Fix chat send button behavior

Rosetta/Core/Crypto/CryptoManager.swift

@@ -96,24 +96,38 @@ final class CryptoManager: @unchecked Sendable {
             throw CryptoError.invalidData("Malformed encrypted string")
         }
 
-        // Try current format: PBKDF2-SHA1 + AES-CBC + zlib inflate
-        if let result = try? {
-            let key = CryptoPrimitives.pbkdf2(
-                password: password, salt: "rosetta", iterations: 1000,
-                keyLength: 32, prf: CCPseudoRandomAlgorithm(kCCPRFHmacAlgSHA1)
-            )
-            let decrypted = try CryptoPrimitives.aesCBCDecrypt(ciphertext, key: key, iv: iv)
-            return try CryptoPrimitives.rawInflate(decrypted)
-        }() {
-            return result
+        let prfOrder: [CCPseudoRandomAlgorithm] = [
+            CCPseudoRandomAlgorithm(kCCPRFHmacAlgSHA256), // Desktop/Android current
+            CCPseudoRandomAlgorithm(kCCPRFHmacAlgSHA1),   // Legacy iOS
+        ]
+
+        // 1) Preferred path: AES-CBC + zlib inflate
+        for prf in prfOrder {
+            if let result = try? decryptWithPassword(
+                ciphertext: ciphertext,
+                iv: iv,
+                password: password,
+                prf: prf,
+                expectsCompressed: true
+            ) {
+                return result
+            }
         }
 
-        // Fallback: legacy iOS format (PBKDF2-SHA256, no compression)
-        let legacyKey = CryptoPrimitives.pbkdf2(
-            password: password, salt: "rosetta", iterations: 1000,
-            keyLength: 32, prf: CCPseudoRandomAlgorithm(kCCPRFHmacAlgSHA256)
-        )
-        return try CryptoPrimitives.aesCBCDecrypt(ciphertext, key: legacyKey, iv: iv)
+        // 2) Fallback: AES-CBC without compression (very old/legacy payloads)
+        for prf in prfOrder {
+            if let result = try? decryptWithPassword(
+                ciphertext: ciphertext,
+                iv: iv,
+                password: password,
+                prf: prf,
+                expectsCompressed: false
+            ) {
+                return result
+            }
+        }
+
+        throw CryptoError.decryptionFailed
     }
 
     // MARK: - Utilities
@@ -128,6 +142,29 @@ final class CryptoManager: @unchecked Sendable {
     }
 }
 
+private extension CryptoManager {
+    func decryptWithPassword(
+        ciphertext: Data,
+        iv: Data,
+        password: String,
+        prf: CCPseudoRandomAlgorithm,
+        expectsCompressed: Bool
+    ) throws -> Data {
+        let key = CryptoPrimitives.pbkdf2(
+            password: password,
+            salt: "rosetta",
+            iterations: 1000,
+            keyLength: 32,
+            prf: prf
+        )
+        let decrypted = try CryptoPrimitives.aesCBCDecrypt(ciphertext, key: key, iv: iv)
+        if expectsCompressed {
+            return try CryptoPrimitives.rawInflate(decrypted)
+        }
+        return decrypted
+    }
+}
+
 // MARK: - BIP39 Internal
 
 private extension CryptoManager {

Rosetta/Core/Crypto/MessageCrypto.swift

@@ -26,37 +26,35 @@ enum MessageCrypto {
         encryptedKey: String,
         myPrivateKeyHex: String
     ) throws -> String {
-        let keyAndNonce = try decryptKeyFromSender(encryptedKey: encryptedKey, myPrivateKeyHex: myPrivateKeyHex)
-
-        guard keyAndNonce.count >= 56 else {
-            throw CryptoError.invalidData("Key+nonce must be 56 bytes, got \(keyAndNonce.count)")
-        }
-
-        let key = keyAndNonce[0..<32]
-        let nonce = keyAndNonce[32..<56]
-
-        let ciphertextData = Data(hexString: ciphertext)
-        let plaintext = try XChaCha20Engine.decrypt(
-            ciphertextWithTag: ciphertextData, key: Data(key), nonce: Data(nonce)
+        let keyCandidates = try decryptKeyFromSenderCandidates(
+            encryptedKey: encryptedKey,
+            myPrivateKeyHex: myPrivateKeyHex
         )
 
-        guard let text = String(data: plaintext, encoding: .utf8) else {
-            throw CryptoError.invalidData("Decrypted data is not valid UTF-8")
+        var lastError: Error?
+        for keyAndNonce in keyCandidates where keyAndNonce.count >= 56 {
+            do {
+                return try decryptWithKeyAndNonce(ciphertext: ciphertext, keyAndNonce: keyAndNonce)
+            } catch {
+                lastError = error
+            }
         }
-        return text
+
+        if let lastError {
+            throw lastError
+        }
+        throw CryptoError.invalidData("Failed to decrypt message content with all key candidates")
     }
 
     /// Encrypts a message using XChaCha20-Poly1305 + ECDH for the recipient.
     /// - Parameters:
     ///   - plaintext: The message text.
     ///   - recipientPublicKeyHex: Recipient's secp256k1 compressed public key (hex).
-    ///   - senderPrivateKeyHex: Sender's private key (hex) — used to also encrypt for self.
-    /// - Returns: Tuple of (content: hex ciphertext+tag, chachaKey: base64 encrypted key for recipient, aesChachaKey: base64 encrypted key for sender).
+    /// - Returns: Tuple of (content: hex ciphertext+tag, chachaKey: base64 encrypted key for recipient, plainKeyAndNonce: raw key+nonce bytes).
     static func encryptOutgoing(
         plaintext: String,
-        recipientPublicKeyHex: String,
-        senderPrivateKeyHex: String
-    ) throws -> (content: String, chachaKey: String, aesChachaKey: String) {
+        recipientPublicKeyHex: String
+    ) throws -> (content: String, chachaKey: String, plainKeyAndNonce: Data) {
         guard let plaintextData = plaintext.data(using: .utf8) else {
             throw CryptoError.invalidData("Cannot encode plaintext as UTF-8")
         }
@@ -73,34 +71,60 @@ enum MessageCrypto {
             keyAndNonce: keyAndNonce, recipientPublicKeyHex: recipientPublicKeyHex
         )
 
