diff --git a/src/models/database.py b/src/models/database.py
new file mode 100644
index 0000000..dc3721c
--- /dev/null
+++ b/src/models/database.py
@@ -0,0 +1,874 @@
+# models/database.py
+from sqlalchemy import Column, Integer, String, Text, DateTime, Date, JSON, LargeBinary, Boolean, Float, ForeignKey, UniqueConstraint, Numeric
+from sqlalchemy.ext.declarative import declarative_base
+from sqlalchemy.sql import func
+from sqlalchemy.orm import relationship
+from datetime import datetime, date
+
+Base = declarative_base()
+
+class User(Base):
+    """用户表"""
+    __tablename__ = "users"
+    __excluded_fields__ = {'hashed_password'}
+    
+    id = Column(Integer, primary_key=True, index=True)
+    username = Column(String(50), unique=True, index=True, nullable=False)
+    email = Column(String(255), unique=True, index=True, nullable=False)
+    hashed_password = Column(String(255), nullable=False)
+    full_name = Column(String(100))
+    is_active = Column(Boolean, default=True)
+    created_at = Column(DateTime, default=func.now())
+    last_login = Column(DateTime, nullable=True)
+    
+    stp_files = relationship("STPFile", back_populates="user")
+    user_roles = relationship("UserRole", back_populates="user", cascade="all, delete-orphan")
+    
+    @property
+    def roles(self):
+        return [ur.role for ur in self.user_roles]
+    
+    @property
+    def is_superuser(self):
+        return any(r.code == 'admin' for r in self.roles)
+    
+    def has_permission(self, permission_code: str) -> bool:
+        if self.is_superuser:
+            return True
+        for role in self.roles:
+            for perm in role.permissions:
+                if perm.code == permission_code:
+                    return True
+        return False
+
+    def safe_dict(self):
+        return {k: v for k, v in self.__dict__.items()
+                if not k.startswith('_') and k not in self.__excluded_fields__}
+
+    def __repr__(self):
+        return f"<User(id={self.id}, username='{self.username}')>"
+
+
+class Role(Base):
+    """角色表"""
+    __tablename__ = "roles"
+    
+    id = Column(Integer, primary_key=True, index=True)
+    code = Column(String(50), unique=True, index=True, nullable=False)
+    name = Column(String(100), nullable=False)
+    description = Column(Text, nullable=True)
+    is_system = Column(Boolean, default=False)
+    created_at = Column(DateTime, default=func.now())
+    
+    user_roles = relationship("UserRole", back_populates="role", cascade="all, delete-orphan")
+    role_permissions = relationship("RolePermission", back_populates="role", cascade="all, delete-orphan")
+    
+    @property
+    def permissions(self):
+        return [rp.permission for rp in self.role_permissions]
+    
+    def __repr__(self):
+        return f"<Role(code='{self.code}', name='{self.name}')>"
+
+
+class Permission(Base):
+    """权限表"""
+    __tablename__ = "permissions"
+    
+    id = Column(Integer, primary_key=True, index=True)
+    code = Column(String(100), unique=True, index=True, nullable=False)
+    name = Column(String(100), nullable=False)
+    module = Column(String(50), nullable=True)
+    description = Column(Text, nullable=True)
+    created_at = Column(DateTime, default=func.now())
+    
+    role_permissions = relationship("RolePermission", back_populates="permission", cascade="all, delete-orphan")
+    
+    def __repr__(self):
+        return f"<Permission(code='{self.code}', name='{self.name}')>"
+
+
+class UserRole(Base):
+    """用户角色关联表"""
+    __tablename__ = "user_roles"
+    
+    id = Column(Integer, primary_key=True, index=True)
+    user_id = Column(Integer, ForeignKey("users.id"), nullable=False, index=True)
+    role_id = Column(Integer, ForeignKey("roles.id"), nullable=False, index=True)
+    created_at = Column(DateTime, default=func.now())
+    
+    user = relationship("User", back_populates="user_roles")
+    role = relationship("Role", back_populates="user_roles")
+    
+    def __repr__(self):
+        return f"<UserRole(user_id={self.user_id}, role_id={self.role_id})>"
+
+
+class RolePermission(Base):
+    """角色权限关联表"""
+    __tablename__ = "role_permissions"
+    
+    id = Column(Integer, primary_key=True, index=True)
+    role_id = Column(Integer, ForeignKey("roles.id"), nullable=False, index=True)
+    permission_id = Column(Integer, ForeignKey("permissions.id"), nullable=False, index=True)
+    created_at = Column(DateTime, default=func.now())
+    
+    role = relationship("Role", back_populates="role_permissions")
+    permission = relationship("Permission", back_populates="role_permissions")
+    
+    def __repr__(self):
+        return f"<RolePermission(role_id={self.role_id}, permission_id={self.permission_id})>"
+
+class STPFile(Base):
+    """STP源文件元数据表 - 支持同一文件多次上传"""
+    __tablename__ = "stp_files"
+    
+    id = Column(Integer, primary_key=True, index=True)
+    user_id = Column(Integer, ForeignKey("users.id"), nullable=True, index=True)
+    
+    # 对象存储信息
+    object_key = Column(String(500), nullable=False, index=True)  # MinIO对象键
+    storage_bucket = Column(String(100), nullable=False)       # 存储桶名称
+    object_url = Column(String(1000), nullable=True)          # 预签名URL（可选）
+    
+    # 文件信息
+    original_filename = Column(String(255), nullable=False, index=True)  # 添加索引支持按文件名查询
+    file_size = Column(Integer, nullable=False)
+    file_hash = Column(String(64), index=True)  # 移除unique约束，允许同一文件多次上传
+    mime_type = Column(String(50), default="application/octet-stream")
+    
+    # 上传批次标识 - 用于区分同一文件的多次上传
+    upload_batch = Column(String(36), index=True)  # UUID批次号
+    
+    # 时间戳
+    upload_time = Column(DateTime, default=func.now())
+    processed_time = Column(DateTime, nullable=True)
+    
+    # 状态
+    status = Column(String(20), default="pending", index=True)  # pending, processing, completed, failed
+    error_message = Column(Text, nullable=True)
+    
+    # 分析摘要 - 快速查询字段
+    volume = Column(Float, nullable=True)  # 体积 mm³
+    surface_area = Column(Float, nullable=True)  # 表面积 mm²
+    product_weight = Column(Float, nullable=True)  # 产品重量 g
+    
+    # 保留旧字段以兼容
+    file_path = Column(String(500), nullable=True)  # 本地路径（已弃用）
+    file_content = Column(LargeBinary, nullable=True)  # 本地存储（已弃用）
+    filename = Column(String(255), nullable=True)  # 已弃用
+    
+    # 关联关系
+    user = relationship("User", back_populates="stp_files")
+    geometry_data = relationship("GeometryData", back_populates="stp_file", uselist=False)
+    mesh_data = relationship("MeshData", back_populates="stp_file", uselist=False)
+    mold_cavity_data = relationship("MoldCavityData", back_populates="stp_file", uselist=False)
+    html_file = relationship("HTMLFile", back_populates="stp_file", uselist=False)
+    analysis_metrics = relationship("AnalysisMetrics", back_populates="stp_file", uselist=False)
+    feature_detections = relationship("FeatureDetection", back_populates="stp_file")
+    design_recommendations = relationship("DesignRecommendation", back_populates="stp_file")
+    processing_tasks = relationship("ProcessingTask", back_populates="stp_file")
+    
