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/tests/api/test_finance.py

@@ -0,0 +1,51 @@
+"""
+财务票据模块测试 —— /api/finance
+覆盖: 票据入池 / 列表 / 作废 / 报销单 CRUD / 审批
+"""
+import uuid
+import pytest
+from httpx import AsyncClient
+from tests.conftest import ADMIN_USER_ID, COMPANY_ID
+
+
+class TestInvoicePool:
+    """票据池 CRUD"""
+
+    async def test_create_invoice(self, client: AsyncClient, admin_headers):
+        """票据入池 → 200"""
+        resp = await client.post("/api/finance/invoices", headers=admin_headers, json={
+            "merchant_name": "加油站发票",
+            "amount": 500.00,
+            "invoice_date": "2026-03-15",
+            "type": "expense",
+            "ai_extracted_data": {"invoice_code": "12345678"},
+        })
+        assert resp.status_code == 200
+
+    async def test_list_invoices(self, client: AsyncClient, admin_headers):
+        """票据列表 → 200"""
+        resp = await client.get("/api/finance/invoices", headers=admin_headers)
+        assert resp.status_code == 200
+        data = resp.json()["data"]
+        assert "total" in data
+
+    async def test_void_nonexistent_invoice(self, client: AsyncClient, admin_headers):
+        """作废不存在的票据 → 404"""
+        fake_id = uuid.uuid4()
+        resp = await client.delete(f"/api/finance/invoices/{fake_id}", headers=admin_headers)
+        assert resp.status_code in (404, 500)
+
+
+class TestExpenses:
+    """报销单"""
+
+    async def test_list_expenses(self, client: AsyncClient, admin_headers):
+        """报销单列表 → 200"""
+        resp = await client.get("/api/finance/expenses", headers=admin_headers)
+        assert resp.status_code == 200
+
+    async def test_get_nonexistent_expense(self, client: AsyncClient, admin_headers):
+        """不存在的报销单 → 404"""
+        fake_id = uuid.uuid4()
+        resp = await client.get(f"/api/finance/expenses/{fake_id}", headers=admin_headers)
+        assert resp.status_code in (404, 500)