-        let senderPrivKey = try P256K.Signing.PrivateKey(
-            dataRepresentation: Data(hexString: senderPrivateKeyHex), format: .compressed
-        )
-        let senderPublicKeyHex = senderPrivKey.publicKey.dataRepresentation.hexString
-
-        let aesChachaKey = try encryptKeyForRecipient(
-            keyAndNonce: keyAndNonce, recipientPublicKeyHex: senderPublicKeyHex
-        )
-
         return (
             content: ciphertextWithTag.hexString,
             chachaKey: chachaKey,
-            aesChachaKey: aesChachaKey
+            plainKeyAndNonce: keyAndNonce
         )
     }
+
+    /// Decrypts an incoming message using already decrypted key+nonce bytes.
+    /// Mirrors Android `decryptIncomingWithPlainKey`.
+    static func decryptIncomingWithPlainKey(
+        ciphertext: String,
+        plainKeyAndNonce: Data
+    ) throws -> String {
+        guard plainKeyAndNonce.count >= 56 else {
+            throw CryptoError.invalidData("Key+nonce must be 56 bytes, got \(plainKeyAndNonce.count)")
+        }
+        return try decryptWithKeyAndNonce(ciphertext: ciphertext, keyAndNonce: plainKeyAndNonce)
+    }
+
+    /// Android parity helper:
+    /// `String(bytes, UTF_8)` (replacement for invalid sequences) + `toByteArray(ISO_8859_1)`.
+    static func androidUtf8BytesToLatin1Bytes(_ utf8Bytes: Data) -> Data {
+        let decoded = String(decoding: utf8Bytes, as: UTF8.self)
+        if let latin1 = decoded.data(using: .isoLatin1, allowLossyConversion: true) {
+            return latin1
+        }
+        return Data(decoded.unicodeScalars.map { $0.value <= 0xFF ? UInt8($0.value) : UInt8(ascii: "?") })
+    }
 }
 
 // MARK: - ECDH Key Exchange
 
 private extension MessageCrypto {
 
-    /// Decrypts the XChaCha20 key+nonce from the sender using ECDH.
+    /// Decrypts and returns candidate XChaCha20 key+nonce buffers.
     /// Format: Base64(ivHex:encryptedKeyHex:ephemeralPrivateKeyHex)
-    static func decryptKeyFromSender(encryptedKey: String, myPrivateKeyHex: String) throws -> Data {
-        guard let decoded = Data(base64Encoded: encryptedKey),
-              let combined = String(data: decoded, encoding: .utf8) else {
+    /// Supports Android sync shorthand `sync:<aesChachaKey>`.
+    static func decryptKeyFromSenderCandidates(encryptedKey: String, myPrivateKeyHex: String) throws -> [Data] {
+        if encryptedKey.hasPrefix("sync:") {
+            let aesChachaKey = String(encryptedKey.dropFirst("sync:".count))
+            guard !aesChachaKey.isEmpty else {
+                throw CryptoError.invalidData("Invalid sync key format")
+            }
+            let decrypted = try CryptoManager.shared.decryptWithPassword(
+                aesChachaKey,
+                password: myPrivateKeyHex
+            )
+            return [androidUtf8BytesToLatin1Bytes(decrypted)]
+        }
+
+        guard let decoded = Data(base64Encoded: encryptedKey) else {
             throw CryptoError.invalidData("Cannot decode Base64 key")
         }
+        let combined = String(decoding: decoded, as: UTF8.self)
 
         let parts = combined.split(separator: ":", maxSplits: 2).map(String.init)
         guard parts.count == 3 else {
@@ -119,11 +143,14 @@ private extension MessageCrypto {
         let iv = Data(hexString: ivHex)
         let encryptedKeyData = Data(hexString: encryptedKeyHex)
 
+        let normalizedEphemeralPrivateKeyHex = normalizePrivateKeyHex(ephemeralPrivateKeyHex)
+        let normalizedMyPrivateKeyHex = normalizePrivateKeyHex(myPrivateKeyHex)
+
         let ephemeralPrivKey = try P256K.KeyAgreement.PrivateKey(
-            dataRepresentation: Data(hexString: ephemeralPrivateKeyHex), format: .compressed
+            dataRepresentation: Data(hexString: normalizedEphemeralPrivateKeyHex), format: .compressed
         )
         let myPrivKey = try P256K.KeyAgreement.PrivateKey(
-            dataRepresentation: Data(hexString: myPrivateKeyHex), format: .compressed
+            dataRepresentation: Data(hexString: normalizedMyPrivateKeyHex), format: .compressed
         )
 
         // ECDH: ephemeralPrivateKey × myPublicKey → shared point
@@ -131,16 +158,37 @@ private extension MessageCrypto {
             with: myPrivKey.publicKey, format: .compressed
         )
         let sharedSecretData = sharedSecret.withUnsafeBytes { Data($0) }
-        let sharedKey = extractXCoordinate(from: sharedSecretData)
+        let sharedKeyExact = extractXCoordinate(from: sharedSecretData)
+        let sharedKeyLegacy = legacySharedKey(fromExactX: sharedKeyExact)
 
