neue Archivfunktion und Optimierung an Artikelbearbeitung

backend/alembic/versions/0013_archive.py

@@ -0,0 +1,39 @@
+"""Phase 11: Archivierung von Listen
+
+Revision ID: 0013
+Revises: 0012
+Create Date: 2026-08-08
+"""
+from collections.abc import Sequence
+
+import sqlalchemy as sa
+from alembic import op
+
+revision: str = "0013"
+down_revision: str | None = "0012"
+branch_labels: str | Sequence[str] | None = None
+depends_on: str | Sequence[str] | None = None
+
+
+def upgrade() -> None:
+    op.add_column("list_member", sa.Column("archived_at", sa.DateTime(), nullable=True))
+    op.add_column(
+        "list_member", sa.Column("last_opened_at", sa.DateTime(), nullable=True)
+    )
+    # Bestandsmitgliedschaften nicht sofort der Automatik aussetzen:
+    # Ohne Startwert waere last_opened_at NULL und damit scheinbar "nie
+    # geoeffnet". Der Beitrittszeitpunkt ist die konservativere Annahme.
+    op.execute(
+        "UPDATE list_member SET last_opened_at = joined_at "
+        "WHERE last_opened_at IS NULL"
+    )
+
+    op.add_column("shopping_list", sa.Column("warn_7d_at", sa.DateTime(), nullable=True))
+    op.add_column("shopping_list", sa.Column("warn_1d_at", sa.DateTime(), nullable=True))
+
+
+def downgrade() -> None:
+    op.drop_column("shopping_list", "warn_1d_at")
+    op.drop_column("shopping_list", "warn_7d_at")
+    op.drop_column("list_member", "last_opened_at")
+    op.drop_column("list_member", "archived_at")