refactor(mapper): 替换MyBatis XML中的case表达式为choose标签

将多个SQL查询里的case when分组逻辑替换为更易读的mybatis choose标签，同时修正用户手机号字段名匹配错误

backend/src/main/resources/mapper/llm/LlmMcpMapper.xml

@@ -911,10 +911,10 @@
           cross join users_scope u
         )
         select
-          case
-            when #{groupBy} = 'owner' then e.user_name
-            else to_char(e.report_date, 'YYYY-MM-DD')
-          end as "groupName",
+          <choose>
+            <when test="groupBy == 'owner'">e.user_name</when>
+            <otherwise>to_char(e.report_date, 'YYYY-MM-DD')</otherwise>
+          </choose> as "groupName",
           count(1)::bigint as "expectedCount",
           count(r.id)::bigint as "submittedCount",
           (count(1) - count(r.id))::bigint as "missingCount",
@@ -924,7 +924,11 @@
           on r.user_id = e.user_id
          and r.report_date = e.report_date
          and coalesce(r.status, 'submitted') in ('submitted', 'read', 'reviewed')
-        group by case when #{groupBy} = 'owner' then e.user_name else to_char(e.report_date, 'YYYY-MM-DD') end
+        group by
+          <choose>
+            <when test="groupBy == 'owner'">e.user_name</when>
+            <otherwise>to_char(e.report_date, 'YYYY-MM-DD')</otherwise>
+          </choose>
         order by "groupName" asc
         limit #{limit}
         offset #{offset}
@@ -932,11 +936,11 @@
 
     <select id="checkinSummary" resultType="java.util.LinkedHashMap">
         select
-          case
-            when #{groupBy} = 'owner' then coalesce(nullif(btrim(u.display_name), ''), nullif(btrim(u.username), ''), c.user_name, '')
-            when #{groupBy} = 'status' then coalesce(c.status, 'normal')
-            else to_char(c.checkin_date, 'YYYY-MM-DD')
-          end as "groupName",
+          <choose>
+            <when test="groupBy == 'owner'">coalesce(nullif(btrim(u.display_name), ''), nullif(btrim(u.username), ''), c.user_name, '')</when>
+            <when test="groupBy == 'status'">coalesce(c.status, 'normal')</when>
+            <otherwise>to_char(c.checkin_date, 'YYYY-MM-DD')</otherwise>
+          </choose> as "groupName",
           count(1)::bigint as "checkinCount",
           count(distinct c.user_id)::bigint as "userCount",
           count(distinct c.biz_id) filter (where c.biz_id is not null)::bigint as "bizCount"
@@ -945,11 +949,12 @@
         where c.checkin_date between #{startDate} and #{endDate}
         <if test="ownerUserId != null">and c.user_id = #{ownerUserId}</if>
         <if test="tenantId != null">and exists (select 1 from sys_tenant_user tu where tu.user_id = c.user_id and tu.tenant_id = #{tenantId} and coalesce(tu.is_deleted, 0) = 0)</if>
-        group by case
-          when #{groupBy} = 'owner' then coalesce(nullif(btrim(u.display_name), ''), nullif(btrim(u.username), ''), c.user_name, '')
-          when #{groupBy} = 'status' then coalesce(c.status, 'normal')
-          else to_char(c.checkin_date, 'YYYY-MM-DD')
-        end
+        group by
+          <choose>
+            <when test="groupBy == 'owner'">coalesce(nullif(btrim(u.display_name), ''), nullif(btrim(u.username), ''), c.user_name, '')</when>
+            <when test="groupBy == 'status'">coalesce(c.status, 'normal')</when>
+            <otherwise>to_char(c.checkin_date, 'YYYY-MM-DD')</otherwise>
+          </choose>
         order by "checkinCount" desc, "groupName" asc
         limit #{limit}
         offset #{offset}
@@ -1003,21 +1008,22 @@
 
