diff --git a/backend/ruoyi-modules/ruoyi-aihr/src/main/java/org/dromara/aihr/service/AihrSopSeedService.java b/backend/ruoyi-modules/ruoyi-aihr/src/main/java/org/dromara/aihr/service/AihrSopSeedService.java
index 1c24bb0b..fc4e3da2 100644
--- a/backend/ruoyi-modules/ruoyi-aihr/src/main/java/org/dromara/aihr/service/AihrSopSeedService.java
+++ b/backend/ruoyi-modules/ruoyi-aihr/src/main/java/org/dromara/aihr/service/AihrSopSeedService.java
@@ -1138,7 +1138,7 @@ public class AihrSopSeedService {
             return Optional.ofNullable(jdbcTemplate.queryForObject("""
                 select o.ext1, coalesce(k.name, '') as category
                   from aihr_knowledge_attach a
-                  join sys_oss o on o.oss_id = a.oss_id and o.tenant_id = a.tenant_id
+                  join sys_oss o on o.oss_id = a.oss_id and binary o.tenant_id = binary a.tenant_id
                   left join aihr_knowledge_info k on k.id = a.knowledge_id and k.tenant_id = a.tenant_id
                  where a.tenant_id = ? and a.id = ?
                  limit 1
@@ -1169,7 +1169,7 @@ public class AihrSopSeedService {
                          else 'name-size'
                        end as match_type
                   from aihr_knowledge_attach a
-                  join sys_oss o on o.oss_id = a.oss_id and o.tenant_id = a.tenant_id
+                  join sys_oss o on o.oss_id = a.oss_id and binary o.tenant_id = binary a.tenant_id
                  where a.tenant_id = ?
                    and (
                      json_unquote(json_extract(o.ext1, '$.aihrFileSha256')) = ?
@@ -1291,8 +1291,7 @@ public class AihrSopSeedService {
     }
 
     private List<ProcessingTaskRow> processingRows() {
-        try {
-            return jdbcTemplate.query("""
+        return jdbcTemplate.query("""
                 select a.id,
                        a.oss_id,
                        i.name as category,
@@ -1307,7 +1306,7 @@ public class AihrSopSeedService {
                   from aihr_knowledge_attach a
                   join aihr_knowledge_info i on i.id = a.knowledge_id and i.tenant_id = a.tenant_id
                   left join aihr_knowledge_fragment f on f.tenant_id = a.tenant_id and f.knowledge_id = a.knowledge_id and f.doc_id = a.doc_id
-                  left join sys_oss o on o.oss_id = a.oss_id and o.tenant_id = a.tenant_id
+                  left join sys_oss o on o.oss_id = a.oss_id and binary o.tenant_id = binary a.tenant_id
                  where a.tenant_id = ?
                  group by a.id, a.oss_id, i.name, a.name, a.type, a.status, a.update_time, a.remark, o.ext1
                  order by a.update_time desc, a.id desc
@@ -1332,9 +1331,6 @@ public class AihrSopSeedService {
                     insight.reason()
                 );
             }, tenantId());
-        } catch (DataAccessException e) {
-            return List.of();
-        }
     }
 
     private ProcessingTaskResponse processingTask(ProcessingTaskRow row) {
diff --git a/backend/ruoyi-modules/ruoyi-aihr/src/test/java/org/dromara/aihr/service/AihrSopSeedServiceTest.java b/backend/ruoyi-modules/ruoyi-aihr/src/test/java/org/dromara/aihr/service/AihrSopSeedServiceTest.java
index f041dddc..d3ac99bc 100644
--- a/backend/ruoyi-modules/ruoyi-aihr/src/test/java/org/dromara/aihr/service/AihrSopSeedServiceTest.java
+++ b/backend/ruoyi-modules/ruoyi-aihr/src/test/java/org/dromara/aihr/service/AihrSopSeedServiceTest.java
@@ -5,6 +5,7 @@ import org.dromara.aihr.domain.AihrSopDto;
 import org.junit.jupiter.api.Tag;
 import org.junit.jupiter.api.Test;
 import org.mockito.ArgumentCaptor;
+import org.springframework.dao.DataAccessResourceFailureException;
 import org.springframework.jdbc.core.JdbcTemplate;
 import org.springframework.jdbc.core.RowMapper;
 
@@ -18,6 +19,7 @@ import java.util.Set;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertThrows;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 import static org.mockito.ArgumentMatchers.any;
 import static org.mockito.ArgumentMatchers.anyString;
@@ -349,13 +351,27 @@ public class AihrSopSeedServiceTest {
         }
         String code = Files.readString(source);
 
-        assertTrue(code.contains("join sys_oss o on o.oss_id = a.oss_id and o.tenant_id = a.tenant_id"));
-        assertTrue(code.contains("left join sys_oss o on o.oss_id = a.oss_id and o.tenant_id = a.tenant_id"));
+        assertTrue(code.contains("join sys_oss o on o.oss_id = a.oss_id and binary o.tenant_id = binary a.tenant_id"));
+        assertTrue(code.contains("left join sys_oss o on o.oss_id = a.oss_id and binary o.tenant_id = binary a.tenant_id"));
         assertTrue(code.contains("left join aihr_knowledge_info k on k.id = a.knowledge_id and k.tenant_id = a.tenant_id"));
         assertTrue(code.contains("where tenant_id = ? and oss_id = ? limit 1"));
         assertTrue(code.contains("where tenant_id = ? and oss_id = ?\", objectMapper.writeValueAsString(node), tenantId(), ossId"));
     }
 
+    @Test
+    @Tag("dev")
+    @SuppressWarnings({"rawtypes", "unchecked"})
+    public void processingOverviewPropagatesDatabaseFailures() {
+        JdbcTemplate jdbcTemplate = mock(JdbcTemplate.class);
+        when(jdbcTemplate.query(anyString(), any(RowMapper.class), any(Object[].class)))
+            .thenThrow(new DataAccessResourceFailureException("collation mismatch"));
+        AihrModelSeedService modelService = mock(AihrModelSeedService.class);
+        when(modelService.visionAllowed()).thenReturn(false);
+        AihrSopSeedService service = new AihrSopSeedService(new ObjectMapper(), jdbcTemplate, null, "", null, null, modelService);
+
+        assertThrows(DataAccessResourceFailureException.class, service::processingOverview);
+    }
+
     @Test
     @Tag("dev")
     public void qdrantRebuildKeepsOtherTenantsVectors() throws Exception {
diff --git a/backend/script/sql/aihr_candidate_material_mysql8.sql b/backend/script/sql/aihr_candidate_material_mysql8.sql
index e88e43d6..e08fc8fa 100644
--- a/backend/script/sql/aihr_candidate_material_mysql8.sql
+++ b/backend/script/sql/aihr_candidate_material_mysql8.sql
@@ -2,7 +2,7 @@
 
 CREATE TABLE IF NOT EXISTS `aihr_candidate_material` (
   `id` bigint NOT NULL AUTO_INCREMENT COMMENT '主键',
-  `tenant_id` varchar(20) DEFAULT '000000' COMMENT '租户编号',
+  `tenant_id` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci DEFAULT '000000' COMMENT '租户编号',
   `candidate_id` varchar(80) NOT NULL COMMENT '候选人外部ID',
   `candidate_name` varchar(100) DEFAULT NULL COMMENT '候选人姓名',
   `material_type` varchar(50) DEFAULT NULL COMMENT '资料类型',
diff --git a/backend/script/sql/aihr_interview_result_mysql8.sql b/backend/script/sql/aihr_interview_result_mysql8.sql
index 68bd77f8..5ebe4a72 100644
--- a/backend/script/sql/aihr_interview_result_mysql8.sql
+++ b/backend/script/sql/aihr_interview_result_mysql8.sql
@@ -3,7 +3,7 @@
 
