fix: admin records filter by user_id instead of keyword search

- RecordView passes user_id as separate filter param, not as keyword
- Admin records endpoint forwards user_id to DAO
- treatmentDao.listAdmin supports exact user_id match filter
- Added visible filter tag with clear button in RecordView

server/src/dao/treatment.dao.js

@@ -105,9 +105,13 @@ async function updateDevice(deviceId, battery, temperature) {
  * @param {number} opts.offset
  * @returns {Promise<{records: Array, total: number}>}
  */
-async function listAdmin({ keyword, dateFrom, dateTo, pageSize, offset }) {
+async function listAdmin({ keyword, userId, dateFrom, dateTo, pageSize, offset }) {
   const conditions = []
   const params = {}
+  if (userId) {
+    conditions.push('r.user_id = :user_id')
+    params.user_id = userId
+  }
   if (keyword) {
     conditions.push('u.nickname LIKE :kw')
     params.kw = '%' + keyword + '%'