修复：恢复 PostgreSQL 集成测试并规范工单搜索条件

apps/backend/src/db/postgres.integration.test.ts

@@ -35,7 +35,7 @@ test(
     const tableName = `integration_webhook_${Date.now()}`
     try {
       await pool.query(
-        `CREATE TEMP TABLE ${tableName} (
+        `CREATE TABLE ${tableName} (
         id serial primary key,
         provider text not null,
         event_id text not null,
@@ -54,6 +54,7 @@ test(
       const result = await pool.query(`SELECT COUNT(*)::int AS count FROM ${tableName}`)
       assert.equal(result.rows[0].count, 1)
     } finally {
+      await pool.query(`DROP TABLE IF EXISTS ${tableName}`)
       await pool.end()
     }
   },

apps/backend/src/repositories/worker-platform/work-order-query-repo.ts

@@ -690,6 +690,7 @@ export function buildWorkOrderWhere({
   const filters: string[] = []
   const params: unknown[] = []
   const joins: string[] = []
+  const normalizedKeyword = String(keyword || '').trim()
   if (createdFrom) {
     params.push(createdFrom)
     filters.push(
@@ -808,8 +809,8 @@ export function buildWorkOrderWhere({
     params.push(workOrderId)
     filters.push(`wo.id = $${params.length}`)
   }
-  if (keyword) {
-    params.push(`%${keyword}%`)
+  if (normalizedKeyword) {
+    params.push(`%${normalizedKeyword}%`)
     filters.push(`${workOrderSearchExpression()} LIKE LOWER($${params.length})`)
   }
   if (workerId) {