 CREATE TABLE IF NOT EXISTS `aihr_interview_result` (
   `id` bigint NOT NULL AUTO_INCREMENT COMMENT '主键',
-  `tenant_id` varchar(20) DEFAULT '000000' COMMENT '租户编号',
+  `tenant_id` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci DEFAULT '000000' COMMENT '租户编号',
   `session_id` varchar(100) NOT NULL COMMENT '面试会话ID',
   `candidate_id` varchar(80) DEFAULT NULL COMMENT '候选人ID',
   `candidate_name` varchar(100) DEFAULT NULL COMMENT '候选人姓名',
@@ -33,7 +33,7 @@ CREATE TABLE IF NOT EXISTS `aihr_interview_result` (
 
 CREATE TABLE IF NOT EXISTS `aihr_candidate_employee_link` (
   `id` bigint NOT NULL AUTO_INCREMENT COMMENT '主键',
-  `tenant_id` varchar(20) DEFAULT '000000' COMMENT '租户编号',
+  `tenant_id` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci DEFAULT '000000' COMMENT '租户编号',
   `candidate_id` varchar(80) NOT NULL COMMENT '本地候选人ID',
   `ext_party_id` varchar(100) NOT NULL COMMENT '外部员工主体ID',
   `status` varchar(20) DEFAULT '已关联' COMMENT '关联状态',
diff --git a/backend/script/sql/aihr_knowledge_mysql8.sql b/backend/script/sql/aihr_knowledge_mysql8.sql
index 4dfa9748..f3360c5f 100644
--- a/backend/script/sql/aihr_knowledge_mysql8.sql
+++ b/backend/script/sql/aihr_knowledge_mysql8.sql
@@ -3,7 +3,7 @@
 
 CREATE TABLE IF NOT EXISTS `aihr_knowledge_info` (
   `id` bigint NOT NULL AUTO_INCREMENT COMMENT '主键',
-  `tenant_id` varchar(20) DEFAULT '000000' COMMENT '租户编号',
+  `tenant_id` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci DEFAULT '000000' COMMENT '租户编号',
   `name` varchar(100) NOT NULL COMMENT '知识库名称',
   `description` varchar(1000) DEFAULT NULL COMMENT '知识库描述',
   `separator` varchar(255) DEFAULT NULL COMMENT '知识分隔符',
@@ -28,7 +28,7 @@ CREATE TABLE IF NOT EXISTS `aihr_knowledge_info` (
 
 CREATE TABLE IF NOT EXISTS `aihr_knowledge_attach` (
   `id` bigint NOT NULL AUTO_INCREMENT COMMENT '主键',
-  `tenant_id` varchar(20) DEFAULT '000000' COMMENT '租户编号',
+  `tenant_id` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci DEFAULT '000000' COMMENT '租户编号',
   `knowledge_id` bigint NOT NULL COMMENT '知识库ID',
   `oss_id` bigint DEFAULT NULL COMMENT '对象存储ID',
   `doc_id` varchar(32) DEFAULT NULL COMMENT '文档ID',
@@ -48,7 +48,7 @@ CREATE TABLE IF NOT EXISTS `aihr_knowledge_attach` (
 
 CREATE TABLE IF NOT EXISTS `aihr_knowledge_fragment` (
   `id` bigint NOT NULL AUTO_INCREMENT COMMENT '主键',
-  `tenant_id` varchar(20) DEFAULT '000000' COMMENT '租户编号',
+  `tenant_id` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci DEFAULT '000000' COMMENT '租户编号',
   `knowledge_id` bigint NOT NULL COMMENT '知识库ID',
   `idx` int NOT NULL COMMENT '片段序号',
   `doc_id` varchar(32) DEFAULT NULL COMMENT '文档ID',
@@ -70,7 +70,7 @@ CREATE TABLE IF NOT EXISTS `aihr_knowledge_fragment` (
 
 CREATE TABLE IF NOT EXISTS `aihr_knowledge_import_task` (
   `id` bigint NOT NULL AUTO_INCREMENT COMMENT '主键',
-  `tenant_id` varchar(20) DEFAULT '000000' COMMENT '租户编号',
+  `tenant_id` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci DEFAULT '000000' COMMENT '租户编号',
   `directory` varchar(500) NOT NULL COMMENT '导入相对目录',
   `category` varchar(100) NOT NULL COMMENT '知识库分类',
   `status` tinyint DEFAULT 0 COMMENT '任务状态: 0等待, 1运行中, 2完成, 3失败, 4取消',
@@ -138,7 +138,7 @@ ON DUPLICATE KEY UPDATE
 -- 知识库批量上传队列：上传秒回后由后台 worker 加工，支持单文件重试
 CREATE TABLE IF NOT EXISTS `aihr_knowledge_upload_item` (
   `id` bigint NOT NULL AUTO_INCREMENT COMMENT '主键',
-  `tenant_id` varchar(20) DEFAULT '000000' COMMENT '租户编号',
+  `tenant_id` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci DEFAULT '000000' COMMENT '租户编号',
   `batch_id` varchar(64) NOT NULL COMMENT '上传批次',
   `file_name` varchar(255) NOT NULL COMMENT '文件名',
   `category` varchar(100) DEFAULT '' COMMENT '目标分类',
diff --git a/backend/script/sql/aihr_model_mysql8.sql b/backend/script/sql/aihr_model_mysql8.sql
index 43bec1c2..02efecbe 100644
--- a/backend/script/sql/aihr_model_mysql8.sql
+++ b/backend/script/sql/aihr_model_mysql8.sql
@@ -3,7 +3,7 @@
 
 CREATE TABLE IF NOT EXISTS `aihr_model_provider` (
   `id` bigint NOT NULL AUTO_INCREMENT COMMENT '主键',
-  `tenant_id` varchar(20) DEFAULT '000000' COMMENT '租户编号',
+  `tenant_id` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci DEFAULT '000000' COMMENT '租户编号',
   `provider_name` varchar(100) NOT NULL COMMENT '供应商名称',
   `provider_code` varchar(50) NOT NULL COMMENT '供应商编码',
   `provider_desc` varchar(500) DEFAULT NULL COMMENT '供应商描述',
@@ -24,7 +24,7 @@ CREATE TABLE IF NOT EXISTS `aihr_model_provider` (
 
 CREATE TABLE IF NOT EXISTS `aihr_model_config` (
   `id` bigint NOT NULL AUTO_INCREMENT COMMENT '主键',
-  `tenant_id` varchar(20) DEFAULT '000000' COMMENT '租户编号',
+  `tenant_id` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci DEFAULT '000000' COMMENT '租户编号',
   `category` varchar(30) NOT NULL COMMENT '模型类型: chat/vector/rerank',
   `model_name` varchar(100) NOT NULL COMMENT '模型名称',
   `provider_code` varchar(50) NOT NULL COMMENT '供应商编码',
diff --git a/backend/script/sql/aihr_org_snapshot_mysql8.sql b/backend/script/sql/aihr_org_snapshot_mysql8.sql
index 4548716a..55d54f7d 100644
--- a/backend/script/sql/aihr_org_snapshot_mysql8.sql
+++ b/backend/script/sql/aihr_org_snapshot_mysql8.sql
@@ -6,7 +6,7 @@
 DROP TABLE IF EXISTS `aihr_org_snapshot`;
 CREATE TABLE `aihr_org_snapshot` (
   `id` bigint NOT NULL AUTO_INCREMENT COMMENT '主键',
-  `tenant_id` varchar(20) DEFAULT '000000' COMMENT '租户编号',
+  `tenant_id` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci DEFAULT '000000' COMMENT '租户编号',
   `project_code` varchar(50) NOT NULL COMMENT '项目编码（数据权限范围主体，D1）',
   `project_name` varchar(100) NOT NULL COMMENT '项目名称',
   `dept_name` varchar(100) DEFAULT NULL COMMENT '部门/条线',
diff --git a/backend/script/sql/aihr_practice_mysql8.sql b/backend/script/sql/aihr_practice_mysql8.sql
index 11c240a4..07a9485a 100644
--- a/backend/script/sql/aihr_practice_mysql8.sql
+++ b/backend/script/sql/aihr_practice_mysql8.sql
@@ -3,7 +3,7 @@
 
