feat: 实现后端核心业务逻辑 (Auth鉴权、二维码服务、看板与产品端点)

backend/app/services/dashboard_service.py

@@ -0,0 +1,41 @@
+"""Dashboard 统计服务"""
+from sqlalchemy import select, func
+from sqlalchemy.ext.asyncio import AsyncSession
+from pydantic import BaseModel
+
+
+class DashboardStats(BaseModel):
+    products_total: int
+    products_pending: int
+    products_in_progress: int
+    products_completed: int
+    tasks_total: int
+    tasks_pending: int
+    tasks_in_progress: int
+    tasks_completed: int
+
+
+async def get_dashboard_stats(db: AsyncSession) -> DashboardStats:
+    from app.models.product import Product
+    from app.models.task import Task
+
+    p_total = await db.scalar(select(func.count(Product.id)))
+    p_pending = await db.scalar(select(func.count(Product.id)).where(Product.status == "pending"))
+    p_progress = await db.scalar(select(func.count(Product.id)).where(Product.status == "in_progress"))
+    p_done = await db.scalar(select(func.count(Product.id)).where(Product.status == "completed"))
+
+    t_total = await db.scalar(select(func.count(Task.id)))
+    t_pending = await db.scalar(select(func.count(Task.id)).where(Task.status == "pending"))
+    t_progress = await db.scalar(select(func.count(Task.id)).where(Task.status == "in_progress"))
+    t_done = await db.scalar(select(func.count(Task.id)).where(Task.status == "completed"))
+
+    return DashboardStats(
+        products_total=p_total or 0,
+        products_pending=p_pending or 0,
+        products_in_progress=p_progress or 0,
+        products_completed=p_done or 0,
+        tasks_total=t_total or 0,
+        tasks_pending=t_pending or 0,
+        tasks_in_progress=t_progress or 0,
+        tasks_completed=t_done or 0,
+    )