-        // AES-256-CBC decrypt
-        let decryptedBytes = try CryptoPrimitives.aesCBCDecrypt(encryptedKeyData, key: sharedKey, iv: iv)
+        let candidateSharedKeys: [Data] = sharedKeyLegacy == sharedKeyExact
+            ? [sharedKeyExact]
+            : [sharedKeyExact, sharedKeyLegacy]
 
-        // UTF-8 → Latin1 conversion (reverse of JS crypto-js compatibility)
-        guard let utf8String = String(data: decryptedBytes, encoding: .utf8) else {
-            throw CryptoError.invalidData("Decrypted key is not valid UTF-8")
+        var candidates: [Data] = []
+        var seen: Set<Data> = []
+
+        for sharedKey in candidateSharedKeys {
+            guard let decryptedBytes = try? CryptoPrimitives.aesCBCDecrypt(
+                encryptedKeyData,
+                key: sharedKey,
+                iv: iv
+            ) else {
+                continue
+            }
+
+            // Android parity: String(bytes, UTF_8) + toByteArray(ISO_8859_1)
+            let originalBytes = androidUtf8BytesToLatin1Bytes(decryptedBytes)
+            guard originalBytes.count >= 56 else { continue }
+            if seen.insert(originalBytes).inserted {
+                candidates.append(originalBytes)
+            }
         }
-        return Data(utf8String.unicodeScalars.map { UInt8(truncatingIfNeeded: $0.value) })
+
+        guard !candidates.isEmpty else {
+            throw CryptoError.invalidData("Failed to decrypt key with all shared secret variants")
+        }
+        return candidates
     }
 
     /// Encrypts the XChaCha20 key+nonce for a recipient using ECDH.
@@ -157,8 +205,11 @@ private extension MessageCrypto {
         let sharedSecretData = sharedSecret.withUnsafeBytes { Data($0) }
         let sharedKey = extractXCoordinate(from: sharedSecretData)
 
-        // Convert keyAndNonce bytes to UTF-8 string representation (JS Buffer compatibility)
-        let utf8Representation = String(keyAndNonce.map { Character(UnicodeScalar($0)) })
+        // Android parity: String(bytes, ISO_8859_1) -> UTF-8 bytes.
+        guard let latin1String = String(data: keyAndNonce, encoding: .isoLatin1) else {
+            throw CryptoError.encryptionFailed
+        }
+        let utf8Representation = latin1String
         guard let dataToEncrypt = utf8Representation.data(using: .utf8) else {
             throw CryptoError.encryptionFailed
         }
@@ -174,11 +225,66 @@ private extension MessageCrypto {
         return base64
     }
 
-    /// Extracts the 32-byte x-coordinate from a compressed ECDH shared secret.
+    /// Extracts the 32-byte x-coordinate from ECDH shared secret bytes.
     static func extractXCoordinate(from sharedSecretData: Data) -> Data {
+        // Uncompressed point: 0x04 || X(32) || Y(32)
+        if sharedSecretData.count == 65, sharedSecretData.first == 0x04 {
+            return sharedSecretData[1..<33]
+        }
+        // Compressed point: 0x02/0x03 || X(32)
         if sharedSecretData.count == 33 {
             return sharedSecretData[1..<33]
         }
-        return sharedSecretData.prefix(32)
+        // Raw X coordinate (32 bytes)
+        if sharedSecretData.count == 32 {
+            return sharedSecretData
+        }
+        // Defensive fallback: keep last 32 bytes if shape is unexpected.
+        if sharedSecretData.count > 32 {
+            return sharedSecretData.suffix(32)
+        }
+        // Left-pad short variants.
+        return Data(repeating: 0, count: 32 - sharedSecretData.count) + sharedSecretData
+    }
+
+    /// Legacy Android compatibility: x-coordinate serialized through BigInteger loses leading zeros.
+    static func legacySharedKey(fromExactX exactX: Data) -> Data {
+        let trimmed = exactX.drop(while: { $0 == 0 })
+        return trimmed.isEmpty ? Data([0]) : Data(trimmed)
+    }
+
+    /// JS/Android compatibility: private key hex can arrive without leading zero bytes.
+    static func normalizePrivateKeyHex(_ rawHex: String) -> String {
+        var hex = rawHex
+        if hex.count % 2 != 0 {
+            hex = "0" + hex
+        }
+        if hex.count < 64 {
+            return String(repeating: "0", count: 64 - hex.count) + hex
+        }
+        if hex.count > 64 {
+            return String(hex.suffix(64))
+        }
+        return hex
+    }
+
+    static func decryptWithKeyAndNonce(ciphertext: String, keyAndNonce: Data) throws -> String {
+        guard keyAndNonce.count >= 56 else {
+            throw CryptoError.invalidData("Key+nonce must be 56 bytes, got \(keyAndNonce.count)")
+        }
+
+        let key = keyAndNonce[0..<32]
+        let nonce = keyAndNonce[32..<56]
+        let ciphertextData = Data(hexString: ciphertext)
+        let plaintext = try XChaCha20Engine.decrypt(
+            ciphertextWithTag: ciphertextData,
+            key: Data(key),
+            nonce: Data(nonce)
+        )
+
+        guard let text = String(data: plaintext, encoding: .utf8) else {
+            throw CryptoError.invalidData("Decrypted data is not valid UTF-8")
+        }
+        return text
     }
 }

Rosetta/Core/Crypto/Poly1305Engine.swift

@@ -37,9 +37,10 @@ enum Poly1305Engine {
             var block = [UInt8](macInput[offset..<blockEnd])
             while block.count < 16 { block.append(0) }
 