 CREATE TABLE IF NOT EXISTS `aihr_case_record` (
   `id` bigint NOT NULL AUTO_INCREMENT COMMENT '主键',
-  `tenant_id` varchar(20) DEFAULT '000000' COMMENT '租户编号',
+  `tenant_id` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci DEFAULT '000000' COMMENT '租户编号',
   `case_id` varchar(80) NOT NULL COMMENT '案例ID',
   `file_name` varchar(255) DEFAULT NULL COMMENT '来源文件',
   `project_ext_org_id` varchar(100) DEFAULT NULL COMMENT '项目外部组织ID',
@@ -26,7 +26,7 @@ CREATE TABLE IF NOT EXISTS `aihr_case_record` (
 
 CREATE TABLE IF NOT EXISTS `aihr_practice_session` (
   `id` bigint NOT NULL AUTO_INCREMENT COMMENT '主键',
-  `tenant_id` varchar(20) DEFAULT '000000' COMMENT '租户编号',
+  `tenant_id` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci DEFAULT '000000' COMMENT '租户编号',
   `session_id` varchar(100) NOT NULL COMMENT '训练会话ID',
   `ext_party_id` varchar(100) DEFAULT NULL COMMENT '外部主体或手机号',
   `trainee_name` varchar(100) DEFAULT NULL COMMENT '学员名称',
@@ -64,7 +64,7 @@ CREATE TABLE IF NOT EXISTS `aihr_practice_session` (
 
 CREATE TABLE IF NOT EXISTS `aihr_practice_annotation` (
   `id` bigint NOT NULL AUTO_INCREMENT COMMENT '主键',
-  `tenant_id` varchar(20) DEFAULT '000000' COMMENT '租户编号',
+  `tenant_id` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci DEFAULT '000000' COMMENT '租户编号',
   `session_id` varchar(100) NOT NULL COMMENT '训练会话ID',
   `turn_index` int NOT NULL COMMENT '话术序号',
   `source_text` varchar(1000) DEFAULT NULL COMMENT '原话',
@@ -80,7 +80,7 @@ CREATE TABLE IF NOT EXISTS `aihr_practice_annotation` (
 
 CREATE TABLE IF NOT EXISTS `aihr_practice_audio` (
   `id` bigint NOT NULL AUTO_INCREMENT COMMENT '主键',
-  `tenant_id` varchar(20) DEFAULT '000000' COMMENT '租户编号',
+  `tenant_id` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci DEFAULT '000000' COMMENT '租户编号',
   `session_id` varchar(100) NOT NULL COMMENT '训练会话ID',
   `turn_index` int NOT NULL COMMENT '话术序号',
   `role` varchar(30) NOT NULL COMMENT '音频角色',
@@ -95,7 +95,7 @@ CREATE TABLE IF NOT EXISTS `aihr_practice_audio` (
 
 CREATE TABLE IF NOT EXISTS `aihr_practice_audio_upload` (
   `id` bigint NOT NULL AUTO_INCREMENT COMMENT '主键',
-  `tenant_id` varchar(20) DEFAULT '000000' COMMENT '租户编号',
+  `tenant_id` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci DEFAULT '000000' COMMENT '租户编号',
   `oss_id` bigint NOT NULL COMMENT 'OSS文件ID',
   `owner_user_id` bigint NOT NULL COMMENT '上传用户ID',
   `owner_identity` varchar(100) NOT NULL COMMENT '上传主体',
@@ -111,7 +111,7 @@ CREATE TABLE IF NOT EXISTS `aihr_practice_audio_upload` (
 
 CREATE TABLE IF NOT EXISTS `aihr_practice_assignment` (
   `id` bigint NOT NULL AUTO_INCREMENT COMMENT '主键',
-  `tenant_id` varchar(20) DEFAULT '000000' COMMENT '租户编号',
+  `tenant_id` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci DEFAULT '000000' COMMENT '租户编号',
   `ext_party_id` varchar(100) NOT NULL COMMENT '员工外部主体或手机号',
   `trainee_name` varchar(100) DEFAULT NULL COMMENT '员工姓名',
   `scenario_id` varchar(80) NOT NULL COMMENT '场景ID',
@@ -136,7 +136,7 @@ CREATE TABLE IF NOT EXISTS `aihr_practice_assignment` (
 
 CREATE TABLE IF NOT EXISTS `aihr_practice_calibration` (
   `id` bigint NOT NULL AUTO_INCREMENT COMMENT '主键',
-  `tenant_id` varchar(20) DEFAULT '000000' COMMENT '租户编号',
+  `tenant_id` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci DEFAULT '000000' COMMENT '租户编号',
   `session_id` varchar(100) NOT NULL COMMENT '训练会话ID',
   `reviewer` varchar(100) DEFAULT NULL COMMENT '校准人',
   `original_score` int DEFAULT NULL COMMENT 'AI原始总分',
@@ -152,7 +152,7 @@ CREATE TABLE IF NOT EXISTS `aihr_practice_calibration` (
 
 CREATE TABLE IF NOT EXISTS `aihr_practice_scenario` (
   `id` bigint NOT NULL AUTO_INCREMENT COMMENT '主键',
-  `tenant_id` varchar(20) DEFAULT '000000' COMMENT '租户编号',
+  `tenant_id` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci DEFAULT '000000' COMMENT '租户编号',
   `scenario_code` varchar(80) NOT NULL COMMENT '场景编码',
   `scenario_name` varchar(100) NOT NULL COMMENT '场景名称',
   `position` varchar(80) NOT NULL COMMENT '岗位',
@@ -184,7 +184,7 @@ CREATE TABLE IF NOT EXISTS `aihr_practice_scenario` (
 
 CREATE TABLE IF NOT EXISTS `aihr_practice_rubric` (
   `id` bigint NOT NULL AUTO_INCREMENT COMMENT '主键',
-  `tenant_id` varchar(20) DEFAULT '000000' COMMENT '租户编号',
+  `tenant_id` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci DEFAULT '000000' COMMENT '租户编号',
   `rubric_code` varchar(100) NOT NULL COMMENT 'Rubric编码',
   `scenario_code` varchar(80) NOT NULL COMMENT '场景编码',
   `rubric_name` varchar(100) NOT NULL COMMENT 'Rubric名称',
@@ -200,7 +200,7 @@ CREATE TABLE IF NOT EXISTS `aihr_practice_rubric` (
 
 CREATE TABLE IF NOT EXISTS `aihr_practice_rubric_dimension` (
   `id` bigint NOT NULL AUTO_INCREMENT COMMENT '主键',
-  `tenant_id` varchar(20) DEFAULT '000000' COMMENT '租户编号',
+  `tenant_id` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci DEFAULT '000000' COMMENT '租户编号',
   `rubric_code` varchar(100) NOT NULL COMMENT 'Rubric编码',
   `dimension_code` varchar(50) NOT NULL COMMENT '维度编码',
   `dimension_name` varchar(50) NOT NULL COMMENT '维度名称',
@@ -216,7 +216,7 @@ CREATE TABLE IF NOT EXISTS `aihr_practice_rubric_dimension` (
 
 CREATE TABLE IF NOT EXISTS `aihr_prompt_template` (
   `id` bigint NOT NULL AUTO_INCREMENT COMMENT '主键',
-  `tenant_id` varchar(20) DEFAULT '000000' COMMENT '租户编号',
+  `tenant_id` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci DEFAULT '000000' COMMENT '租户编号',
   `code` varchar(80) NOT NULL COMMENT '模板编码',
   `name` varchar(100) NOT NULL COMMENT '模板名称',
   `category` varchar(50) NOT NULL COMMENT '业务分类',
@@ -236,7 +236,7 @@ CREATE TABLE IF NOT EXISTS `aihr_prompt_template` (
 
 CREATE TABLE IF NOT EXISTS `aihr_knowledge_gap` (
   `id` bigint NOT NULL AUTO_INCREMENT COMMENT '主键',
-  `tenant_id` varchar(20) DEFAULT '000000' COMMENT '租户编号',
+  `tenant_id` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci DEFAULT '000000' COMMENT '租户编号',
   `query_text` varchar(1000) NOT NULL COMMENT '未命中问题',
   `category` varchar(100) DEFAULT NULL COMMENT '知识分类',
   `position` varchar(80) DEFAULT NULL COMMENT '岗位',
@@ -249,7 +249,7 @@ CREATE TABLE IF NOT EXISTS `aihr_knowledge_gap` (
 
