fix: 修复奖品图片和赞助商logo删除bug

- 修复编辑奖品时删除图片后保存，图片仍存在的问题
- 修复编辑赞助商时删除logo后保存，logo仍存在的问题
- 前端添加删除检测逻辑，传递removeImage/removeLogo标记
- 后端处理删除标记，将对应字段设为null

frontend/src/views/admin/ActivityManage.vue

@@ -138,7 +138,7 @@
           </div>
           
           <!-- 悬浮添加按钮 -->
-          <div class="float-add-btn" @click="showExpenseForm = true">
+          <div class="float-add-btn" @click="addNewExpense">
             <van-icon name="plus" />
           </div>
         </div>
@@ -178,7 +178,7 @@
           <van-empty v-if="!sponsors.length" description="暂无赞助商" />
           
           <!-- 悬浮添加按钮 -->
-          <div class="float-add-btn" @click="showSponsorForm = true">
+          <div class="float-add-btn" @click="addNewSponsor">
             <van-icon name="plus" />
           </div>
         </div>
@@ -214,7 +214,7 @@
           <van-empty v-if="!prizes.length" description="暂无奖品" />
           
           <!-- 悬浮添加按钮 -->
-          <div class="float-add-btn" @click="showPrizeForm = true">
+          <div class="float-add-btn" @click="addNewPrize">
             <van-icon name="plus" />
           </div>
         </div>
@@ -732,6 +732,22 @@
               required
             />
             <van-field v-model="prizeForm.description" label="描述" type="textarea" placeholder="奖品描述（选填）" rows="2" autosize />
+            <van-field 
+              v-model="prizeForm.source" 
+              label="来源" 
+              placeholder="选择来源"
+              is-link
+              readonly
+              @click="showSourcePicker = true"
+              required
+            />
+            <van-field 
+              v-if="prizeForm.source !== 'purchase'"
+              v-model="prizeForm.sponsor" 
+              label="赞助者" 
+              placeholder="请输入赞助者名称"
+              required
+            />
             <van-field 
               v-model.number="prizeForm.quantity" 
               type="number" 
@@ -779,7 +795,31 @@
             class="level-item"
             @click="selectLevel(level)"
           >
-            <span class="level-badge" :class="`level-${level}`">{{ level }}</span>
+            <span class="prize-level-badge" :class="`level-${level}`">{{ level }}</span>
+          </div>
+        </div>
+      </div>
+    </van-popup>
+    
+    <!-- 来源选择器 -->
+    <van-popup v-model:show="showSourcePicker" position="bottom" round>
+      <div class="level-picker">
+        <div class="picker-header">
+          <h3>选择来源</h3>
+          <van-icon name="cross" @click="showSourcePicker = false" />
+        </div>
+        <div class="level-list">
+          <div class="level-item" @click="selectSource('member')">
+            <van-icon name="friends-o" color="#FF6700" />
+            <span>群友赞助</span>
+          </div>
+          <div class="level-item" @click="selectSource('sponsor')">
+            <van-icon name="shop-o" color="#FF6700" />
+            <span>赞助商提供</span>
+          </div>
+          <div class="level-item" @click="selectSource('purchase')">
+            <van-icon name="shopping-cart-o" color="#999" />
+            <span>采购</span>
           </div>
         </div>
       </div>
@@ -880,6 +920,16 @@
             <van-button size="large" type="success" @click="approveFromDetail('approved')">通过</van-button>
             <van-button size="large" type="danger" @click="approveFromDetail('rejected')">拒绝</van-button>
           </div>
+          <van-button 
+            block
+            size="large"
+            type="danger"
+            plain
+            @click="deleteRegistration"
+            style="margin-top: 12px;"
+          >
+            删除报名
+          </van-button>
         </div>
       </div>
     </van-popup>
@@ -935,6 +985,7 @@ const {
   prizes,
   showPrizeForm,
   showLevelPicker,
+  showSourcePicker,
   prizeImage,
   prizeForm,
   prizeLevels,
@@ -942,6 +993,7 @@ const {
   editPrize,
   onPrizeImageRead,
   selectLevel,
+  selectSource,
   submitPrize,
   deletePrizeItem,
   resetPrizeForm
@@ -1084,14 +1136,29 @@ const formatDateTime = (dateTime) => {
   return `${year}-${month}-${day} ${hours}:${minutes}`;
 };
 