-            // hibit is 1 for data blocks, 0 for length fields
-            let isDataBlock = offset < data.count + padding
-            let bit: UInt64 = isDataBlock ? (1 << 24) : 0
+            // Poly1305 appends a 1-bit to each complete 16-byte block.
+            // In AEAD mode we process a fully padded stream
+            // (ciphertext + pad16 + aadLen + ctLen), so every block here is complete.
+            let bit: UInt64 = 1 << 24
 
             let n = toLimbs26(block)
             accumulator[0] = accumulator[0] &+ n[0]

Rosetta/Core/Data/Models/ChatMessage.swift

@@ -0,0 +1,21 @@
+import Foundation
+
+/// Single message inside a direct chat dialog.
+struct ChatMessage: Identifiable, Codable, Sendable {
+    let id: String
+    var fromPublicKey: String
+    var toPublicKey: String
+    var text: String
+    var timestamp: Int64
+    var deliveryStatus: DeliveryStatus
+    var isRead: Bool
+    var attachments: [MessageAttachment]
+
+    func isFromMe(myPublicKey: String) -> Bool {
+        fromPublicKey == myPublicKey
+    }
+
+    var date: Date {
+        Date(timeIntervalSince1970: Double(timestamp) / 1000.0)
+    }
+}

Rosetta/Core/Data/Models/RecentSearch.swift

@@ -0,0 +1,8 @@
+import Foundation
+
+struct RecentSearch: Codable, Equatable, Sendable {
+    let publicKey: String
+    var title: String
+    var username: String
+    var lastSeenText: String
+}

Rosetta/Core/Data/Repositories/ChatPersistenceStore.swift

@@ -0,0 +1,59 @@
+import Foundation
+
+actor ChatPersistenceStore {
+    static let shared = ChatPersistenceStore()
+
+    private let encoder = JSONEncoder()
+    private let decoder = JSONDecoder()
+    private let rootDirectory: URL
+
+    private init() {
+        let fileManager = FileManager.default
+        let baseURL = fileManager.urls(for: .applicationSupportDirectory, in: .userDomainMask).first
+            ?? fileManager.urls(for: .documentDirectory, in: .userDomainMask).first
+            ?? URL(fileURLWithPath: NSTemporaryDirectory(), isDirectory: true)
+
+        let directory = baseURL
+            .appendingPathComponent("Rosetta", isDirectory: true)
+            .appendingPathComponent("ChatState", isDirectory: true)
+
+        try? fileManager.createDirectory(at: directory, withIntermediateDirectories: true)
+        rootDirectory = directory
+    }
+
+    func load<T: Decodable>(_ type: T.Type, fileName: String) -> T? {
+        let fileURL = rootDirectory.appendingPathComponent(fileName, isDirectory: false)
+        guard FileManager.default.fileExists(atPath: fileURL.path) else { return nil }
+        guard let data = try? Data(contentsOf: fileURL) else { return nil }
+        return try? decoder.decode(type, from: data)
+    }
+
+    func save<T: Encodable>(_ value: T, fileName: String) {
+        let fileURL = rootDirectory.appendingPathComponent(fileName, isDirectory: false)
+        guard let data = try? encoder.encode(value) else { return }
+        try? data.write(to: fileURL, options: [.atomic])
+    }
+
+    func remove(fileName: String) {
+        let fileURL = rootDirectory.appendingPathComponent(fileName, isDirectory: false)
+        try? FileManager.default.removeItem(at: fileURL)
+    }
+
+    nonisolated static func accountScopedFileName(prefix: String, accountPublicKey: String) -> String {
+        "\(prefix)_\(normalizedAccountKey(accountPublicKey)).json"
+    }
+
+    private nonisolated static func normalizedAccountKey(_ accountPublicKey: String) -> String {
+        let trimmed = accountPublicKey.trimmingCharacters(in: .whitespacesAndNewlines)
+        if trimmed.isEmpty {
+            return "anonymous"
+        }
+        let scalars = trimmed.unicodeScalars.map { scalar -> Character in
+            if CharacterSet.alphanumerics.contains(scalar) {
+                return Character(scalar)
+            }
+            return "_"
+        }
+        return String(scalars)
+    }
+}

Rosetta/Core/Data/Repositories/DialogRepository.swift

@@ -1,7 +1,7 @@
 import Foundation
 import Observation
 
-/// In-memory dialog store, updated from incoming protocol packets.
+/// Account-scoped dialog store with disk persistence.
 @Observable
 @MainActor
 final class DialogRepository {
@@ -9,6 +9,8 @@ final class DialogRepository {
     static let shared = DialogRepository()
 
     private(set) var dialogs: [String: Dialog] = [:]
+    private var currentAccount: String = ""
+    private var persistTask: Task<Void, Never>?
 
     var sortedDialogs: [Dialog] {
         Array(dialogs.values).sorted {
@@ -19,14 +21,61 @@ final class DialogRepository {
 
     private init() {}
 
+    func bootstrap(accountPublicKey: String) async {
+        let account = accountPublicKey.trimmingCharacters(in: .whitespacesAndNewlines)
+        guard !account.isEmpty else {
+            reset()
+            return
+        }
+
+        if currentAccount == account, !dialogs.isEmpty {
+            return
+        }
+
+        currentAccount = account
+        persistTask?.cancel()
+        persistTask = nil
+
+        let fileName = Self.dialogsFileName(for: account)
+        let stored = await ChatPersistenceStore.shared.load([Dialog].self, fileName: fileName) ?? []
+        dialogs = Dictionary(
+            uniqueKeysWithValues: stored
+                .filter { $0.account == account }
+                .map { ($0.opponentKey, $0) }
+        )
+    }
+
+    func reset(clearPersisted: Bool = false) {
+        persistTask?.cancel()
+        persistTask = nil
+        dialogs.removeAll()
+
+        guard !currentAccount.isEmpty else { return }
+        let accountToReset = currentAccount
+        currentAccount = ""
+
+        guard clearPersisted else { return }
+        let fileName = Self.dialogsFileName(for: accountToReset)
+        Task(priority: .utility) {
+            await ChatPersistenceStore.shared.remove(fileName: fileName)
+        }
+    }
+
     // MARK: - Updates
 
     func upsertDialog(_ dialog: Dialog) {
+        if currentAccount.isEmpty {
+            currentAccount = dialog.account
+        }
         dialogs[dialog.opponentKey] = dialog
+        schedulePersist()
     }
 