 CREATE TABLE IF NOT EXISTS `aihr_sop_answer_review` (
   `id` bigint NOT NULL AUTO_INCREMENT COMMENT '主键',
-  `tenant_id` varchar(20) DEFAULT '000000' COMMENT '租户编号',
+  `tenant_id` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci DEFAULT '000000' COMMENT '租户编号',
   `query_text` varchar(1000) NOT NULL COMMENT '问题',
   `category` varchar(100) DEFAULT NULL COMMENT '知识分类',
   `answer_text` varchar(2000) DEFAULT NULL COMMENT '回答',
@@ -271,7 +271,7 @@ CREATE TABLE IF NOT EXISTS `aihr_sop_answer_review` (
 
 CREATE TABLE IF NOT EXISTS `aihr_knowledge_answer_feedback` (
   `id` bigint NOT NULL AUTO_INCREMENT COMMENT '主键',
-  `tenant_id` varchar(20) DEFAULT '000000' COMMENT '租户编号',
+  `tenant_id` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci DEFAULT '000000' COMMENT '租户编号',
   `query_text` varchar(1000) NOT NULL COMMENT '问题原文',
   `query_norm` varchar(500) NOT NULL COMMENT '规范化问题',
   `fragment_id` bigint NOT NULL COMMENT '知识片段ID',
@@ -468,7 +468,7 @@ ON DUPLICATE KEY UPDATE
 -- 不写入业务数据；与 update/aihr_20260715_position_sop_qualification_mysql8.sql 保持一致。
 CREATE TABLE IF NOT EXISTS `aihr_position_responsibility` (
   `id` bigint NOT NULL AUTO_INCREMENT COMMENT '主键',
-  `tenant_id` varchar(20) NOT NULL DEFAULT '000000' COMMENT '租户编号',
+  `tenant_id` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NOT NULL DEFAULT '000000' COMMENT '租户编号',
   `position_code` varchar(80) NOT NULL COMMENT '岗位编码',
   `responsibility_text` varchar(1000) NOT NULL COMMENT '岗位职责',
   `sop_id` bigint DEFAULT NULL COMMENT '关联SOP主键（跨模块引用）',
@@ -485,7 +485,7 @@ CREATE TABLE IF NOT EXISTS `aihr_position_responsibility` (
 
 CREATE TABLE IF NOT EXISTS `aihr_sop_applicability` (
   `id` bigint NOT NULL AUTO_INCREMENT COMMENT '主键',
-  `tenant_id` varchar(20) NOT NULL DEFAULT '000000' COMMENT '租户编号',
+  `tenant_id` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NOT NULL DEFAULT '000000' COMMENT '租户编号',
   `sop_id` bigint DEFAULT NULL COMMENT '关联SOP主键（跨模块引用）',
   `sop_code` varchar(100) DEFAULT NULL COMMENT '关联SOP编码',
   `project_type` varchar(80) DEFAULT NULL COMMENT '项目类型：住宅/公建/景区等',
@@ -503,7 +503,7 @@ CREATE TABLE IF NOT EXISTS `aihr_sop_applicability` (
 
 CREATE TABLE IF NOT EXISTS `aihr_onboard_task` (
   `id` bigint NOT NULL AUTO_INCREMENT COMMENT '主键',
-  `tenant_id` varchar(20) NOT NULL DEFAULT '000000' COMMENT '租户编号',
+  `tenant_id` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NOT NULL DEFAULT '000000' COMMENT '租户编号',
   `ext_party_id` varchar(100) NOT NULL COMMENT '员工外部主体ID，不复制姓名',
   `project_code` varchar(100) DEFAULT NULL COMMENT '项目编码',
   `position_code` varchar(80) DEFAULT NULL COMMENT '岗位编码',
@@ -525,7 +525,7 @@ CREATE TABLE IF NOT EXISTS `aihr_onboard_task` (
 
 CREATE TABLE IF NOT EXISTS `aihr_qualification_gate` (
   `id` bigint NOT NULL AUTO_INCREMENT COMMENT '主键',
-  `tenant_id` varchar(20) NOT NULL DEFAULT '000000' COMMENT '租户编号',
+  `tenant_id` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NOT NULL DEFAULT '000000' COMMENT '租户编号',
   `ext_party_id` varchar(100) NOT NULL COMMENT '员工外部主体ID，不复制姓名',
   `project_code` varchar(100) DEFAULT NULL COMMENT '项目编码',
   `position_code` varchar(80) NOT NULL COMMENT '岗位编码',
diff --git a/backend/script/sql/update/aihr_20260714_practice_catalog_schema_mysql8.sql b/backend/script/sql/update/aihr_20260714_practice_catalog_schema_mysql8.sql
index 3e0d7ec3..71232239 100644
--- a/backend/script/sql/update/aihr_20260714_practice_catalog_schema_mysql8.sql
+++ b/backend/script/sql/update/aihr_20260714_practice_catalog_schema_mysql8.sql
@@ -3,7 +3,7 @@
 
 CREATE TABLE IF NOT EXISTS `aihr_practice_scenario` (
   `id` bigint NOT NULL AUTO_INCREMENT COMMENT '主键',
-  `tenant_id` varchar(20) DEFAULT '000000' COMMENT '租户编号',
+  `tenant_id` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci DEFAULT '000000' COMMENT '租户编号',
   `scenario_code` varchar(80) NOT NULL COMMENT '场景编码',
   `scenario_name` varchar(100) NOT NULL COMMENT '场景名称',
   `position` varchar(80) NOT NULL COMMENT '岗位',
@@ -35,7 +35,7 @@ CREATE TABLE IF NOT EXISTS `aihr_practice_scenario` (
 
 CREATE TABLE IF NOT EXISTS `aihr_practice_rubric` (
   `id` bigint NOT NULL AUTO_INCREMENT COMMENT '主键',
-  `tenant_id` varchar(20) DEFAULT '000000' COMMENT '租户编号',
+  `tenant_id` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci DEFAULT '000000' COMMENT '租户编号',
   `rubric_code` varchar(100) NOT NULL COMMENT 'Rubric编码',
   `scenario_code` varchar(80) NOT NULL COMMENT '场景编码',
   `rubric_name` varchar(100) NOT NULL COMMENT 'Rubric名称',
@@ -51,7 +51,7 @@ CREATE TABLE IF NOT EXISTS `aihr_practice_rubric` (
 
 CREATE TABLE IF NOT EXISTS `aihr_practice_rubric_dimension` (
   `id` bigint NOT NULL AUTO_INCREMENT COMMENT '主键',
-  `tenant_id` varchar(20) DEFAULT '000000' COMMENT '租户编号',
+  `tenant_id` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci DEFAULT '000000' COMMENT '租户编号',
   `rubric_code` varchar(100) NOT NULL COMMENT 'Rubric编码',
   `dimension_code` varchar(50) NOT NULL COMMENT '维度编码',
   `dimension_name` varchar(50) NOT NULL COMMENT '维度名称',
diff --git a/backend/script/sql/update/aihr_20260714_practice_evidence_mysql8.sql b/backend/script/sql/update/aihr_20260714_practice_evidence_mysql8.sql
index 4d03cfba..24af9e65 100644
--- a/backend/script/sql/update/aihr_20260714_practice_evidence_mysql8.sql
+++ b/backend/script/sql/update/aihr_20260714_practice_evidence_mysql8.sql
@@ -3,7 +3,7 @@
 
 CREATE TABLE IF NOT EXISTS `aihr_practice_audio` (
   `id` bigint NOT NULL AUTO_INCREMENT COMMENT '主键',
-  `tenant_id` varchar(20) DEFAULT '000000' COMMENT '租户编号',
+  `tenant_id` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci DEFAULT '000000' COMMENT '租户编号',
   `session_id` varchar(100) NOT NULL COMMENT '训练会话ID',
   `turn_index` int NOT NULL COMMENT '话术序号',
   `role` varchar(30) NOT NULL COMMENT '音频角色',
@@ -18,7 +18,7 @@ CREATE TABLE IF NOT EXISTS `aihr_practice_audio` (
 
