feat: adição de novos ícones SVG e configuração do ambiente

- Adicionados ícones SVG para ChatGPT, Claude, Gemini e OpenRouter
- Implementados ícones para modos claro e escuro do ChatGPT
- Criado script de inicialização para PostgreSQL com extensão pgcrypto
- Adicionado script de configuração de ambiente que faz backup do .env
- Configurado tsconfig.json para TypeScript com opções de compilação

lib/lancamentos/formatting-helpers.ts

@@ -0,0 +1,94 @@
+/**
+ * Formatting helpers for displaying lancamento data
+ */
+
+/**
+ * Capitalizes the first letter of a string
+ */
+function capitalize(value: string): string {
+  return value.length > 0 ? value[0]?.toUpperCase().concat(value.slice(1)) : value;
+}
+
+/**
+ * Currency formatter for pt-BR locale (BRL)
+ */
+export const currencyFormatter = new Intl.NumberFormat("pt-BR", {
+  style: "currency",
+  currency: "BRL",
+});
+
+/**
+ * Date formatter for pt-BR locale (dd/mm/yyyy)
+ */
+export const dateFormatter = new Intl.DateTimeFormat("pt-BR", {
+  day: "2-digit",
+  month: "2-digit",
+  year: "numeric",
+});
+
+/**
+ * Month formatter for pt-BR locale (Month Year)
+ */
+export const monthFormatter = new Intl.DateTimeFormat("pt-BR", {
+  month: "long",
+  year: "numeric",
+});
+
+/**
+ * Formats a date string to localized format
+ * @param value - ISO date string or null
+ * @returns Formatted date string or "—"
+ * @example formatDate("2024-01-15") => "15/01/2024"
+ */
+export function formatDate(value?: string | null): string {
+  if (!value) return "—";
+  const date = new Date(value);
+  if (Number.isNaN(date.getTime())) return "—";
+  return dateFormatter.format(date);
+}
+
+/**
+ * Formats a period (YYYY-MM) to localized month label
+ * @param value - Period string (YYYY-MM) or null
+ * @returns Formatted period string or "—"
+ * @example formatPeriod("2024-01") => "Janeiro 2024"
+ */
+export function formatPeriod(value?: string | null): string {
+  if (!value) return "—";
+  const [year, month] = value.split("-").map(Number);
+  if (!year || !month) return value;
+  const date = new Date(year, month - 1, 1);
+  return capitalize(monthFormatter.format(date));
+}
+
+/**
+ * Formats a condition string with proper capitalization
+ * @param value - Condition string or null
+ * @returns Formatted condition string or "—"
+ * @example formatCondition("vista") => "À vista"
+ */
+export function formatCondition(value?: string | null): string {
+  if (!value) return "—";
+  if (value.toLowerCase() === "vista") return "À vista";
+  return capitalize(value);
+}
+
+/**
+ * Gets the badge variant for a transaction type
+ * @param type - Transaction type (Receita/Despesa)
+ * @returns Badge variant
+ */
+export function getTransactionBadgeVariant(type?: string | null): "default" | "destructive" | "secondary" {
+  if (!type) return "secondary";
+  return type.toLowerCase() === "receita" ? "default" : "destructive";
+}
+
+/**
+ * Formats currency value
+ * @param value - Numeric value
+ * @returns Formatted currency string
+ * @example formatCurrency(1234.56) => "R$ 1.234,56"
+ */
+export function formatCurrency(value: number): string {
+  return currencyFormatter.format(value);
+}