diff --git a/backend/alembic/versions/b8c9d0e1f2a3_add_notifications.py b/backend/alembic/versions/b8c9d0e1f2a3_add_notifications.py
new file mode 100644
index 0000000..47cbfc4
--- /dev/null
+++ b/backend/alembic/versions/b8c9d0e1f2a3_add_notifications.py
@@ -0,0 +1,32 @@
+"""add_notifications
+
+Revision ID: b8c9d0e1f2a3
+Revises: a7b8c9d0e1f2
+Create Date: 2026-08-07
+"""
+from typing import Sequence, Union
+from alembic import op
+import sqlalchemy as sa
+
+revision: str = "b8c9d0e1f2a3"
+down_revision: Union[str, None] = "a7b8c9d0e1f2"
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    op.create_table(
+        "notifications",
+        sa.Column("id", sa.UUID(), primary_key=True, server_default=sa.text("gen_random_uuid()")),
+        sa.Column("user_id", sa.String(64), nullable=False, index=True, comment="接收人ID（逻辑外键→老系统）"),
+        sa.Column("title", sa.String(200), nullable=False, comment="通知标题"),
+        sa.Column("content", sa.Text(), nullable=False, comment="通知内容详情"),
+        sa.Column("type", sa.String(20), nullable=False, comment="通知类型: TRANSFER(转交派发) | REJECT(驳回)"),
+        sa.Column("task_id", sa.UUID(), sa.ForeignKey("tasks.id", ondelete="SET NULL"), nullable=True, comment="关联任务ID"),
+        sa.Column("is_read", sa.Boolean(), server_default=sa.text("false"), comment="是否已读"),
+        sa.Column("created_at", sa.DateTime(timezone=True), server_default=sa.func.now(), comment="创建时间"),
+    )
+
+
+def downgrade() -> None:
+    op.drop_table("notifications")
diff --git a/backend/app/api/v1/endpoints/auth.py b/backend/app/api/v1/endpoints/auth.py
index 04e68a5..c6308c3 100644
--- a/backend/app/api/v1/endpoints/auth.py
+++ b/backend/app/api/v1/endpoints/auth.py
@@ -1,20 +1,32 @@
-"""认证 API — 对接 MOM sys_user"""
+"""认证 API — 对接 MOM sys_user + 双 Token 刷新"""
 from fastapi import APIRouter, Depends
-from app.schemas.user import LoginRequest, LoginResponse, UserResponse
-from app.services.auth_service import login, get_current_user
+from app.schemas.user import (
+    LoginRequest,
+    LoginResponse,
+    RefreshRequest,
+    RefreshResponse,
+    UserResponse,
+)
+from app.services.auth_service import login, refresh_access_token, get_current_user
 
 router = APIRouter(prefix="/auth", tags=["认证"])
 
 
 @router.post("/login", response_model=LoginResponse)
 def login_endpoint(data: LoginRequest):
-    """登录 — 验证 MOM sys_user 表，返回 JWT"""
+    """登录 — 验证 MOM sys_user 表，返回 Access + Refresh 双 Token"""
     return login(data.username, data.password)
 
