baseline: Clover 独立仓库首次基线提交

将 Clover 从上层产品包旧仓库中独立出来,建立专属版本控制。
当前状态=纵切片端到端已打通(登录→选品→出文出图→审核→下载包),
M1文案质量去套路化已验收。此提交作为后续按核销清单逐条修复的基线。

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

backend/alembic/versions/001_banana_users_tables.py

@@ -0,0 +1,64 @@
+"""001_banana_users_tables
+
+Revision ID: 001
+Revises:
+Create Date: 2026-06-09
+Alembic 001: 从 banana 搬 3 张表（users/login_records/user_preferences）
+删除 credits 字段，其余无改。
+"""
+
+from typing import Sequence, Union
+
+import sqlalchemy as sa
+from alembic import op
+
+revision: str = "001"
+down_revision: Union[str, None] = None
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    op.create_table(
+        "users",
+        sa.Column("id", sa.BigInteger(), autoincrement=True, nullable=False),
+        sa.Column("username", sa.String(64), nullable=False),
+        sa.Column("email", sa.String(255), nullable=False),
+        sa.Column("hashed_password", sa.String(255), nullable=False),
+        sa.Column("is_active", sa.Boolean(), nullable=False, server_default="1"),
+        sa.Column("created_at", sa.DateTime(), server_default=sa.text("now()"), nullable=False),
+        sa.Column("updated_at", sa.DateTime(), server_default=sa.text("now()"), nullable=False),
+        sa.PrimaryKeyConstraint("id"),
+        sa.UniqueConstraint("username"),
+        sa.UniqueConstraint("email"),
+    )
+
+    op.create_table(
+        "login_records",
+        sa.Column("id", sa.BigInteger(), autoincrement=True, nullable=False),
+        sa.Column("user_id", sa.BigInteger(), nullable=False),
+        sa.Column("ip_address", sa.String(64), nullable=True),
+        sa.Column("user_agent", sa.String(512), nullable=True),
+        sa.Column("created_at", sa.DateTime(), server_default=sa.text("now()"), nullable=False),
+        sa.ForeignKeyConstraint(["user_id"], ["users.id"], ondelete="CASCADE"),
+        sa.PrimaryKeyConstraint("id"),
+    )
+    op.create_index("idx_login_records_user_id", "login_records", ["user_id"])
+
+    op.create_table(
+        "user_preferences",
+        sa.Column("id", sa.BigInteger(), autoincrement=True, nullable=False),
+        sa.Column("user_id", sa.BigInteger(), nullable=False),
+        sa.Column("preferences_json", sa.Text(), nullable=True),
+        sa.Column("updated_at", sa.DateTime(), server_default=sa.text("now()"), nullable=False),
+        sa.ForeignKeyConstraint(["user_id"], ["users.id"], ondelete="CASCADE"),
+        sa.PrimaryKeyConstraint("id"),
+        sa.UniqueConstraint("user_id"),
+    )
+
+
+def downgrade() -> None:
+    op.drop_table("user_preferences")
+    op.drop_index("idx_login_records_user_id", "login_records")
+    op.drop_table("login_records")
+    op.drop_table("users")