fix(pickup): remove mocked fine-slot reservation preview

src/Api/TakeoutSaaS.TenantApi/Controllers/StorePickupController.cs

@@ -390,6 +390,7 @@ public sealed class StorePickupController(
         int minAdvanceHours)
     {
         var now = DateTime.Now;
+        var normalizedCapacity = Math.Max(0, slotCapacity);
         var results = new List<PickupPreviewSlotDto>();
         for (var minutes = startMinutes; minutes <= endMinutes; minutes += intervalMinutes)
         {
@@ -397,18 +398,8 @@ public sealed class StorePickupController(
             var slotMinute = minutes % 60;
             var slotTime = new TimeSpan(slotHour, slotMinute, 0);
             var slotDateTime = date.Date.Add(slotTime);
-            var hash = GetStableHash($"{StoreApiHelpers.ToDateOnly(date)}|{slotHour:00}:{slotMinute:00}");
-            var booked = hash % (slotCapacity + 1);
-            if (hash % 7 == 0)
-            {
-                booked = slotCapacity;
-            }
-            else if (hash % 5 == 0)
-            {
-                booked = Math.Max(0, slotCapacity - 1);
-            }
-
-            var remaining = Math.Max(0, slotCapacity - booked);
+            // 当前阶段仅做规则预览，不再伪造预约占用数据。
+            var remaining = normalizedCapacity;
             var status = slotDateTime <= now.AddHours(minAdvanceHours)
                 ? "expired"
                 : remaining == 0
@@ -428,17 +419,6 @@ public sealed class StorePickupController(
         return results;
     }
 
-    private static int GetStableHash(string value)
-    {
-        var hash = 0;
-        foreach (var ch in value)
-        {
-            hash = (hash * 31 + ch) & int.MaxValue;
-        }
-
-        return hash;
-    }
-
     private static string GetWeekdayLabel(int dayOfWeek)
     {
         return dayOfWeek switch