diff --git a/backend/alembic/versions/79bcc5aa98d4_v6_系统设置_二次分配_审批表与角色参数种子.py b/backend/alembic/versions/79bcc5aa98d4_v6_系统设置_二次分配_审批表与角色参数种子.py
new file mode 100644
index 0000000..a66cc12
--- /dev/null
+++ b/backend/alembic/versions/79bcc5aa98d4_v6_系统设置_二次分配_审批表与角色参数种子.py
@@ -0,0 +1,436 @@
+"""V6 系统设置/二次分配/审批表与角色参数种子
+
+Revision ID: 79bcc5aa98d4
+Revises: 8efc189b131f
+Create Date: 2026-10-15 15:42:13.467447
+
+"""
+
+from collections.abc import Sequence
+from datetime import date
+
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects import mysql
+
+# revision identifiers, used by Alembic.
+revision: str = "79bcc5aa98d4"
+down_revision: str | Sequence[str] | None = "8efc189b131f"
+branch_labels: str | Sequence[str] | None = None
+depends_on: str | Sequence[str] | None = None
+
+
+def upgrade() -> None:
+    """应用迁移。"""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.create_table(
+        "system_settings",
+        sa.Column(
+            "id", mysql.BIGINT(unsigned=True), autoincrement=True, nullable=False, comment="主键ID"
+        ),
+        sa.Column(
+            "company_name",
+            sa.String(length=64),
+            nullable=False,
+            comment="公司名称（登录页与导出页眉展示）",
+        ),
+        sa.Column(
+            "logo_path",
+            sa.String(length=255),
+            nullable=True,
+            comment="logo 相对路径（文件存 uploads/logo/，null=未上传使用默认）",
+        ),
+        sa.Column(
+            "create_time",
+            sa.DateTime(),
+            server_default=sa.text("CURRENT_TIMESTAMP"),
+            nullable=False,
+            comment="创建时间",
+        ),
+        sa.Column(
+            "update_time",
+            sa.DateTime(),
+            server_default=sa.text("CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP"),
+            nullable=False,
+            comment="更新时间",
+        ),
+        sa.PrimaryKeyConstraint("id", name=op.f("pk_system_settings")),
+        comment="系统设置表（公司信息，全系统单行）",
+        mysql_charset="utf8mb4",
+        mysql_collate="utf8mb4_general_ci",
+        mysql_engine="InnoDB",
+    )
+    op.create_table(
+        "approval_orders",
+        sa.Column(
+            "id", mysql.BIGINT(unsigned=True), autoincrement=True, nullable=False, comment="主键ID"
+        ),
+        sa.Column(
+            "order_no",
+            sa.String(length=32),
+            nullable=False,
+            comment="审批单号，自动生成 AP{YYYYMMDD}-{4位当日序号}",
+        ),
+        sa.Column(
+            "order_type",
+            mysql.TINYINT(),
+            nullable=False,
+            comment="审批对象类型：1二次分配方案 2月度结算（预留）",
+        ),
+        sa.Column(
+            "ref_id",
+            mysql.BIGINT(unsigned=True),
+            nullable=False,
+            comment="引用对象ID（order_type=1 时为 businesses.id；固化无外键，删除保护由服务层承担）",
+        ),
+        sa.Column(
+            "refer_no",
+            sa.String(length=32),
+            nullable=False,
+            comment="引用对象单号（冗余固化，列表页免联查）",
+        ),
+        sa.Column(
+            "status",
+            mysql.TINYINT(),
+            server_default="1",
+            nullable=False,
+            comment="审批状态：1待财务复核 2待领导审核 3已通过 4已驳回 5已撤回",
+        ),
+        sa.Column(
+            "submitter_id",
+            mysql.BIGINT(unsigned=True),
+            nullable=True,
+            comment="提交人ID（账号删除后置空）",
+        ),
+        sa.Column(
+            "submitter_name",
+            sa.String(length=64),
+            nullable=False,
+            comment="提交人用户名（冗余固化）",
+        ),
+        sa.Column(
+            "create_time",
+            sa.DateTime(),
+            server_default=sa.text("CURRENT_TIMESTAMP"),
+            nullable=False,
+            comment="创建时间",
+        ),
+        sa.Column(
+            "update_time",
+            sa.DateTime(),
+            server_default=sa.text("CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP"),
+            nullable=False,
+            comment="更新时间",
+        ),
+        sa.ForeignKeyConstraint(
+            ["submitter_id"],
+            ["users.id"],
+            name=op.f("fk_approval_orders_submitter_id"),
+            ondelete="SET NULL",
+        ),
+        sa.PrimaryKeyConstraint("id", name=op.f("pk_approval_orders")),
+        sa.UniqueConstraint("order_no", name=op.f("uk_approval_orders_order_no")),
+        comment="审批单表（营销后勤提交→财务复核→领导审核；开关关闭时自动通过留痕）",
+        mysql_charset="utf8mb4",
+        mysql_collate="utf8mb4_general_ci",
+        mysql_engine="InnoDB",
+    )
+    op.create_index(
+        "idx_approval_orders_type_status", "approval_orders", ["order_type", "status"], unique=False
+    )
+    op.create_table(
+        "approval_steps",
+        sa.Column(
+            "id", mysql.BIGINT(unsigned=True), autoincrement=True, nullable=False, comment="主键ID"
+        ),
+        sa.Column(
+            "order_id",
+            mysql.BIGINT(unsigned=True),
+            nullable=False,
+            comment="审批单ID（approval_orders.id；单删记录随删）",
+        ),
+        sa.Column(
+            "node",
+            mysql.TINYINT(),
+            nullable=False,
+            comment="审批节点：0撤回留痕 1财务复核 2领导审核",
+        ),
+        sa.Column(
+            "action", mysql.TINYINT(), nullable=False, comment="动作：1通过 2驳回 3自动通过 4撤回"
+        ),
+        sa.Column(
+            "opinion", sa.String(length=255), nullable=True, comment="审批意见（驳回时填写）"
+        ),
+        sa.Column(
+            "operator_id",
+            mysql.BIGINT(unsigned=True),
+            nullable=True,
+            comment="操作人ID（自动通过/系统动作置空）",
+        ),
+        sa.Column(
+            "operator_name",
+            sa.String(length=64),
+            nullable=False,
+            comment="操作人用户名（冗余固化；系统动作记「系统」）",
+        ),
+        sa.Column(
+            "create_time",
+            sa.DateTime(),
+            server_default=sa.text("CURRENT_TIMESTAMP"),
+            nullable=False,
+            comment="创建时间",
+        ),
+        sa.ForeignKeyConstraint(
+            ["operator_id"],
+            ["users.id"],
+            name=op.f("fk_approval_steps_operator_id"),
+            ondelete="SET NULL",
+        ),
+        sa.ForeignKeyConstraint(
+            ["order_id"],
+            ["approval_orders.id"],
+            name=op.f("fk_approval_steps_order_id"),
+            ondelete="CASCADE",
+        ),
+        sa.PrimaryKeyConstraint("id", name=op.f("pk_approval_steps")),
+        comment="审批节点记录表（append-only；自动通过/撤回均有留痕）",
+        mysql_charset="utf8mb4",
+        mysql_collate="utf8mb4_general_ci",
+        mysql_engine="InnoDB",
+    )
+    op.create_index("idx_approval_steps_order_id", "approval_steps", ["order_id"], unique=False)
+    op.create_table(
+        "business_secondary_allocations",
+        sa.Column(
+            "id", mysql.BIGINT(unsigned=True), autoincrement=True, nullable=False, comment="主键ID"
+        ),
+        sa.Column(
+            "business_id",
+            mysql.BIGINT(unsigned=True),
+            nullable=False,
+            comment="业务ID（businesses.id；业务删除随删）",
+        ),
+        sa.Column(
+            "personnel_id",
+            mysql.BIGINT(unsigned=True),
+            nullable=False,
+            comment="参与业务员ID（personnel.id；被方案引用禁删）",
+        ),
+        sa.Column(
+            "personnel_name",
+            sa.String(length=64),
+            nullable=False,
+            comment="参与业务员姓名（冗余固化，离职后回显有名）",
+        ),
+        sa.Column(
+            "ratio",
+            sa.Numeric(precision=5, scale=2),
+            nullable=False,
+            comment="分摊比例（0-100 两位小数；不要求合计满额，余额归属待澄清#2）",
+        ),
+        sa.Column(
+            "create_time",
+            sa.DateTime(),
+            server_default=sa.text("CURRENT_TIMESTAMP"),
