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

components/calendario/calendar-grid.tsx

@@ -0,0 +1,42 @@
+"use client";
+
+import { cn } from "@/lib/utils/ui";
+
+import type { CalendarDay } from "@/components/calendario/types";
+import { WEEK_DAYS_SHORT } from "@/components/calendario/utils";
+import { DayCell } from "@/components/calendario/day-cell";
+
+type CalendarGridProps = {
+  days: CalendarDay[];
+  onSelectDay: (day: CalendarDay) => void;
+  onCreateDay: (day: CalendarDay) => void;
+};
+
+export function CalendarGrid({
+  days,
+  onSelectDay,
+  onCreateDay,
+}: CalendarGridProps) {
+  return (
+    <div className="overflow-hidden rounded-lg bg-card drop-shadow-xs px-2">
+      <div className="grid grid-cols-7 text-sm font-semibold uppercase tracking-wide text-muted-foreground">
+        {WEEK_DAYS_SHORT.map((dayName) => (
+          <span key={dayName} className="px-3 py-2 text-center">
+            {dayName}
+          </span>
+        ))}
+      </div>
+
+      <div className="grid grid-cols-7 gap-px bg-border/60 px-px pb-px pt-px">
+        {days.map((day) => (
+          <div
+            key={day.date}
+            className={cn("h-[150px] bg-card p-0.5", !day.isCurrentMonth && "")}
+          >
+            <DayCell day={day} onSelect={onSelectDay} onCreate={onCreateDay} />
+          </div>
+        ))}
+      </div>
+    </div>
+  );
+}