Refactor code structure for improved readability and maintainability

app/src/main/java/com/rosetta/messenger/crypto/CryptoManager.kt

@@ -73,9 +73,10 @@ object CryptoManager {
     }
     
     /**
-     * Generate key pair from private key using secp256k1 curve
+     * Generate key pair from seed phrase using secp256k1 curve
      */
-    fun generateKeyPairFromSeed(privateKeyHex: String): KeyPairData {
+    fun generateKeyPairFromSeed(seedPhrase: List<String>): KeyPairData {
+        val privateKeyHex = seedPhraseToPrivateKey(seedPhrase)
         val ecSpec = ECNamedCurveTable.getParameterSpec("secp256k1")
         
         // Use first 32 bytes of private key for secp256k1
@@ -109,7 +110,7 @@ object CryptoManager {
     /**
      * Encrypt data with password using PBKDF2 + AES
      */
-    fun encryptWithPassword(password: String, data: String): String {
+    fun encryptWithPassword(data: String, password: String): String {
         // Compress data
         val compressed = compress(data.toByteArray())
         
@@ -139,7 +140,7 @@ object CryptoManager {
     /**
      * Decrypt data with password
      */
-    fun decryptWithPassword(password: String, encryptedData: String): String? {
+    fun decryptWithPassword(encryptedData: String, password: String): String? {
         return try {
             val parts = encryptedData.split(":")
             if (parts.size != 2) return null