 CREATE TABLE IF NOT EXISTS `aihr_practice_audio_upload` (
   `id` bigint NOT NULL AUTO_INCREMENT COMMENT '主键',
-  `tenant_id` varchar(20) DEFAULT '000000' COMMENT '租户编号',
+  `tenant_id` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci DEFAULT '000000' COMMENT '租户编号',
   `oss_id` bigint NOT NULL COMMENT 'OSS文件ID',
   `owner_user_id` bigint NOT NULL COMMENT '上传用户ID',
   `owner_identity` varchar(100) NOT NULL COMMENT '上传主体',
@@ -34,7 +34,7 @@ CREATE TABLE IF NOT EXISTS `aihr_practice_audio_upload` (
 
 CREATE TABLE IF NOT EXISTS `aihr_practice_calibration` (
   `id` bigint NOT NULL AUTO_INCREMENT COMMENT '主键',
-  `tenant_id` varchar(20) DEFAULT '000000' COMMENT '租户编号',
+  `tenant_id` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci DEFAULT '000000' COMMENT '租户编号',
   `session_id` varchar(100) NOT NULL COMMENT '训练会话ID',
   `reviewer` varchar(100) DEFAULT NULL COMMENT '校准人',
   `original_score` int DEFAULT NULL COMMENT 'AI原始总分',
diff --git a/backend/script/sql/update/aihr_20260714_practice_five_dimensions_mysql8.sql b/backend/script/sql/update/aihr_20260714_practice_five_dimensions_mysql8.sql
index 1e9e944c..fbc73112 100644
--- a/backend/script/sql/update/aihr_20260714_practice_five_dimensions_mysql8.sql
+++ b/backend/script/sql/update/aihr_20260714_practice_five_dimensions_mysql8.sql
@@ -57,7 +57,7 @@ EXECUTE aihr_response_latency_stmt;
 DEALLOCATE PREPARE aihr_response_latency_stmt;
 
 CREATE TEMPORARY TABLE IF NOT EXISTS aihr_brd_rubric_codes (
-  tenant_id varchar(20) NOT NULL,
+  tenant_id varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NOT NULL,
   rubric_code varchar(100) NOT NULL,
   PRIMARY KEY (tenant_id, rubric_code)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci;
diff --git a/backend/script/sql/update/aihr_20260715_candidate_interview_review_mysql8.sql b/backend/script/sql/update/aihr_20260715_candidate_interview_review_mysql8.sql
index 06ec6ab0..807f5dd0 100644
--- a/backend/script/sql/update/aihr_20260715_candidate_interview_review_mysql8.sql
+++ b/backend/script/sql/update/aihr_20260715_candidate_interview_review_mysql8.sql
@@ -3,7 +3,7 @@
 
 CREATE TABLE IF NOT EXISTS `aihr_candidate_material` (
   `id` bigint NOT NULL AUTO_INCREMENT COMMENT '主键',
-  `tenant_id` varchar(20) DEFAULT '000000' COMMENT '租户编号',
+  `tenant_id` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci DEFAULT '000000' COMMENT '租户编号',
   `candidate_id` varchar(80) NOT NULL COMMENT '候选人外部ID',
   `candidate_name` varchar(100) DEFAULT NULL COMMENT '候选人姓名',
   `material_type` varchar(50) DEFAULT NULL COMMENT '资料类型',
@@ -56,7 +56,7 @@ DEALLOCATE PREPARE aihr_candidate_material_reviewed_time_stmt;
 
 CREATE TABLE IF NOT EXISTS `aihr_interview_result` (
   `id` bigint NOT NULL AUTO_INCREMENT COMMENT '主键',
-  `tenant_id` varchar(20) DEFAULT '000000' COMMENT '租户编号',
+  `tenant_id` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci DEFAULT '000000' COMMENT '租户编号',
   `session_id` varchar(100) NOT NULL COMMENT '面试会话ID',
   `candidate_id` varchar(80) DEFAULT NULL COMMENT '候选人ID',
   `candidate_name` varchar(100) DEFAULT NULL COMMENT '候选人姓名',
@@ -182,7 +182,7 @@ DEALLOCATE PREPARE aihr_interview_reviewed_time_stmt;
 
 CREATE TABLE IF NOT EXISTS `aihr_candidate_employee_link` (
   `id` bigint NOT NULL AUTO_INCREMENT COMMENT '主键',
-  `tenant_id` varchar(20) DEFAULT '000000' COMMENT '租户编号',
+  `tenant_id` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci DEFAULT '000000' COMMENT '租户编号',
   `candidate_id` varchar(80) NOT NULL COMMENT '本地候选人ID',
   `ext_party_id` varchar(100) NOT NULL COMMENT '外部员工主体ID',
   `status` varchar(20) DEFAULT '已关联' COMMENT '关联状态',
diff --git a/backend/script/sql/update/aihr_20260715_knowledge_feedback_mysql8.sql b/backend/script/sql/update/aihr_20260715_knowledge_feedback_mysql8.sql
index 715b6fa3..d958e8bd 100644
--- a/backend/script/sql/update/aihr_20260715_knowledge_feedback_mysql8.sql
+++ b/backend/script/sql/update/aihr_20260715_knowledge_feedback_mysql8.sql
@@ -3,7 +3,7 @@
 
 CREATE TABLE IF NOT EXISTS `aihr_knowledge_gap` (
   `id` bigint NOT NULL AUTO_INCREMENT COMMENT '主键',
-  `tenant_id` varchar(20) DEFAULT '000000' COMMENT '租户编号',
+  `tenant_id` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci DEFAULT '000000' COMMENT '租户编号',
   `query_text` varchar(1000) NOT NULL COMMENT '未命中问题',
   `category` varchar(100) DEFAULT NULL COMMENT '知识分类',
   `position` varchar(80) DEFAULT NULL COMMENT '岗位',
@@ -16,7 +16,7 @@ CREATE TABLE IF NOT EXISTS `aihr_knowledge_gap` (
 
 CREATE TABLE IF NOT EXISTS `aihr_knowledge_answer_feedback` (
   `id` bigint NOT NULL AUTO_INCREMENT COMMENT '主键',
-  `tenant_id` varchar(20) DEFAULT '000000' COMMENT '租户编号',
+  `tenant_id` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci DEFAULT '000000' COMMENT '租户编号',
   `query_text` varchar(1000) NOT NULL COMMENT '问题原文',
   `query_norm` varchar(500) NOT NULL COMMENT '规范化问题',
   `fragment_id` bigint NOT NULL COMMENT '知识片段ID',
diff --git a/backend/script/sql/update/aihr_20260715_position_sop_qualification_mysql8.sql b/backend/script/sql/update/aihr_20260715_position_sop_qualification_mysql8.sql
index a344e8f1..d17efab6 100644
--- a/backend/script/sql/update/aihr_20260715_position_sop_qualification_mysql8.sql
+++ b/backend/script/sql/update/aihr_20260715_position_sop_qualification_mysql8.sql
@@ -4,7 +4,7 @@
 
 CREATE TABLE IF NOT EXISTS `aihr_position_responsibility` (
   `id` bigint NOT NULL AUTO_INCREMENT COMMENT '主键',
-  `tenant_id` varchar(20) NOT NULL DEFAULT '000000' COMMENT '租户编号',
+  `tenant_id` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NOT NULL DEFAULT '000000' COMMENT '租户编号',
   `position_code` varchar(80) NOT NULL COMMENT '岗位编码',
   `responsibility_text` varchar(1000) NOT NULL COMMENT '岗位职责',
   `sop_id` bigint DEFAULT NULL COMMENT '关联SOP主键（跨模块引用）',
@@ -21,7 +21,7 @@ CREATE TABLE IF NOT EXISTS `aihr_position_responsibility` (
 