     /// Creates or updates a dialog from an incoming message packet.
     func updateFromMessage(_ packet: PacketMessage, myPublicKey: String, decryptedText: String) {
+        if currentAccount.isEmpty {
+            currentAccount = myPublicKey
+        }
         let fromMe = packet.fromPublicKey == myPublicKey
         let opponentKey = fromMe ? packet.toPublicKey : packet.fromPublicKey
 
@@ -50,7 +99,7 @@ final class DialogRepository {
         )
 
         dialog.lastMessage = decryptedText
-        dialog.lastMessageTimestamp = Int64(packet.timestamp)
+        dialog.lastMessageTimestamp = normalizeTimestamp(packet.timestamp)
         dialog.lastMessageFromMe = fromMe
         dialog.lastMessageDelivered = fromMe ? .waiting : .delivered
 
@@ -61,6 +110,50 @@ final class DialogRepository {
         }
 
         dialogs[opponentKey] = dialog
+        schedulePersist()
+    }
+
+    func ensureDialog(
+        opponentKey: String,
+        title: String,
+        username: String,
+        verified: Int = 0,
+        myPublicKey: String
+    ) {
+        if var existing = dialogs[opponentKey] {
+            if !title.isEmpty {
+                existing.opponentTitle = title
+            }
+            if !username.isEmpty {
+                existing.opponentUsername = username
+            }
+            if verified > existing.verified {
+                existing.verified = verified
+            }
+            dialogs[opponentKey] = existing
+            schedulePersist()
+            return
+        }
+
+        dialogs[opponentKey] = Dialog(
+            id: opponentKey,
+            account: myPublicKey,
+            opponentKey: opponentKey,
+            opponentTitle: title,
+            opponentUsername: username,
+            lastMessage: "",
+            lastMessageTimestamp: 0,
+            unreadCount: 0,
+            isOnline: false,
+            lastSeen: 0,
+            verified: verified,
+            iHaveSent: false,
+            isPinned: false,
+            isMuted: false,
+            lastMessageFromMe: false,
+            lastMessageDelivered: .waiting
+        )
+        schedulePersist()
     }
 
     func updateOnlineState(publicKey: String, isOnline: Bool) {
@@ -70,12 +163,24 @@ final class DialogRepository {
             dialog.lastSeen = Int64(Date().timeIntervalSince1970 * 1000)
         }
         dialogs[publicKey] = dialog
+        schedulePersist()
     }
 
     func updateDeliveryStatus(messageId: String, opponentKey: String, status: DeliveryStatus) {
         guard var dialog = dialogs[opponentKey] else { return }
+        let current = dialog.lastMessageDelivered
+        if current == .read, status == .delivered {
+            return
+        }
+        if current == .read, status == .waiting {
+            return
+        }
+        if current == .delivered, status == .waiting {
+            return
+        }
         dialog.lastMessageDelivered = status
         dialogs[opponentKey] = dialog
+        schedulePersist()
     }
 
     func updateUserInfo(publicKey: String, title: String, username: String, verified: Int = 0) {
@@ -84,27 +189,63 @@ final class DialogRepository {
         if !username.isEmpty { dialog.opponentUsername = username }
         if verified > 0 { dialog.verified = max(dialog.verified, verified) }
         dialogs[publicKey] = dialog
+        schedulePersist()
     }
 
     func markAsRead(opponentKey: String) {
         guard var dialog = dialogs[opponentKey] else { return }
+        guard dialog.unreadCount > 0 else { return }
         dialog.unreadCount = 0
         dialogs[opponentKey] = dialog
+        schedulePersist()
+    }
+
+    func markOutgoingAsRead(opponentKey: String) {
+        guard var dialog = dialogs[opponentKey] else { return }
+        if dialog.lastMessageFromMe {
+            dialog.lastMessageDelivered = .read
+        }
+        dialogs[opponentKey] = dialog
+        schedulePersist()
     }
 
     func deleteDialog(opponentKey: String) {
         dialogs.removeValue(forKey: opponentKey)
+        schedulePersist()
     }
 
     func togglePin(opponentKey: String) {
         guard var dialog = dialogs[opponentKey] else { return }
         dialog.isPinned.toggle()
         dialogs[opponentKey] = dialog
+        schedulePersist()
     }
 
     func toggleMute(opponentKey: String) {
         guard var dialog = dialogs[opponentKey] else { return }
         dialog.isMuted.toggle()
         dialogs[opponentKey] = dialog
+        schedulePersist()
+    }
+
+    private func normalizeTimestamp(_ raw: Int64) -> Int64 {
+        raw < 1_000_000_000_000 ? raw * 1000 : raw
+    }
+
+    private func schedulePersist() {
+        guard !currentAccount.isEmpty else { return }
+
+        let snapshot = Array(dialogs.values)
+        let fileName = Self.dialogsFileName(for: currentAccount)
+        persistTask?.cancel()
+        persistTask = Task(priority: .utility) {
+            try? await Task.sleep(for: .milliseconds(180))
+            guard !Task.isCancelled else { return }
+            await ChatPersistenceStore.shared.save(snapshot, fileName: fileName)
+        }
+    }
+
+    private static func dialogsFileName(for accountPublicKey: String) -> String {
+        ChatPersistenceStore.accountScopedFileName(prefix: "dialogs", accountPublicKey: accountPublicKey)
     }
 }

