管理后台前后端逻辑、UI美化

backend/app/crud/member.py

@@ -1,7 +1,7 @@
 import uuid
 from typing import Sequence
 
-from sqlalchemy import select, update
+from sqlalchemy import delete, select, update
 from sqlalchemy.ext.asyncio import AsyncSession
 
 from app.models.study_member import StudyMember
@@ -54,13 +54,8 @@ async def update_member(db: AsyncSession, member: StudyMember, member_in: StudyM
 
 
 async def remove_member(db: AsyncSession, member: StudyMember) -> StudyMember:
-    await db.execute(
-        update(StudyMember)
-        .where(StudyMember.id == member.id)
-        .values(is_active=False)
-    )
+    await db.execute(delete(StudyMember).where(StudyMember.id == member.id))
     await db.commit()
-    await db.refresh(member)
     return member