     <select id="customerSummary" resultType="java.util.LinkedHashMap">
         select
-          case
-            when #{groupBy} = 'status' then coalesce(c.status, 'unknown')
-            when #{groupBy} = 'source' then coalesce(c.source, 'unknown')
-            else coalesce(c.industry, 'unknown')
-          end as "groupName",
+          <choose>
+            <when test="groupBy == 'status'">coalesce(c.status, 'unknown')</when>
+            <when test="groupBy == 'source'">coalesce(c.source, 'unknown')</when>
+            <otherwise>coalesce(c.industry, 'unknown')</otherwise>
+          </choose> as "groupName",
           count(1)::bigint as "customerCount"
         from crm_customer c
         where c.created_at::date between #{startDate} and #{endDate}
         <if test="ownerUserId != null">and c.owner_user_id = #{ownerUserId}</if>
         <if test="tenantId != null">and exists (select 1 from sys_tenant_user tu where tu.user_id = c.owner_user_id and tu.tenant_id = #{tenantId} and coalesce(tu.is_deleted, 0) = 0)</if>
-        group by case
-          when #{groupBy} = 'status' then coalesce(c.status, 'unknown')
-          when #{groupBy} = 'source' then coalesce(c.source, 'unknown')
-          else coalesce(c.industry, 'unknown')
-        end
+        group by
+          <choose>
+            <when test="groupBy == 'status'">coalesce(c.status, 'unknown')</when>
+            <when test="groupBy == 'source'">coalesce(c.source, 'unknown')</when>
+            <otherwise>coalesce(c.industry, 'unknown')</otherwise>
+          </choose>
         order by "customerCount" desc, "groupName" asc
         limit #{limit}
         offset #{offset}
@@ -1025,7 +1031,10 @@
 
     <select id="todoSummary" resultType="java.util.LinkedHashMap">
         select
-          case when #{groupBy} = 'status' then t.status else t.priority end as "groupName",
+          <choose>
+            <when test="groupBy == 'status'">t.status</when>
+            <otherwise>t.priority</otherwise>
+          </choose> as "groupName",
           count(1)::bigint as "todoCount",
           count(case when t.status = 'todo' then 1 end)::bigint as "pendingCount",
           count(case when t.status = 'done' then 1 end)::bigint as "doneCount"
@@ -1033,7 +1042,11 @@
         where t.created_at::date between #{startDate} and #{endDate}
         <if test="ownerUserId != null">and t.user_id = #{ownerUserId}</if>
         <if test="tenantId != null">and exists (select 1 from sys_tenant_user tu where tu.user_id = t.user_id and tu.tenant_id = #{tenantId} and coalesce(tu.is_deleted, 0) = 0)</if>
-        group by case when #{groupBy} = 'status' then t.status else t.priority end
+        group by
+          <choose>
+            <when test="groupBy == 'status'">t.status</when>
+            <otherwise>t.priority</otherwise>
+          </choose>
         order by "todoCount" desc, "groupName" asc
         limit #{limit}
         offset #{offset}
@@ -1151,7 +1164,7 @@
           u.user_id as "userId",
           u.username as "username",
           coalesce(nullif(btrim(u.display_name), ''), nullif(btrim(u.username), ''), '') as "displayName",
-          coalesce(u.mobile, '') as "mobile",
+          coalesce(u.phone, '') as "mobile",
           coalesce(u.email, '') as "email",
           coalesce(u.status, 1) as "status",
           org_info.org_ids as "orgIds",
@@ -1186,7 +1199,7 @@
             coalesce(u.username, '') ilike concat('%', #{keyword}, '%')
             or coalesce(u.display_name, '') ilike concat('%', #{keyword}, '%')
             or coalesce(u.username, '') ilike concat('%', #{keyword}, '%')
-            or coalesce(u.mobile, '') ilike concat('%', #{keyword}, '%')
+            or coalesce(u.phone, '') ilike concat('%', #{keyword}, '%')
             or coalesce(u.email, '') ilike concat('%', #{keyword}, '%')
             or coalesce(org_info.org_names, '') ilike concat('%', #{keyword}, '%')
             or coalesce(role_info.role_names, '') ilike concat('%', #{keyword}, '%')