 
+@router.post("/refresh", response_model=RefreshResponse)
+def refresh_endpoint(data: RefreshRequest):
+    """刷新 Access Token — 使用 Refresh Token 换取新的 Access Token"""
+    return refresh_access_token(data.refresh_token)
+
+
 @router.get("/me", response_model=UserResponse)
 def get_me(current_user: dict = Depends(get_current_user)):
-    """获取当前用户信息（从 JWT 解析）"""
+    """获取当前用户信息（从 Access Token 解析）"""
     return UserResponse(
         id=current_user["sub"],
         username=current_user.get("username", ""),
diff --git a/backend/app/api/v1/endpoints/notifications.py b/backend/app/api/v1/endpoints/notifications.py
new file mode 100644
index 0000000..97f82f3
--- /dev/null
+++ b/backend/app/api/v1/endpoints/notifications.py
@@ -0,0 +1,79 @@
+"""通知 API 端点 — 获取列表、标记已读"""
+from __future__ import annotations
+import uuid
+from fastapi import APIRouter, Depends, Query
+from sqlalchemy import select, func
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.core.database import get_db
+from app.models.notification import Notification
+from app.schemas.notification import NotificationResponse, NotificationListResponse
+
+router = APIRouter(prefix="/notifications", tags=["消息通知"])
+
+
+@router.get("/", response_model=NotificationListResponse)
+async def list_notifications(
+    user_id: str = Query(..., description="当前用户ID"),
+    skip: int = Query(0, ge=0),
+    limit: int = Query(20, ge=1, le=100),
+    db: AsyncSession = Depends(get_db),
+):
+    """获取当前用户的通知列表（按时间倒序）"""
+    # 总数
+    count_stmt = select(func.count()).select_from(Notification).where(
+        Notification.user_id == user_id
+    )
+    total_result = await db.execute(count_stmt)
+    total = total_result.scalar() or 0
+
+    # 未读数
+    unread_stmt = select(func.count()).select_from(Notification).where(
+        Notification.user_id == user_id,
+        Notification.is_read.is_(False),
+    )
+    unread_result = await db.execute(unread_stmt)
+    unread_count = unread_result.scalar() or 0
+
+    # 列表
+    stmt = (
+        select(Notification)
+        .where(Notification.user_id == user_id)
+        .order_by(Notification.created_at.desc())
+        .offset(skip)
+        .limit(limit)
+    )
+    result = await db.execute(stmt)
+    notifications = result.scalars().all()
+
+    return NotificationListResponse(
+        notifications=[
+            NotificationResponse.model_validate(n) for n in notifications
+        ],
+        total=total,
+        unread_count=unread_count,
+    )
+
+
+@router.put("/{notification_id}/read", response_model=NotificationResponse)
+async def mark_notification_read(
+    notification_id: str,
+    db: AsyncSession = Depends(get_db),
+):
+    """标记单条通知为已读"""
+    nid = uuid.UUID(notification_id)
+    result = await db.execute(
+        select(Notification).where(Notification.id == nid)
+    )
+    notification = result.scalar_one_or_none()
+    if not notification:
+        from fastapi import HTTPException, status
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail=f"通知不存在: {notification_id}",
+        )
+
+    notification.is_read = True
+    await db.commit()
+    await db.refresh(notification)
+    return NotificationResponse.model_validate(notification)
diff --git a/backend/app/api/v1/endpoints/products.py b/backend/app/api/v1/endpoints/products.py
index cd46ab0..e594659 100644
--- a/backend/app/api/v1/endpoints/products.py
+++ b/backend/app/api/v1/endpoints/products.py
@@ -62,11 +62,15 @@ async def scan_product(
 @router.get("/", response_model=list[ProductResponse])
 async def list_products(
     skip: int = Query(0, ge=0, description="跳过条数"),
-    limit: int = Query(50, ge=1, le=200, description="返回条数"),
+    limit: int = Query(50, ge=1, le=1000, description="返回条数"),
+    keyword: str | None = Query(None, description="多维搜索: 产品身份证/订单号/规格型号"),
+    status: str | None = Query(None, description="产品状态筛选: PENDING/WIP/COMPLETED/ARCHIVED"),
     db: AsyncSession = Depends(get_db),
 ):
-    """获取产品列表"""
-    return await product_service.get_all_products(db, skip=skip, limit=limit)
+    """获取产品列表 — 支持 keyword 搜索 + 状态筛选"""
+    return await product_service.get_all_products(
+        db, skip=skip, limit=limit, keyword=keyword, status_filter=status,
+    )
 
 
 @router.get("/{product_id}", response_model=ProductResponse)
diff --git a/backend/app/api/v1/router.py b/backend/app/api/v1/router.py
index bd35844..f695c3f 100644
--- a/backend/app/api/v1/router.py
+++ b/backend/app/api/v1/router.py
@@ -10,6 +10,7 @@ from app.api.v1.endpoints.materials import router as materials_router
 from app.api.v1.endpoints.users import router as users_router
 from app.api.v1.endpoints.upload import router as upload_router
 from app.api.v1.endpoints.records import router as records_router
+from app.api.v1.endpoints.notifications import router as notifications_router
 
 api_router = APIRouter()
 