+    def __repr__(self):
+        return f"<STPFile(id={self.id}, original_filename='{self.original_filename}', status='{self.status}')>"
+
+class GeometryData(Base):
+    """几何数据JSON元数据表"""
+    __tablename__ = "geometry_data"
+    
+    id = Column(Integer, primary_key=True, index=True)
+    stp_file_id = Column(Integer, ForeignKey("stp_files.id"), nullable=False, index=True)
+    
+    # 对象存储信息
+    object_key = Column(String(500), nullable=False)
+    storage_bucket = Column(String(100), nullable=False)
+    object_url = Column(String(1000), nullable=True)
+    
+    # 分析方法
+    analysis_method = Column(String(50), default="pythonocc")  # pythonocc, simulated
+    
+    # 时间戳
+    created_time = Column(DateTime, default=func.now())
+    
+    # 几何属性摘要（便于快速查询）
+    volume = Column(Float, nullable=True)
+    surface_area = Column(Float, nullable=True)
+    bounding_box_min = Column(JSON, nullable=True)
+    bounding_box_max = Column(JSON, nullable=True)
+    center_of_mass = Column(JSON, nullable=True)
+    
+    # 拓扑信息
+    topology_faces = Column(Integer, nullable=True)
+    topology_edges = Column(Integer, nullable=True)
+    topology_vertices = Column(Integer, nullable=True)
+    
+    # 关联关系
+    stp_file = relationship("STPFile", back_populates="geometry_data")
+    
+    def __repr__(self):
+        return f"<GeometryData(id={self.id}, stp_file_id={self.stp_file_id})>"
+
+
+class MeshData(Base):
+    """网格数据JSON元数据表（详细网格存 RustFS，PostgreSQL 存摘要）"""
+    __tablename__ = "mesh_data"
+
+    id = Column(Integer, primary_key=True, index=True)
+    stp_file_id = Column(Integer, ForeignKey("stp_files.id"), nullable=False, index=True)
+
+    # 对象存储信息
+    object_key = Column(String(500), nullable=False)
+    storage_bucket = Column(String(100), nullable=False)
+    object_url = Column(String(1000), nullable=True)
+
+    # 生成设置
+    quality = Column(String(20), default="medium")  # low / medium / high
+
+    # 网格规模信息
+    vertex_count = Column(Integer, nullable=True)
+    face_count = Column(Integer, nullable=True)
+    point_count = Column(Integer, nullable=True)  # 采样点云数量
+
+    # 网格边界框（便于快速查询）
+    bounding_box_min = Column(JSON, nullable=True)
+    bounding_box_max = Column(JSON, nullable=True)
+
+    # 时间戳
+    created_time = Column(DateTime, default=func.now())
+
+    # 关联关系
+    stp_file = relationship("STPFile", back_populates="mesh_data")
+
+    def __repr__(self):
+        return f"<MeshData(id={self.id}, stp_file_id={self.stp_file_id}, quality='{self.quality}')>"
+
+class HTMLFile(Base):
+    """网页文件元数据表"""
+    __tablename__ = "html_files"
+    
+    id = Column(Integer, primary_key=True, index=True)
+    stp_file_id = Column(Integer, ForeignKey("stp_files.id"), nullable=False, index=True)
+    
+    # 对象存储信息
+    object_key = Column(String(500), nullable=False)
+    storage_bucket = Column(String(100), nullable=False)
+    object_url = Column(String(1000), nullable=True)
+    
+    # 文件信息
+    filename = Column(String(255), nullable=False)
+    generated_time = Column(DateTime, default=func.now())
+    
+    # 可视化相关元数据
+    visualization_type = Column(String(50), default="3d_viewer")
+    has_interactive_elements = Column(Boolean, default=True)
+    
+    # 保留旧字段以兼容
+    file_path = Column(String(500), nullable=True)
+    html_content = Column(Text, nullable=True)
+    
+    # 关联关系
+    stp_file = relationship("STPFile", back_populates="html_file")
+    
+    def __repr__(self):
+        return f"<HTMLFile(id={self.id}, stp_file_id={self.stp_file_id}, object_key='{self.object_key}')>"
+
+class ProcessingTask(Base):
+    """处理任务记录表"""
+    __tablename__ = "processing_tasks"
+    
+    id = Column(Integer, primary_key=True, index=True)
+    task_id = Column(String(36), unique=True, index=True, nullable=False)
+    stp_file_id = Column(Integer, ForeignKey("stp_files.id"), nullable=False, index=True)
+    
+    # 任务类型和状态
+    task_type = Column(String(50), default="stp_parsing")  # stp_parsing, geometry_analysis, mold_generation
+    status = Column(String(20), default="pending")  # pending, processing, completed, failed
+    
+    # 时间戳
+    created_time = Column(DateTime, default=func.now())
+    started_time = Column(DateTime, nullable=True)
+    completed_time = Column(DateTime, nullable=True)
+    
+    # 处理进度
+    progress = Column(Integer, default=0)  # 0-100
+    current_step = Column(String(100), nullable=True)
+    
+    # 错误信息
+    error_message = Column(Text, nullable=True)
+    error_stack = Column(Text, nullable=True)
+    
+    # 处理参数
+    parameters = Column(JSON, nullable=True)  # 任务参数
+    
+    # 关联关系
+    stp_file = relationship("STPFile", back_populates="processing_tasks")
+
+    def __repr__(self):
+        return f"<ProcessingTask(id={self.id}, task_id='{self.task_id}', status='{self.status}')>"
+
+class MoldCavityData(Base):
+    """模具型腔数据元数据表"""
+    __tablename__ = "mold_cavity_data"
+
+    id = Column(Integer, primary_key=True, index=True)
+    stp_file_id = Column(Integer, ForeignKey("stp_files.id"), nullable=False, index=True)
+    
+    # 对象存储信息
+    detailed_object_key = Column(String(500), nullable=False)  # 完整三维数据
+    storage_bucket = Column(String(100), nullable=False)
+    
+    # 模具类型和材料
+    mold_material = Column(String(100), default="Aluminum Alloy 7075")
+    mold_type = Column(String(50), default="single_cavity")  # single_cavity, multi_cavity
+    
+    # 工艺参数
+    shrinkage_rate = Column(Float, nullable=False)
+    draft_angle = Column(Float, nullable=False)
+    parting_line_length = Column(Float, nullable=True)
+    
+    # 生成时间
+    generated_time = Column(DateTime, default=func.now())
+    
+    # 关键信息摘要（快速查询字段）
+    cavity_key_info = Column(JSON, nullable=True)  # 完整关键信息
+    
+    # 提取的字段（便于查询和排序）
+    mold_size_length = Column(Float, nullable=True)
+    mold_size_width = Column(Float, nullable=True)
+    mold_size_height = Column(Float, nullable=True)
+    estimated_clamping_force = Column(String(50), nullable=True)
+    product_weight = Column(String(50), nullable=True)
+    product_volume = Column(Float, nullable=True)
+    wall_thickness_range = Column(String(50), nullable=True)
+    complexity_score = Column(Float, nullable=True)
+    
+    # 质量评估
+    weld_line_risk = Column(String(50), nullable=True)  # 熔接痕风险
+    sink_mark_risk = Column(String(50), nullable=True)   # 缩痕风险
+    warpage_risk = Column(String(50), nullable=True)     # 翘曲风险
+
+    # 多方案可信化摘要（第1周阶段1）
+    best_scheme_id = Column(String(64), nullable=True, index=True)
+    confidence_score = Column(Float, nullable=True)
+    is_fallback = Column(Boolean, nullable=True, index=True)
+    fallback_reason = Column(Text, nullable=True)
+    
+    # 关联关系
+    stp_file = relationship("STPFile", back_populates="mold_cavity_data")
+    
+    def __repr__(self):
+        return f"<MoldCavityData(stp_file_id={self.stp_file_id}, mold_material='{self.mold_material}')>"
+
+
+class FeatureDetection(Base):
+    """特征检测结果表"""
+    __tablename__ = "feature_detections"
+    
+    id = Column(Integer, primary_key=True, index=True)
+    stp_file_id = Column(Integer, ForeignKey("stp_files.id"), nullable=False, index=True)
