v0.2.0: CRM/ERP 系统升级 - 清理 .gitignore 并移除误提交的 venv/env/db 文件

- 更新 .gitignore：全面覆盖环境变量、数据库、日志、缓存、上传文件
- 移除误跟踪的 server/venv/、crm_data.db、.env 文件
- 新增 server/.env.example 模板
- 新增合同管理、利润核算、AI教练等功能模块
- 新增 Playwright e2e 测试套件
- 前后端多项功能升级和 bug 修复

server/app/models/finance.py

@@ -33,6 +33,9 @@ class FinInvoicePool(Base):
     uploader_id: Mapped[uuid.UUID | None] = mapped_column(
         UUID(as_uuid=True), ForeignKey("sys_users.id"), nullable=True
     )
+    company_id: Mapped[uuid.UUID] = mapped_column(
+        UUID(as_uuid=True), ForeignKey("sys_companies.id"), nullable=False, index=True
+    )
     file_url: Mapped[str | None] = mapped_column(String(500), nullable=True)
     merchant_name: Mapped[str | None] = mapped_column(String(200), nullable=True)
     amount: Mapped[float] = mapped_column(Numeric(14, 2), default=0)
@@ -59,6 +62,9 @@ class FinExpenseRecord(Base):
     applicant_id: Mapped[uuid.UUID] = mapped_column(
         UUID(as_uuid=True), ForeignKey("sys_users.id"), nullable=False
     )
+    company_id: Mapped[uuid.UUID] = mapped_column(
+        UUID(as_uuid=True), ForeignKey("sys_companies.id"), nullable=False, index=True
+    )
     total_amount: Mapped[float] = mapped_column(Numeric(14, 2), default=0)
     status: Mapped[str] = mapped_column(String(20), nullable=False, default="draft")
     remark: Mapped[str | None] = mapped_column(Text, nullable=True)
@@ -134,9 +140,23 @@ class FinSalesInvoice(Base):
     payment_date: Mapped[date | None] = mapped_column(Date, nullable=True)
     payment_amount: Mapped[float] = mapped_column(Numeric(14, 2), default=0)
     remark: Mapped[str | None] = mapped_column(Text, nullable=True)
+    order_id: Mapped[uuid.UUID | None] = mapped_column(
+        UUID(as_uuid=True), ForeignKey("erp_orders.id"), nullable=True,
+        comment="关联订单"
+    )
+    shipping_record_id: Mapped[uuid.UUID | None] = mapped_column(
+        UUID(as_uuid=True), ForeignKey("erp_shipping_records.id"), nullable=True,
+        comment="关联发货单"
+    )
+    payment_due_date: Mapped[date | None] = mapped_column(
+        Date, nullable=True, comment="回款截止日（根据合同付款条件自动推算）"
+    )
     created_by: Mapped[uuid.UUID | None] = mapped_column(
         UUID(as_uuid=True), ForeignKey("sys_users.id"), nullable=True
     )
+    company_id: Mapped[uuid.UUID] = mapped_column(
+        UUID(as_uuid=True), ForeignKey("sys_companies.id"), nullable=False, index=True
+    )
     created_at: Mapped[datetime] = mapped_column(DateTime, server_default=func.now())
     updated_at: Mapped[datetime] = mapped_column(
         DateTime, server_default=func.now(), onupdate=func.now()
@@ -150,3 +170,43 @@ class FinSalesInvoice(Base):
     creator: Mapped["SysUser | None"] = relationship(  # noqa: F821
         "SysUser", lazy="selectin"
     )
+
+
+class FinOcrTask(Base):
+    """OCR 处理任务队列 — 持久化排队"""
+    __tablename__ = "fin_ocr_tasks"
+
+    id: Mapped[uuid.UUID] = mapped_column(
+        UUID(as_uuid=True), primary_key=True, default=uuid.uuid4
+    )
+    file_url: Mapped[str] = mapped_column(String(500), nullable=False)
+    file_ext: Mapped[str] = mapped_column(String(10), nullable=False, comment=".pdf/.png/.jpg")
+    original_name: Mapped[str] = mapped_column(String(200), nullable=False, default="")
+    status: Mapped[str] = mapped_column(
+        String(20), nullable=False, default="pending",
+        comment="pending/processing/success/failed/manual",
+    )
+    priority: Mapped[int] = mapped_column(default=100, comment="值越小越优先")
+    ocr_result: Mapped[dict | None] = mapped_column(JSONB, nullable=True)
+    error_message: Mapped[str | None] = mapped_column(Text, nullable=True)
+    retry_count: Mapped[int] = mapped_column(default=0)
+    max_retries: Mapped[int] = mapped_column(default=3)
+    invoice_pool_id: Mapped[uuid.UUID | None] = mapped_column(
+        UUID(as_uuid=True), ForeignKey("fin_invoice_pool.id"), nullable=True,
+        comment="成功入池后关联的发票 ID",
+    )
+    uploader_id: Mapped[uuid.UUID | None] = mapped_column(
+        UUID(as_uuid=True), ForeignKey("sys_users.id"), nullable=True,
+    )
+    company_id: Mapped[uuid.UUID] = mapped_column(
+        UUID(as_uuid=True), ForeignKey("sys_companies.id"), nullable=False, index=True,
+    )
+    inv_type: Mapped[str] = mapped_column(String(30), nullable=False, default="expense")
+    scheduled_after: Mapped[datetime | None] = mapped_column(DateTime, nullable=True)
+    created_at: Mapped[datetime] = mapped_column(DateTime, server_default=func.now())
+    updated_at: Mapped[datetime] = mapped_column(
+        DateTime, server_default=func.now(), onupdate=func.now()
+    )
+    is_deleted: Mapped[bool] = mapped_column(Boolean, default=False)
+
+    uploader: Mapped["SysUser | None"] = relationship("SysUser", lazy="selectin")  # noqa: F821