feat: 费用状态字段 + 表格排序 + 首页回款提醒 + 回款率着色

- 平台费用新增状态字段(计入费用/暂不计入),默认计入费用
- 费用表格月份列置首,所有表头点击正/倒序排序
- 首页新增回款提醒条(金色渐变,含确收/回款/未回款/回款率)
- 业务表格回款率着色:<30%红,30-80%黄,>=100%绿
- 版本号v1.0.0.5

backend/migrations/columns.py

@@ -105,6 +105,8 @@ def migrate_add_columns():
             "ALTER TABLE expense_records ADD COLUMN expense_month VARCHAR(20) NOT NULL DEFAULT ''")
         _add_column_if_missing(conn, "expense_records", "incurred_amount",
             "ALTER TABLE expense_records ADD COLUMN incurred_amount DOUBLE NOT NULL DEFAULT 0")
+        _add_column_if_missing(conn, "expense_records", "status",
+            "ALTER TABLE expense_records ADD COLUMN status VARCHAR(50) NOT NULL DEFAULT '计入费用'")
 
         # project_finances 费用明细 JSON 数据
         _add_column_if_missing(conn, "project_finances", "expense_data",