+    
+    # 特征信息
+    feature_type = Column(String(50), nullable=False, index=True)  # thin_wall, thick_wall, wall_non_uniform, rib, boss, draft_angle, high_curvature, fillet
+    confidence = Column(Float, nullable=False)  # 0.0 - 1.0
+    
+    # 位置和尺寸
+    location = Column(JSON, nullable=True)  # [x, y, z]
+    dimensions = Column(JSON, nullable=True)  # [length, width, height]
+    
+    # 特征参数
+    parameters = Column(JSON, nullable=True)  # 自定义参数
+    
+    # 检测时间
+    detected_at = Column(DateTime, default=func.now())
+    
+    # 关联的几何数据
+    geometry_data_id = Column(Integer, ForeignKey("geometry_data.id"), nullable=True)
+    
+    # 关联关系
+    stp_file = relationship("STPFile", back_populates="feature_detections")
+    
+    def __repr__(self):
+        return f"<FeatureDetection(id={self.id}, feature_type='{self.feature_type}', confidence={self.confidence})>"
+
+
+class DesignRecommendation(Base):
+    """设计建议表"""
+    __tablename__ = "design_recommendations"
+    
+    id = Column(Integer, primary_key=True, index=True)
+    stp_file_id = Column(Integer, ForeignKey("stp_files.id"), nullable=False, index=True)
+    
+    # 建议信息
+    rec_type = Column(String(50), nullable=False)  # wall_thickness, draft_angle, etc.
+    priority = Column(String(20), nullable=False)  # high, medium, low
+    description = Column(String(500), nullable=False)
+    reason = Column(Text, nullable=True)
+    
+    # 建议参数
+    parameters = Column(JSON, nullable=True)
+    
+    # 状态
+    status = Column(String(20), default="pending")  # pending, accepted, rejected
+    user_notes = Column(Text, nullable=True)
+    
+    # 时间戳
+    created_at = Column(DateTime, default=func.now())
+    updated_at = Column(DateTime, nullable=True)
+    
+    # 关联关系
+    stp_file = relationship("STPFile", back_populates="design_recommendations")
+    
+    def __repr__(self):
+        return f"<DesignRecommendation(id={self.id}, rec_type='{self.rec_type}', priority='{self.priority}')>"
+
+
+class UserActivity(Base):
+    """用户活动日志表"""
+    __tablename__ = "user_activities"
+    
+    id = Column(Integer, primary_key=True, index=True)
+    user_id = Column(Integer, ForeignKey("users.id"), nullable=False, index=True)
+    
+    # 活动信息
+    activity_type = Column(String(50), nullable=False, index=True)  # upload, view, download, delete, export
+    resource_type = Column(String(50), nullable=True)  # stp_file, geometry_data, mold_cavity
+    resource_id = Column(Integer, nullable=True)
+    
+    # 活动详情
+    description = Column(Text, nullable=True)
+    meta_data = Column(JSON, nullable=True)
+    
+    # 时间戳
+    created_at = Column(DateTime, default=func.now(), index=True)
+    
+    # IP和设备信息
+    ip_address = Column(String(45), nullable=True)
+    user_agent = Column(String(500), nullable=True)
+    
+    def __repr__(self):
+        return f"<UserActivity(id={self.id}, user_id={self.user_id}, activity_type='{self.activity_type}')>"
+
+
+class SystemLog(Base):
+    """系统日志表（重要操作和错误）"""
+    __tablename__ = "system_logs"
+    
+    id = Column(Integer, primary_key=True, index=True)
+    
+    # 日志级别
+    level = Column(String(20), nullable=False, index=True)  # INFO, WARNING, ERROR, CRITICAL
+    
+    # 日志信息
+    message = Column(Text, nullable=False)
+    module = Column(String(100), nullable=True)  # 模块名
+    function_name = Column(String(100), nullable=True)
+    
+    # 时间戳
+    created_at = Column(DateTime, default=func.now(), index=True)
+    
+    # 用户信息（如果有关联用户）
+    user_id = Column(Integer, ForeignKey("users.id"), nullable=True)
+    
+    # 额外信息
+    request_id = Column(String(100), nullable=True)  # 关联的请求ID
+    execution_time_ms = Column(Integer, nullable=True)  # 执行时间
+    
+    # 关联数据
+    resource_type = Column(String(50), nullable=True)
+    resource_id = Column(Integer, nullable=True)
+    
+    def __repr__(self):
+        return f"<SystemLog(id={self.id}, level='{self.level}', module='{self.module}')>"
+
+
+class Product(Base):
+    """产品表"""
+    __tablename__ = "products"
+    
+    id = Column(Integer, primary_key=True, index=True)
+    sku = Column(String(50), unique=True, index=True, nullable=False)
+    name = Column(String(200), nullable=False)
+    description = Column(Text, nullable=True)
+    category = Column(String(100), nullable=True)
+    unit = Column(String(20), default="件")
+    item_type = Column(String(20), default="finished", index=True)
+    cost_price = Column(Numeric(12, 2), default=0)
+    sale_price = Column(Numeric(12, 2), default=0)
+    min_stock = Column(Integer, default=0)
+    max_stock = Column(Integer, default=1000)
+    is_active = Column(Boolean, default=True)
+    created_at = Column(DateTime, default=func.now())
+    updated_at = Column(DateTime, default=func.now(), onupdate=func.now())
+    
+    inventory = relationship("Inventory", back_populates="product", uselist=False)
+    stock_movements = relationship("StockMovement", back_populates="product")
+    bom_materials = relationship(
+        "ProductMaterial",
+        foreign_keys="ProductMaterial.finished_product_id",
+        back_populates="finished_product",
+        cascade="all, delete-orphan"
+    )
+    used_in_products = relationship(
+        "ProductMaterial",
+        foreign_keys="ProductMaterial.material_product_id",
+        back_populates="material_product"
+    )
+    
+    def __repr__(self):
+        return f"<Product(id={self.id}, sku='{self.sku}', name='{self.name}')>"
+
+
+class ProductMaterial(Base):
+    __tablename__ = "product_materials"
+    __table_args__ = (
+        UniqueConstraint("finished_product_id", "material_product_id", name="uq_product_material_unique"),
+    )
+
+    id = Column(Integer, primary_key=True, index=True)
+    finished_product_id = Column(Integer, ForeignKey("products.id"), nullable=False, index=True)
+    material_product_id = Column(Integer, ForeignKey("products.id"), nullable=False, index=True)
+    quantity = Column(Numeric(12, 4), nullable=False)
+    loss_rate = Column(Numeric(5, 4), default=0)
+    created_at = Column(DateTime, default=func.now())
+    updated_at = Column(DateTime, default=func.now(), onupdate=func.now())
+
+    finished_product = relationship(
+        "Product",
+        foreign_keys=[finished_product_id],
+        back_populates="bom_materials"
+    )
+    material_product = relationship(
+        "Product",
+        foreign_keys=[material_product_id],
+        back_populates="used_in_products"
+    )
+
+    def __repr__(self):
+        return f"<ProductMaterial(finished_product_id={self.finished_product_id}, material_product_id={self.material_product_id})>"
+
+
+class MaterialPriceHistory(Base):
+    """物料价格历史表"""
+    __tablename__ = "material_price_history"
+    
+    id = Column(Integer, primary_key=True, index=True)
+    product_id = Column(Integer, ForeignKey("products.id"), nullable=False, index=True)
+    price = Column(Numeric(12, 2), nullable=False)
+    effective_date = Column(DateTime, default=func.now(), index=True)
+    supplier_id = Column(Integer, ForeignKey("suppliers.id"), nullable=True, index=True)
+    remark = Column(Text, nullable=True)
