Remove future date validation for join_date

Allow join_date to be set in the future. Only validation remaining
is that exit_date must be after join_date.

lib/membership/member.ex

@@ -242,6 +242,63 @@ defmodule Mv.Membership.Member do
                  {:ok, member}
                end
              end)
+
+      # Trigger cycle regeneration when join_date or exit_date changes
+      # Regenerates cycles based on new dates
+      # Note: Cycle generation runs synchronously in test environment, asynchronously in production
+      # CycleGenerator uses advisory locks and transactions internally to prevent race conditions
+      change after_action(fn changeset, member, _context ->
+               join_date_changed = Ash.Changeset.changing_attribute?(changeset, :join_date)
+               exit_date_changed = Ash.Changeset.changing_attribute?(changeset, :exit_date)
+
+               if (join_date_changed || exit_date_changed) && member.membership_fee_type_id do
+                 if Application.get_env(:mv, :sql_sandbox, false) do
+                   # Run synchronously in test environment for DB sandbox compatibility
+                   # Use skip_lock?: true to avoid nested transactions (after_action runs within action transaction)
+                   # Return notifications to Ash so they are sent after commit
+                   case Mv.MembershipFees.CycleGenerator.generate_cycles_for_member(
+                          member.id,
+                          today: Date.utc_today(),
+                          skip_lock?: true
+                        ) do
+                     {:ok, _cycles, notifications} ->
+                       {:ok, member, notifications}
+
+                     {:error, reason} ->
+                       require Logger
+
+                       Logger.warning(
+                         "Failed to regenerate cycles for member #{member.id}: #{inspect(reason)}"
+                       )
+
+                       {:ok, member}
+                   end
+                 else
+                   # Run asynchronously in other environments
+                   # Send notifications explicitly since they cannot be returned via after_action
+                   Task.start(fn ->
+                     case Mv.MembershipFees.CycleGenerator.generate_cycles_for_member(member.id) do
+                       {:ok, _cycles, notifications} ->
+                         # Send notifications manually for async case
+                         if Enum.any?(notifications) do
+                           Ash.Notifier.notify(notifications)
+                         end
+
+                       {:error, reason} ->
+                         require Logger
+
+                         Logger.warning(
+                           "Failed to regenerate cycles for member #{member.id}: #{inspect(reason)}"
+                         )
+                     end
+                   end)
+
+                   {:ok, member}
+                 end
+               else
+                 {:ok, member}
+               end
+             end)
     end
 
     # Action to handle fuzzy search on specific fields
@@ -395,11 +452,6 @@ defmodule Mv.Membership.Member do
       end
     end
 
-    # Join date not in the future
-    validate compare(:join_date, less_than_or_equal_to: &Date.utc_today/0),
-      where: [present(:join_date)],
-      message: "cannot be in the future"
-
     # Exit date not before join date
     validate compare(:exit_date, greater_than: :join_date),
       where: [present([:join_date, :exit_date])],