@@ -23,3 +24,4 @@ api_router.include_router(materials_router)
 api_router.include_router(users_router)
 api_router.include_router(upload_router)
 api_router.include_router(records_router)
+api_router.include_router(notifications_router)
diff --git a/backend/app/core/config.py b/backend/app/core/config.py
index f07a141..00586af 100644
--- a/backend/app/core/config.py
+++ b/backend/app/core/config.py
@@ -9,7 +9,8 @@ class Settings(BaseSettings):
 
     # ---- JWT ----
     SECRET_KEY: str = "change-me-in-production"
-    ACCESS_TOKEN_EXPIRE_MINUTES: int = 30
+    ACCESS_TOKEN_EXPIRE_MINUTES: int = 120      # Access Token: 2 小时
+    REFRESH_TOKEN_EXPIRE_DAYS: int = 7           # Refresh Token: 7 天
 
     # ---- 调试 ----
     DEBUG: bool = True
diff --git a/backend/app/core/security.py b/backend/app/core/security.py
index ffeb77c..a080707 100644
--- a/backend/app/core/security.py
+++ b/backend/app/core/security.py
@@ -1,4 +1,4 @@
-"""安全模块 — JWT Token 生成与验证"""
+"""安全模块 — JWT Token 生成与验证（双 Token 架构）"""
 from datetime import timedelta
 from jose import JWTError, jwt
 from passlib.context import CryptContext
@@ -9,17 +9,36 @@ pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
 
 ALGORITHM = "HS256"
 
+# Token 类型声明
+TOKEN_TYPE_ACCESS = "access"
+TOKEN_TYPE_REFRESH = "refresh"
+
 
 def create_access_token(data: dict, expires_delta: timedelta | None = None) -> str:
-    """生成 JWT Access Token"""
+    """生成 JWT Access Token（2 小时有效）"""
     to_encode = data.copy()
     expire = get_beijing_time() + (
         expires_delta or timedelta(minutes=settings.ACCESS_TOKEN_EXPIRE_MINUTES)
     )
-    to_encode.update({"exp": expire})
+    to_encode.update({"exp": expire, "type": TOKEN_TYPE_ACCESS})
     return jwt.encode(to_encode, settings.SECRET_KEY, algorithm=ALGORITHM)
 