+    created_at = Column(DateTime, default=func.now())
+    
+    product = relationship("Product", backref="price_history")
+    supplier = relationship("Supplier", backref="price_history")
+    
+    def __repr__(self):
+        return f"<MaterialPriceHistory(product_id={self.product_id}, price={self.price}, date={self.effective_date})>"
+
+
+class MaterialSupplier(Base):
+    """物料供应商关联表"""
+    __tablename__ = "material_suppliers"
+    
+    id = Column(Integer, primary_key=True, index=True)
+    product_id = Column(Integer, ForeignKey("products.id"), nullable=False, index=True)
+    supplier_id = Column(Integer, ForeignKey("suppliers.id"), nullable=False, index=True)
+    is_primary = Column(Boolean, default=False)
+    contact_person = Column(String(100), nullable=True)
+    contact_phone = Column(String(50), nullable=True)
+    lead_time = Column(Integer, nullable=True)  # 交货周期（天）
+    min_order_quantity = Column(Integer, nullable=True)
+    created_at = Column(DateTime, default=func.now())
+    updated_at = Column(DateTime, default=func.now(), onupdate=func.now())
+    
+    product = relationship("Product", backref="suppliers")
+    supplier = relationship("Supplier", backref="materials")
+    
+    def __repr__(self):
+        return f"<MaterialSupplier(product_id={self.product_id}, supplier_id={self.supplier_id}, primary={self.is_primary})>"
+
+
+class Supplier(Base):
+    """供应商表"""
+    __tablename__ = "suppliers"
+    
+    id = Column(Integer, primary_key=True, index=True)
+    code = Column(String(50), unique=True, index=True)
+    name = Column(String(200), nullable=False)
+    contact_person = Column(String(100), nullable=True)
+    phone = Column(String(50), nullable=True)
+    email = Column(String(100), nullable=True)
+    address = Column(Text, nullable=True)
+    bank_name = Column(String(100), nullable=True)
+    bank_account = Column(String(50), nullable=True)
+    tax_number = Column(String(50), nullable=True)
+    is_active = Column(Boolean, default=True)
+    created_at = Column(DateTime, default=func.now())
+    updated_at = Column(DateTime, default=func.now(), onupdate=func.now())
+    
+    purchase_orders = relationship("PurchaseOrder", back_populates="supplier")
+    
+    def __repr__(self):
+        return f"<Supplier(id={self.id}, name='{self.name}')>"
+
+
+class Customer(Base):
+    """客户表"""
+    __tablename__ = "customers"
+    
+    id = Column(Integer, primary_key=True, index=True)
+    code = Column(String(50), unique=True, index=True)
+    name = Column(String(200), nullable=False)
+    contact_person = Column(String(100), nullable=True)
+    phone = Column(String(50), nullable=True)
+    email = Column(String(100), nullable=True)
+    address = Column(Text, nullable=True)
+    bank_name = Column(String(100), nullable=True)
+    bank_account = Column(String(50), nullable=True)
+    tax_number = Column(String(50), nullable=True)
+    credit_limit = Column(Numeric(12, 2), default=0)
+    is_active = Column(Boolean, default=True)
+    created_at = Column(DateTime, default=func.now())
+    updated_at = Column(DateTime, default=func.now(), onupdate=func.now())
+    
+    sales_orders = relationship("SalesOrder", back_populates="customer")
+    
+    def __repr__(self):
+        return f"<Customer(id={self.id}, name='{self.name}')>"
+
+
+class Warehouse(Base):
+    """仓库表"""
+    __tablename__ = "warehouses"
+    
+    id = Column(Integer, primary_key=True, index=True)
+    code = Column(String(50), unique=True, index=True)
+    name = Column(String(200), nullable=False)
+    address = Column(Text, nullable=True)
+    manager = Column(String(100), nullable=True)
+    phone = Column(String(50), nullable=True)
+    is_active = Column(Boolean, default=True)
+    is_default = Column(Boolean, default=False)
+    created_at = Column(DateTime, default=func.now())
+    
+    inventories = relationship("Inventory", back_populates="warehouse")
+    
+    def __repr__(self):
+        return f"<Warehouse(id={self.id}, name='{self.name}')>"
+
+
+class Inventory(Base):
+    """库存表"""
+    __tablename__ = "inventory"
+    
+    id = Column(Integer, primary_key=True, index=True)
+    product_id = Column(Integer, ForeignKey("products.id"), nullable=False, index=True)
+    warehouse_id = Column(Integer, ForeignKey("warehouses.id"), nullable=False, index=True)
+    quantity = Column(Numeric(12, 4), default=0)
+    locked_quantity = Column(Numeric(12, 4), default=0)
+    batch_number = Column(String(50), nullable=True)
+    location = Column(String(100), nullable=True)
+    updated_at = Column(DateTime, default=func.now(), onupdate=func.now())
+    
+    product = relationship("Product", back_populates="inventory")
+    warehouse = relationship("Warehouse", back_populates="inventories")
+    
+    def __repr__(self):
+        return f"<Inventory(product_id={self.product_id}, quantity={self.quantity})>"
+    
+    @property
+    def available_quantity(self):
+        return self.quantity - self.locked_quantity
+
+
+class StockMovement(Base):
+    """库存变动记录表"""
+    __tablename__ = "stock_movements"
+    
+    id = Column(Integer, primary_key=True, index=True)
+    product_id = Column(Integer, ForeignKey("products.id"), nullable=False, index=True)
+    warehouse_id = Column(Integer, ForeignKey("warehouses.id"), nullable=False)
+    movement_type = Column(String(20), nullable=False)
+    quantity = Column(Numeric(12, 4), nullable=False)
+    before_quantity = Column(Numeric(12, 4), default=0)
+    after_quantity = Column(Numeric(12, 4), default=0)
+    reference_type = Column(String(50), nullable=True)
+    reference_id = Column(Integer, nullable=True)
+    reference_no = Column(String(50), nullable=True)
+    unit_price = Column(Numeric(12, 2), nullable=True)
+    total_amount = Column(Numeric(12, 2), nullable=True)
+    remark = Column(Text, nullable=True)
+    operator_id = Column(Integer, ForeignKey("users.id"), nullable=True)
+    created_at = Column(DateTime, default=func.now(), index=True)
+    
+    product = relationship("Product", back_populates="stock_movements")
+    
+    def __repr__(self):
+        return f"<StockMovement(id={self.id}, type='{self.movement_type}', qty={self.quantity})>"
+
+
+class PurchaseOrder(Base):
+    """采购订单表"""
+    __tablename__ = "purchase_orders"
+    
+    id = Column(Integer, primary_key=True, index=True)
+    order_no = Column(String(50), unique=True, index=True, nullable=False)
+    supplier_id = Column(Integer, ForeignKey("suppliers.id"), nullable=False, index=True)
+    order_date = Column(DateTime, default=func.now())
+    expected_date = Column(Date, nullable=True)
+    status = Column(String(20), default="draft")
+    total_amount = Column(Numeric(12, 2), default=0)
+    paid_amount = Column(Numeric(12, 2), default=0)
+    remark = Column(Text, nullable=True)
+    operator_id = Column(Integer, ForeignKey("users.id"), nullable=True)
+    created_at = Column(DateTime, default=func.now())
+    updated_at = Column(DateTime, default=func.now(), onupdate=func.now())
+    # 状态变更时间
+    received_date = Column(DateTime, nullable=True)  # 已收货时间
