style: ajustes visuais em notificação, timeline e layout

- Alterar ícone de notificação para outline (RiNotification3Line)
- Mudar cor da timeline de parcelas de azul para verde
- Reduzir padding do month picker (p-5 → p-4)
- Remover md:py-6 do layout dashboard

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

components/notificacoes/notification-bell.tsx

@@ -25,7 +25,7 @@ import { cn } from "@/lib/utils/ui";
 import {
   RiAlertFill,
   RiCheckboxCircleFill,
-  RiNotification3Fill,
+  RiNotification3Line,
   RiTimeLine,
 } from "@remixicon/react";
 import { useState } from "react";
@@ -82,7 +82,7 @@ export function NotificationBell({
                 "data-[state=open]:bg-accent/60 data-[state=open]:text-foreground border"
               )}
             >
-              <RiNotification3Fill
+              <RiNotification3Line
                 className={cn(
                   "size-4 transition-transform duration-200",
                   open ? "scale-90" : "scale-100"