fix: 添加admin_task_templates表teacher_id字段迁移

- 新增teacher_id列到admin_task_templates表
- 添加idx_teacher_id索引
- 修复Unknown column 'teacher_id'错误

zxyj-backend/src/main/java/com/zxyj/config/DatabaseInitializer.java

@@ -570,6 +570,51 @@ public class DatabaseInitializer implements CommandLineRunner {
             // 索引已存在，忽略错误
         }
 
+        // 迁移10: users表添加teacherFamilyIds字段（指导师关联的家庭ID列表）
+        try {
+            jdbcTemplate.execute("ALTER TABLE users ADD COLUMN teacher_family_ids VARCHAR(500) COMMENT '指导师关联的家庭ID列表(逗号分隔)'");
+            log.info("已添加teacher_family_ids列到users表");
+        } catch (Exception e) {
+            // 列已存在，忽略错误
+        }
+
+        // 迁移11: families表添加teacherId字段（绑定的指导师ID）
+        try {
+            jdbcTemplate.execute("ALTER TABLE families ADD COLUMN teacher_id BIGINT COMMENT '绑定的指导师ID'");
+            log.info("已添加teacher_id列到families表");
+        } catch (Exception e) {
+            // 列已存在，忽略错误
+        }
+
+        try {
+            jdbcTemplate.execute("ALTER TABLE families ADD INDEX idx_teacher_id (teacher_id)");
+            log.info("已添加idx_teacher_id索引到families表");
+        } catch (Exception e) {
+            // 索引已存在，忽略错误
+        }
+
+        // 迁移12: 创建 teacher_messages 表（家长咨询指导师）
+        try {
+            jdbcTemplate.execute("CREATE TABLE IF NOT EXISTS teacher_messages (" +
+                    "id BIGINT AUTO_INCREMENT PRIMARY KEY, " +
+                    "family_id BIGINT NOT NULL COMMENT '家庭ID', " +
+                    "parent_id BIGINT NOT NULL COMMENT '家长用户ID', " +
+                    "teacher_id BIGINT NOT NULL COMMENT '指导师用户ID', " +
+                    "content TEXT NOT NULL COMMENT '消息内容', " +
+                    "reply_content TEXT COMMENT '回复内容', " +
+                    "status VARCHAR(20) DEFAULT 'pending' COMMENT '状态:pending(待回复)/replied(已回复)', " +
+                    "created_at DATETIME DEFAULT CURRENT_TIMESTAMP, " +
+                    "replied_at DATETIME COMMENT '回复时间', " +
+                    "INDEX idx_family_id (family_id), " +
+                    "INDEX idx_teacher_id (teacher_id), " +
+                    "INDEX idx_parent_id (parent_id), " +
+                    "INDEX idx_status (status)" +
+                    ") ENGINE=InnoDB DEFAULT CHARSET=utf8mb4");
+            log.info("已创建teacher_messages表");
+        } catch (Exception e) {
+            // 表已存在，忽略错误
+        }
+
         log.info("数据库迁移完成");
     }