+    paid_date = Column(DateTime, nullable=True)  # 已付款时间
+    
+    supplier = relationship("Supplier", back_populates="purchase_orders")
+    items = relationship("PurchaseOrderItem", back_populates="order", cascade="all, delete-orphan")
+    
+    def __repr__(self):
+        return f"<PurchaseOrder(order_no='{self.order_no}', status='{self.status}')>"
+
+
+class PurchaseOrderItem(Base):
+    """采购订单明细表"""
+    __tablename__ = "purchase_order_items"
+    
+    id = Column(Integer, primary_key=True, index=True)
+    order_id = Column(Integer, ForeignKey("purchase_orders.id"), nullable=False)
+    product_id = Column(Integer, ForeignKey("products.id"), nullable=False)
+    quantity = Column(Integer, nullable=False)
+    received_quantity = Column(Integer, default=0)
+    unit_price = Column(Numeric(12, 2), nullable=False)
+    amount = Column(Numeric(12, 2), nullable=False)
+    remark = Column(Text, nullable=True)
+    
+    order = relationship("PurchaseOrder", back_populates="items")
+    
+    def __repr__(self):
+        return f"<PurchaseOrderItem(order_id={self.order_id}, product_id={self.product_id})>"
+
+
+class SalesOrder(Base):
+    """销售订单表"""
+    __tablename__ = "sales_orders"
+    
+    id = Column(Integer, primary_key=True, index=True)
+    order_no = Column(String(50), unique=True, index=True, nullable=False)
+    customer_id = Column(Integer, ForeignKey("customers.id"), nullable=False, index=True)
+    order_date = Column(DateTime, default=func.now())
+    delivery_date = Column(Date, nullable=True)
+    manufacturing_date = Column(DateTime, nullable=True)
+    actual_delivery_date = Column(DateTime, nullable=True)
+    actual_payment_date = Column(DateTime, nullable=True)
+    status = Column(String(20), default="draft")
+    production_status = Column(String(20), default="not_started", index=True)
+    production_no = Column(String(50), nullable=True, index=True)
+    planned_material_cost = Column(Numeric(12, 2), default=0)
+    actual_material_cost = Column(Numeric(12, 2), default=0)
+    total_amount = Column(Numeric(12, 2), default=0)
+    received_amount = Column(Numeric(12, 2), default=0)
+    remark = Column(Text, nullable=True)
+    operator_id = Column(Integer, ForeignKey("users.id"), nullable=True)
+    created_at = Column(DateTime, default=func.now())
+    updated_at = Column(DateTime, default=func.now(), onupdate=func.now())
+    
+    customer = relationship("Customer", back_populates="sales_orders")
+    items = relationship("SalesOrderItem", back_populates="order", cascade="all, delete-orphan")
+    
+    def __repr__(self):
+        return f"<SalesOrder(order_no='{self.order_no}', status='{self.status}')>"
+
+
+class FinanceTransaction(Base):
+    __tablename__ = "finance_transactions"
+
+    id = Column(Integer, primary_key=True, index=True)
+    txn_no = Column(String(50), unique=True, index=True, nullable=False)
+    txn_type = Column(String(20), nullable=False, index=True)
+    partner_type = Column(String(20), nullable=False, index=True)
+    partner_id = Column(Integer, nullable=False, index=True)
+    amount = Column(Numeric(12, 2), nullable=False)
+    txn_date = Column(DateTime, default=func.now(), index=True)
+    method = Column(String(30), default="bank")
+    account_name = Column(String(100), nullable=True)
+    status = Column(String(20), default="confirmed", index=True)
+    remark = Column(Text, nullable=True)
+    operator_id = Column(Integer, ForeignKey("users.id"), nullable=True)
+    created_at = Column(DateTime, default=func.now(), index=True)
+
+    allocations = relationship("FinanceAllocation", back_populates="transaction", cascade="all, delete-orphan")
+
+    def __repr__(self):
+        return f"<FinanceTransaction(txn_no='{self.txn_no}', txn_type='{self.txn_type}', amount={self.amount})>"
+
+
+class FinanceAllocation(Base):
+    __tablename__ = "finance_allocations"
+
+    id = Column(Integer, primary_key=True, index=True)
+    transaction_id = Column(Integer, ForeignKey("finance_transactions.id"), nullable=False, index=True)
+    order_type = Column(String(20), nullable=False, index=True)
+    order_id = Column(Integer, nullable=False, index=True)
+    allocated_amount = Column(Numeric(12, 2), nullable=False)
+    created_at = Column(DateTime, default=func.now(), index=True)
+
+    transaction = relationship("FinanceTransaction", back_populates="allocations")
+
+    def __repr__(self):
+        return f"<FinanceAllocation(transaction_id={self.transaction_id}, order_type='{self.order_type}', amount={self.allocated_amount})>"
+
+
+class AnalysisMetrics(Base):
+    """分析指标表"""
+    __tablename__ = "analysis_metrics"
+    
+    id = Column(Integer, primary_key=True, index=True)
+    stp_file_id = Column(Integer, ForeignKey("stp_files.id"), nullable=False, index=True)
+    
+    # 质量指标
+    volume_utilization = Column(Float, default=0)  # 体积利用率
+    topology_complexity = Column(Float, default=0)  # 拓扑复杂度
+    wall_uniformity = Column(Float, default=0)      # 壁厚均匀性
+    
+    # 分析摘要
+    analysis_summary = Column(Text, nullable=True)
+    
+    # FreeCAD 验证结果
+    verification_status = Column(String(20), nullable=True)  # passed, failed, pending, error
+    verification_volume_diff = Column(Float, nullable=True)  # 体积差异百分比
+    verification_area_diff = Column(Float, nullable=True)    # 表面积差异百分比
+    verification_details = Column(JSON, nullable=True)       # 完整验证结果
+    
+    # 时间戳
+    created_at = Column(DateTime, default=func.now())
+    
+    # 关联关系
+    stp_file = relationship("STPFile", back_populates="analysis_metrics")
+    
+    def __repr__(self):
+        return f"<AnalysisMetrics(stp_file_id={self.stp_file_id}, volume_utilization={self.volume_utilization})>"
+
+
+class SalesOrderItem(Base):
+    """销售订单明细表"""
+    __tablename__ = "sales_order_items"
+    
+    id = Column(Integer, primary_key=True, index=True)
+    order_id = Column(Integer, ForeignKey("sales_orders.id"), nullable=False)
+    product_id = Column(Integer, ForeignKey("products.id"), nullable=False)
+    quantity = Column(Integer, nullable=False)
+    delivered_quantity = Column(Integer, default=0)
+    unit_price = Column(Numeric(12, 2), nullable=False)
+    amount = Column(Numeric(12, 2), nullable=False)
+    remark = Column(Text, nullable=True)
+    
+    order = relationship("SalesOrder", back_populates="items")
+    
+    def __repr__(self):
+        return f"<SalesOrderItem(order_id={self.order_id}, product_id={self.product_id})>"
+
diff --git a/src/services/processing_service.py b/src/services/processing_service.py
new file mode 100644
index 0000000..7c0927b
--- /dev/null
+++ b/src/services/processing_service.py
@@ -0,0 +1,527 @@
+# services/processing_service.py
+"""STP 文件处理流程编排器 — 协调解析、网格生成、型腔生成、保存、验证"""
+
+import asyncio
+import traceback
+from datetime import datetime
+from pathlib import Path
+from typing import Optional, Dict, Any
+
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from core.stp_parser import STPParser
+from core.geometry_analyzer import GeometryAnalyzer
+from core.mold_generator import MoldCavityGenerator
+from core.aluminum_foam_mold import AluminumFoamMoldGenerator