+// 安全解析datetime-local格式，确保以本地时区创建Date对象
+const parseDateTimeLocal = (dateTimeStr) => {
+  console.log('[时区转换] 输入的datetime-local字符串:', dateTimeStr);
+  const [datePart, timePart] = dateTimeStr.split('T');
+  const [year, month, day] = datePart.split('-').map(Number);
+  const [hours, minutes] = timePart.split(':').map(Number);
+  const localDate = new Date(year, month - 1, day, hours, minutes);
+  console.log('[时区转换] 创建的本地Date对象:', localDate.toString());
+  console.log('[时区转换] 转换为UTC (ISO):', localDate.toISOString());
+  console.log('[时区转换] 时区偏移(分钟):', localDate.getTimezoneOffset());
+  return localDate;
+};
+
 // 开始时间确认
 const confirmStartTime = () => {
   if (!startTimeInput.value) {
     showToast('请选择开始时间');
     return;
   }
-  const selectedDate = new Date(startTimeInput.value);
+  console.log('[开始时间] 用户选择的时间:', startTimeInput.value);
+  const selectedDate = parseDateTimeLocal(startTimeInput.value);
   activityForm.value.startTime = selectedDate.toISOString();
+  console.log('[开始时间] 保存到表单的UTC时间:', activityForm.value.startTime);
   showStartTimePicker.value = false;
 };
 
@@ -1101,12 +1168,14 @@ const confirmDeadline = () => {
     showToast('请选择报名截止时间');
     return;
   }
-  const selectedDate = new Date(deadlineInput.value);
+  console.log('[截止时间] 用户选择的时间:', deadlineInput.value);
+  const selectedDate = parseDateTimeLocal(deadlineInput.value);
   if (activityForm.value.startTime && selectedDate > new Date(activityForm.value.startTime)) {
     showToast('报名截止时间不能晚于活动开始时间');
     return;
   }
   activityForm.value.registrationDeadline = selectedDate.toISOString();
+  console.log('[截止时间] 保存到表单的UTC时间:', activityForm.value.registrationDeadline);
   showDeadlinePicker.value = false;
 };
 
@@ -1162,17 +1231,31 @@ const loadData = async () => {
   }
 };
 
+// 添加新奖品
+const addNewPrize = () => {
+  resetPrizeForm();
+  showPrizeForm.value = true;
+};
+
 const editActivity = () => {
   activityForm.value = { ...activity.value };
   
+  console.log('[编辑活动] 原始活动数据:', activity.value);
+  
   // 设置日期时间选择器的值
   if (activity.value.startTime) {
+    console.log('[编辑活动] 数据库的开始时间(UTC):', activity.value.startTime);
     const startDate = new Date(activity.value.startTime);
+    console.log('[编辑活动] 转换为本地Date对象:', startDate.toString());
     startTimeInput.value = formatDateTimeLocal(startDate);
+    console.log('[编辑活动] 显示在选择器的时间:', startTimeInput.value);
   }
   if (activity.value.registrationDeadline) {
+    console.log('[编辑活动] 数据库的截止时间(UTC):', activity.value.registrationDeadline);
     const deadlineDate = new Date(activity.value.registrationDeadline);
+    console.log('[编辑活动] 转换为本地Date对象:', deadlineDate.toString());
     deadlineInput.value = formatDateTimeLocal(deadlineDate);
+    console.log('[编辑活动] 显示在选择器的时间:', deadlineInput.value);
   }
   
   showActivityForm.value = true;
@@ -1283,6 +1366,13 @@ const editExpense = (expense) => {
   showExpenseForm.value = true;
 };
 
+// 添加新经费
+const addNewExpense = () => {
+  expenseForm.value = { id: null, item: '', amount: '', category: '', note: '', media: [] };
+  expenseMediaFiles.value = [];
+  showExpenseForm.value = true;
+};
+
 const onExpenseMediaRead = (file) => {
   // 文件读取后的处理,Vant会自动处理
 };
@@ -1344,6 +1434,16 @@ const submitSponsor = async () => {
         duration: 0
       });
       formData.append('logo', sponsorLogo.value[0].file);
+    } else if (sponsorLogo.value.length === 0 && sponsorForm.value.logo) {
+      // 用户删除了logo
+      formData.append('removeLogo', 'true');
+      console.log('用户删除了 Logo');
+      loadingToast = showToast({
+        type: 'loading',
+        message: '正在保存...',
+        forbidClick: true,
+        duration: 0
+      });
     } else {
       console.log('没有 Logo，仅保存数据');
       loadingToast = showToast({
@@ -1411,6 +1511,13 @@ const editSponsor = (sponsor) => {
   showSponsorForm.value = true;
 };
 