 CREATE TABLE IF NOT EXISTS `aihr_sop_applicability` (
   `id` bigint NOT NULL AUTO_INCREMENT COMMENT '主键',
-  `tenant_id` varchar(20) NOT NULL DEFAULT '000000' COMMENT '租户编号',
+  `tenant_id` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NOT NULL DEFAULT '000000' COMMENT '租户编号',
   `sop_id` bigint DEFAULT NULL COMMENT '关联SOP主键（跨模块引用）',
   `sop_code` varchar(100) DEFAULT NULL COMMENT '关联SOP编码',
   `project_type` varchar(80) DEFAULT NULL COMMENT '项目类型：住宅/公建/景区等',
@@ -39,7 +39,7 @@ CREATE TABLE IF NOT EXISTS `aihr_sop_applicability` (
 
 CREATE TABLE IF NOT EXISTS `aihr_onboard_task` (
   `id` bigint NOT NULL AUTO_INCREMENT COMMENT '主键',
-  `tenant_id` varchar(20) NOT NULL DEFAULT '000000' COMMENT '租户编号',
+  `tenant_id` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NOT NULL DEFAULT '000000' COMMENT '租户编号',
   `ext_party_id` varchar(100) NOT NULL COMMENT '员工外部主体ID，不复制姓名',
   `project_code` varchar(100) DEFAULT NULL COMMENT '项目编码',
   `position_code` varchar(80) DEFAULT NULL COMMENT '岗位编码',
@@ -61,7 +61,7 @@ CREATE TABLE IF NOT EXISTS `aihr_onboard_task` (
 
 CREATE TABLE IF NOT EXISTS `aihr_qualification_gate` (
   `id` bigint NOT NULL AUTO_INCREMENT COMMENT '主键',
-  `tenant_id` varchar(20) NOT NULL DEFAULT '000000' COMMENT '租户编号',
+  `tenant_id` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NOT NULL DEFAULT '000000' COMMENT '租户编号',
   `ext_party_id` varchar(100) NOT NULL COMMENT '员工外部主体ID，不复制姓名',
   `project_code` varchar(100) DEFAULT NULL COMMENT '项目编码',
   `position_code` varchar(80) NOT NULL COMMENT '岗位编码',
diff --git a/backend/script/sql/update/aihr_20260715_tenant_collation_mysql8.sql b/backend/script/sql/update/aihr_20260715_tenant_collation_mysql8.sql
new file mode 100644
index 00000000..c6c4e2ce
--- /dev/null
+++ b/backend/script/sql/update/aihr_20260715_tenant_collation_mysql8.sql
@@ -0,0 +1,70 @@
+-- Keep AIHR tenant identifiers compatible with the framework tenant contract.
+-- This migration derives the target charset/collation from sys_oss.tenant_id,
+-- preserves each AIHR tenant_id column's nullability/default/comment, and is idempotent.
+
+DROP PROCEDURE IF EXISTS aihr_align_tenant_collation;
+
+DELIMITER $$
+
+CREATE PROCEDURE aihr_align_tenant_collation()
+BEGIN
+  DECLARE done int DEFAULT 0;
+  DECLARE target_charset varchar(64);
+  DECLARE target_collation varchar(64);
+  DECLARE current_table varchar(64);
+  DECLARE current_type text;
+  DECLARE current_nullable varchar(3);
+  DECLARE current_default text;
+  DECLARE current_comment text;
+
+  DECLARE tenant_columns CURSOR FOR
+    SELECT table_name, column_type, is_nullable, column_default, column_comment
+      FROM information_schema.columns
+     WHERE table_schema = DATABASE()
+       AND LEFT(table_name, 5) = 'aihr_'
+       AND column_name = 'tenant_id'
+       AND collation_name <> target_collation
+     ORDER BY table_name;
+  DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = 1;
+
+  SELECT character_set_name, collation_name
+    INTO target_charset, target_collation
+    FROM information_schema.columns
+   WHERE table_schema = DATABASE()
+     AND table_name = 'sys_oss'
+     AND column_name = 'tenant_id'
+   LIMIT 1;
+
+  IF target_charset IS NULL OR target_collation IS NULL THEN
+    SIGNAL SQLSTATE '45000'
+      SET MESSAGE_TEXT = 'sys_oss.tenant_id charset/collation contract is missing';
+  END IF;
+
+  OPEN tenant_columns;
+  align_loop: LOOP
+    FETCH tenant_columns
+      INTO current_table, current_type, current_nullable, current_default, current_comment;
+    IF done = 1 THEN
+      LEAVE align_loop;
+    END IF;
+
+    SET @aihr_tenant_ddl = CONCAT(
+      'ALTER TABLE `', REPLACE(current_table, '`', '``'),
+      '` MODIFY COLUMN `tenant_id` ', current_type,
+      ' CHARACTER SET `', REPLACE(target_charset, '`', '``'),
+      '` COLLATE `', REPLACE(target_collation, '`', '``'), '`',
+      IF(current_nullable = 'YES', ' NULL', ' NOT NULL'),
+      IF(current_default IS NULL, '', CONCAT(' DEFAULT ', QUOTE(current_default))),
+      ' COMMENT ', QUOTE(COALESCE(current_comment, ''))
+    );
+    PREPARE aihr_tenant_statement FROM @aihr_tenant_ddl;
+    EXECUTE aihr_tenant_statement;
+    DEALLOCATE PREPARE aihr_tenant_statement;
+  END LOOP;
+  CLOSE tenant_columns;
+END$$
+
+DELIMITER ;
+
+CALL aihr_align_tenant_collation();
+DROP PROCEDURE aihr_align_tenant_collation;
diff --git a/docs/BRD_PRODUCTION_MIGRATION_RUNBOOK.md b/docs/BRD_PRODUCTION_MIGRATION_RUNBOOK.md
index a6c1d515..cf00597b 100644
--- a/docs/BRD_PRODUCTION_MIGRATION_RUNBOOK.md
+++ b/docs/BRD_PRODUCTION_MIGRATION_RUNBOOK.md
@@ -11,12 +11,13 @@
 - 对练五维、每日三题评分模式、SOP 提问主体/版本、组织入职日期字段尚未全部迁移；
 - `aihr_prompt_template` 表存在，但内置模板数量为 `0`；
 - `aihr_candidate_material` 缺少 `reviewer/reviewed_time`，`aihr_interview_result` 缺少人工复核字段和 `questions_json`，`aihr_candidate_employee_link` 尚不存在；这些候选人/HR 复核链路不能依赖首次请求触发懒迁移；
+- AIHR 表的 `tenant_id` 曾使用 `utf8mb4_0900_ai_ci`，框架 `sys_oss.tenant_id` 使用 `utf8mb4_general_ci`；跨模块等值连接会报 `Illegal mix of collations`，不能靠查询吞错或单次 `binary` 兼容长期掩盖；
 - 这些事实不能由应用启动时的懒迁移或页面 fallback 代替。
 
 ## 发布前置条件
 
 1. 确认发布窗口、DB 备份和回滚负责人；迁移脚本包含 `ALTER TABLE`，不能在无备份状态执行。
-2. 先执行 `scripts/release-preflight.sh` 的只读检查；生产静态资源、后端包和当前提交必须一致。若要同时核对线上结构，追加 `RELEASE_VERIFY_REMOTE_SCHEMA=true`，该开关只读检查必需表，不执行迁移。
+2. 先执行 `scripts/release-preflight.sh` 的本地产物检查。生产迁移后、后端发布完成后，必须追加 `RELEASE_VERIFY_REMOTE_SCHEMA=true RELEASE_VERIFY_REMOTE_BACKEND=true` 再做线上核验；该门禁会检查必需表、所有 AIHR `tenant_id` 与 `sys_oss.tenant_id` 的排序规则，以及资料处理实际连接 SQL。
 3. 确认迁移目标库、租户和字符集为 MySQL 8 / `utf8mb4`；脚本只允许在目标业务库执行。
 4. 生产组织同步凭据、AI 供应商留存/费用口径和正式试点窗口仍未闭合时，不要把迁移完成宣称为 BRD 验收完成。
 
