管理后台前后端逻辑、UI美化

backend/alembic/versions/20260116_01_add_is_locked_to_studies.py

@@ -0,0 +1,28 @@
+"""add is_locked to studies
+
+Revision ID: 20260116_01
+Revises: 20250310_02
+Create Date: 2026-01-16 11:41:00.000000
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision: str = '20260116_01'
+down_revision: Union[str, None] = '20250310_02'
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    # 添加 is_locked 字段到 studies 表
+    op.add_column('studies', sa.Column('is_locked', sa.Boolean(), nullable=False, server_default='false'))
+
+
+def downgrade() -> None:
+    # 删除 is_locked 字段
+    op.drop_column('studies', 'is_locked')