style(ui): polimento visual — tema, cards, dark mode e landing page

Raio de borda global 0.625rem → 0.7rem; ajustes finos em --card e --border.
DotPattern removido do layout, tela de auth e landing page.
Account-card redesenhado (cores de saldo, tooltip de flags de exclusão).
Budget-card, card-item, calendário (day-cell, event-modal) com layout revisado.
Auth-card-shell simplificado (sem glassmorphism/blob). Landing page com
mainFeatures + extraFeatures em grid único e dark mode nos botões de CTA.
Imagens de preview da landing atualizadas. CSS --data-7..10 removidas.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/features/budgets/components/budgets-page.tsx

@@ -19,14 +19,12 @@ interface BudgetsPageProps {
 	budgets: Budget[];
 	categories: BudgetCategory[];
 	selectedPeriod: string;
-	periodLabel: string;
 }
 
 export function BudgetsPage({
 	budgets,
 	categories,
 	selectedPeriod,
-	periodLabel,
 }: BudgetsPageProps) {
 	const [editOpen, setEditOpen] = useState(false);
 	const [selectedBudget, setSelectedBudget] = useState<Budget | null>(null);
@@ -137,7 +135,6 @@ export function BudgetsPage({
 							<BudgetCard
 								key={budget.id}
 								budget={budget}
-								periodLabel={periodLabel}
 								onEdit={handleEdit}
 								onRemove={handleRemoveRequest}
 							/>