fix: 选手列表去重并显示已报名标记

- loadPlayerList 添加按身份证去重逻辑
- 查询已报名选手并标记 hasRegistered
- UI 显示"已报名"标签
- 选择已报名选手时弹出警告

Closes #3, Closes #4

src/api/athlete.js

@@ -81,5 +81,12 @@ export default {
 
   removeContact(id) {
     return request.post('/martial/contact/remove?ids=' + id, {})
+  },
+
+  /**
+   * 获取已报名选手列表（用于检查重复报名）
+   */
+  getRegisteredAthletes(params = {}) {
+    return request.get('/martial/athlete/registered', params)
   }
 }

src/pages/event-register/event-register.vue

@@ -30,13 +30,16 @@
         </view>
 
         <view class="player-list">
-          <view class="player-item" v-for="(item, index) in playerList" :key="index">
+          <view class="player-item" v-for="(item, index) in playerList" :key="index" :class="{ 'registered': item.hasRegistered }">
             <view class="player-checkbox" @click="togglePlayer(item)">
               <image v-if="item.selected" class="checkbox-img" src="/static/images/选中@3x.png" mode="aspectFit"></image>
               <image v-else class="checkbox-img" src="/static/images/未选中@3x.png" mode="aspectFit"></image>
             </view>
             <view class="player-info">
-              <view class="player-name">{{ item.name }}</view>
+              <view class="player-name">
+                {{ item.name }}
+                <text v-if="item.hasRegistered" class="registered-tag">已报名</text>
+              </view>
               <view class="player-id">身份证：{{ item.idCard }}</view>
             </view>
             <view class="player-actions">
@@ -426,12 +429,43 @@ export default {
         })
 
         let list = res.records || (Array.isArray(res) ? res : [])
-        this.playerList = list.map(item => ({
-          id: item.id,
-          name: item.name || item.athleteName || item.playerName || '未命名',
-          idCard: item.idCard || item.idCardNumber || '',
-          selected: false
-        }))
+        
+        // Deduplicate by idCard
+        const seen = new Set()
+        list = list.filter(item => {
+          const key = item.idCard || item.idCardNumber || item.id
+          if (seen.has(key)) return false
+          seen.add(key)
+          return true
+        })
+        
+        // Get current project IDs
+        const projectIds = this.selectedProjects.map(p => p.id)
+        
+        // Check which players have already registered for these projects
+        let registeredIdCards = []
+        if (projectIds.length > 0 && this.eventId) {
+          try {
+            const regRes = await athleteAPI.getRegisteredAthletes({
+              competitionId: this.eventId,
+              projectIds: projectIds.join(',')
+            })
+            registeredIdCards = (regRes || []).map(r => r.idCard)
+          } catch (e) {
+            console.log('查询已报名选手失败:', e)
+          }
+        }
+        
+        this.playerList = list.map(item => {
+          const idCard = item.idCard || item.idCardNumber || ''
+          return {
+            id: item.id,
+            name: item.name || item.athleteName || item.playerName || '未命名',
+            idCard: idCard,
+            selected: false,
+            hasRegistered: registeredIdCards.includes(idCard)
+          }
+        })
       } catch (err) {
         console.error('加载选手列表失败:', err)
       }
@@ -478,6 +512,17 @@ export default {
     },
 
     togglePlayer(item) {
+      // Warn if player has already registered for this project
+      if (item.hasRegistered && !item.selected) {
+        uni.showModal({
+          title: '提示',
+          content: '该选手已报名此项目，重复报名将被系统拒绝',
+          confirmText: '知道了',
+          showCancel: false
+        })
+        return
+      }
+      
       const index = this.playerList.findIndex(p => p.id === item.id)
       if (index !== -1) {
         this.$set(this.playerList[index], 'selected', !this.playerList[index].selected)
@@ -830,6 +875,24 @@ export default {
   font-weight: bold;
   color: #333333;
   margin-bottom: 10rpx;
+  display: flex;
+  align-items: center;
+  gap: 10rpx;
+}
+
+.registered-tag {
+  font-size: 22rpx;
+  font-weight: normal;
+  color: #ff6600;
+  background: #fff3e6;
+  padding: 4rpx 12rpx;
+  border-radius: 6rpx;
+  border: 1px solid #ff6600;
+}
+
+.player-item.registered {
+  opacity: 0.7;
+  background: #f9f9f9;
 }
 
 .player-id {