Implement password verification and enhance BackupScreen UI

- Added password verification logic in MainActivity to decrypt the private key and seed phrase.
- Updated BackupScreen to handle password verification asynchronously using coroutines.
- Improved UI layout for displaying seed phrases in two columns with colored words.
- Added a copy button for the seed phrase with clipboard functionality.
- Introduced a new composable function, WordItem, for better visual representation of seed phrase words.

app/src/main/java/com/rosetta/messenger/MainActivity.kt

@@ -542,10 +542,35 @@ fun MainScreen(
                         showSafetyScreen = true
                     },
                     onVerifyPassword = { password ->
-                        // TODO: Implement password verification
-                        if (password == "test") {
-                            "word1 word2 word3 word4 word5 word6 word7 word8 word9 word10 word11 word12"
-                        } else null
+                        // Verify password by trying to decrypt the private key
+                        try {
+                            val publicKey = account?.publicKey ?: return@BackupScreen null
+                            val accountManager = AccountManager(context)
+                            val encryptedAccount = accountManager.getAccount(publicKey)
+                            
+                            if (encryptedAccount != null) {
+                                // Try to decrypt private key with password
+                                val decryptedPrivateKey = com.rosetta.messenger.crypto.CryptoManager.decryptWithPassword(
+                                    encryptedAccount.encryptedPrivateKey,
+                                    password
+                                )
+                                
+                                if (decryptedPrivateKey != null) {
+                                    // Password is correct, decrypt seed phrase
+                                    com.rosetta.messenger.crypto.CryptoManager.decryptWithPassword(
+                                        encryptedAccount.encryptedSeedPhrase,
+                                        password
+                                    )
+                                } else {
+                                    null
+                                }
+                            } else {
+                                null
+                            }
+                        } catch (e: Exception) {
+                            Log.e("MainActivity", "Error verifying password", e)
+                            null
+                        }
                     }
                 )
             }

app/src/main/java/com/rosetta/messenger/ui/settings/BackupScreen.kt

@@ -9,9 +9,13 @@ import androidx.compose.foundation.layout.statusBars
 import androidx.compose.foundation.layout.windowInsetsPadding
 import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.foundation.text.BasicTextField
+import androidx.compose.foundation.text.KeyboardOptions
 import androidx.compose.foundation.verticalScroll
+import androidx.compose.ui.draw.clip
+import androidx.compose.ui.graphics.SolidColor
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.filled.ArrowBack
+import androidx.compose.material.icons.filled.ContentCopy
 import androidx.compose.material.icons.filled.Visibility
 import androidx.compose.material.icons.filled.VisibilityOff
 import androidx.compose.material.icons.filled.Warning
@@ -26,18 +30,21 @@ import androidx.compose.ui.text.input.PasswordVisualTransformation
 import androidx.compose.ui.text.input.VisualTransformation
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
+import kotlinx.coroutines.launch
+import com.airbnb.lottie.compose.*
 
 @Composable
 fun BackupScreen(
     isDarkTheme: Boolean,
     onBack: () -> Unit,
-    onVerifyPassword: (String) -> String? // Returns seed phrase if password is correct
+    onVerifyPassword: suspend (String) -> String? // Returns seed phrase if password is correct
 ) {
     val backgroundColor = if (isDarkTheme) Color(0xFF1A1A1A) else Color(0xFFFFFFFF)
     val surfaceColor = if (isDarkTheme) Color(0xFF2C2C2E) else Color(0xFFF2F2F7)
     val textColor = if (isDarkTheme) Color.White else Color.Black
     val secondaryTextColor = if (isDarkTheme) Color(0xFF8E8E93) else Color(0xFF666666)
 
