Update search placeholder to indicate fuzzy search support

The stored procedure now supports LIKE matching on 车间号,
so update the placeholder hint to inform users they can enter
partial workshop numbers for fuzzy matching.

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

src/app/page.tsx

@@ -409,7 +409,7 @@ function SearchBar({
           >
             <Input
               prefix={<SearchOutlined />}
-              placeholder="请输入车间号，如 R05697"
+              placeholder="支持模糊搜索，输入排产号数字部分即可查询"
               onPressEnter={handleSearch}
               allowClear
             />