+            nullable=False,
+            comment="创建时间",
+        ),
+        sa.Column(
+            "update_time",
+            sa.DateTime(),
+            server_default=sa.text("CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP"),
+            nullable=False,
+            comment="更新时间",
+        ),
+        sa.ForeignKeyConstraint(
+            ["business_id"],
+            ["businesses.id"],
+            name=op.f("fk_business_secondary_allocations_business_id"),
+            ondelete="CASCADE",
+        ),
+        sa.ForeignKeyConstraint(
+            ["personnel_id"],
+            ["personnel.id"],
+            name=op.f("fk_business_secondary_allocations_personnel_id"),
+            ondelete="RESTRICT",
+        ),
+        sa.PrimaryKeyConstraint("id", name=op.f("pk_business_secondary_allocations")),
+        comment="业务二次分配方案明细表（合同建立时录入；比例不要求合计满额，余额归属待澄清）",
+        mysql_charset="utf8mb4",
+        mysql_collate="utf8mb4_general_ci",
+        mysql_engine="InnoDB",
+    )
+    op.create_index(
+        "idx_business_secondary_allocations_business_id",
+        "business_secondary_allocations",
+        ["business_id"],
+        unique=False,
+    )
+    op.create_index(
+        "idx_business_secondary_allocations_personnel_id",
+        "business_secondary_allocations",
+        ["personnel_id"],
+        unique=False,
+    )
+    # ### end Alembic commands ###
+
+    # ---- 种子数据（生产与开发同源；写法沿用 V1/V3 迁移先例）----
+
+    # 三个审批职能登录角色（2026-10-15 复核审批补充需求；roles 表无 is_builtin
+    # 列，内置保护由 role_service 的 BUILTIN_ROLE_CODES 白名单承担）
+    op.bulk_insert(
+        sa.table(
+            "roles",
+            sa.column("role_code", sa.String),
+            sa.column("role_name", sa.String),
+            sa.column("description", sa.String),
+            sa.column("sort_order", sa.Integer),
+        ),
+        [
+            {
+                "role_code": "marketing_ops",
+                "role_name": "营销后勤",
+                "description": "提交与录入（审批链第一节点：月结/二次分配提交）",
+                "sort_order": 3,
+            },
+            {
+                "role_code": "finance",
+                "role_name": "财务",
+                "description": "复核（审批链第二节点）",
+                "sort_order": 4,
+            },
+            {
+                "role_code": "leader",
+                "role_name": "领导",
+                "description": "审核（审批链第三节点；全览只读）",
+                "sort_order": 5,
+            },
+        ],
+    )
+
+    # 审批开关参数定义（param_definitions id 沿用 V3 种子的显式 id 方案接续 17/18）
+    op.bulk_insert(
+        sa.table(
+            "param_definitions",
+            sa.column("id", sa.BigInteger),
+            sa.column("param_code", sa.String),
+            sa.column("param_name", sa.String),
+            sa.column("param_group", sa.String),
+            sa.column("value_type", sa.String),
+            sa.column("unit", sa.String),
+            sa.column("dimension_type", sa.String),
+            sa.column("options_text", sa.String),
+            sa.column("default_value", sa.String),
+            sa.column("value_min", sa.String),
+            sa.column("value_max", sa.String),
+            sa.column("description", sa.String),
+            sa.column("sort_order", sa.Integer),
+            sa.column("status", sa.Integer),
+        ),
+        [
+            {
+                "id": 17,
+                "param_code": "approval.secondary_allocation.enabled",
+                "param_name": "二次分配审批开关",
+                "param_group": "审批开关",
+                "value_type": "BOOL",
+                "unit": None,
+                "dimension_type": "NONE",
+                "options_text": None,
+                "default_value": "0",
+                "value_min": None,
+                "value_max": None,
+                "description": (
+                    "0=二次分配方案提交即生效（系统自动通过全节点留痕，留痕不断链）；"
+                    "1=提交后进入财务复核→领导审核审批流（2026-10-15 复核审批补充需求）"
+                ),
+                "sort_order": 17,
+                "status": 1,
+            },
+            {
+                "id": 18,
+                "param_code": "approval.monthly_settlement.enabled",
+                "param_name": "月度结算审批开关",
+                "param_group": "审批开关",
+                "value_type": "BOOL",
+                "unit": None,
+                "dimension_type": "NONE",
+                "options_text": None,
+                "default_value": "0",
+                "value_min": None,
+                "value_max": None,
+                "description": (
+                    "预留参数：月度结算审批链开关（M3 ④ 月结子块接入时消费）；"
+                    "0=结算生成即生效，1=走财务复核→领导审核审批流"
+                ),
+                "sort_order": 18,
+                "status": 1,
+            },
+        ],
+    )
+
+    # 审批开关联动批次条目（batch_id=1 即 V3 的「初始版本」批次；BOOL 无维度行，
+    # 生效日期 2026-01-01 对齐其他支付环节种子）
+    op.bulk_insert(
+        sa.table(
+            "param_values",
+            sa.column("id", sa.BigInteger),
+            sa.column("param_id", sa.BigInteger),
+            sa.column("dimension_value", sa.String),
+            sa.column("effective_date", sa.Date),
+            sa.column("value_text", sa.String),
+            sa.column("batch_id", sa.BigInteger),
+        ),
+        [
+            {
+                "id": 20,
+                "param_id": 17,
+                "dimension_value": "",
+                "effective_date": date(2026, 1, 1),
+                "value_text": "0",
+                "batch_id": 1,
+            },
+            {
+                "id": 21,
+                "param_id": 18,
+                "dimension_value": "",
+                "effective_date": date(2026, 1, 1),
+                "value_text": "0",
+                "batch_id": 1,
+            },
+        ],
+    )
+
+    # 公司信息单行（system_settings 恒为一行，id=1 由迁移保底）
+    op.bulk_insert(
+        sa.table(
+            "system_settings",
+            sa.column("id", sa.BigInteger),
+            sa.column("company_name", sa.String),
+            sa.column("logo_path", sa.String),
+        ),
+        [
+            {"id": 1, "company_name": "衍水集团", "logo_path": None},
+        ],
+    )
+
+
+def downgrade() -> None:
+    """回滚迁移。
+
+    整表回滚只保留 `op.drop_table` —— DROP TABLE 会连带删除索引与外键。
+    autogenerate 原样输出的逐个 `op.drop_index` 会失败：idx_approval_steps_order_id
+    与 idx_business_secondary_allocations_personnel_id 分别是外键的唯一支撑索引，
+    单独删除被 MySQL 拒绝（errno 1553），回滚会中断在半途。
+    删除顺序：先删引用方（approval_steps/二次分配），再删被引用方。
+    行级种子反向清理：roles/param_definitions/param_values 三表由 V1/V3 建、
+    本迁移只插行（roles 三角色、参数 17/18 及其版本条目），drop_table
+    不会带走，须显式 DELETE，否则重放 upgrade 时唯一键冲突。
+    """
+    op.drop_table("business_secondary_allocations")
+    op.drop_table("approval_steps")
+    op.drop_table("approval_orders")
+    op.drop_table("system_settings")
+    op.execute("DELETE FROM param_values WHERE id IN (20, 21)")
+    op.execute("DELETE FROM param_definitions WHERE id IN (17, 18)")
+    op.execute("DELETE FROM roles WHERE role_code IN ('marketing_ops', 'finance', 'leader')")
diff --git a/backend/app/core/constants.py b/backend/app/core/constants.py
index ef6fc85..c361404 100644
--- a/backend/app/core/constants.py
+++ b/backend/app/core/constants.py
@@ -25,6 +25,19 @@ TOKEN_TYPE_BEARER = "Bearer"
 # ===== 角色编码（与 db/migration 初始化数据保持一致）=====
 ROLE_ADMIN = "admin"
 ROLE_USER = "user"
+# 2026-10-15 复核审批补充需求新增职能登录角色：营销后勤（提交+录入）、
+# 财务（复核）、领导（审核）。roles 表无 is_builtin 列，内置保护用代码
+# 白名单判定（role_service 两处内置校验改查此集合）；
+# permissions/role_permissions 细粒度激活待业务权限清单（待澄清 #6）。
+ROLE_MARKETING_OPS = "marketing_ops"
+ROLE_FINANCE = "finance"
+ROLE_LEADER = "leader"
+BUILTIN_ROLE_CODES = {
+    ROLE_ADMIN,
+    ROLE_MARKETING_OPS,
+    ROLE_FINANCE,
+    ROLE_LEADER,
+}
 