@@ -40,9 +41,10 @@ mysql --default-character-set=utf8mb4 "$DB_NAME" < backend/script/sql/update/aih
 mysql --default-character-set=utf8mb4 "$DB_NAME" < backend/script/sql/update/aihr_20260715_knowledge_feedback_mysql8.sql
 mysql --default-character-set=utf8mb4 "$DB_NAME" < backend/script/sql/update/aihr_20260714_org_hire_date_mysql8.sql
 mysql --default-character-set=utf8mb4 "$DB_NAME" < backend/script/sql/update/aihr_20260715_position_sop_qualification_mysql8.sql
+mysql --default-character-set=utf8mb4 "$DB_NAME" < backend/script/sql/update/aihr_20260715_tenant_collation_mysql8.sql
 ```
 
-顺序原因：场景补充依赖三张场景/Rubric 基础表；五维迁移依赖场景和 Rubric；岗位/SOP/任务/资格迁移只补正式数据契约，不写业务行，也不代表岗位适用范围、任务规则或资格标准已经获得 HR 确认。住宅 SOP 和 Prompt 迁移只补内置内容，不代表内容已完成业务复核。
+顺序原因：场景补充依赖三张场景/Rubric 基础表；五维迁移依赖场景和 Rubric；租户排序规则迁移必须最后执行，以覆盖本批次新建的所有 AIHR 表。岗位/SOP/任务/资格迁移只补正式数据契约，不写业务行，也不代表岗位适用范围、任务规则或资格标准已经获得 HR 确认。住宅 SOP 和 Prompt 迁移只补内置内容，不代表内容已完成业务复核。
 
 ## 迁移后只读核验
 
@@ -84,9 +86,20 @@ SELECT COUNT(*) AS built_in_prompt_templates
 FROM aihr_prompt_template
 WHERE tenant_id = '000000'
   AND code IN ('summary_card', 'sop_answer', 'mentor_rewrite', 'review_annotation', 'prep_card', 'supervision_image_analysis_maintenance');
+
+SELECT aihr.table_name, aihr.collation_name, core.collation_name AS expected_collation
+FROM information_schema.columns aihr
+JOIN information_schema.columns core
+  ON core.table_schema = aihr.table_schema
+ AND core.table_name = 'sys_oss'
+ AND core.column_name = 'tenant_id'
+WHERE aihr.table_schema = DATABASE()
+  AND LEFT(aihr.table_name, 5) = 'aihr_'
+  AND aihr.column_name = 'tenant_id'
+  AND aihr.collation_name <> core.collation_name;
 ```
 
-预期是三张场景/Rubric 表、三张证据表、两张知识治理表、三张候选人/面试表和四张岗位/SOP/任务/资格契约表均存在，会话证据字段为 `8/8`，候选资料审核字段为 `2/2`，面试复核字段为 `6/6`，字段查询覆盖所有列，内置 Prompt 数量为 `6`。岗位/SOP/任务/资格表为空是允许的；这只证明 schema/seed 迁移完成，不证明正式岗位规则、资格 gating 或试点完成。
+预期是三张场景/Rubric 表、三张证据表、两张知识治理表、三张候选人/面试表和四张岗位/SOP/任务/资格契约表均存在，会话证据字段为 `8/8`，候选资料审核字段为 `2/2`，面试复核字段为 `6/6`，字段查询覆盖所有列，内置 Prompt 数量为 `6`，排序规则差异查询返回 `0` 行。岗位/SOP/任务/资格表为空是允许的；这只证明 schema/seed 迁移完成，不证明正式岗位规则、资格 gating 或试点完成。
 
