4e6ef2, #7c5cfc);
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  color: #fff;
+  flex-shrink: 0;
+  animation: bell-ring 2s ease-in-out infinite;
+}
+
+@keyframes bell-ring {
+  0%, 100% { transform: rotate(0); }
+  10%, 30% { transform: rotate(10deg); }
+  20%, 40% { transform: rotate(-10deg); }
+  50% { transform: rotate(0); }
+}
+
+.announcement-content {
+  flex: 1;
+  min-width: 0;
+  overflow: hidden;
+}
+
+.announcement-text {
+  font-size: 14px;
+  color: rgba(255, 255, 255, 0.85);
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  display: block;
+  line-height: 32px;
+}
+
 .banner-section {
   margin-bottom: 24px;
   width: 100%;