 # ===== 密码策略 =====
 # bcrypt 5.0 起对超过 72 字节的密码由「静默截断」改为「抛 ValueError」，
@@ -70,6 +83,8 @@ MODULE_BUSINESS = "业务管理"
 MODULE_SHIPMENT = "发货管理"
 MODULE_RECEIPT = "回款管理"
 MODULE_RATING = "客户评级"
+MODULE_SYSTEM_SETTINGS = "系统设置"
+MODULE_APPROVAL = "审批管理"
 
 # ===== 单据编号前缀（{前缀}{YYYYMMDD}-{当日4位序号}，序号按自然日重置）=====
 # 一期为代码常量（业务未提出配置诉求）；如需可配置，走 M1 参数体系新增参数组
@@ -77,6 +92,7 @@ NO_PREFIX_BUSINESS = "YW"
 NO_PREFIX_SHIPMENT = "SH"
 NO_PREFIX_RECEIPT = "HK"
 NO_PREFIX_PARAM = "P"
+NO_PREFIX_APPROVAL = "AP"
 
 ACTION_CREATE = "新增"
 ACTION_UPDATE = "修改"
diff --git a/backend/app/models/__init__.py b/backend/app/models/__init__.py
index c8b1493..066c6f8 100644
--- a/backend/app/models/__init__.py
+++ b/backend/app/models/__init__.py
@@ -9,8 +9,9 @@
 `Base.metadata` 包含全部表，漏掉一张就会生成「删除该表」的迁移。
 """
 
+from app.models.approval import ApprovalOrder, ApprovalStep
 from app.models.base import Base, TimestampMixin
-from app.models.business import Business, BusinessItem, BusinessStatusLog
+from app.models.business import Business, BusinessItem, BusinessStatusLog, SecondaryAllocation
 from app.models.business_role import BusinessRole
 from app.models.customer import Customer, OwnershipChangeLog
 from app.models.login_log import LoginLog
@@ -22,9 +23,12 @@ from app.models.rating import CustomerRatingGrade
 from app.models.receipt import Receipt
 from app.models.role import Permission, Role, RolePermission
 from app.models.shipment import Shipment, ShipmentItem
+from app.models.system_setting import SystemSetting
 from app.models.user import User, UserRole
 
 __all__ = [
+    "ApprovalOrder",
+    "ApprovalStep",
     "Base",
     "Business",
     "BusinessItem",
@@ -46,8 +50,10 @@ __all__ = [
     "Receipt",
     "Role",
     "RolePermission",
+    "SecondaryAllocation",
     "Shipment",
     "ShipmentItem",
+    "SystemSetting",
     "TimestampMixin",
     "User",
     "UserRole",
diff --git a/backend/app/models/approval.py b/backend/app/models/approval.py
new file mode 100644
index 0000000..bfdace5
--- /dev/null
+++ b/backend/app/models/approval.py
@@ -0,0 +1,128 @@
+"""审批模型：审批单与节点记录（2026-10-15 复核审批补充需求）。
+
+三级链路：营销后勤提交 → 财务复核 → 领导审核。行为由参数体系开关驱动
+（`approval.*.enabled` BOOL）：关闭=提交即生成「自动通过」节点留痕，
+留痕不断链（开发计划 3.2(三)）；开启=按节点人工审核，一驳全驳。
+
+依赖说明：节点准入按登录角色编码判定（ROLE_FINANCE/ROLE_LEADER），
+不动 `permissions`/`role_permissions` 闲置表 —— 细粒度权限清单待业务方
+答复（待澄清 #6）后再激活。
+
+ref_id 为**固化无外键**（同 business_status_logs 先例）：order_type=2
+（月结预留）将指向 ④ 尚未落地的表，外键无法统一指向；单据删除保护由
+服务层承担（详见 approval_service）。
+"""
+
+from datetime import datetime
+
+from sqlalchemy import DateTime, ForeignKey, Index, String, text
+from sqlalchemy.orm import Mapped, mapped_column
+
+from app.models.base import BIGINT_UNSIGNED, TINYINT_TYPE, Base, TimestampMixin, mysql_table_args
+
+# 审批单状态（approval_orders.status；流转机见 approval_service）
+APPROVAL_STATUS_PENDING_FINANCE = 1  # 待财务复核
+APPROVAL_STATUS_PENDING_LEADER = 2  # 待领导审核
+APPROVAL_STATUS_APPROVED = 3  # 已通过（终态）
+APPROVAL_STATUS_REJECTED = 4  # 已驳回（终态）
+APPROVAL_STATUS_WITHDRAWN = 5  # 已撤回（被引用方重新提交时旧在途单注销）
+
+# 节点（approval_steps.node；0 仅用于撤回留痕）
+APPROVAL_NODE_FINANCE = 1
+APPROVAL_NODE_LEADER = 2
+APPROVAL_NODE_WITHDRAW = 0
+APPROVAL_NODES = {
+    APPROVAL_STATUS_PENDING_FINANCE: APPROVAL_NODE_FINANCE,
+    APPROVAL_STATUS_PENDING_LEADER: APPROVAL_NODE_LEADER,
+}
+
+# 动作（approval_steps.action）
+APPROVAL_ACTION_APPROVE = 1  # 人工通过
+APPROVAL_ACTION_REJECT = 2  # 人工驳回
+APPROVAL_ACTION_AUTO_APPROVE = 3  # 系统自动通过（开关关闭时逐节点留痕）
+APPROVAL_ACTION_WITHDRAW = 4  # 撤回（业务重新提交时旧在途单注销）
+
+
+class ApprovalOrder(Base, TimestampMixin):
+    """审批单：一张待审对象一条审批流（状态可流转，含 update_time）。"""
+
+    __tablename__ = "approval_orders"
+    __table_args__ = mysql_table_args(
+        "审批单表（营销后勤提交→财务复核→领导审核；开关关闭时自动通过留痕）",
+        Index("idx_approval_orders_type_status", "order_type", "status"),
+    )
+
+    id: Mapped[int] = mapped_column(
+        BIGINT_UNSIGNED, primary_key=True, autoincrement=True, comment="主键ID"
+    )
+    order_no: Mapped[str] = mapped_column(
+        String(32),
+        nullable=False,
+        unique=True,
+        comment="审批单号，自动生成 AP{YYYYMMDD}-{4位当日序号}",
+    )
+    order_type: Mapped[int] = mapped_column(
+        TINYINT_TYPE, nullable=False, comment="审批对象类型：1二次分配方案 2月度结算（预留）"
+    )
+    ref_id: Mapped[int] = mapped_column(
+        BIGINT_UNSIGNED,
+        comment="引用对象ID（order_type=1 时为 businesses.id；固化无外键，删除保护由服务层承担）",
+    )
+    refer_no: Mapped[str] = mapped_column(
+        String(32), nullable=False, comment="引用对象单号（冗余固化，列表页免联查）"
+    )
+    status: Mapped[int] = mapped_column(
+        TINYINT_TYPE,
+        nullable=False,
+        server_default="1",
+        comment="审批状态：1待财务复核 2待领导审核 3已通过 4已驳回 5已撤回",
+    )
+    submitter_id: Mapped[int | None] = mapped_column(
+        BIGINT_UNSIGNED,
+        ForeignKey("users.id", ondelete="SET NULL"),
+        comment="提交人ID（账号删除后置空）",
+    )
+    submitter_name: Mapped[str] = mapped_column(
+        String(64), nullable=False, comment="提交人用户名（冗余固化）"
+    )
+
+
+class ApprovalStep(Base):
+    """审批节点记录表（append-only）：每次动作只增不改，构成时间线。
+
+    不继承 TimestampMixin（留痕无更新语义，同 business_status_logs 先例）。
+    """
+
+    __tablename__ = "approval_steps"
+    __table_args__ = mysql_table_args(
+        "审批节点记录表（append-only；自动通过/撤回均有留痕）",
+        Index("idx_approval_steps_order_id", "order_id"),
+    )
+
+    id: Mapped[int] = mapped_column(
+        BIGINT_UNSIGNED, primary_key=True, autoincrement=True, comment="主键ID"
+    )
+    order_id: Mapped[int] = mapped_column(
+        BIGINT_UNSIGNED,
+        ForeignKey("approval_orders.id", ondelete="CASCADE"),
+        nullable=False,
+        comment="审批单ID（approval_orders.id；单删记录随删）",
+    )
+    node: Mapped[int] = mapped_column(
+        TINYINT_TYPE, nullable=False, comment="审批节点：0撤回留痕 1财务复核 2领导审核"
+    )
+    action: Mapped[int] = mapped_column(
+        TINYINT_TYPE, nullable=False, comment="动作：1通过 2驳回 3自动通过 4撤回"
+    )
+    opinion: Mapped[str | None] = mapped_column(String(255), comment="审批意见（驳回时填写）")
+    operator_id: Mapped[int | None] = mapped_column(
+        BIGINT_UNSIGNED,
+        ForeignKey("users.id", ondelete="SET NULL"),
+        comment="操作人ID（自动通过/系统动作置空）",
+    )
+    operator_name: Mapped[str] = mapped_column(
+        String(64), nullable=False, comment="操作人用户名（冗余固化；系统动作记「系统」）"
+    )
+    create_time: Mapped[datetime] = mapped_column(
+        DateTime, nullable=False, server_default=text("CURRENT_TIMESTAMP"), comment="创建时间"
+    )
diff --git a/backend/app/models/business.py b/backend/app/models/business.py
index 518b254..3d3a891 100644
--- a/backend/app/models/business.py
+++ b/backend/app/models/business.py
@@ -33,6 +33,58 @@ BUSINESS_STATUS_DONE = 2
 BUSINESS_STATUS_TERMINATED = 3
 
