Implement standalone FromChat Protocol

frontend/packages/fromchat-protocol/src/index.ts

@@ -0,0 +1,20 @@
+export { FromChatProtocol } from "./protocol/FromChatProtocol";
+export type { EncryptedMessage } from "./protocol/types";
+
+// Export crypto functions
+export { generateX25519KeyPair, ecdhSharedSecret, deriveWrappingKey } from "./crypto/asymmetric";
+export type { X25519KeyPair } from "./crypto/asymmetric";
+export { importAesGcmKey, aesGcmEncrypt, aesGcmDecrypt } from "./crypto/symmetric";
+export type { AesGcmCiphertext } from "./crypto/symmetric";
+export { hkdfExtractAndExpand, randomBytes, importPassword, deriveKEK } from "./crypto/kdf";
+
+// Export backup functions
+export {
+	encryptBackupWithPassword,
+	decryptBackupWithPassword,
+	encodeBlob,
+	decodeBlob,
+	serializeBundle,
+	deserializeBundle
+} from "./backup/backup";
+export type { PrivateKeyBundle, EncryptedBackupBlob } from "./backup/backup";