 
+def create_refresh_token(data: dict, expires_delta: timedelta | None = None) -> str:
+    """生成 JWT Refresh Token（7 天有效，仅用于刷新 Access Token）"""
+    to_encode = data.copy()
+    expire = get_beijing_time() + (
+        expires_delta or timedelta(days=settings.REFRESH_TOKEN_EXPIRE_DAYS)
+    )
+    to_encode.update({"exp": expire, "type": TOKEN_TYPE_REFRESH})
+    return jwt.encode(to_encode, settings.SECRET_KEY, algorithm=ALGORITHM)
+
+
+def decode_token(token: str) -> dict:
+    """解码并验证 JWT Token，返回 payload"""
+    return jwt.decode(token, settings.SECRET_KEY, algorithms=[ALGORITHM])
+
+
 def verify_password(plain_password: str, hashed_password: str) -> bool:
     """验证明文密码 vs 哈希密码"""
     return pwd_context.verify(plain_password, hashed_password)
diff --git a/backend/app/models/__init__.py b/backend/app/models/__init__.py
index d36d537..5b87c0b 100644
--- a/backend/app/models/__init__.py
+++ b/backend/app/models/__init__.py
@@ -4,6 +4,7 @@ from app.models.production_order import ProductionOrder
 from app.models.product import Product
 from app.models.task import Task, TaskRecord
 from app.models.task_log import TaskLog
+from app.models.notification import Notification
 __all__ = [
     "Base",
     "ProductionOrder",
@@ -11,4 +12,5 @@ __all__ = [
     "Task",
     "TaskRecord",
     "TaskLog",
+    "Notification",
 ]
diff --git a/backend/app/models/notification.py b/backend/app/models/notification.py
new file mode 100644
index 0000000..4ae76f5
--- /dev/null
+++ b/backend/app/models/notification.py
@@ -0,0 +1,52 @@
+"""通知模型 — 任务转交/驳回等事件的消息提醒"""
+import uuid
+from datetime import datetime
+from sqlalchemy import String, DateTime, Boolean, ForeignKey, Text
+from sqlalchemy.dialects.postgresql import UUID
+from sqlalchemy.orm import Mapped, mapped_column
+
+from app.models.base import Base
+from app.core.time_utils import get_beijing_time
+
+# 通知类型常量
+NOTIFY_TRANSFER = "TRANSFER"   # 新任务派发/转交
+NOTIFY_REJECT = "REJECT"       # 品质驳回
+
+
+class Notification(Base):
+    __tablename__ = "notifications"
+
+    id: Mapped[uuid.UUID] = mapped_column(
+        UUID(as_uuid=True), primary_key=True, default=uuid.uuid4,
+    )
+
+    user_id: Mapped[str] = mapped_column(
+        String(64), nullable=False, index=True, comment="接收人ID（逻辑外键→老系统）",
+    )
+
+    title: Mapped[str] = mapped_column(
+        String(200), nullable=False, comment="通知标题",
+    )
+
+    content: Mapped[str] = mapped_column(
+        Text, nullable=False, comment="通知内容详情",
+    )
+
+    type: Mapped[str] = mapped_column(
+        String(20), nullable=False, comment="通知类型: TRANSFER(转交派发) | REJECT(驳回)",
+    )
+
+    task_id: Mapped[uuid.UUID | None] = mapped_column(
+        UUID(as_uuid=True), ForeignKey("tasks.id", ondelete="SET NULL"), nullable=True, comment="关联任务ID",
+    )
+
+    is_read: Mapped[bool] = mapped_column(
+        Boolean, default=False, comment="是否已读",
+    )
+
+    created_at: Mapped[datetime] = mapped_column(
+        DateTime(timezone=True), default=get_beijing_time, comment="创建时间",
+    )
+
+    def __repr__(self) -> str:
+        return f"<Notification {self.type} → {self.user_id}>"
diff --git a/backend/app/models/task.py b/backend/app/models/task.py
index 486a734..6e458e4 100644
--- a/backend/app/models/task.py
+++ b/backend/app/models/task.py
@@ -84,6 +84,7 @@ class Task(Base):
     )
     child_tasks: Mapped[list["Task"]] = relationship(
         "Task", back_populates="parent_task", lazy="selectin",
+        order_by="Task.created_at",
     )
     records: Mapped[list["TaskRecord"]] = relationship(
         "TaskRecord", back_populates="task", lazy="selectin", cascade="all, delete-orphan",
diff --git a/backend/app/schemas/notification.py b/backend/app/schemas/notification.py
new file mode 100644
index 0000000..7fb565c
--- /dev/null
+++ b/backend/app/schemas/notification.py
@@ -0,0 +1,26 @@
+"""通知 Pydantic Schema"""
+from __future__ import annotations
+import uuid
+from datetime import datetime
+from pydantic import BaseModel, Field
+
+
+class NotificationResponse(BaseModel):
+    """通知列表响应"""
+    id: uuid.UUID
+    user_id: str
+    title: str
+    content: str
+    type: str
+    task_id: uuid.UUID | None = None
+    is_read: bool
+    created_at: datetime
+
+    model_config = {"from_attributes": True}
+
+
+class NotificationListResponse(BaseModel):
+    """通知分页列表"""
+    notifications: list[NotificationResponse]
+    total: int
+    unread_count: int
diff --git a/backend/app/schemas/task.py b/backend/app/schemas/task.py
index 246d85c..4e524ee 100644
--- a/backend/app/schemas/task.py
+++ b/backend/app/schemas/task.py
@@ -110,6 +110,7 @@ class TaskSummaryResponse(BaseModel):
     status: str
     notify_parent_on_complete: bool
     is_rework: bool = False
+    task_type: str | None = None
     remark: str | None = None
     reject_reason: str | None = None
     received_at: datetime | None = None
diff --git a/backend/app/schemas/user.py b/backend/app/schemas/user.py
index c12d041..fbad24b 100644
--- a/backend/app/schemas/user.py
+++ b/backend/app/schemas/user.py
@@ -1,4 +1,4 @@
-"""用户 Schemas — 对接 MOM sys_user 表"""
+"""用户 Schemas — 对接 MOM sys_user 表 + 双 Token"""
 from pydantic import BaseModel, Field
 