 
+class SecondaryAllocation(Base, TimestampMixin):
+    """二次分配方案明细表（2026-10-15 补充需求「二次分配方案」）。
+
+    口径（AI_CONTEXT 待澄清 #1/#2 未答复前的边界）：
+    - 只出现在合同刚建立时；修改在首次月结前留痕放行，月结后只读（月结在 ④，
+      终态门槛先行承担「修改不影响已结算月份」）
+    - 分配比例**不要求合计 100%**：余额归属未定（澄清 #2），存储只落参与人
+      与比例，响应以 hint 提示合计/余额，不做强制校验
+    - T+ 无二次分配数据（2026-10-15 回馈）：参与人全为系统内人工维护
+    - **分摊计算不在本期**（澄清 #1 分配标的三种口径结果不同）：④ 核算时按
+      核算时刻读「当前生效行」做快照，天然隔离历史版本，故无版本表
+
+    personnel 外键 **RESTRICT**：被方案引用的人员禁删——分摊金额待定的记录
+    不允许静默失联（silently deleted）导致回档无法人工查验；personnel_name
+    冗余固化，人离职后方案回显仍有名。uk 锁 (business_id, personnel_id)，
+    同一合同的同一参与人仅一行，重复提交在服务层聚合。
+    """
+
+    __tablename__ = "business_secondary_allocations"
+    __table_args__ = mysql_table_args(
+        # 表/列注释避开「%」字符：SHOW CREATE TABLE 经驱动参数化转义为「%%」，
+        # 会与 ORM 侧 comment 字面断言失配（全库既有注释同此惯例）
+        "业务二次分配方案明细表（合同建立时录入；比例不要求合计满额，余额归属待澄清）",
+        Index("idx_business_secondary_allocations_business_id", "business_id"),
+        Index("idx_business_secondary_allocations_personnel_id", "personnel_id"),
+    )
+
+    id: Mapped[int] = mapped_column(
+        BIGINT_UNSIGNED, primary_key=True, autoincrement=True, comment="主键ID"
+    )
+    business_id: Mapped[int] = mapped_column(
+        BIGINT_UNSIGNED,
+        ForeignKey("businesses.id", ondelete="CASCADE"),
+        nullable=False,
+        comment="业务ID（businesses.id；业务删除随删）",
+    )
+    personnel_id: Mapped[int] = mapped_column(
+        BIGINT_UNSIGNED,
+        ForeignKey("personnel.id", ondelete="RESTRICT"),
+        nullable=False,
+        comment="参与业务员ID（personnel.id；被方案引用禁删）",
+    )
+    personnel_name: Mapped[str] = mapped_column(
+        String(64), nullable=False, comment="参与业务员姓名（冗余固化，离职后回显有名）"
+    )
+    ratio: Mapped[Decimal] = mapped_column(
+        Numeric(5, 2),
+        nullable=False,
+        comment="分摊比例（0-100 两位小数；不要求合计满额，余额归属待澄清#2）",
+    )
+
+
 class Business(Base, TimestampMixin, TPlusSyncMixin):
     """业务表（需求 2.2.1）：业务编号自动生成，即报表 2.4.1 的「合同编号」。"""
 
diff --git a/backend/app/models/system_setting.py b/backend/app/models/system_setting.py
new file mode 100644
index 0000000..334e8aa
--- /dev/null
+++ b/backend/app/models/system_setting.py
@@ -0,0 +1,31 @@
+"""系统设置模型：公司信息单例行。
+
+与 M1 计提参数体系刻意分离：公司名称/logo 是「展示事实」，没有按生效日期
+时点化演算的语义（参数体系按 effective_date 取值快照），且参数值列
+value_text 为 String(64) 装不下；故独立单行表。logo 只存相对路径——文件在
+`backend/uploads/logo/`，独立于数据库备份体积且可单独替换（见
+system_setting_service）。整个系统恒为单行（迁移种子 id=1 保底，upsert 维护）。
+"""
+
+from sqlalchemy import String
+from sqlalchemy.orm import Mapped, mapped_column
+
+from app.models.base import BIGINT_UNSIGNED, Base, TimestampMixin, mysql_table_args
+
+
+class SystemSetting(Base, TimestampMixin):
+    """系统设置表：本期仅公司信息（公司名称 / logo 路径），全系统单行 id=1。"""
+
+    __tablename__ = "system_settings"
+    __table_args__ = mysql_table_args("系统设置表（公司信息，全系统单行）")
+
+    id: Mapped[int] = mapped_column(
+        BIGINT_UNSIGNED, primary_key=True, autoincrement=True, comment="主键ID"
+    )
+    company_name: Mapped[str] = mapped_column(
+        String(64), nullable=False, comment="公司名称（登录页与导出页眉展示）"
+    )
+    logo_path: Mapped[str | None] = mapped_column(
+        String(255),
+        comment="logo 相对路径（文件存 uploads/logo/，null=未上传使用默认）",
+    )
diff --git a/backend/app/services/param_registry.py b/backend/app/services/param_registry.py
index 8063a46..0d3c2b3 100644
--- a/backend/app/services/param_registry.py
+++ b/backend/app/services/param_registry.py
@@ -256,6 +256,40 @@ PARAM_REGISTRY: dict[str, ParamSpec] = {
             description="试用期仅发基本工资、不发放绩效（归属待 M2 复核）",
             sort_order=16,
         ),
+        ParamSpec(
+            code="approval.secondary_allocation.enabled",
+            name="二次分配审批开关",
+            group="审批开关",
+            value_type="BOOL",
+            unit=None,
+            dimension_type="NONE",
+            options=None,
+            default_value="0",
+            value_min=None,
+            value_max=None,
+            description=(
+                "0=二次分配方案提交即生效（系统自动通过全节点留痕，留痕不断链）；"
+                "1=提交后进入财务复核→领导审核审批流（2026-10-15 复核审批补充需求）"
+            ),
+            sort_order=17,
+        ),
+        ParamSpec(
+            code="approval.monthly_settlement.enabled",
+            name="月度结算审批开关",
+            group="审批开关",
+            value_type="BOOL",
+            unit=None,
+            dimension_type="NONE",
+            options=None,
+            default_value="0",
+            value_min=None,
+            value_max=None,
+            description=(
+                "预留参数：月度结算审批链开关（M3 ④ 月结子块接入时消费）；"
+                "0=结算生成即生效，1=走财务复核→领导审核审批流"
+            ),
+            sort_order=18,
+        ),
     ]
 }
 
diff --git a/backend/app/services/role_service.py b/backend/app/services/role_service.py
index dd73912..f86fbb2 100644
--- a/backend/app/services/role_service.py
+++ b/backend/app/services/role_service.py
@@ -1,17 +1,20 @@
 """角色管理业务编排。
 
