fix: improve amount validation, layout, and remove duplicate button

- Add oninput validation for amount field to catch invalid input immediately
- Fix Current Cycle layout with whitespace-nowrap and wider width
- Remove duplicate Regenerate Missing Cycles button (same functionality)
- Add tooltip to Regenerate Cycles button explaining functionality

lib/mv_web/live/member_live/show/membership_fees_component.ex

@@ -49,18 +49,11 @@ defmodule MvWeb.MemberLive.Show.MembershipFeesComponent do
             phx-click="regenerate_cycles"
             phx-target={@myself}
             class={["btn btn-sm btn-outline", if(@regenerating, do: "btn-disabled", else: "")]}
+            title={gettext("Generate cycles from the last existing cycle to today")}
           >
             <.icon name="hero-arrow-path" class="size-4" />
             {if(@regenerating, do: gettext("Regenerating..."), else: gettext("Regenerate Cycles"))}
           </.button>
-          <.button
-            phx-click="regenerate_missing_cycles"
-            phx-target={@myself}
-            class={["btn btn-sm btn-outline", if(@regenerating, do: "btn-disabled", else: "")]}
-          >
-            <.icon name="hero-plus-circle" class="size-4" />
-            {gettext("Regenerate Missing Cycles")}
-          </.button>
         </div>
 
         <%!-- Cycles Table --%>
@@ -431,10 +424,6 @@ defmodule MvWeb.MemberLive.Show.MembershipFeesComponent do
     end
   end
 
-  def handle_event("regenerate_missing_cycles", _params, socket) do
-    # Same as regenerate_cycles - CycleGenerator already handles missing cycles only
-    handle_event("regenerate_cycles", %{}, socket)
-  end
 
   def handle_event("edit_cycle_amount", %{"cycle_id" => cycle_id}, socket) do
     cycle = find_cycle(socket.assigns.cycles, cycle_id)