 ## 迁移后应用回归
 
diff --git a/docs/DEV_SETUP.md b/docs/DEV_SETUP.md
index 84d92a31..ff11791d 100644
--- a/docs/DEV_SETUP.md
+++ b/docs/DEV_SETUP.md
@@ -169,11 +169,11 @@ curl -k -s https://peilian.njzhmj.top/h5/ | sed -n '1,20p'
 RELEASE_REMOTE_URL=https://peilian.njzhmj.top ./scripts/release-preflight.sh
 # 发布后核验线上主资源是否与当前本地产物一致
 RELEASE_REMOTE_URL=https://peilian.njzhmj.top RELEASE_VERIFY_REMOTE_MATCH=true ./scripts/release-preflight.sh
-# 同时通过 SSH 校验线上后端 jar；默认使用本机 SSH alias YCWY；比较 ruoyi-aihr 模块内容，避免 ZIP 打包时间戳造成误报
-RELEASE_REMOTE_URL=https://peilian.njzhmj.top RELEASE_VERIFY_REMOTE_MATCH=true RELEASE_VERIFY_REMOTE_BACKEND=true ./scripts/release-preflight.sh
+# 同时校验线上 schema、资料处理连接 SQL 与后端 jar；后端发布验收不得省略 schema 门禁
+RELEASE_REMOTE_URL=https://peilian.njzhmj.top RELEASE_VERIFY_REMOTE_MATCH=true RELEASE_VERIFY_REMOTE_SCHEMA=true RELEASE_VERIFY_REMOTE_BACKEND=true ./scripts/release-preflight.sh
 ```
 
-`RELEASE_VERIFY_REMOTE_BACKEND=true` 必须与 `RELEASE_VERIFY_REMOTE_MATCH=true` 同时使用；预检会同时打印整包 jar SHA-256 和 `ruoyi-aihr` 模块内容 SHA-256，实际匹配以模块内容 hash 为准。远端后端默认核对 `/opt/wygj/app/ruoyi-admin.jar`，如发布路径不同可通过 `RELEASE_REMOTE_BACKEND_PATH` 覆盖；路径必须是安全的绝对路径。
+`RELEASE_VERIFY_REMOTE_BACKEND=true` 必须与 `RELEASE_VERIFY_REMOTE_MATCH=true`、`RELEASE_VERIFY_REMOTE_SCHEMA=true` 同时使用；预检会同时打印整包 jar SHA-256 和 `ruoyi-aihr` 模块内容 SHA-256，实际匹配以模块内容 hash 为准。schema 门禁会拒绝 AIHR 与框架租户字段排序规则不一致，并执行资料处理页依赖的 `aihr_knowledge_attach`/`sys_oss` 连接检查。远端后端默认核对 `/opt/wygj/app/ruoyi-admin.jar`，如发布路径不同可通过 `RELEASE_REMOTE_BACKEND_PATH` 覆盖；路径必须是安全的绝对路径。
 
 带 `RELEASE_REMOTE_URL` 时，预检同时校验租户接口 JSON 的业务 `code=200`；HTTP 200 但业务返回 401/405 会判定失败。
 
diff --git a/scripts/release-preflight.sh b/scripts/release-preflight.sh
index 8de90123..d04fac0a 100755
--- a/scripts/release-preflight.sh
+++ b/scripts/release-preflight.sh
@@ -68,6 +68,9 @@ grep -q '/h5/' "$mobile_index" || fail "mobile H5 index does not contain the /h5
 if [[ "${RELEASE_VERIFY_REMOTE_BACKEND:-false}" == "true" && "${RELEASE_VERIFY_REMOTE_MATCH:-false}" != "true" ]]; then
   fail "RELEASE_VERIFY_REMOTE_BACKEND=true requires RELEASE_VERIFY_REMOTE_MATCH=true"
 fi
+if [[ "${RELEASE_VERIFY_REMOTE_BACKEND:-false}" == "true" && "${RELEASE_VERIFY_REMOTE_SCHEMA:-false}" != "true" ]]; then
+  fail "RELEASE_VERIFY_REMOTE_BACKEND=true requires RELEASE_VERIFY_REMOTE_SCHEMA=true"
+fi
 if [[ "${RELEASE_VERIFY_REMOTE_SCHEMA:-false}" == "true" && "${RELEASE_VERIFY_REMOTE_MATCH:-false}" != "true" ]]; then
   fail "RELEASE_VERIFY_REMOTE_SCHEMA=true requires RELEASE_VERIFY_REMOTE_MATCH=true"
 fi
@@ -111,12 +114,12 @@ require_remote_schema() {
   local remote_db="${RELEASE_REMOTE_DB_NAME:-ry-vue}"
   [[ "$remote_db" =~ ^[A-Za-z0-9_-]+$ ]] || fail "remote database name is invalid: $remote_db"
 
-  local missing
-  missing="$(ssh -o BatchMode=yes -o ConnectTimeout=10 "$remote_ssh" bash -s -- "$remote_db" <<'REMOTE'
+  local issues
+  issues="$(ssh -o BatchMode=yes -o ConnectTimeout=10 "$remote_ssh" bash -s -- "$remote_db" <<'REMOTE'
 set -euo pipefail
 db="$1"
 mysql --batch --skip-column-names --connect-timeout=5 "$db" <<'SQL'
-SELECT required.table_name
+SELECT CONCAT('missing_table:', required.table_name) AS issue
 FROM (
   SELECT 'aihr_prompt_template' AS table_name
   UNION ALL SELECT 'aihr_practice_scenario'
@@ -138,13 +141,54 @@ FROM (
 LEFT JOIN information_schema.tables actual
   ON actual.table_schema = DATABASE() AND actual.table_name = required.table_name
 WHERE actual.table_name IS NULL
-ORDER BY required.table_name;
+UNION ALL
+SELECT 'missing_column:sys_oss.tenant_id'
+WHERE NOT EXISTS (
+  SELECT 1
+  FROM information_schema.columns
+  WHERE table_schema = DATABASE()
+    AND table_name = 'sys_oss'
+    AND column_name = 'tenant_id'
+)
+UNION ALL
+SELECT CONCAT(
+  'tenant_collation:', aihr.table_name, '.', aihr.column_name,
+  '=', COALESCE(aihr.collation_name, 'NULL'),
+  ',expected=', core.collation_name
+)
+FROM information_schema.columns aihr
+JOIN information_schema.columns core
+  ON core.table_schema = aihr.table_schema
+ AND core.table_name = 'sys_oss'
+ AND core.column_name = 'tenant_id'
+WHERE aihr.table_schema = DATABASE()
+  AND LEFT(aihr.table_name, 5) = 'aihr_'
+  AND aihr.column_name = 'tenant_id'
+  AND aihr.collation_name <> core.collation_name
+ORDER BY issue;
 SQL
 REMOTE
   )" || fail "remote schema check failed: $remote_ssh:$remote_db"
 
-  [[ -z "$missing" ]] || fail "remote schema missing required tables: $(printf '%s' "$missing" | tr '\n' ', ' | sed 's/, $//')"
+  [[ -z "$issues" ]] || fail "remote schema incompatible: $(printf '%s' "$issues" | tr '\n' ', ' | sed 's/, $//')"
+
+  local processing_join_count
+  processing_join_count="$(ssh -o BatchMode=yes -o ConnectTimeout=10 "$remote_ssh" bash -s -- "$remote_db" <<'REMOTE'
+set -euo pipefail
+db="$1"
+mysql --batch --skip-column-names --connect-timeout=5 "$db" <<'SQL'
+SELECT COUNT(*)
+FROM aihr_knowledge_attach a
+LEFT JOIN sys_oss o
+  ON o.oss_id = a.oss_id
+ AND o.tenant_id = a.tenant_id;
+SQL
+REMOTE
+  )" || fail "remote processing join check failed: $remote_ssh:$remote_db"
+  [[ "$processing_join_count" =~ ^[0-9]+$ ]] || fail "remote processing join count is invalid: $processing_join_count"
   echo "remote_schema=16/16 $remote_ssh:$remote_db"
+  echo "remote_tenant_collation=aligned"
+  echo "remote_processing_join_count=$processing_join_count"
 }
 
 changed_files="$(git status --porcelain)"
diff --git a/scripts/tests/aihr-schema-migrations.test.sh b/scripts/tests/aihr-schema-migrations.test.sh
index 481b21d7..66b58cf8 100755
--- a/scripts/tests/aihr-schema-migrations.test.sh
+++ b/scripts/tests/aihr-schema-migrations.test.sh
@@ -11,6 +11,17 @@ MYSQL_CONTAINER="wygj-mysql"
 DB="wygj_aihr_schema_test_$$"
 LEGACY_DB="wygj_aihr_candidate_legacy_test_$$"
 
+tenant_contract_violations="$({
+  find "$ROOT_DIR/backend/script/sql" -maxdepth 2 -type f -name 'aihr_*_mysql8.sql' -print0 \
+    | xargs -0 rg -n '^[[:space:]]*`?tenant_id`?[[:space:]]+varchar\(20\)' \
+    | grep -v 'COLLATE utf8mb4_general_ci'
+} || true)"
+if [[ -n "$tenant_contract_violations" ]]; then
+  echo "FAIL: AIHR tenant_id DDL must use the framework utf8mb4_general_ci contract:" >&2
+  printf '%s\n' "$tenant_contract_violations" >&2
+  exit 1
+fi
+
 while IFS= read -r migration; do
   migration_name="$(basename "$migration")"
   grep -Fq "backend/script/sql/update/$migration_name" "$ROOT_DIR/docs/BRD_PRODUCTION_MIGRATION_RUNBOOK.md" || {
@@ -185,4 +196,30 @@ test "$candidate_interview_tables" = 'aihr_candidate_employee_link,aihr_candidat
 candidate_interview_columns="$(mysql "$LEGACY_DB" -N -B -e "SELECT COUNT(*) FROM information_schema.columns WHERE table_schema='$LEGACY_DB' AND ((table_name = 'aihr_candidate_material' AND column_name IN ('reviewer','reviewed_time')) OR (table_name = 'aihr_interview_result' AND column_name IN ('questions_json','reviewed_score','review_status','reviewer','review_note','reviewed_time')));")"
 test "$candidate_interview_columns" = '8'
 
-echo "PASS: AIHR legacy schema migrations are idempotent, including practice evidence, knowledge feedback, candidate interview review, and position/SOP qualification contracts"
+mysql "$LEGACY_DB" <<'SQL'
+CREATE TABLE sys_oss (
+  oss_id bigint NOT NULL,
+  tenant_id varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci DEFAULT '000000',
+  PRIMARY KEY (oss_id)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci;
+CREATE TABLE aihr_collation_probe (
+  id bigint NOT NULL,
+  oss_id bigint NOT NULL,
+  tenant_id varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci DEFAULT '000000',
+  PRIMARY KEY (id)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci;
+INSERT INTO sys_oss (oss_id, tenant_id) VALUES (1, '000000');
+INSERT INTO aihr_collation_probe (id, oss_id, tenant_id) VALUES (1, 1, '000000');
+SQL
+if mysql "$LEGACY_DB" -N -B -e "SELECT COUNT(*) FROM aihr_collation_probe a JOIN sys_oss o ON o.oss_id=a.oss_id AND o.tenant_id=a.tenant_id;" >/dev/null 2>&1; then
+  echo "FAIL: mixed-collation tenant join unexpectedly succeeded before migration" >&2
+  exit 1
+fi
+mysql "$LEGACY_DB" < "$ROOT_DIR/backend/script/sql/update/aihr_20260715_tenant_collation_mysql8.sql"
+mysql "$LEGACY_DB" < "$ROOT_DIR/backend/script/sql/update/aihr_20260715_tenant_collation_mysql8.sql"
+mismatched_tenant_columns="$(mysql "$LEGACY_DB" -N -B -e "SELECT COUNT(*) FROM information_schema.columns WHERE table_schema='$LEGACY_DB' AND table_name LIKE 'aihr\\_%' AND column_name='tenant_id' AND collation_name <> 'utf8mb4_general_ci';")"
+test "$mismatched_tenant_columns" = '0'
+collation_join_count="$(mysql "$LEGACY_DB" -N -B -e "SELECT COUNT(*) FROM aihr_collation_probe a JOIN sys_oss o ON o.oss_id=a.oss_id AND o.tenant_id=a.tenant_id;")"
+test "$collation_join_count" = '1'
+
+echo "PASS: AIHR legacy schema migrations are idempotent, including tenant collation compatibility"