fix(seeds): 修复多门店种子数据互不干扰

- S001.sql: 修复 INSERT IGNORE INTO 缺少空格的语法错误
- S002.sql: 重写为动态 @shop_id 模式，移除 TRUNCATE，改用 INSERT IGNORE INTO
- clear_shop.sql: 新增按 @shop_code 清空单店数据的参数化脚本
- scripts/dev.sh: seed 命令支持 --clear 参数（先清空再写入）
- seed.yml: 新增 clear 输入参数，支持按需清空后写入

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.gitea/workflows/seed.yml

@@ -7,6 +7,10 @@ on:
         description: '要写入的门店（逗号分隔，如 S001,S002,S003）'
         required: true
         default: 'S001,S002,S003'
+      clear:
+        description: '写入前先清空各门店数据（true/false）'
+        required: false
+        default: 'false'
 
 jobs:
   seed:
@@ -27,6 +31,7 @@ jobs:
           EC2_USER: ${{ secrets.EC2_USER }}
           DB_PASSWORD: ${{ secrets.DB_PASSWORD }}
           SHOPS: ${{ github.event.inputs.shops }}
+          CLEAR: ${{ github.event.inputs.clear }}
         run: |
           for SHOP in $(echo "$SHOPS" | tr ',' ' '); do
             FILE="backend/seeds/${SHOP}.sql"
@@ -35,6 +40,12 @@ jobs:
               continue
             fi
             echo "→ Seeding $SHOP ..."
+            if [ "$CLEAR" = "true" ]; then
+              echo "  清空 ${SHOP} 数据..."
+              printf "SET @shop_code='%s';\n" "$SHOP" | cat - backend/seeds/clear_shop.sql | \
+                ssh -i ~/.ssh/ec2_deploy.pem ${EC2_USER}@${EC2_HOST} \
+                  "docker exec -i jiu_mysql mysql -uroot -p${DB_PASSWORD} --default-character-set=utf8mb4 jiu_db"
+            fi
             ssh -i ~/.ssh/ec2_deploy.pem ${EC2_USER}@${EC2_HOST} \
               "docker exec -i jiu_mysql mysql -uroot -p${DB_PASSWORD} --default-character-set=utf8mb4 jiu_db" \
               < "$FILE"