feat: 会议劳务/会务材料分轨审核 + 注册页标题 + 下拉空值修复

会议材料分轨 (material_audit_stage 单轨 → labor/service 双轨):
- biz_meeting: labor_audit_stage/labor_compliance_approved + service_audit_stage/service_compliance_approved 四列替换原单轨两列
- StageDeriver: 单轨状态机(R/N/C0/C1/A) + 角色优先级选代表轨 + 会议物理态取两轨最小进度
- MeetingAuditStageEnum / 前端 meetingStage.js 镜像: 分轨推导 + 颜色跟随角色展示阶段(避免文案与颜色错位)
- BizMeetingController/ServiceImpl/AuditLog + mapper + MeetingStageScheduler 同步分轨字段
- MeetingDetail/Meetings/doctor/executor Meetings/ManagerProjectDetail/ManagerProjectsAssign/PublicityDetail 同步双轨

其它:
- 注册页 (执行单位/专家/支持单位) 加居中页标题
- DoctorDeptSelect/DoctorTitleSelect 空字符串统一 null, 避免挂载必填项飘红
- BizOrgMapper sponsor/executor options 加 status 字段
- sponsor/NewPerson 编辑态 orgName 只读

ry-api/ruoyi-business/src/main/resources/mapper/business/BizMeetingAuditLogMapper.xml

@@ -15,11 +15,12 @@
         <result property="auditTime"     column="audit_time"     />
         <result property="auditType"     column="audit_type"     />
         <result property="auditResult"   column="audit_result"   />
+        <result property="materialType"  column="material_type"  />
         <result property="isDeleted"     column="is_deleted"     />
     </resultMap>
 
     <sql id="selectFields">
-        select id, meeting_id, auditor, opinion, executor_stage, sponsor_stage, manager_stage, admin_stage, create_time, audit_time, audit_type, audit_result, is_deleted
+        select id, meeting_id, auditor, opinion, executor_stage, sponsor_stage, manager_stage, admin_stage, create_time, audit_time, audit_type, audit_result, material_type, is_deleted
         from biz_meeting_audit_log
     </sql>
 
@@ -52,6 +53,7 @@
             <if test="auditTime != null">audit_time,</if>
             <if test="auditType != null and auditType != ''">audit_type,</if>
             <if test="auditResult != null and auditResult != ''">audit_result,</if>
+            <if test="materialType != null and materialType != ''">material_type,</if>
         </trim>
         <trim prefix="values (" suffix=")" suffixOverrides=",">
             <if test="meetingId != null">#{meetingId},</if>
@@ -65,6 +67,7 @@
             <if test="auditTime != null">#{auditTime},</if>
             <if test="auditType != null and auditType != ''">#{auditType},</if>
             <if test="auditResult != null and auditResult != ''">#{auditResult},</if>
+            <if test="materialType != null and materialType != ''">#{materialType},</if>
         </trim>
     </insert>