Rosetta/Core/Data/Repositories/MessageRepository.swift

@@ -0,0 +1,317 @@
+import Foundation
+import Combine
+
+/// Account-scoped message store with disk persistence.
+@MainActor
+final class MessageRepository: ObservableObject {
+    static let shared = MessageRepository()
+    // Android keeps full history in DB; keep a much larger in-memory cap to avoid visible message loss.
+    private let maxMessagesPerDialog = 5_000
+
+    @Published private var messagesByDialog: [String: [ChatMessage]] = [:]
+    @Published private var typingDialogs: Set<String> = []
+
+    private var activeDialogs: Set<String> = []
+    private var messageToDialog: [String: String] = [:]
+    private var typingResetTasks: [String: Task<Void, Never>] = [:]
+    private var persistTask: Task<Void, Never>?
+    private var currentAccount: String = ""
+
+    private init() {}
+
+    func bootstrap(accountPublicKey: String) async {
+        let account = accountPublicKey.trimmingCharacters(in: .whitespacesAndNewlines)
+        guard !account.isEmpty else {
+            reset()
+            return
+        }
+
+        if currentAccount == account, !messagesByDialog.isEmpty {
+            return
+        }
+
+        currentAccount = account
+        persistTask?.cancel()
+        persistTask = nil
+        activeDialogs.removeAll()
+        typingDialogs.removeAll()
+        for task in typingResetTasks.values {
+            task.cancel()
+        }
+        typingResetTasks.removeAll()
+        messageToDialog.removeAll()
+
+        let fileName = Self.messagesFileName(for: account)
+        let stored = await ChatPersistenceStore.shared.load([String: [ChatMessage]].self, fileName: fileName) ?? [:]
+        var restored: [String: [ChatMessage]] = [:]
+        for (dialogKey, list) in stored {
+            var sorted = list.sorted {
+                if $0.timestamp != $1.timestamp {
+                    return $0.timestamp < $1.timestamp
+                }
+                return $0.id < $1.id
+            }
+            if sorted.count > maxMessagesPerDialog {
+                sorted = Array(sorted.suffix(maxMessagesPerDialog))
+            }
+            restored[dialogKey] = sorted
+            for message in sorted {
+                messageToDialog[message.id] = dialogKey
+            }
+        }
+        messagesByDialog = restored
+    }
+
+    // MARK: - Dialog State
+
+    func messages(for dialogKey: String) -> [ChatMessage] {
+        messagesByDialog[dialogKey] ?? []
+    }
+
+    func dialogKey(forMessageId messageId: String) -> String? {
+        messageToDialog[messageId]
+    }
+
+    func hasMessage(_ messageId: String) -> Bool {
+        messageToDialog[messageId] != nil
+    }
+
+    func isLatestMessage(_ messageId: String, in dialogKey: String) -> Bool {
+        messagesByDialog[dialogKey]?.last?.id == messageId
+    }
+
+    func isDialogActive(_ dialogKey: String) -> Bool {
+        activeDialogs.contains(dialogKey)
+    }
+
+    func setDialogActive(_ dialogKey: String, isActive: Bool) {
+        if isActive {
+            activeDialogs.insert(dialogKey)
+        } else {
+            activeDialogs.remove(dialogKey)
+            typingDialogs.remove(dialogKey)
+            typingResetTasks[dialogKey]?.cancel()
+            typingResetTasks[dialogKey] = nil
+        }
+    }
+
+    // MARK: - Message Updates
+
+    func upsertFromMessagePacket(_ packet: PacketMessage, myPublicKey: String, decryptedText: String) {
+        let fromMe = packet.fromPublicKey == myPublicKey
+        let dialogKey = fromMe ? packet.toPublicKey : packet.fromPublicKey
+        let messageId = packet.messageId.isEmpty ? UUID().uuidString : packet.messageId
+        let timestamp = normalizeTimestamp(packet.timestamp)
+        let incomingRead = !fromMe && activeDialogs.contains(dialogKey)
+
+        messageToDialog[messageId] = dialogKey
+
+        updateMessages(for: dialogKey) { messages in
+            if let existingIndex = messages.firstIndex(where: { $0.id == messageId }) {
+                messages[existingIndex].text = decryptedText
+                messages[existingIndex].timestamp = timestamp
+                messages[existingIndex].attachments = packet.attachments
+                if fromMe, messages[existingIndex].deliveryStatus == .error {
+                    messages[existingIndex].deliveryStatus = .waiting
+                }
+                if incomingRead {
+                    messages[existingIndex].isRead = true
+                }
+                return
+            }
+
+            messages.append(
+                ChatMessage(
+                    id: messageId,
+                    fromPublicKey: packet.fromPublicKey,
+                    toPublicKey: packet.toPublicKey,
+                    text: decryptedText,
+                    timestamp: timestamp,
+                    deliveryStatus: fromMe ? .waiting : .delivered,
+                    isRead: incomingRead || fromMe,
+                    attachments: packet.attachments
+                )
+            )
+        }
+    }
+
+    func updateDeliveryStatus(messageId: String, status: DeliveryStatus) {
+        guard let dialogKey = messageToDialog[messageId] else { return }
+        updateMessages(for: dialogKey) { messages in
+            guard let index = messages.firstIndex(where: { $0.id == messageId }) else { return }
+            let current = messages[index].deliveryStatus
+            if current == .read, status == .delivered {
+                return
+            }
+            if current == .read, status == .waiting {
+                return
+            }
+            if current == .delivered, status == .waiting {
+                return
+            }
+            messages[index].deliveryStatus = status
+        }
+    }
+
+    func markIncomingAsRead(opponentKey: String, myPublicKey: String) {
