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

hooks/use-calculator-keyboard.ts

@@ -0,0 +1,94 @@
+import { useEffect } from "react";
+
+type UseCalculatorKeyboardParams = {
+  canCopy: boolean;
+  onCopy: () => void | Promise<void>;
+  onPaste: () => void | Promise<void>;
+};
+
+function shouldIgnoreForEditableTarget(target: EventTarget | null): boolean {
+  if (!target || !(target instanceof HTMLElement)) {
+    return false;
+  }
+
+  const tagName = target.tagName;
+  return (
+    tagName === "INPUT" ||
+    tagName === "TEXTAREA" ||
+    target.isContentEditable
+  );
+}
+
+export function useCalculatorKeyboard({
+  canCopy,
+  onCopy,
+  onPaste,
+}: UseCalculatorKeyboardParams) {
+  useEffect(() => {
+    if (!canCopy) {
+      return;
+    }
+
+    const handleKeyDown = (event: KeyboardEvent) => {
+      if (!(event.ctrlKey || event.metaKey)) {
+        return;
+      }
+
+      if (shouldIgnoreForEditableTarget(event.target)) {
+        return;
+      }
+
+      if (event.key.toLowerCase() !== "c") {
+        return;
+      }
+
+      const selection = window.getSelection();
+      if (selection && selection.toString().trim().length > 0) {
+        return;
+      }
+
+      event.preventDefault();
+      void onCopy();
+    };
+
+    document.addEventListener("keydown", handleKeyDown);
+
+    return () => {
+      document.removeEventListener("keydown", handleKeyDown);
+    };
+  }, [canCopy, onCopy]);
+
+  useEffect(() => {
+    const handlePasteShortcut = (event: KeyboardEvent) => {
+      if (!(event.ctrlKey || event.metaKey)) {
+        return;
+      }
+
+      if (event.key.toLowerCase() !== "v") {
+        return;
+      }
+
+      if (shouldIgnoreForEditableTarget(event.target)) {
+        return;
+      }
+
+      const selection = window.getSelection();
+      if (selection && selection.toString().trim().length > 0) {
+        return;
+      }
+
+      if (!navigator.clipboard?.readText) {
+        return;
+      }
+
+      event.preventDefault();
+      void onPaste();
+    };
+
+    document.addEventListener("keydown", handlePasteShortcut);
+
+    return () => {
+      document.removeEventListener("keydown", handlePasteShortcut);
+    };
+  }, [onPaste]);
+}