+from core.mold_quality_inspector import AluminumFoamMoldQualityInspector
+from core.mesh_generator import MeshGenerator
+from core.multi_scheme_planner import MultiSchemeMoldPlanner
+from services.storage_integration_rustfs import StorageIntegrationService
+from services.redis_task_manager import redis_task_manager
+from services.material_service import MaterialService
+from services.calculation_service import CalculationService
+from services.llm_service import llm_service
+from models.schemas import ProcessingStatus
+from database.database import db_manager
+from utils.html_generator import HTMLGenerator
+from utils.logger import get_logger
+
+logger = get_logger(__name__)
+
+
+class ProcessingService:
+    """核心处理流程编排 — 协调 STP 解析、网格、型腔、计算、保存、验证"""
+
+    def __init__(self):
+        self.stp_parser = STPParser()
+        self.geometry_analyzer = GeometryAnalyzer()
+        self.mold_generator = MoldCavityGenerator(shrinkage_rate=0.005)
+        self.aluminum_foam_generator = AluminumFoamMoldGenerator(shrinkage_rate=0.015, draft_angle=3.0)
+        self.mold_quality_inspector = AluminumFoamMoldQualityInspector()
+        self.mesh_generator = MeshGenerator(quality="medium")
+        self.html_generator = HTMLGenerator()
+        self.storage_service = StorageIntegrationService()
+        self.multi_scheme_planner = MultiSchemeMoldPlanner()
+
+    # ─── 对外入口 ───
+
+    async def process_file_with_storage(
+        self,
+        task_id: str,
+        file_path: str,
+        stp_file_id: int,
+        material: str = "ABS",
+    ):
+        """处理文件的后台任务 — 使用独立数据库会话"""
+
+        # 创建独立的数据库会话，避免请求范围会话关闭
+        async with db_manager.session() as db_session:
+            try:
+                logger.info(f"开始处理文件并生成模具型腔: {file_path}")
+
+                # 设置处理超时（5分钟）
+                timeout_seconds = 300
+
+                try:
+                    await asyncio.wait_for(
+                        self.process_file_core(
+                            task_id, file_path, stp_file_id, db_session, material
+                        ),
+                        timeout_seconds,
+                    )
+                except asyncio.TimeoutError:
+                    logger.error(f"处理超时: {task_id}")
+                    raise Exception(f"处理超时，超过{timeout_seconds}秒未完成")
+
+            except Exception as e:
+                logger.error(f"模具型腔生成失败: {e}")
+
+                await self.storage_service.update_stp_file_status(db_session, stp_file_id, "failed")
+                await self.storage_service.update_task_status(
+                    db_session, task_id, "failed", error_message=str(e)
+                )
+
+                # 安全更新 Redis 任务状态
+                task = await redis_task_manager.get_task(task_id)
+                if task:
+                    await redis_task_manager.update_task(task_id, {
+                        "status": ProcessingStatus.FAILED,
+                        "error": str(e),
+                        "completed_at": str(datetime.now()),
+                    })
+
+    async def process_file_core(
+        self,
+        task_id: str,
+        file_path: str,
+        stp_file_id: int,
+        db_session: AsyncSession,
+        material: str = "ABS",
+    ):
+        """核心处理逻辑"""
+
+        try:
+            logger.info(f"开始处理文件并生成模具型腔: {file_path}")
+
+            # 1. 解析STP文件
+            await self.storage_service.update_task_status(
+                db_session, task_id, "processing", 20, "解析STP文件"
+            )
+
+            shape = self.stp_parser.load_step_file(Path(file_path))
+            geometry_data = self.stp_parser.analyze_geometry(shape)
+
+            # 2. 生成网格数据并持久化
+            await self.storage_service.update_task_status(
+                db_session, task_id, "processing", 30, "生成网格数据"
+            )
+
+            mesh_result = await self._step_generate_mesh(
+                shape, geometry_data, file_path, db_session, stp_file_id, task_id
+            )
+
+            # 3. 生成模具型腔
+            await self.storage_service.update_task_status(
+                db_session, task_id, "processing", 40, "生成模具型腔"
+            )
+
+            # 材料属性 — 通过 MaterialService 集中管理
+            requested_material = MaterialService.resolve_material(material)
+            selected_material = MaterialService.get_material(requested_material)
+            is_foam_material = MaterialService.is_foam_material(requested_material)
+
+            plan_result = await self._step_generate_cavity(
+                shape, selected_material, is_foam_material
+            )
+
+            # 4. 生成详细JSON数据 — 委托 CalculationService
+            await self.storage_service.update_task_status(
+                db_session, task_id, "processing", 60, "生成型腔详细数据"
+            )
+
+            detailed_cavity_json = CalculationService.build_plan_result(
+                geometry_data=geometry_data,
+                material=selected_material,
+                file_path=str(file_path),
+                plan_result=plan_result,
+            )
+
+            best_scheme = CalculationService.get_best_scheme(detailed_cavity_json)
+            best_cavity_data = best_scheme.get("cavity_data", {}) if best_scheme else {}
+            best_key_info = best_scheme.get("key_info", {}) if best_scheme else {}
+
+            if best_cavity_data.get("mold_cavities"):
+                cavity_geometry = best_cavity_data["mold_cavities"].get("cavity", {})
+                logger.info(
+                    f"推荐方案型腔数据已合并: cavity {cavity_geometry.get('vertex_count', 0)} 顶点"
+                )
+
+            # 5. 生成关键信息
+            cavity_key_info = best_key_info
+
+            # 6. 保存几何数据到数据库
+            await self.storage_service.update_task_status(
+                db_session, task_id, "processing", 70, "保存几何数据"
+            )
+
+            await self.storage_service.save_geometry_data(
+                db_session,
+                stp_file_id,
+                geometry_data,
+                geometry_data.get("analysis_method", "mold_cavity"),
+            )
+
+            # 7. 生成HTML可视化
+            await self.storage_service.update_task_status(
+                db_session, task_id, "processing", 85, "生成可视化报告"
+            )
+
+            pointcloud_data = None
+            lod_data = None
+            if mesh_result:
+                pointcloud_data = {
+                    "points": mesh_result.get("points", []),
+                    "normals": mesh_result.get("normals", []),
+                    "vertices": mesh_result.get("vertices", []),
+                    "faces": mesh_result.get("faces", []),
+                    "point_count": mesh_result.get("point_count", 0),
+                    "vertex_count": mesh_result.get("vertex_count", 0),
+                    "face_count": mesh_result.get("face_count", 0),
+                }
+
+            # 生成多级LOD数据（用于前端按距离切换精度）
+            try:
+                lod_result = self.mesh_generator.generate_multi_lod_mesh(shape)
+                if lod_result and lod_result.get("lods"):
+                    lod_data = lod_result
+                    logger.info(f"LOD数据生成成功: {len(lod_result['lods'])} 级 (面数: {[lod_result['lods'][k]['face_count'] for k in sorted(lod_result['lods'].keys())]})")