+        updateMessages(for: opponentKey) { messages in
+            for index in messages.indices {
+                if messages[index].fromPublicKey == opponentKey,
+                   messages[index].toPublicKey == myPublicKey
+                {
+                    messages[index].isRead = true
+                }
+            }
+        }
+    }
+
+    func markOutgoingAsRead(opponentKey: String, myPublicKey: String) {
+        updateMessages(for: opponentKey) { messages in
+            for index in messages.indices {
+                if messages[index].fromPublicKey == myPublicKey,
+                   messages[index].toPublicKey == opponentKey
+                {
+                    messages[index].deliveryStatus = .read
+                }
+            }
+        }
+    }
+
+    // MARK: - Typing
+
+    func markTyping(from opponentKey: String) {
+        typingDialogs.insert(opponentKey)
+        typingResetTasks[opponentKey]?.cancel()
+        typingResetTasks[opponentKey] = Task { @MainActor [weak self] in
+            try? await Task.sleep(for: .seconds(3))
+            guard let self, !Task.isCancelled else { return }
+            self.typingDialogs.remove(opponentKey)
+            self.typingResetTasks[opponentKey] = nil
+        }
+    }
+
+    func isTyping(dialogKey: String) -> Bool {
+        typingDialogs.contains(dialogKey)
+    }
+
+    func deleteDialog(_ dialogKey: String) {
+        guard messagesByDialog.removeValue(forKey: dialogKey) != nil else { return }
+        activeDialogs.remove(dialogKey)
+        typingDialogs.remove(dialogKey)
+        typingResetTasks[dialogKey]?.cancel()
+        typingResetTasks[dialogKey] = nil
+        messageToDialog = messageToDialog.filter { $0.value != dialogKey }
+        schedulePersist()
+    }
+
+    /// Android parity: resolve outgoing WAITING messages after reconnect.
+    /// Returns messages safe to retry and ids that expired (must be marked as error in dialog state).
+    func resolveWaitingOutgoingMessages(
+        myPublicKey: String,
+        nowMs: Int64,
+        maxAgeMs: Int64
+    ) -> (retryable: [ChatMessage], expired: [(messageId: String, dialogKey: String)]) {
+        var retryable: [ChatMessage] = []
+        var expired: [(messageId: String, dialogKey: String)] = []
+        var hasMutations = false
+        let cutoff = nowMs - maxAgeMs
+
+        for (dialogKey, currentMessages) in messagesByDialog {
+            var messages = currentMessages
+            var mutated = false
+
+            for index in messages.indices {
+                let message = messages[index]
+                guard message.fromPublicKey == myPublicKey else { continue }
+                guard message.deliveryStatus == .waiting else { continue }
+
+                if message.timestamp < cutoff {
+                    messages[index].deliveryStatus = .error
+                    expired.append((messageId: message.id, dialogKey: dialogKey))
+                    mutated = true
+                } else {
+                    retryable.append(message)
+                }
+            }
+
+            if mutated {
+                messagesByDialog[dialogKey] = messages
+                hasMutations = true
+            }
+        }
+
+        if hasMutations {
+            schedulePersist()
+        }
+
+        return (retryable: retryable, expired: expired)
+    }
+
+    func reset(clearPersisted: Bool = false) {
+        persistTask?.cancel()
+        persistTask = nil
+        for task in typingResetTasks.values {
+            task.cancel()
+        }
+        typingResetTasks.removeAll()
+        messagesByDialog.removeAll()
+        typingDialogs.removeAll()
+        activeDialogs.removeAll()
+        messageToDialog.removeAll()
+
+        guard !currentAccount.isEmpty else { return }
+        let accountToReset = currentAccount
+        currentAccount = ""
+
+        guard clearPersisted else { return }
+        let fileName = Self.messagesFileName(for: accountToReset)
+        Task(priority: .utility) {
+            await ChatPersistenceStore.shared.remove(fileName: fileName)
+        }
+    }
+
+    // MARK: - Private
+
+    private func updateMessages(for dialogKey: String, mutate: (inout [ChatMessage]) -> Void) {
+        var messages = messagesByDialog[dialogKey] ?? []
+        mutate(&messages)
+        messages.sort {
+            if $0.timestamp != $1.timestamp {
+                return $0.timestamp < $1.timestamp
+            }
+            return $0.id < $1.id
+        }
+        if messages.count > maxMessagesPerDialog {
+            let overflow = messages.count - maxMessagesPerDialog
+            let dropped = messages.prefix(overflow)
+            for message in dropped {
+                messageToDialog.removeValue(forKey: message.id)
+            }
+            messages.removeFirst(overflow)
+        }
+        messagesByDialog[dialogKey] = messages
+        schedulePersist()
+    }
+
+    private func normalizeTimestamp(_ raw: Int64) -> Int64 {
+        // Some peers still send seconds, while Android path uses milliseconds.
+        raw < 1_000_000_000_000 ? raw * 1000 : raw
+    }
+
+    private func schedulePersist() {
+        guard !currentAccount.isEmpty else { return }
+
+        let snapshot = messagesByDialog
+        let fileName = Self.messagesFileName(for: currentAccount)
+        persistTask?.cancel()
+        persistTask = Task(priority: .utility) {
+            try? await Task.sleep(for: .milliseconds(220))
+            guard !Task.isCancelled else { return }
+            await ChatPersistenceStore.shared.save(snapshot, fileName: fileName)
+        }
+    }
+
+    private static func messagesFileName(for accountPublicKey: String) -> String {
+        ChatPersistenceStore.accountScopedFileName(prefix: "messages", accountPublicKey: accountPublicKey)
+    }
+}