-需求 2.5.1 只定义 admin / user 两个角色，本模块属用户确认的**自主完善**
-（轻量版：不含权限点分配 —— `permissions` / `role_permissions` 表继续闲置，
-待业务方给出权限清单后再启用）。
+需求 2.5.1 定义 admin / user 两个登录角色；2026-10-15 复核审批补充需求
+新增营销后勤/财务/领导三个职能登录角色（营销后勤与财务/领导分区于审批
+节点准入）。本模块仍为轻量版（不含权限点分配 —— `permissions` /
+`role_permissions` 表继续闲置，待业务方给出权限清单后再启用）。
 
 保护规则（都是系统自举与授权安全的最低防线，不只是界面体验）：
 
-- `admin` 角色**禁删禁停** —— `cli` 建管理员与 `require_admin` 判定都依赖
-  该编码存在，删除会使系统无法自举
+- **内置角色禁删禁停**（`BUILTIN_ROLE_CODES`：admin / marketing_ops /
+  finance / leader）—— `admin` 被删除会使系统无法自举（cli 建管理员与
+  `require_admin` 判定依赖）；财务/领导是审批节点准入锚点，被删会让
+  在途审批流失去可操作人
 - **有用户绑定的角色禁删** —— `user_roles` 外键是 CASCADE，直接删除会静默
   剥离绑定用户的权限，属安全与审计事故；删除前的校验走 `FOR UPDATE`
   锁行，堵住「校验与删除之间并发绑定」的窗口
-- `role_code` 创建后不可改 —— 它是授权判定（`ROLE_ADMIN` 常量按编码比对）的锚点
+- `role_code` 创建后不可改 —— 它是授权判定（`BUILTIN_ROLE_CODES` 白名单按编码比对）的锚点
 - 停用角色**不解除绑定、不影响既有授权**（授权判定只看编码、不看状态），
   但**不可再分配给用户**（`user_service._resolve_roles` 拦截）
 """
@@ -27,8 +30,8 @@ from app.core.constants import (
     ACTION_DISABLE,
     ACTION_ENABLE,
     ACTION_UPDATE,
+    BUILTIN_ROLE_CODES,
     MODULE_ROLE,
-    ROLE_ADMIN,
 )
 from app.core.exceptions import BadRequestError, ForbiddenError, NotFoundError
 from app.core.response import PageResult
@@ -177,10 +180,10 @@ def set_status(
 
     停用不解除用户绑定、不影响既有授权（授权判定只看编码不看状态），
     但该角色不可再分配给用户（`user_service._resolve_roles` 拦截）；
-    内置管理员角色不可停用。
+    内置角色不可停用。
 
     :raises NotFoundError: 角色不存在
-    :raises ForbiddenError: 试图停用内置管理员角色
+    :raises ForbiddenError: 试图停用内置角色
     """
     role = role_repository.get_by_id(session, role_id)
     verb = "启用" if status == 1 else "禁用"
@@ -198,8 +201,8 @@ def set_status(
         if role is None:
             raise NotFoundError("角色不存在")
 
-        if role.role_code == ROLE_ADMIN and status == 0:
-            raise ForbiddenError("内置管理员角色不可停用")
+        if role.role_code in BUILTIN_ROLE_CODES and status == 0:
+            raise ForbiddenError("内置角色不可停用")
 
         role.status = status
         out = _to_out(role, _user_count(session, role_id))
@@ -217,12 +220,12 @@ def delete_role(
 ) -> None:
     """删除角色。
 
-    内置管理员角色不可删除；仍有关联用户的角色不可删除（提示先解除绑定）。
+    内置角色不可删除（admin 与三个审批职能角色，见 BUILTIN_ROLE_CODES）；仍有关联用户的角色不可删除（提示先解除绑定）。
     查询走 `FOR UPDATE` 锁行：校验与删除之间若发生并发绑定，CASCADE 会把
     新绑定一并静默剥离 —— 锁行使并发绑定失败（可见）而非数据被吞（不可见）。
 
     :raises NotFoundError: 角色不存在
-    :raises ForbiddenError: 试图删除内置管理员角色
+    :raises ForbiddenError: 试图删除内置角色
     :raises BadRequestError: 角色下仍有绑定的用户
     """
     role = role_repository.get_by_id(session, role_id, for_update=True)
@@ -239,8 +242,8 @@ def delete_role(
         if role is None:
             raise NotFoundError("角色不存在")
 
-        if role.role_code == ROLE_ADMIN:
-            raise ForbiddenError("内置管理员角色不可删除")
+        if role.role_code in BUILTIN_ROLE_CODES:
+            raise ForbiddenError("内置角色不可删除")
 
         # user_roles 外键是 CASCADE：不拦截的话，删除会静默剥离绑定用户的权限
         user_count = _user_count(session, role_id)
diff --git a/backend/tests/integration/test_param_management.py b/backend/tests/integration/test_param_management.py
index cd17dbc..5cc0e52 100644
--- a/backend/tests/integration/test_param_management.py
+++ b/backend/tests/integration/test_param_management.py
@@ -86,9 +86,10 @@ def _snapshot_value(client: TestClient, admin: dict, param_code: str, *, as_of:
 class TestCatalog:
     """参数目录：种子完整性与时点化回溯。"""
 
-    def test_目录共16项且覆盖七个分组(self, client: TestClient, admin: dict) -> None:
+    def test_目录共18项且覆盖八个分组(self, client: TestClient, admin: dict) -> None:
+        """V6 起含审批开关组（16 计提项 + 2 BOOL 开关）。"""
         items = client.get(_PARAMS, headers=admin["headers"]).json()["data"]
-        assert len(items) == 16
+        assert len(items) == 18
         groups = {item["param_group"] for item in items}
         assert groups == {
             "业务员个人户",
@@ -98,6 +99,7 @@ class TestCatalog:
             "支付环节",
             "产品阈值",
             "月工资口径",
+            "审批开关",
         }
 
     def test_企业户比例按到账日回溯_2千分3千分双种子(self, client: TestClient, admin: dict) -> None:
diff --git a/backend/tests/integration/test_schema_sync.py b/backend/tests/integration/test_schema_sync.py
index c633331..78721f0 100644
--- a/backend/tests/integration/test_schema_sync.py
+++ b/backend/tests/integration/test_schema_sync.py
@@ -129,7 +129,7 @@ class TestSchemaSync:
 class TestSeedData:
     """字典数据与版本标记。"""
 