 
@@ -20,5 +20,15 @@ class UserResponse(BaseModel):
 
 class LoginResponse(BaseModel):
     access_token: str
+    refresh_token: str
     token_type: str = "bearer"
     user: UserResponse
+
+
+class RefreshRequest(BaseModel):
+    refresh_token: str = Field(..., description="Refresh Token")
+
+
+class RefreshResponse(BaseModel):
+    access_token: str
+    token_type: str = "bearer"
diff --git a/backend/app/services/auth_service.py b/backend/app/services/auth_service.py
index 94820cc..606785e 100644
--- a/backend/app/services/auth_service.py
+++ b/backend/app/services/auth_service.py
@@ -1,11 +1,18 @@
-"""认证服务 — 对接 MOM 系统 sys_user 表 + Track 自有 JWT"""
+"""认证服务 — 对接 MOM 系统 sys_user 表 + Track 自有 JWT（双 Token 架构）"""
 from fastapi import HTTPException, status, Depends
 from fastapi.security import HTTPBearer, HTTPAuthorizationCredentials
 from jose import JWTError, jwt
 from werkzeug.security import check_password_hash
 
 from app.core.config import settings
-from app.core.security import create_access_token, ALGORITHM
+from app.core.security import (
+    create_access_token,
+    create_refresh_token,
+    decode_token,
+    ALGORITHM,
+    TOKEN_TYPE_ACCESS,
+    TOKEN_TYPE_REFRESH,
+)
 from app.core.mom_database import MomSessionLocal
 from app.schemas.user import LoginResponse, UserResponse
 
@@ -13,15 +20,15 @@ security = HTTPBearer()
 
 
 def login(username: str, password: str) -> LoginResponse:
-    """登录 — 查询 MOM 数据库 sys_user 表验证"""
+    """登录 — 签发双 Token（Access + Refresh）"""
     db = MomSessionLocal()
     try:
         # 1. 超级管理员硬编码（和 MOM 系统一致）
         if username == "IRIS" and password == "123321":
+            token_data = {"sub": "0", "role": "SUPER_ADMIN", "username": "IRIS", "display_name": "超级管理员"}
             return LoginResponse(
-                access_token=create_access_token(
-                    data={"sub": "0", "role": "SUPER_ADMIN"}
-                ),
+                access_token=create_access_token(data=token_data),
+                refresh_token=create_refresh_token(data=token_data),
                 user=UserResponse(
                     id="0",
                     username="IRIS",
@@ -60,17 +67,16 @@ def login(username: str, password: str) -> LoginResponse:
         # 4. 解析 display_name（"张三/zhangsan01" → "张三"）
         display_name = full_username.split("/")[0] if "/" in full_username else full_username
 
-        token = create_access_token(
-            data={
-                "sub": str(user_id),
-                "role": role or "operator",
-                "username": username,
-                "display_name": display_name,
-            }
-        )
+        token_data = {
+            "sub": str(user_id),
+            "role": role or "operator",
+            "username": username,
+            "display_name": display_name,
+        }
 
         return LoginResponse(
-            access_token=token,
+            access_token=create_access_token(data=token_data),
+            refresh_token=create_refresh_token(data=token_data),
             user=UserResponse(
                 id=str(user_id),
                 username=username,
@@ -83,16 +89,60 @@ def login(username: str, password: str) -> LoginResponse:
         db.close()
 
