优化情报分栏和日报展示

migrations/versions/202607081700_add_signal_source_type.py

@@ -0,0 +1,32 @@
+"""add signal source type
+
+Revision ID: 202607081700
+Revises: 202607081530
+Create Date: 2026-07-08 17:00:00
+"""
+
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+
+revision: str = "202607081700"
+down_revision: Union[str, None] = "202607081530"
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    # source_type让新闻和GitHub项目拥有稳定分类，仪表盘和API都按这个字段分组。
+    op.add_column(
+        "signals",
+        sa.Column("source_type", sa.String(length=20), nullable=False, server_default="news"),
+    )
+    op.execute("UPDATE signals SET source_type = 'github' WHERE source_name = 'GitHub'")
+    op.create_index("ix_signals_source_type", "signals", ["source_type"])
+
+
+def downgrade() -> None:
+    # 回滚时移除分类索引和字段，恢复迁移前的signals结构。
+    op.drop_index("ix_signals_source_type", table_name="signals")
+    op.drop_column("signals", "source_type")