-    @pytest.mark.parametrize("role_code", ["admin", "user"])
+    @pytest.mark.parametrize("role_code", ["admin", "user", "marketing_ops", "finance", "leader"])
     def test_角色初始化数据在两处都存在(self, role_code: str) -> None:
         migration_sql = "\n".join(
             path.read_text(encoding="utf-8") for path in sorted(MIGRATION_DIR.glob("V*.sql"))
diff --git a/backend/tests/unit/test_models.py b/backend/tests/unit/test_models.py
index 6b4b7fd..23f6cf6 100644
--- a/backend/tests/unit/test_models.py
+++ b/backend/tests/unit/test_models.py
@@ -20,6 +20,10 @@ EXPECTED_TABLES = {
     "login_logs",
     "operation_logs",
     "business_roles",
+    "system_settings",
+    "approval_orders",
+    "approval_steps",
+    "business_secondary_allocations",
     "param_definitions",
     "param_change_batches",
     "param_values",
diff --git a/backend/tests/unit/test_param_registry.py b/backend/tests/unit/test_param_registry.py
index 6c7c596..b13dfe3 100644
--- a/backend/tests/unit/test_param_registry.py
+++ b/backend/tests/unit/test_param_registry.py
@@ -18,7 +18,7 @@ from app.services.param_registry import (
     validate_and_normalize,
 )
 
-# 与 db/migration/V3 迁移种子保持一致的 16 项编码
+# 与 db/migration 迁移种子保持一致的 18 项编码（V3 十六项 + V6 审批开关两项）
 EXPECTED_CODES = {
     "salesperson.rate.start",
     "salesperson.rate.slope",
@@ -36,14 +36,16 @@ EXPECTED_CODES = {
     "salary.basic.mode",
     "probation.annual.threshold",
     "probation.salary.basic",
+    "approval.secondary_allocation.enabled",
+    "approval.monthly_settlement.enabled",
 }
 
 
 class TestRegistry:
     """注册表元数据完整性（与迁移种子同源）。"""
 
-    def test_注册表共16项(self) -> None:
-        assert len(PARAM_REGISTRY) == 16
+    def test_注册表共18项(self) -> None:
+        assert len(PARAM_REGISTRY) == 18
 
     def test_编码集合与迁移种子一致(self) -> None:
         assert set(PARAM_REGISTRY) == EXPECTED_CODES
@@ -61,10 +63,27 @@ class TestRegistry:
                 continue
             if spec.value_type in {"DECIMAL", "INT"}:
                 parse_fraction(spec.default_value)  # 不可解析会抛 BadRequestError
+            elif spec.value_type == "BOOL":
+                assert spec.default_value in {"0", "1"}, f"{spec.code} 默认值非 0/1"
             elif spec.value_type == "ENUM":
                 assert spec.options, f"{spec.code} 为 ENUM 但无选项"
                 assert spec.default_value in spec.options
 
+    def test_BOOL开关_仅接受0与1(self) -> None:
+        """V6 首例 BOOL 注册的两个审批开关：合法值与非法值边界。"""
+        for code in (
+            "approval.secondary_allocation.enabled",
+            "approval.monthly_settlement.enabled",
+        ):
+            spec = PARAM_REGISTRY[code]
+            assert spec.value_type == "BOOL"
+            assert validate_and_normalize(spec, "0") == "0"
+            assert validate_and_normalize(spec, "1") == "1"
+            with pytest.raises(BadRequestError):
+                validate_and_normalize(spec, "true")
+            with pytest.raises(BadRequestError):
+                validate_and_normalize(spec, "2")
+
     def test_取值域上下限可解析(self) -> None:
         for spec in PARAM_REGISTRY.values():
             if spec.value_min is not None:
diff --git a/db/init/init-dev.sql b/db/init/init-dev.sql
index 885769f..e5b6076 100644
--- a/db/init/init-dev.sql
+++ b/db/init/init-dev.sql
@@ -16,6 +16,10 @@
 SET NAMES utf8mb4;
 
 -- 删除顺序遵循外键依赖：先删子表
+DROP TABLE IF EXISTS `approval_steps`;
+DROP TABLE IF EXISTS `approval_orders`;
+DROP TABLE IF EXISTS `business_secondary_allocations`;
+DROP TABLE IF EXISTS `system_settings`;
 DROP TABLE IF EXISTS `param_values`;
 DROP TABLE IF EXISTS `param_change_batches`;
 DROP TABLE IF EXISTS `param_definitions`;
@@ -408,6 +412,14 @@ INSERT INTO roles (role_code, role_name, description, sort_order) VALUES ('admin
 
 INSERT INTO roles (role_code, role_name, description, sort_order) VALUES ('user', '普通用户', '业务操作', 2);
 
+-- 2026-10-15 复核审批补充需求：三个职能登录角色（与 V6 迁移种子一致；
+-- 内置保护由 role_service 的 BUILTIN_ROLE_CODES 白名单承担）
+INSERT INTO roles (role_code, role_name, description, sort_order) VALUES ('marketing_ops', '营销后勤', '提交与录入（审批链第一节点：月结/二次分配提交）', 3);
+
+INSERT INTO roles (role_code, role_name, description, sort_order) VALUES ('finance', '财务', '复核（审批链第二节点）', 4);
+
+INSERT INTO roles (role_code, role_name, description, sort_order) VALUES ('leader', '领导', '审核（审批链第三节点；全览只读）', 5);
+
 -- ---------------------------------------------------------------------------
 -- 字典数据：业务岗位与计提参数（与 V3 迁移种子一致；口径依据 2026-10-12 业务裁决）
 -- 显式指定 id：param_values 按 param_id 引用定义，与迁移种子保持同源一致
@@ -436,7 +448,9 @@ INSERT INTO param_definitions (id, param_code, param_name, param_group, value_ty
 (13, 'product.threshold', '折算毛利润额阈值', '产品阈值', 'DECIMAL', '%', 'PRODUCT_CATEGORY', NULL, '30', '0', '100', '折算毛利润额 = 销售额 ×(毛利润率 − 阈值)；市政水利 30%、轨交 20%', 13),
 (14, 'salary.basic.mode', '月工资基本工资口径', '月工资口径', 'ENUM', NULL, 'BUSINESS_ROLE', 'INCLUDE|DEDUCT|EXCLUDE', 'INCLUDE', NULL, NULL, 'INCLUDE含基本工资 / DEDUCT扣除基本工资 / EXCLUDE不计', 14),
 (15, 'probation.annual.threshold', '试用期年累计结算阈值', '月工资口径', 'DECIMAL', '元', 'NONE', NULL, '18000', '0', NULL, '试用期年累计绩效超过此值部分年底一次性结算', 15),
-(16, 'probation.salary.basic', '试用期基本工资标准', '月工资口径', 'DECIMAL', '元', 'NONE', NULL, '3000', '0', NULL, '试用期仅发基本工资、不发放绩效（归属待 M2 复核）', 16);
+(16, 'probation.salary.basic', '试用期基本工资标准', '月工资口径', 'DECIMAL', '元', 'NONE', NULL, '3000', '0', NULL, '试用期仅发基本工资、不发放绩效（归属待 M2 复核）', 16),
+(17, 'approval.secondary_allocation.enabled', '二次分配审批开关', '审批开关', 'BOOL', NULL, 'NONE', NULL, '0', NULL, NULL, '0=二次分配方案提交即生效（系统自动通过全节点留痕，留痕不断链）；1=提交后进入财务复核→领导审核审批流（2026-10-15 复核审批补充需求）', 17),
+(18, 'approval.monthly_settlement.enabled', '月度结算审批开关', '审批开关', 'BOOL', NULL, 'NONE', NULL, '0', NULL, NULL, '预留参数：月度结算审批链开关（M3 ④ 月结子块接入时消费）；0=结算生成即生效，1=走财务复核→领导审核审批流', 18);
 
 INSERT INTO param_values (id, param_id, dimension_value, effective_date, value_text, batch_id) VALUES
 (1, 1, 'salesperson', '2026-02-17', '10', 1),
@@ -457,7 +471,9 @@ INSERT INTO param_values (id, param_id, dimension_value, effective_date, value_t
 (16, 14, 'salesperson', '2026-01-01', 'INCLUDE', 1),
 (17, 14, 'sales_manager', '2026-01-01', 'DEDUCT', 1),
 (18, 15, '', '2026-01-01', '18000', 1),
-(19, 16, '', '2026-01-01', '3000', 1);
+(19, 16, '', '2026-01-01', '3000', 1),
+(20, 17, '', '2026-01-01', '0', 1),
+(21, 18, '', '2026-01-01', '0', 1);
 