+            except Exception as lod_err:
+                logger.warning(f"LOD数据生成失败，使用单级精度: {lod_err}")
+
+            detailed_cavity_json = await self._attach_scheme_previews(
+                detailed_cavity_json=detailed_cavity_json,
+                geometry_data=geometry_data,
+                stp_filename=Path(file_path).name,
+                pointcloud_data=pointcloud_data,
+                lod_data=lod_data,
+            )
+
+            best_scheme = CalculationService.get_best_scheme(detailed_cavity_json)
+            best_cavity_data = best_scheme.get("cavity_data", {}) if best_scheme else best_cavity_data
+            best_key_info = best_scheme.get("key_info", {}) if best_scheme else best_key_info
+
+            # 8. 保存模具型腔数据（包含方案级预览链接）
+            await self.storage_service.save_mold_cavity_data(
+                db_session, stp_file_id, detailed_cavity_json
+            )
+
+            html_file_path = self.html_generator.generate_and_save_visualization(
+                geometry_data,
+                Path(file_path).name,
+                cavity_data=best_cavity_data,
+                pointcloud_data=pointcloud_data,
+                lod_data=lod_data,
+            )
+
+            await self.storage_service.save_html_file(
+                db_session,
+                stp_file_id,
+                Path(html_file_path).name,
+                html_file_path,
+            )
+
+            # 9. 分析模具设计
+            analysis_result = self.geometry_analyzer.analyze_mold_design(geometry_data)
+
+            if analysis_result:
+                await self.storage_service.save_features_and_recommendations(
+                    db_session,
+                    stp_file_id,
+                    analysis_result.get("detected_features", []),
+                    analysis_result.get("design_recommendations", []),
+                )
+
+                await self._save_analysis_metrics(db_session, stp_file_id, analysis_result)
+
+            # 9.6 更新STP文件的分析摘要字段
+            await self.storage_service.update_stp_file_analysis_summary(
+                db_session,
+                stp_file_id,
+                volume=geometry_data.get("volume", 0),
+                surface_area=geometry_data.get("surface_area", 0),
+                product_weight=CalculationService.calculate_product_weight(
+                    geometry_data.get("volume", 0), selected_material["density"]
+                ),
+            )
+
+            # 9.7 FreeCAD 几何验证
+            verification_result = await self._step_verify(
+                file_path, db_session, task_id, stp_file_id, analysis_result
+            )
+
+            # 9.8 LLM 增强分析（可选，不影响主流程）
+            llm_report = None
+            llm_parting = None
+            if analysis_result:
+                llm_report = await llm_service.generate_design_report(
+                    analysis_result, detailed_cavity_json
+                )
+                candidate_schemes = detailed_cavity_json.get("candidate_schemes", [])
+                if candidate_schemes:
+                    cavity_count = detailed_cavity_json.get("mold_cavities", {}).get("cavity_count", 1)
+                    if isinstance(cavity_count, (int, float)):
+                        cavity_count = int(cavity_count)
+                    else:
+                        cavity_count = 1
+                    llm_parting = await llm_service.recommend_parting_direction(
+                        geometry_data, candidate_schemes, selected_material,
+                        cavity_count=cavity_count,
+                    )
+
+            # 10. 完成处理
+            await self.storage_service.update_stp_file_status(db_session, stp_file_id, "completed")
+            await self.storage_service.update_task_status(
+                db_session, task_id, "completed", 100, "模具型腔生成完成"
+            )
+
+            # 更新任务缓存状态
+            await redis_task_manager.update_task(task_id, {
+                "geometry_data": geometry_data,
+                "analysis_result": analysis_result,
+                "plan_result": detailed_cavity_json,
+                "candidate_schemes": detailed_cavity_json.get("candidate_schemes", []),
+                "best_scheme_id": detailed_cavity_json.get("best_scheme_id"),
+                "cavity_data": best_cavity_data,
+                "key_info": best_key_info,
+                "html_file": best_scheme.get("html_file", f"/html/{Path(html_file_path).name}") if best_scheme else f"/html/{Path(html_file_path).name}",
+                "verification": verification_result,
+                "llm_report": llm_report,
+                "llm_parting_recommendation": llm_parting,
+                "status": ProcessingStatus.COMPLETED,
+                "completed_at": str(datetime.now()),
+            })
+
+            logger.info(f"模具型腔生成完成: {task_id}")
+            logger.info(f"key_info metadata: {detailed_cavity_json.get('metadata', {})}")
+            logger.info(f"key_info manufacturing_info: {detailed_cavity_json.get('manufacturing_info', {})}")
+            logger.info(f"key_info geometric_characteristics: {detailed_cavity_json.get('mold_cavities', {}).get('cavity_key_info', {}).get('geometric_characteristics', {})}")
+
+        except Exception as e:
+            logger.error(f"模具型腔生成失败: {e}")
+
+            await self.storage_service.update_stp_file_status(db_session, stp_file_id, "failed")
+            await self.storage_service.update_task_status(
+                db_session, task_id, "failed", error_message=str(e)
+            )
+
+            task = await redis_task_manager.get_task(task_id)
+            if task:
+                await redis_task_manager.update_task(task_id, {
+                    "status": ProcessingStatus.FAILED,
+                    "error": str(e),
+                    "completed_at": str(datetime.now()),
+                })
+
+    # ─── 内部步骤 ───
+
+    async def _step_generate_mesh(
+        self, shape, geometry_data: dict, file_path: str,
+        db_session: AsyncSession, stp_file_id: int, task_id: str,
+    ) -> Optional[Dict[str, Any]]:
+        """生成网格数据并持久化，失败不影响主流程"""
+        mesh_result = None
+        try:
+            mesh_result = self.mesh_generator.generate_mesh_from_shape(shape)
+
+            vertices = mesh_result.get("vertices", [])
+            faces = mesh_result.get("faces", [])
+            points = mesh_result.get("points", [])
+            normals = mesh_result.get("normals", [])
+            point_count = mesh_result.get("point_count", 0)
+            vertex_count = mesh_result.get("vertex_count", 0)
+            face_count = mesh_result.get("face_count", 0)
+
+            if vertices and faces:
+                bbox = geometry_data.get("bounding_box", {})
+
+                mesh_json = {
+                    "metadata": {
+                        "file_name": Path(file_path).name,
+                        "generated_at": datetime.now().isoformat(),
+                        "quality": "medium",
+                        "vertex_count": vertex_count,
+                        "face_count": face_count,
