feat(order): 下单支持一口价/师傅报价竞价/用户自主定价三种方式

- 下单页新增计价方式选择；自主定价填写总价，师傅报价单进入报价大厅
- 用户订单详情展示师傅报价列表并可选定师傅；选定后同步师傅、金额与订单状态
- 师傅大厅新增用户定价筛选与按价接单；报价单禁止直接抢单
- 后端订单新增 custom 价态、金额口径统一由 calcAmount 输出
- 报价中状态纳入用户可取消范围；超时回流重新开放报价
- 新增 fa_order.price_type custom 枚举迁移脚本（schema_phase6）

server/application/api/controller/Home.php

@@ -98,6 +98,7 @@ class Home extends Base
 
     /**
      * 费用试算（基础价 + 楼层费 + 加急费 - 优惠）
+     * 支持下单页实时切换：一口价 / 师傅报价 / 用户自主定价
      */
     public function calc()
     {
@@ -110,28 +111,48 @@ class Home extends Base
             'floor'        => (int)$this->request->param('floor', 1),
             'has_elevator' => (int)$this->request->param('has_elevator', 1),
             'urgent'       => (int)$this->request->param('urgent', 0),
-        ], (int)$this->request->param('coupon_id', 0), $this->uid());
+        ], (int)$this->request->param('coupon_id', 0), $this->uid(),
+            (string)$this->request->param('price_type', ''),
+            (float)$this->request->param('user_price', 0));
 
         $this->success('', $result);
     }
 
     /**
      * 金额计算（下单与试算共用，保证前后端口径一致）
+     *
+     * @param array  $service   服务行
+     * @param array  $params    floor / has_elevator / urgent
+     * @param int    $couponId  用户优惠券 id
+     * @param int    $uid       用户 id
+     * @param string $priceType 计价方式：fixed 一口价 / quote 师傅报价 / custom 用户自主定价
+     * @param float  $userPrice 用户自主定价金额（总价，含楼层/加急）
      */
-    public static function calcAmount($service, $params, $couponId = 0, $uid = 0)
+    public static function calcAmount($service, $params, $couponId = 0, $uid = 0, $priceType = '', $userPrice = 0)
     {
+        $allowTypes = ['fixed', 'quote', 'range', 'custom'];
+        $type = in_array($priceType, $allowTypes, true) ? $priceType : $service['price_type'];
+
         $base = (float)$service['base_price'];
-        $floor = max(0, (int)$params['floor']);
-        $freeFloor = (int)$service['free_floor'];
-        $floorFee = (float)$service['floor_fee'];
-
         $floorAmount = 0;
-        if ((int)$params['has_elevator'] === 0 && $floor > $freeFloor) {
-            $floorAmount = ($floor - $freeFloor) * $floorFee;
-        }
+        $urgentAmount = 0;
 
-        $urgentAmount = (int)$params['urgent'] === 1 ? round($base * 0.2, 2) : 0;
-        $total = round($base + $floorAmount + $urgentAmount, 2);
+        if ($type === 'custom') {
+            // 用户自主定价：出价即订单总价，已包含楼层费/加急费，师傅按此价接单
+            $base = max(0, round((float)$userPrice, 2));
+            $total = $base;
+        } else {
+            $floor = max(0, (int)$params['floor']);
+            $freeFloor = (int)$service['free_floor'];
+            $floorFee = (float)$service['floor_fee'];
+
+            if ((int)$params['has_elevator'] === 0 && $floor > $freeFloor) {
+                $floorAmount = ($floor - $freeFloor) * $floorFee;
+            }
+
+            $urgentAmount = (int)$params['urgent'] === 1 ? round($base * 0.2, 2) : 0;
+            $total = round($base + $floorAmount + $urgentAmount, 2);
+        }
 
         $discount = 0;
         $couponInfo = null;
@@ -151,7 +172,8 @@ class Home extends Base
         }
 
         return [
-            'price_type'      => $service['price_type'],
+            'price_type'      => $type,
+            'user_price'      => $type === 'custom' ? round($base, 2) : 0,
             'base_amount'     => round($base, 2),
             'floor_amount'    => round($floorAmount, 2),
             'urgent_amount'   => round($urgentAmount, 2),
@@ -159,8 +181,8 @@ class Home extends Base
             'discount_amount' => round($discount, 2),
             'pay_amount'      => max(0, round($total - $discount, 2)),
             'coupon'          => $couponInfo,
-            'free_floor'      => $freeFloor,
-            'floor_fee'       => round($floorFee, 2),
+            'free_floor'      => $type === 'custom' ? 0 : (int)$service['free_floor'],
+            'floor_fee'       => $type === 'custom' ? 0 : round((float)$service['floor_fee'], 2),
         ];
     }