+    val scope = rememberCoroutineScope()
     var password by remember { mutableStateOf("") }
     var seedPhrase by remember { mutableStateOf<String?>(null) }
     var passwordVisible by remember { mutableStateOf(false) }
@@ -91,11 +98,15 @@ fun BackupScreen(
                     modifier = Modifier.padding(16.dp),
                     horizontalAlignment = Alignment.CenterHorizontally
                 ) {
-                    Icon(
-                        imageVector = Icons.Filled.Warning,
-                        contentDescription = null,
-                        tint = Color(0xFFFFAC00),
-                        modifier = Modifier.size(48.dp)
+                    val composition by rememberLottieComposition(LottieCompositionSpec.Asset("lottie/shush.json"))
+                    val progress by animateLottieCompositionAsState(
+                        composition = composition,
+                        iterations = 1
+                    )
+                    LottieAnimation(
+                        composition = composition,
+                        progress = { progress },
+                        modifier = Modifier.size(80.dp)
                     )
                     Spacer(modifier = Modifier.height(12.dp))
                     Text(
@@ -128,9 +139,11 @@ fun BackupScreen(
                             onValueChange = { newValue ->
                                 password = newValue
                                 // Try to verify password
-                                val result = onVerifyPassword(newValue)
-                                if (result != null) {
-                                    seedPhrase = result
+                                scope.launch {
+                                    val result = onVerifyPassword(newValue)
+                                    if (result != null) {
+                                        seedPhrase = result
+                                    }
                                 }
                             },
                             modifier = Modifier.weight(1f),
@@ -138,6 +151,7 @@ fun BackupScreen(
                                 color = textColor,
                                 fontSize = 15.sp
                             ),
+                            cursorBrush = SolidColor(textColor),
                             visualTransformation = if (passwordVisible) 
                                 VisualTransformation.None 
                             else 
@@ -182,33 +196,80 @@ fun BackupScreen(
                     lineHeight = 20.sp
                 )
             } else {
-                // Seed Phrase Display
-                Surface(
+                // Seed Phrase Display with colored words
+                Spacer(modifier = Modifier.height(8.dp))
+                
+                val words = seedPhrase!!.split(" ")
+                
+                // Two column layout like in SeedPhraseScreen
+                Row(
                     modifier = Modifier.fillMaxWidth(),
-                    color = surfaceColor,
-                    shape = RoundedCornerShape(10.dp)
+                    horizontalArrangement = Arrangement.spacedBy(12.dp)
                 ) {
-                    Column(modifier = Modifier.padding(20.dp)) {
-                        val words = seedPhrase!!.split(" ")
-                        words.chunked(3).forEach { rowWords ->
-                            Row(
-                                modifier = Modifier.fillMaxWidth(),
-                                horizontalArrangement = Arrangement.SpaceBetween
-                            ) {
-                                rowWords.forEachIndexed { index, word ->
-                                    Text(
-                                        text = "${words.indexOf(word) + 1}. $word",
-                                        fontSize = 14.sp,
-                                        fontWeight = FontWeight.Medium,
-                                        color = textColor,
-                                        modifier = Modifier.padding(vertical = 4.dp)
-                                    )
-                                }
+                    // Left column (words 1-6)
+                    Column(
+                        modifier = Modifier.weight(1f),
+                        verticalArrangement = Arrangement.spacedBy(12.dp)
+                    ) {
+                        for (i in 0..5) {
+                            if (i < words.size) {
+                                WordItem(
+                                    number = i + 1,
+                                    word = words[i],
+                                    isDarkTheme = isDarkTheme
+                                )
+                            }
+                        }
+                    }
+                    
+                    // Right column (words 7-12)
+                    Column(
+                        modifier = Modifier.weight(1f),
+                        verticalArrangement = Arrangement.spacedBy(12.dp)
+                    ) {
+                        for (i in 6..11) {
+                            if (i < words.size) {
+                                WordItem(
+                                    number = i + 1,
+                                    word = words[i],
+                                    isDarkTheme = isDarkTheme
+                                )
                             }
                         }
                     }
                 }
 
+                Spacer(modifier = Modifier.height(16.dp))
+                
+                // Copy button
+                val context = androidx.compose.ui.platform.LocalContext.current
+                Button(
+                    onClick = {
+                        val clipboard = context.getSystemService(android.content.Context.CLIPBOARD_SERVICE) as android.content.ClipboardManager
+                        val clip = android.content.ClipData.newPlainText("Seed Phrase", seedPhrase)
+                        clipboard.setPrimaryClip(clip)
+                    },
+                    modifier = Modifier.fillMaxWidth(),
+                    colors = ButtonDefaults.buttonColors(
+                        containerColor = Color(0xFF248AE6)
+                    ),
+                    shape = RoundedCornerShape(10.dp)
+                ) {
+                    Icon(
+                        imageVector = Icons.Filled.ContentCopy,
+                        contentDescription = null,
+                        modifier = Modifier.size(20.dp)
+                    )
+                    Spacer(modifier = Modifier.width(8.dp))
+                    Text(
+                        text = "Copy Seed Phrase",
+                        fontSize = 15.sp,
+                        fontWeight = FontWeight.Medium
+                    )
+                }
+
+                Spacer(modifier = Modifier.height(16.dp))
+
                 Text(
                     text = "Please don't share your seed phrase! The administration will never ask you for it.",
                     fontSize = 14.sp,
@@ -222,3 +283,59 @@ fun BackupScreen(
         }
     }
 }
+
+@Composable
+private fun WordItem(
+    number: Int,
+    word: String,
+    isDarkTheme: Boolean,
+    modifier: Modifier = Modifier
+) {
+    val numberColor = if (isDarkTheme) Color(0xFF888888) else Color(0xFF999999)
+    
+    // Beautiful solid colors that fit the theme
+    val wordColors = listOf(
+        Color(0xFF5E9FFF), // Soft blue
+        Color(0xFFFF7EB3), // Soft pink
+        Color(0xFF7B68EE), // Medium purple
+        Color(0xFF50C878), // Emerald green
+        Color(0xFFFF6B6B), // Coral red
+        Color(0xFF4ECDC4), // Teal
+        Color(0xFFFFB347), // Pastel orange
+        Color(0xFFBA55D3), // Medium orchid
+        Color(0xFF87CEEB), // Sky blue
+        Color(0xFFDDA0DD), // Plum
+        Color(0xFF98D8C8), // Mint
+        Color(0xFFF7DC6F)  // Soft yellow
+    )
+    
+    val wordColor = wordColors[(number - 1) % wordColors.size]
+    val bgColor = if (isDarkTheme) Color(0xFF2A2A2A) else Color(0xFFF5F5F5)
+    
+    Box(
+        modifier = modifier
+            .fillMaxWidth()
+            .clip(RoundedCornerShape(12.dp))
+            .background(bgColor)
+            .padding(horizontal = 16.dp, vertical = 14.dp)
+    ) {
+        Row(
+            verticalAlignment = Alignment.CenterVertically,
+            modifier = Modifier.fillMaxWidth()
+        ) {
+            Text(
+                text = "$number.",
+                fontSize = 15.sp,
+                color = numberColor,
+                modifier = Modifier.width(28.dp)
+            )
+            Text(
+                text = word,
+                fontSize = 17.sp,
+                fontWeight = FontWeight.SemiBold,
+                color = wordColor,
+                fontFamily = androidx.compose.ui.text.font.FontFamily.Monospace
+            )
+        }
+    }
+}