 
+def refresh_access_token(refresh_token: str) -> dict:
+    """
+    使用 Refresh Token 换取新的 Access Token。
+    校验：
+    1. Token 签名是否有效
+    2. Token type 是否为 "refresh"
+    3. Token 是否未过期
+    """
+    try:
+        payload = decode_token(refresh_token)
+    except JWTError:
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="Refresh Token 无效或已过期，请重新登录",
+        )
+
+    # 校验 token 类型
+    if payload.get("type") != TOKEN_TYPE_REFRESH:
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="无效的 Token 类型，仅接受 Refresh Token",
+        )
+
+    # 提取用户信息，签发新的 Access Token
+    access_token = create_access_token(
+        data={
+            "sub": payload.get("sub"),
+            "role": payload.get("role", "operator"),
+            "username": payload.get("username", ""),
+            "display_name": payload.get("display_name", ""),
+        }
+    )
+
+    return {"access_token": access_token, "token_type": "bearer"}
+
+
 async def get_current_user(
     credentials: HTTPAuthorizationCredentials = Depends(security),
 ) -> dict:
-    """从 Bearer Token 解析当前用户（不查数据库，直接解 JWT）"""
+    """从 Bearer Token 解析当前用户（仅接受 Access Token）"""
     token = credentials.credentials
     try:
-        payload = jwt.decode(token, settings.SECRET_KEY, algorithms=[ALGORITHM])
+        payload = decode_token(token)
         user_id = payload.get("sub")
         if not user_id:
             raise HTTPException(status_code=401, detail="无效的 Token")
+
+        # 校验：仅接受 access token
+        if payload.get("type") == TOKEN_TYPE_REFRESH:
+            raise HTTPException(
+                status_code=401,
+                detail="请使用 Access Token 访问 API，Refresh Token 仅用于刷新",
+            )
+
         return payload
     except JWTError:
         raise HTTPException(status_code=401, detail="无效的 Token")
diff --git a/backend/app/services/product_service.py b/backend/app/services/product_service.py
index 6407d2e..bccf6ba 100644
--- a/backend/app/services/product_service.py
+++ b/backend/app/services/product_service.py
@@ -2,7 +2,7 @@
 from __future__ import annotations
 import uuid
 from fastapi import HTTPException, status
-from sqlalchemy import select
+from sqlalchemy import select, or_, cast, String
 from sqlalchemy.ext.asyncio import AsyncSession
 from sqlalchemy.orm import selectinload
 
@@ -34,6 +34,7 @@ def _task_to_response(task: Task) -> TaskResponse:
         status=task.status,
         notify_parent_on_complete=task.notify_parent_on_complete,
         is_rework=task.is_rework,
+        task_type=task.task_type,
         remark=task.remark,
         reject_reason=task.reject_reason,
         received_at=task.received_at,
@@ -277,15 +278,68 @@ async def update_overall_status(db: AsyncSession, serial_number: str, status_val
     return await get_product_by_serial(db, serial_number)
 
 
-async def get_all_products(db: AsyncSession, skip: int = 0, limit: int = 50) -> list[ProductResponse]:
-    """获取产品列表"""
-    result = await db.execute(
-        select(Product)
-        .options(selectinload(Product.order))
-        .offset(skip)
-        .limit(limit)
-        .order_by(Product.created_at.desc())
-    )
+async def get_all_products(
+    db: AsyncSession,
+    skip: int = 0,
+    limit: int = 50,
+    keyword: str | None = None,
+    status_filter: str | None = None,
+) -> list[ProductResponse]:
+    """
+    获取产品列表 — 支持多维 keyword 搜索 + 状态筛选
+
+    keyword: 同时模糊匹配 serial_number (产品身份证)、material_name/id (规格型号)、order_no (订单号)
+    status_filter: 按产品状态过滤 (如 PENDING / WIP / COMPLETED / ARCHIVED)
+    """
+    stmt = select(Product).options(selectinload(Product.order))
+
+    # keyword 多字段 OR 模糊搜索
+    if keyword and keyword.strip():
+        kw = f"%{keyword.strip()}%"
+        stmt = stmt.outerjoin(ProductionOrder, Product.order_id == ProductionOrder.id).where(
+            or_(
+                Product.serial_number.ilike(kw),
+                Product.material_name.ilike(kw),
+                cast(Product.material_id, String).ilike(kw),
+                Product.spec_model.ilike(kw),
+                ProductionOrder.order_no.ilike(kw),
+            )
+        ).distinct()
+
+    # 状态筛选 — 大小写不敏感，支持组合过滤
+    if status_filter and status_filter.strip():
+        from sqlalchemy import func
+        sf = status_filter.strip().upper()
+        if sf == "DONE":
+            # "已完成" 匹配 COMPLETED 或 ARCHIVED
+            stmt = stmt.where(
+                or_(
+                    func.upper(Product.status) == "COMPLETED",
+                    func.upper(Product.status) == "ARCHIVED",
+                )
+            )
+        elif sf == "PENDING":
+            # "待流转" — 产品状态 PENDING 且所有顶层任务均未分配人
+            stmt = (
+                stmt.outerjoin(Task, Task.product_id == Product.id)
+                .where(func.upper(Product.status) == "PENDING")
+                .where(Task.assignee_id.is_(None))
+                .distinct()
+            )
+        elif sf == "PENDING_ASSIGNED":
+            # "待接收" — 产品状态 PENDING 但已有任务被分配（等待工人扫码）
+            stmt = (
+                stmt.outerjoin(Task, Task.product_id == Product.id)
+                .where(func.upper(Product.status) == "PENDING")
+                .where(Task.assignee_id.isnot(None))
+                .distinct()
+            )
+        else:
+            stmt = stmt.where(func.upper(Product.status) == sf)
+
+    stmt = stmt.offset(skip).limit(limit).order_by(Product.created_at.desc())
+
+    result = await db.execute(stmt)
     products = result.scalars().all()
     return [
         ProductResponse(
diff --git a/backend/app/services/task_service.py b/backend/app/services/task_service.py
index 0cd6df1..dfe428a 100644
--- a/backend/app/services/task_service.py
+++ b/backend/app/services/task_service.py
@@ -7,6 +7,7 @@ from sqlalchemy.ext.asyncio import AsyncSession
 from sqlalchemy.orm import selectinload
 
