feat: 生产订单新增导出 Excel 与打印功能

- 订单列表页「导出 Excel」(/orders/export): 导出全部生产订单(订单号/BOM/接单量/工厂/状态/经手人/下单时间/备注)

- 订单详情页「导出 Excel」(/order/<id>/export): 导出派工单, 含「订单信息」+「领料明细」双 sheet

- 订单详情页「打印」按钮: window.print() + @media print 样式(隐藏导航/按钮, 输入框转纯文本, 隐藏提示), 输出干净派工单

app.py

@@ -1468,6 +1468,23 @@ def orders():
     return render_template("orders.html", data=data)
 
 
+@app.route("/orders/export")
+@login_required
+@role_required("admin", "manager")
+def orders_export():
+    """导出全部生产订单为 Excel。"""
+    os_ = db.session.scalars(db.select(ProdOrder).order_by(ProdOrder.order_no.desc())).all()
+    data = []
+    for o in os_:
+        bom = db.session.get(Bom, o.bom_id)
+        fac = db.session.get(Factory, o.factory_id) if o.factory_id else None
+        data.append({"o": o, "bom": bom, "factory": fac})
+    from excel_io import export_orders
+    path = os.path.join(EXE_DIR, f"生产订单_{date.today().isoformat()}.xlsx")
+    export_orders(path, data)
+    return send_file(path, as_attachment=True, download_name=os.path.basename(path))
+
+
 @app.route("/order/new", methods=["GET", "POST"])
 @login_required
 @role_required("admin", "manager")
@@ -1540,6 +1557,44 @@ def order_detail(oid):
                            posted_count=posted_count)
 
 
+@app.route("/order/<int:oid>/export")
+@login_required
+@role_required("admin", "manager")
+def order_export(oid):
+    """导出单个生产订单详情(派工单)为 Excel。"""
+    o = db.session.get(ProdOrder, oid)
+    if not o:
+        return redirect(url_for("orders"))
+    bom = db.session.get(Bom, o.bom_id)
+    items = db.session.scalars(db.select(BomItem).where(BomItem.bom_id == o.bom_id)).all()
+    sm = stock_map_as_of(o.factory_id, o.created_at)
+    fac = db.session.get(Factory, o.factory_id) if o.factory_id else None
+    allocs = db.session.scalars(
+        db.select(ProdOrderAlloc).where(ProdOrderAlloc.order_id == oid)).all()
+    alloc_map = {a.material_id: a for a in allocs}
+    reqs = []
+    for it in items:
+        m = db.session.get(Material, it.material_id)
+        need = it.qty_per_unit * o.qty
+        have = sm.get(m.id, 0)
+        a = alloc_map.get(m.id)
+        subs = [{"pn": s["sub"].part_number, "mf": s["sub"].manufacturer or "-",
+                 "stock": round(s["stock"], 3), "available": s["available"]}
+                for s in substitute_rows(m.id, o.factory_id, None)]
+        reqs.append({"m": m, "need": need, "have": have,
+                     "gap": have - need, "short": need > have, "subs": subs,
+                     "alloc": a.alloc_qty if a else 0,
+                     "posted": a.posted if a else False})
+    reqs.sort(key=lambda x: x["gap"])
+    posted_total = sum(a.alloc_qty for a in allocs if a.posted)
+    planned_total = sum(a.alloc_qty for a in allocs)
+    posted_count = sum(1 for a in allocs if a.posted)
+    from excel_io import export_order_detail
+    path = os.path.join(EXE_DIR, f"生产订单_{o.order_no}.xlsx")
+    export_order_detail(path, o, bom, reqs, fac, posted_total, planned_total, posted_count)
+    return send_file(path, as_attachment=True, download_name=os.path.basename(path))
+
+
 @app.route("/order/<int:oid>/pick", methods=["POST"])
 @login_required
 @role_required("admin", "manager")