fix(credit): 修正供应商实体字段描述并扩展搜索功能

- 将CreditSupplier实体中的purchaseAmount字段描述从"销售金额"更正为"采购金额"
- 更新CreditSupplierImportParam参数类中相应字段的Excel注解描述
- 在CreditSupplierMapper.xml中扩展关键词搜索功能，增加对supplier字段的搜索支持

src/main/java/com/gxwebsoft/credit/entity/CreditSupplier.java

@@ -39,7 +39,7 @@ public class CreditSupplier implements Serializable {
     @Schema(description = "状态")
     private String statusTxt;
 
-    @Schema(description = "销售金额(万元)")
+    @Schema(description = "采购金额(万元)")
     private String purchaseAmount;
 
     @Schema(description = "公开日期")

src/main/java/com/gxwebsoft/credit/mapper/xml/CreditSupplierMapper.xml

@@ -60,6 +60,7 @@
             <if test="param.keywords != null">
                 AND (a.comments LIKE CONCAT('%', #{param.keywords}, '%')
                   OR b.name LIKE CONCAT('%', #{param.keywords}, '%')
+                  OR a.supplier LIKE CONCAT('%', #{param.keywords}, '%')
                 )
               </if>
         </where>

src/main/java/com/gxwebsoft/credit/param/CreditSupplierImportParam.java

@@ -18,7 +18,7 @@ public class CreditSupplierImportParam implements Serializable {
     @Excel(name = "状态")
     private String statusTxt;
 
-    @Excel(name = "销售金额(万元)")
+    @Excel(name = "采购金额(万元)")
     private String purchaseAmount;
 
     @Excel(name = "公开日期")