 from app.models.task import Task, TaskRecord, TASK_STATUS_PENDING, TASK_STATUS_WIP, TASK_STATUS_COMPLETED, TASK_STATUS_REJECTED, TASK_STATUS_CANCELED, TASK_STATUS_ARCHIVED
+from app.models.notification import Notification, NOTIFY_TRANSFER, NOTIFY_REJECT
 from app.core.time_utils import get_beijing_time
 from app.models.product import Product
 from app.models.task_log import TaskLog
@@ -288,6 +289,12 @@ async def end_task(
     """
     task = await _get_task_or_404(db, task_id)
 
+    # 校验：仅 SPAWN 协助分支可以结束，主分支（TRANSFER/RECOVERY）不能通过此接口终止
+    if not task.parent_task_id:
+        raise HTTPException(status_code=409, detail="根任务无法结束，请使用完工转交")
+    if task.task_type != "SPAWN":
+        raise HTTPException(status_code=409, detail="仅协助分支可以结束，主分支请使用完工转交")
+
     # 校验：必须等待所有协助分支完成
     await _check_children_done(db, task_id)
 
@@ -562,7 +569,7 @@ async def reject_task(
         task_name=task.task_name,
         assignee_id=rework_assignee_id,
         status=TASK_STATUS_PENDING,
-        task_type="TRANSFER",
+        task_type=task.task_type,  # 🚀 继承被驳回任务的基因：主线→主线，协助→协助
         notify_parent_on_complete=task.notify_parent_on_complete,
         is_rework=True,
     )
@@ -576,6 +583,24 @@ async def reject_task(
         remark=f"返工任务（驳回自「{task.task_name}」，原因: {request.reason}），分配给 {rework_assignee_id}",
     )
 
+    # 🔔 通知：品质驳回
+    product_sn = ""
+    try:
+        product_result = await db.execute(select(Product).where(Product.id == task.product_id))
+        p = product_result.scalar_one_or_none()
+        if p:
+            product_sn = p.serial_number or ""
+    except Exception:
+        pass
+    if rework_assignee_id:
+        db.add(Notification(
+            user_id=rework_assignee_id,
+            title="🔴 品质驳回提醒",
+            content=f"产品 [{product_sn}] 的「{task.task_name}」被驳回，原因: {request.reason}",
+            type=NOTIFY_REJECT,
+            task_id=rework_task.id,
+        ))
+
     await db.commit()
     await db.refresh(task)
 
@@ -697,6 +722,21 @@ async def transfer_task(
             operator_id=operator_id,
             remark=request.note or f"由任务「{task.task_name}」裂变转交创建，分配给 {nt.assignee_id}",
         )
+        # 🔔 通知：新任务派发
+        if nt.assignee_id:
+            product_sn = ""
+            try:
+                if product:
+                    product_sn = product.serial_number or ""
+            except Exception:
+                pass
+            db.add(Notification(
+                user_id=nt.assignee_id,
+                title=f"🟢 新任务派发",
+                content=f"产品 [{product_sn}] 的「{nt.task_name}」任务已分配给你",
+                type=NOTIFY_TRANSFER,
+                task_id=nt.id,
+            ))
 
     # --- 更新 Product 的 current_location_id ---
     product_result = await db.execute(