 -- ---------------------------------------------------------------------------
 -- 业务表（V5 迁移；业务编号自动生成，五项汇总冗余列由服务层事务内维护）
@@ -663,6 +679,72 @@ INSERT INTO customer_rating_grades (grade_name, min_score, max_score, sort_order
 ('C', 60, 74, 3, '合格'),
 ('D', 0, 59, 4, '待改进');
 
+-- ---------------------------------------------------------------------------
+-- 系统设置/二次分配/审批（V6 迁移；公司信息单行；分摊计算待澄清另批）
+-- ---------------------------------------------------------------------------
+CREATE TABLE system_settings (
+    id BIGINT UNSIGNED NOT NULL COMMENT '主键ID' AUTO_INCREMENT,
+    company_name VARCHAR(64) NOT NULL COMMENT '公司名称（登录页与导出页眉展示）',
+    logo_path VARCHAR(255) COMMENT 'logo 相对路径（文件存 uploads/logo/，null=未上传使用默认）',
+    create_time DATETIME NOT NULL COMMENT '创建时间' DEFAULT CURRENT_TIMESTAMP,
+    update_time DATETIME NOT NULL COMMENT '更新时间' DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+    CONSTRAINT pk_system_settings PRIMARY KEY (id)
+)CHARSET=utf8mb4 ENGINE=InnoDB COMMENT='系统设置表（公司信息，全系统单行）' COLLATE utf8mb4_general_ci;
+
+CREATE TABLE approval_orders (
+    id BIGINT UNSIGNED NOT NULL COMMENT '主键ID' AUTO_INCREMENT,
+    order_no VARCHAR(32) NOT NULL COMMENT '审批单号，自动生成 AP{YYYYMMDD}-{4位当日序号}',
+    order_type TINYINT NOT NULL COMMENT '审批对象类型：1二次分配方案 2月度结算（预留）',
+    ref_id BIGINT UNSIGNED NOT NULL COMMENT '引用对象ID（order_type=1 时为 businesses.id；固化无外键，删除保护由服务层承担）',
+    refer_no VARCHAR(32) NOT NULL COMMENT '引用对象单号（冗余固化，列表页免联查）',
+    status TINYINT NOT NULL COMMENT '审批状态：1待财务复核 2待领导审核 3已通过 4已驳回 5已撤回' DEFAULT '1',
+    submitter_id BIGINT UNSIGNED COMMENT '提交人ID（账号删除后置空）',
+    submitter_name VARCHAR(64) NOT NULL COMMENT '提交人用户名（冗余固化）',
+    create_time DATETIME NOT NULL COMMENT '创建时间' DEFAULT CURRENT_TIMESTAMP,
+    update_time DATETIME NOT NULL COMMENT '更新时间' DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+    CONSTRAINT pk_approval_orders PRIMARY KEY (id),
+    CONSTRAINT uk_approval_orders_order_no UNIQUE (order_no),
+    CONSTRAINT fk_approval_orders_submitter_id FOREIGN KEY(submitter_id) REFERENCES users (id) ON DELETE SET NULL
+)CHARSET=utf8mb4 ENGINE=InnoDB COMMENT='审批单表（营销后勤提交→财务复核→领导审核；开关关闭时自动通过留痕）' COLLATE utf8mb4_general_ci;
+
+CREATE INDEX idx_approval_orders_type_status ON approval_orders (order_type, status);
+
+CREATE TABLE approval_steps (
+    id BIGINT UNSIGNED NOT NULL COMMENT '主键ID' AUTO_INCREMENT,
+    order_id BIGINT UNSIGNED NOT NULL COMMENT '审批单ID（approval_orders.id；单删记录随删）',
+    node TINYINT NOT NULL COMMENT '审批节点：0撤回留痕 1财务复核 2领导审核',
+    action TINYINT NOT NULL COMMENT '动作：1通过 2驳回 3自动通过 4撤回',
+    opinion VARCHAR(255) COMMENT '审批意见（驳回时填写）',
+    operator_id BIGINT UNSIGNED COMMENT '操作人ID（自动通过/系统动作置空）',
+    operator_name VARCHAR(64) NOT NULL COMMENT '操作人用户名（冗余固化；系统动作记「系统」）',
+    create_time DATETIME NOT NULL COMMENT '创建时间' DEFAULT CURRENT_TIMESTAMP,
+    CONSTRAINT pk_approval_steps PRIMARY KEY (id),
+    CONSTRAINT fk_approval_steps_operator_id FOREIGN KEY(operator_id) REFERENCES users (id) ON DELETE SET NULL,
+    CONSTRAINT fk_approval_steps_order_id FOREIGN KEY(order_id) REFERENCES approval_orders (id) ON DELETE CASCADE
+)CHARSET=utf8mb4 ENGINE=InnoDB COMMENT='审批节点记录表（append-only；自动通过/撤回均有留痕）' COLLATE utf8mb4_general_ci;
+
+CREATE INDEX idx_approval_steps_order_id ON approval_steps (order_id);
+
+CREATE TABLE business_secondary_allocations (
+    id BIGINT UNSIGNED NOT NULL COMMENT '主键ID' AUTO_INCREMENT,
+    business_id BIGINT UNSIGNED NOT NULL COMMENT '业务ID（businesses.id；业务删除随删）',
+    personnel_id BIGINT UNSIGNED NOT NULL COMMENT '参与业务员ID（personnel.id；被方案引用禁删）',
+    personnel_name VARCHAR(64) NOT NULL COMMENT '参与业务员姓名（冗余固化，离职后回显有名）',
+    ratio DECIMAL(5, 2) NOT NULL COMMENT '分摊比例（0-100 两位小数；不要求合计满额，余额归属待澄清#2）',
+    create_time DATETIME NOT NULL COMMENT '创建时间' DEFAULT CURRENT_TIMESTAMP,
+    update_time DATETIME NOT NULL COMMENT '更新时间' DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+    CONSTRAINT pk_business_secondary_allocations PRIMARY KEY (id),
+    CONSTRAINT fk_business_secondary_allocations_business_id FOREIGN KEY(business_id) REFERENCES businesses (id) ON DELETE CASCADE,
+    CONSTRAINT fk_business_secondary_allocations_personnel_id FOREIGN KEY(personnel_id) REFERENCES personnel (id) ON DELETE RESTRICT
+)CHARSET=utf8mb4 ENGINE=InnoDB COMMENT='业务二次分配方案明细表（合同建立时录入；比例不要求合计满额，余额归属待澄清）' COLLATE utf8mb4_general_ci;
+
+CREATE INDEX idx_business_secondary_allocations_business_id ON business_secondary_allocations (business_id);
+
+CREATE INDEX idx_business_secondary_allocations_personnel_id ON business_secondary_allocations (personnel_id);
+
+-- 公司信息单行（system_settings 恒为一行，id=1 由迁移保底）
+INSERT INTO system_settings (id, company_name, logo_path) VALUES (1, '衍水集团', NULL);
+
 -- ---------------------------------------------------------------------------
 -- 迁移版本记录：须等于当前 head，使 alembic upgrade head 成为空操作
 -- ---------------------------------------------------------------------------
@@ -671,4 +753,4 @@ CREATE TABLE alembic_version (
     CONSTRAINT alembic_version_pkc PRIMARY KEY (version_num)
 )CHARSET=utf8mb4 ENGINE=InnoDB COLLATE utf8mb4_general_ci;
 
