diff --git a/pom.xml b/pom.xml
index 2959d26..36960cb 100644
--- a/pom.xml
+++ b/pom.xml
@@ -56,6 +56,23 @@
             <artifactId>lombok</artifactId>
             <optional>true</optional>
         </dependency>
+        <dependency>
+            <groupId>io.jsonwebtoken</groupId>
+            <artifactId>jjwt-api</artifactId>
+            <version>0.12.6</version>
+        </dependency>
+        <dependency>
+            <groupId>io.jsonwebtoken</groupId>
+            <artifactId>jjwt-impl</artifactId>
+            <version>0.12.6</version>
+            <scope>runtime</scope>
+        </dependency>
+        <dependency>
+            <groupId>io.jsonwebtoken</groupId>
+            <artifactId>jjwt-jackson</artifactId>
+            <version>0.12.6</version>
+            <scope>runtime</scope>
+        </dependency>
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-test</artifactId>
diff --git a/src/main/java/edu/situ/stlserver/config/AuthInterceptor.java b/src/main/java/edu/situ/stlserver/config/AuthInterceptor.java
index 07a0567..480ebe6 100644
--- a/src/main/java/edu/situ/stlserver/config/AuthInterceptor.java
+++ b/src/main/java/edu/situ/stlserver/config/AuthInterceptor.java
@@ -13,10 +13,11 @@ public class AuthInterceptor implements HandlerInterceptor {
         if (request.getRequestURI().contains("/auth/login")) {
             return true;
         }
-        // 放行静态资源和Swagger
+        // 放行静态资源、Swagger和图片
         if (request.getRequestURI().contains("/index.html")
                 || request.getRequestURI().contains("/v3/api-docs")
-                || request.getRequestURI().contains("/swagger-ui")) {
+                || request.getRequestURI().contains("/swagger-ui")
+                || request.getRequestURI().contains("/images/")) {
             return true;
         }
 
diff --git a/src/main/java/edu/situ/stlserver/dao/MemberMapper.java b/src/main/java/edu/situ/stlserver/dao/MemberMapper.java
index 9e1a268..500515f 100644
--- a/src/main/java/edu/situ/stlserver/dao/MemberMapper.java
+++ b/src/main/java/edu/situ/stlserver/dao/MemberMapper.java
@@ -19,7 +19,7 @@ public interface MemberMapper {
                     "<if test=\"sex != null and sex != 0\"> AND `sex` = #{sex}</if>",
                     "<if test=\"status != null and status != 1\">",
                         "<choose>",
-                            "<when test=\"status == 2\"> AND end_date IS NULL OR end_date &gt;= CURDATE()</when>",
+                            "<when test=\"status == 2\"> AND (end_date IS NULL OR end_date &gt;= CURDATE())</when>",
                             "<when test=\"status == 3\"> AND end_date IS NOT NULL AND end_date &lt; CURDATE()</when>",
                         "</choose>",
                     "</if>",
diff --git a/src/main/java/edu/situ/stlserver/service/impl/CoachServiceImpl.java b/src/main/java/edu/situ/stlserver/service/impl/CoachServiceImpl.java
index 34dfb02..eae35e6 100644
--- a/src/main/java/edu/situ/stlserver/service/impl/CoachServiceImpl.java
+++ b/src/main/java/edu/situ/stlserver/service/impl/CoachServiceImpl.java
@@ -44,11 +44,19 @@ public class CoachServiceImpl implements CoachService {
 
     @Override
     public void quit(Integer id) {
+        Coach coach = coachMapper.selectById(id);
+        if (coach.getQuitDate() != null) {
+            throw new RuntimeException("该教练已离职");
+        }
         coachMapper.quit(id, DateUtil.today());
     }
 
     @Override
     public void rejoin(Integer id) {
+        Coach coach = coachMapper.selectById(id);
+        if (coach.getQuitDate() == null) {
+            throw new RuntimeException("该教练在职中");
+        }
         coachMapper.rejoin(id);
     }
 
diff --git a/src/main/java/edu/situ/stlserver/service/impl/MemberServiceImpl.java b/src/main/java/edu/situ/stlserver/service/impl/MemberServiceImpl.java
index 7892e84..9f6397d 100644
--- a/src/main/java/edu/situ/stlserver/service/impl/MemberServiceImpl.java
+++ b/src/main/java/edu/situ/stlserver/service/impl/MemberServiceImpl.java
@@ -44,6 +44,10 @@ public class MemberServiceImpl implements MemberService {
 
     @Override
     public void cancel(Integer id) {
+        Member member = memberMapper.selectById(id);
+        if (member.getEndDate() != null) {
+            throw new RuntimeException("该会员已过期");
+        }
         memberMapper.cancel(id, DateUtil.today());
     }
 
diff --git a/src/main/resources/data.sql b/src/main/resources/data.sql
index 3a36942..6c06272 100644
--- a/src/main/resources/data.sql
+++ b/src/main/resources/data.sql
@@ -1,3 +1,26 @@
+-- 教练模拟数据
+INSERT INTO `coaches` (`name`, `sex`, `avatar`, `remark`, `quit_date`) VALUES
+('铁娃', 1, NULL, '擅长瑜伽和普拉提', '2024-12-15'),
+('小明', 1, NULL, '力量训练专家', NULL),
+('张伟', 1, NULL, '搏击教练，散打冠军', '2025-01-20'),
+('李娜', 2, NULL, '有氧舞蹈教练', NULL),
+('王强', 1, NULL, '资深健身教练', '2024-11-08'),
+('刘芳', 2, NULL, '普拉提认证教练', NULL),
+('陈刚', 1, NULL, '动感单车教练', '2025-03-10'),
+('赵敏', 2, NULL, '游泳教练', NULL),
+('周涛', 1, NULL, '拳击教练', '2024-10-25'),
+('吴雪', 2, NULL, '形体塑造教练', NULL),
+('孙磊', 1, NULL, '康复训练专家', '2025-02-14'),
+('朱婷', 2, NULL, '舞蹈教练', NULL),
+('林浩', 1, NULL, '攀岩教练', '2024-09-30'),
+('杨丽', 2, NULL, '空手道教练', NULL),
+('黄勇', 1, NULL, '肚皮舞教练', '2025-04-05'),
+('徐静', 2, NULL, 'CrossFit教练', NULL),
+('马超', 1, NULL, '户外拓展教练', '2024-08-18'),
+('罗娟', 2, NULL, '瑜伽教练', NULL),
+('梁鑫', 1, NULL, '格斗教练', '2025-05-22'),
+('宋雨', 2, NULL, '有氧操教练', NULL);
+
 -- 会员模拟数据
 INSERT INTO `members` (`name`, `sex`, `phone`, `level`, `remark`, `start_date`, `end_date`, `remain_count`, `total_spend`) VALUES
 ('张三', 1, '13800138001', '金卡', '年卡会员，喜欢瑜伽', '2024-01-15', '2025-01-15', NULL, 5999),