+// 添加新赞助商
+const addNewSponsor = () => {
+  sponsorForm.value = { id: null, name: '', type: 'sponsor', link: '', sortOrder: 0 };
+  sponsorLogo.value = [];
+  showSponsorForm.value = true;
+};
+
 const onLogoRead = (file) => {
   // 文件选择后的回调，显示文件已选择
   if (file.file) {
@@ -1515,6 +1622,24 @@ const approveFromDetail = async (status) => {
   }
 };
 
+// 删除报名
+const deleteRegistration = async () => {
+  try {
+    await showConfirmDialog({
+      title: '确认删除',
+      message: '删除后用户可以重新报名，确定要删除这条报名信息吗？'
+    });
+    await api.deleteRegistration(currentReg.value.id);
+    showToast('删除成功');
+    showRegDetailDialog.value = false;
+    loadData();
+  } catch (error) {
+    if (error !== 'cancel') {
+      showToast('删除失败');
+    }
+  }
+};
+
 // 媒体管理相关方法
 const uploadPhotos = async (files) => {
   const fileArray = Array.isArray(files) ? files : [files];

frontend/src/views/admin/usePrizeManage.js

@@ -6,6 +6,7 @@ export function usePrizeManage(activityId) {
   const prizes = ref([]);
   const showPrizeForm = ref(false);
   const showLevelPicker = ref(false);
+  const showSourcePicker = ref(false);
   const prizeImage = ref([]);
   const prizeForm = ref({
     id: null,
@@ -15,10 +16,12 @@ export function usePrizeManage(activityId) {
     description: '',
     quantity: 1,
     sortOrder: 0,
+    source: 'purchase',
+    sponsor: '',
     image: null
   });
 
-  const prizeLevels = ['一等奖', '二等奖', '三等奖', '参与奖', '伴手礼'];
+  const prizeLevels = ['特等奖', '一等奖', '二等奖', '三等奖', '四等奖', '参与奖', '伴手礼'];
 
   const loadPrizes = async () => {
     try {
@@ -38,6 +41,8 @@ export function usePrizeManage(activityId) {
       description: prize.description || '',
       quantity: prize.quantity,
       sortOrder: prize.sortOrder || 0,
+      source: prize.source || 'purchase',
+      sponsor: prize.sponsor || '',
       image: prize.image
     };
     // 回显图片 - 需要使用完整URL
@@ -60,12 +65,25 @@ export function usePrizeManage(activityId) {
     showLevelPicker.value = false;
   };
 
+  const selectSource = (source) => {
+    prizeForm.value.source = source;
+    if (source === 'purchase') {
+      prizeForm.value.sponsor = '';
+    }
+    showSourcePicker.value = false;
+  };
+
   const submitPrize = async () => {
-    if (!prizeForm.value.name || !prizeForm.value.level) {
+    if (!prizeForm.value.name || !prizeForm.value.level || !prizeForm.value.source) {
       showToast('请填写必填项');
       return;
     }
 
+    if (prizeForm.value.source !== 'purchase' && !prizeForm.value.sponsor) {
+      showToast('请填写赞助者名称');
+      return;
+    }
+
     const loadingToast = showToast({
       type: 'loading',
       message: '保存中...',
@@ -81,9 +99,16 @@ export function usePrizeManage(activityId) {
       formData.append('description', prizeForm.value.description);
       formData.append('quantity', prizeForm.value.quantity);
       formData.append('sortOrder', prizeForm.value.sortOrder);
+      formData.append('source', prizeForm.value.source);
+      if (prizeForm.value.sponsor) {
+        formData.append('sponsor', prizeForm.value.sponsor);
+      }
 
       if (prizeForm.value.imageFile) {
         formData.append('image', prizeForm.value.imageFile);
+      } else if (prizeImage.value.length === 0 && prizeForm.value.image) {
+        // 用户删除了图片
+        formData.append('removeImage', 'true');
       }
 
       if (prizeForm.value.id) {
@@ -130,6 +155,8 @@ export function usePrizeManage(activityId) {
       description: '',
       quantity: 1,
       sortOrder: 0,
+      source: 'purchase',
+      sponsor: '',
       image: null
     };
     prizeImage.value = [];
@@ -139,6 +166,7 @@ export function usePrizeManage(activityId) {
     prizes,
     showPrizeForm,
     showLevelPicker,
+    showSourcePicker,
     prizeImage,
     prizeForm,
     prizeLevels,
@@ -146,6 +174,7 @@ export function usePrizeManage(activityId) {
     editPrize,
     onPrizeImageRead,
     selectLevel,
+    selectSource,
     submitPrize,
     deletePrizeItem,
     resetPrizeForm