+                        "point_count": point_count,
+                    },
+                    "mesh": {
+                        "vertices": vertices,
+                        "faces": faces,
+                    },
+                    "pointcloud": {
+                        "points": points,
+                        "normals": normals,
+                        "count": point_count,
+                    },
+                    "bounding_box": bbox,
+                }
+
+                await self.storage_service.save_mesh_data(
+                    db_session,
+                    stp_file_id=stp_file_id,
+                    mesh_json=mesh_json,
+                    quality="medium",
+                )
+                await redis_task_manager.update_task(task_id, {
+                    "mesh_summary": {
+                        "vertex_count": vertex_count,
+                        "face_count": face_count,
+                        "point_count": point_count,
+                        "quality": "medium",
+                    }
+                })
+        except Exception as mesh_err:
+            logger.warning(f"网格生成或保存失败，不影响主流程: {mesh_err}")
+
+        return mesh_result
+
+    async def _step_generate_cavity(
+        self, shape, selected_material: dict, is_foam_material: bool,
+    ) -> Optional[Dict[str, Any]]:
+        """生成多方案分模结果"""
+        plan_result = None
+        try:
+            if shape:
+                plan_result = self.multi_scheme_planner.generate_plan(
+                    shape=shape,
+                    material=selected_material,
+                    is_foam_material=is_foam_material,
+                )
+                logger.info(
+                    f"多方案分模完成: 生成 {len(plan_result.get('candidate_schemes', []))} 套方案"
+                )
+        except Exception as cavity_err:
+            logger.warning(f"多方案分模失败，使用简化数据: {cavity_err}")
+            traceback.print_exc()
+            plan_result = None
+
+        return plan_result
+
+    async def _step_verify(
+        self, file_path: str, db_session: AsyncSession,
+        task_id: str, stp_file_id: int, analysis_result: Optional[dict],
+    ) -> Optional[Dict[str, Any]]:
+        """FreeCAD 几何验证（可通过配置禁用）"""
+        from config.settings import settings
+
+        if not settings.ENABLE_FREECAD_VERIFICATION:
+            logger.info("FreeCAD验证已禁用（设置 ENABLE_FREECAD_VERIFICATION=true 启用）")
+            return {"status": "disabled", "reason": "FreeCAD验证已禁用"}
+
+        await self.storage_service.update_task_status(
+            db_session, task_id, "processing", 90, "FreeCAD几何验证"
+        )
+
+        try:
+            from services.verification_service import GeometryVerificationService
+            verification_svc = GeometryVerificationService(timeout=settings.FREECAD_VERIFICATION_TIMEOUT)
+            verification_result = await verification_svc.verify_stp_file(file_path)
+
+            if verification_result and analysis_result:
+                await self._save_verification_metrics(db_session, stp_file_id, verification_result)
+
+            logger.info(f"FreeCAD验证完成: {verification_result.get('status', 'unknown') if verification_result else 'failed'}")
+            return verification_result
+        except Exception as ve:
+            logger.warning(f"FreeCAD验证失败（不影响主流程）: {ve}")
+            return {"status": "error", "error": str(ve)}
+
+    async def _attach_scheme_previews(
+        self,
+        detailed_cavity_json: Dict[str, Any],
+        geometry_data: Dict[str, Any],
+        stp_filename: str,
+        pointcloud_data: Optional[Dict[str, Any]] = None,
+        lod_data: Optional[Dict[str, Any]] = None,
+    ) -> Dict[str, Any]:
+        """为每个候选分模方案生成独立HTML预览链接。"""
+        candidate_schemes = detailed_cavity_json.get("candidate_schemes", [])
+        if not candidate_schemes:
+            return detailed_cavity_json
+
+        for scheme in candidate_schemes:
+            cavity_data = scheme.get("cavity_data")
+            if not cavity_data:
+                continue
+            suffix = scheme.get("scheme_id")
+            html_path = self.html_generator.generate_and_save_visualization(
+                geometry_data,
+                stp_filename,
+                cavity_data=cavity_data,
+                pointcloud_data=pointcloud_data,
+                suffix=suffix,
+                lod_data=lod_data,
+            )
+            scheme["html_file"] = f"/html/{Path(html_path).name}"
+
+        best_scheme = CalculationService.get_best_scheme(detailed_cavity_json)
+        if best_scheme:
+            detailed_cavity_json["html_file"] = best_scheme.get("html_file")
+
+        return detailed_cavity_json
+
+    # ─── 指标持久化 ───
+
+    async def _save_analysis_metrics(self, session: AsyncSession, stp_file_id: int, analysis_result: dict):
+        """保存分析指标到数据库"""
+        from models.database import AnalysisMetrics
+
+        quality_metrics = analysis_result.get("quality_metrics", {})
+        analysis_summary = analysis_result.get("analysis_summary", "")
+
+        metrics = AnalysisMetrics(
+            stp_file_id=stp_file_id,
+            volume_utilization=quality_metrics.get("volume_utilization", 0),
+            topology_complexity=quality_metrics.get("topology_complexity", 0),
+            wall_uniformity=quality_metrics.get("wall_uniformity", 0),
+            analysis_summary=analysis_summary,
+        )
+
+        session.add(metrics)
+        await session.commit()
+        logger.info(f"分析指标保存成功: {metrics.id}")
+
+    async def _save_verification_metrics(self, session: AsyncSession, stp_file_id: int, verification_result: dict):
+        """保存验证指标到数据库"""
+        from models.database import AnalysisMetrics
+        from sqlalchemy import select
+
+        result = await session.execute(
+            select(AnalysisMetrics).where(AnalysisMetrics.stp_file_id == stp_file_id)
+        )
+        metrics = result.scalar_one_or_none()
+
+        comparison = verification_result.get("comparison", {})
+        volume_comparison = comparison.get("volume", {})
+        area_comparison = comparison.get("surface_area", {})
+
+        if metrics:
+            metrics.verification_status = verification_result.get("status", "unknown")
+            metrics.verification_volume_diff = volume_comparison.get("difference_percent", 0)
+            metrics.verification_area_diff = area_comparison.get("difference_percent", 0)
+            metrics.verification_details = verification_result
+        else:
+            metrics = AnalysisMetrics(
+                stp_file_id=stp_file_id,
+                verification_status=verification_result.get("status", "unknown"),
+                verification_volume_diff=volume_comparison.get("difference_percent", 0),
+                verification_area_diff=area_comparison.get("difference_percent", 0),
+                verification_details=verification_result,
+            )
+            session.add(metrics)
+
+        await session.commit()
+        logger.info(f"验证指标保存成功: stp_file_id={stp_file_id}")
+
+
+# 模块级单例，供路由层直接使用
+processing_service = ProcessingService()