-INSERT INTO alembic_version (version_num) VALUES ('8efc189b131f');
+INSERT INTO alembic_version (version_num) VALUES ('79bcc5aa98d4');
diff --git a/db/migration/V6__add_settings_allocations_approvals.sql b/db/migration/V6__add_settings_allocations_approvals.sql
new file mode 100644
index 0000000..f07d227
--- /dev/null
+++ b/db/migration/V6__add_settings_allocations_approvals.sql
@@ -0,0 +1,80 @@
+-- Running upgrade 8efc189b131f -> 79bcc5aa98d4
+
+CREATE TABLE system_settings (
+    id BIGINT UNSIGNED NOT NULL COMMENT '主键ID' AUTO_INCREMENT, 
+    company_name VARCHAR(64) NOT NULL COMMENT '公司名称（登录页与导出页眉展示）', 
+    logo_path VARCHAR(255) COMMENT 'logo 相对路径（文件存 uploads/logo/，null=未上传使用默认）', 
+    create_time DATETIME NOT NULL COMMENT '创建时间' DEFAULT CURRENT_TIMESTAMP, 
+    update_time DATETIME NOT NULL COMMENT '更新时间' DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP, 
+    CONSTRAINT pk_system_settings PRIMARY KEY (id)
+)CHARSET=utf8mb4 ENGINE=InnoDB COMMENT='系统设置表（公司信息，全系统单行）' COLLATE utf8mb4_general_ci;
+
+CREATE TABLE approval_orders (
+    id BIGINT UNSIGNED NOT NULL COMMENT '主键ID' AUTO_INCREMENT, 
+    order_no VARCHAR(32) NOT NULL COMMENT '审批单号，自动生成 AP{YYYYMMDD}-{4位当日序号}', 
+    order_type TINYINT NOT NULL COMMENT '审批对象类型：1二次分配方案 2月度结算（预留）', 
+    ref_id BIGINT UNSIGNED NOT NULL COMMENT '引用对象ID（order_type=1 时为 businesses.id；固化无外键，删除保护由服务层承担）', 
+    refer_no VARCHAR(32) NOT NULL COMMENT '引用对象单号（冗余固化，列表页免联查）', 
+    status TINYINT NOT NULL COMMENT '审批状态：1待财务复核 2待领导审核 3已通过 4已驳回 5已撤回' DEFAULT '1', 
+    submitter_id BIGINT UNSIGNED COMMENT '提交人ID（账号删除后置空）', 
+    submitter_name VARCHAR(64) NOT NULL COMMENT '提交人用户名（冗余固化）', 
+    create_time DATETIME NOT NULL COMMENT '创建时间' DEFAULT CURRENT_TIMESTAMP, 
+    update_time DATETIME NOT NULL COMMENT '更新时间' DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP, 
+    CONSTRAINT pk_approval_orders PRIMARY KEY (id), 
+    CONSTRAINT fk_approval_orders_submitter_id FOREIGN KEY(submitter_id) REFERENCES users (id) ON DELETE SET NULL, 
+    CONSTRAINT uk_approval_orders_order_no UNIQUE (order_no)
+)CHARSET=utf8mb4 ENGINE=InnoDB COMMENT='审批单表（营销后勤提交→财务复核→领导审核；开关关闭时自动通过留痕）' COLLATE utf8mb4_general_ci;
+
+CREATE INDEX idx_approval_orders_type_status ON approval_orders (order_type, status);
+
+CREATE TABLE approval_steps (
+    id BIGINT UNSIGNED NOT NULL COMMENT '主键ID' AUTO_INCREMENT, 
+    order_id BIGINT UNSIGNED NOT NULL COMMENT '审批单ID（approval_orders.id；单删记录随删）', 
+    node TINYINT NOT NULL COMMENT '审批节点：0撤回留痕 1财务复核 2领导审核', 
+    action TINYINT NOT NULL COMMENT '动作：1通过 2驳回 3自动通过 4撤回', 
+    opinion VARCHAR(255) COMMENT '审批意见（驳回时填写）', 
+    operator_id BIGINT UNSIGNED COMMENT '操作人ID（自动通过/系统动作置空）', 
+    operator_name VARCHAR(64) NOT NULL COMMENT '操作人用户名（冗余固化；系统动作记「系统」）', 
+    create_time DATETIME NOT NULL COMMENT '创建时间' DEFAULT CURRENT_TIMESTAMP, 
+    CONSTRAINT pk_approval_steps PRIMARY KEY (id), 
+    CONSTRAINT fk_approval_steps_operator_id FOREIGN KEY(operator_id) REFERENCES users (id) ON DELETE SET NULL, 
+    CONSTRAINT fk_approval_steps_order_id FOREIGN KEY(order_id) REFERENCES approval_orders (id) ON DELETE CASCADE
+)CHARSET=utf8mb4 ENGINE=InnoDB COMMENT='审批节点记录表（append-only；自动通过/撤回均有留痕）' COLLATE utf8mb4_general_ci;
+
+CREATE INDEX idx_approval_steps_order_id ON approval_steps (order_id);
+
+CREATE TABLE business_secondary_allocations (
+    id BIGINT UNSIGNED NOT NULL COMMENT '主键ID' AUTO_INCREMENT, 
+    business_id BIGINT UNSIGNED NOT NULL COMMENT '业务ID（businesses.id；业务删除随删）', 
+    personnel_id BIGINT UNSIGNED NOT NULL COMMENT '参与业务员ID（personnel.id；被方案引用禁删）', 
+    personnel_name VARCHAR(64) NOT NULL COMMENT '参与业务员姓名（冗余固化，离职后回显有名）', 
+    ratio NUMERIC(5, 2) NOT NULL COMMENT '分摊比例（0-100 两位小数；不要求合计满额，余额归属待澄清#2）', 
+    create_time DATETIME NOT NULL COMMENT '创建时间' DEFAULT CURRENT_TIMESTAMP, 
+    update_time DATETIME NOT NULL COMMENT '更新时间' DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP, 
+    CONSTRAINT pk_business_secondary_allocations PRIMARY KEY (id), 
+    CONSTRAINT fk_business_secondary_allocations_business_id FOREIGN KEY(business_id) REFERENCES businesses (id) ON DELETE CASCADE, 
+    CONSTRAINT fk_business_secondary_allocations_personnel_id FOREIGN KEY(personnel_id) REFERENCES personnel (id) ON DELETE RESTRICT
+)CHARSET=utf8mb4 ENGINE=InnoDB COMMENT='业务二次分配方案明细表（合同建立时录入；比例不要求合计满额，余额归属待澄清）' COLLATE utf8mb4_general_ci;
+
+CREATE INDEX idx_business_secondary_allocations_business_id ON business_secondary_allocations (business_id);
+
+CREATE INDEX idx_business_secondary_allocations_personnel_id ON business_secondary_allocations (personnel_id);
+
+INSERT INTO roles (role_code, role_name, description, sort_order) VALUES ('marketing_ops', '营销后勤', '提交与录入（审批链第一节点：月结/二次分配提交）', 3);
+
+INSERT INTO roles (role_code, role_name, description, sort_order) VALUES ('finance', '财务', '复核（审批链第二节点）', 4);
+
+INSERT INTO roles (role_code, role_name, description, sort_order) VALUES ('leader', '领导', '审核（审批链第三节点；全览只读）', 5);
+
+INSERT INTO param_definitions (id, param_code, param_name, param_group, value_type, unit, dimension_type, options_text, default_value, value_min, value_max, description, sort_order, status) VALUES (17, 'approval.secondary_allocation.enabled', '二次分配审批开关', '审批开关', 'BOOL', NULL, 'NONE', NULL, '0', NULL, NULL, '0=二次分配方案提交即生效（系统自动通过全节点留痕，留痕不断链）；1=提交后进入财务复核→领导审核审批流（2026-10-15 复核审批补充需求）', 17, 1);
+
+INSERT INTO param_definitions (id, param_code, param_name, param_group, value_type, unit, dimension_type, options_text, default_value, value_min, value_max, description, sort_order, status) VALUES (18, 'approval.monthly_settlement.enabled', '月度结算审批开关', '审批开关', 'BOOL', NULL, 'NONE', NULL, '0', NULL, NULL, '预留参数：月度结算审批链开关（M3 ④ 月结子块接入时消费）；0=结算生成即生效，1=走财务复核→领导审核审批流', 18, 1);
+
+INSERT INTO param_values (id, param_id, dimension_value, effective_date, value_text, batch_id) VALUES (20, 17, '', '2026-01-01', '0', 1);
+
+INSERT INTO param_values (id, param_id, dimension_value, effective_date, value_text, batch_id) VALUES (21, 18, '', '2026-01-01', '0', 1);
+
+INSERT INTO system_settings (id, company_name, logo_path) VALUES (1, '衍水集团', NULL);
+
+UPDATE alembic_version SET version_num='79bcc5aa98d4' WHERE alembic_version.version_num = '8efc189b131f';
+