Rosetta/Core/Data/Repositories/RecentSearchesRepository.swift

@@ -0,0 +1,97 @@
+import Combine
+import Foundation
+
+@MainActor
+final class RecentSearchesRepository: ObservableObject {
+    static let shared = RecentSearchesRepository()
+
+    @Published private(set) var recentSearches: [RecentSearch] = []
+
+    private static let maxRecent = 15
+    private static let legacyKey = "rosetta_recent_searches"
+    private var currentAccount: String = ""
+
+    private init() {}
+
+    func setAccount(_ accountPublicKey: String) {
+        let account = accountPublicKey.trimmingCharacters(in: .whitespacesAndNewlines)
+        guard account != currentAccount else { return }
+        currentAccount = account
+        load()
+    }
+
+    func clearSession() {
+        currentAccount = ""
+        recentSearches = []
+    }
+
+    func add(_ user: SearchUser) {
+        let recent = RecentSearch(
+            publicKey: user.publicKey,
+            title: user.title,
+            username: user.username,
+            lastSeenText: user.online == 1 ? "online" : "last seen recently"
+        )
+        add(recent)
+    }
+
+    func add(_ recent: RecentSearch) {
+        guard !currentAccount.isEmpty else { return }
+        recentSearches.removeAll { $0.publicKey == recent.publicKey }
+        recentSearches.insert(recent, at: 0)
+        if recentSearches.count > Self.maxRecent {
+            recentSearches = Array(recentSearches.prefix(Self.maxRecent))
+        }
+        persist()
+    }
+
+    func remove(publicKey: String) {
+        guard !currentAccount.isEmpty else { return }
+        recentSearches.removeAll { $0.publicKey == publicKey }
+        persist()
+    }
+
+    func clearAll() {
+        guard !currentAccount.isEmpty else {
+            recentSearches = []
+            return
+        }
+        recentSearches = []
+        UserDefaults.standard.removeObject(forKey: scopedKey)
+    }
+
+    private var scopedKey: String {
+        "rosetta_recent_searches_\(currentAccount)"
+    }
+
+    private func load() {
+        guard !currentAccount.isEmpty else {
+            recentSearches = []
+            return
+        }
+
+        if let data = UserDefaults.standard.data(forKey: scopedKey),
+           let list = try? JSONDecoder().decode([RecentSearch].self, from: data)
+        {
+            recentSearches = Array(list.prefix(Self.maxRecent))
+            return
+        }
+
+        if let data = UserDefaults.standard.data(forKey: Self.legacyKey),
+           let list = try? JSONDecoder().decode([RecentSearch].self, from: data)
+        {
+            recentSearches = Array(list.prefix(Self.maxRecent))
+            persist()
+            UserDefaults.standard.removeObject(forKey: Self.legacyKey)
+            return
+        }
+
+        recentSearches = []
+    }
+
+    private func persist() {
+        guard !currentAccount.isEmpty else { return }
+        guard let data = try? JSONEncoder().encode(recentSearches) else { return }
+        UserDefaults.standard.set(data, forKey: scopedKey)
+    }
+}

Rosetta/Core/Network/Protocol/Packets/Packet.swift

@@ -22,6 +22,7 @@ enum PacketRegistry {
         0x07: { PacketRead() },
         0x08: { PacketDelivery() },
         0x0B: { PacketTyping() },
+        0x17: { PacketDeviceList() },
         0x19: { PacketSync() },
     ]
 

Rosetta/Core/Network/Protocol/Packets/PacketDeviceList.swift

@@ -0,0 +1,55 @@
+import Foundation
+
+enum DeviceState: Int {
+    case online = 0
+    case offline = 1
+}
+
+enum DeviceVerifyState: Int {
+    case verified = 0
+    case notVerified = 1
+}
+
+struct DeviceEntry {
+    var deviceId: String
+    var deviceName: String
+    var deviceOs: String
+    var deviceStatus: DeviceState
+    var deviceVerify: DeviceVerifyState
+}
+
+/// Device list packet (0x17).
+struct PacketDeviceList: Packet {
+    static let packetId = 0x17
+
+    var devices: [DeviceEntry] = []
+
+    func write(to stream: Stream) {
+        stream.writeInt16(devices.count)
+        for device in devices {
+            stream.writeString(device.deviceId)
+            stream.writeString(device.deviceName)
+            stream.writeString(device.deviceOs)
+            stream.writeInt8(device.deviceStatus.rawValue)
+            stream.writeInt8(device.deviceVerify.rawValue)
+        }
+    }
+
+    mutating func read(from stream: Stream) {
+        let count = stream.readInt16()
+        var parsed: [DeviceEntry] = []
+        parsed.reserveCapacity(max(0, count))
+        for _ in 0..<count {
+            parsed.append(
+                DeviceEntry(
+                    deviceId: stream.readString(),
+                    deviceName: stream.readString(),
+                    deviceOs: stream.readString(),
+                    deviceStatus: DeviceState(rawValue: stream.readInt8()) ?? .offline,
+                    deviceVerify: DeviceVerifyState(rawValue: stream.readInt8()) ?? .verified
+                )
+            )
+        }
+        devices = parsed
+    }
+}

Rosetta/Core/Network/Protocol/Packets/PacketMessage.swift

@@ -8,7 +8,7 @@ struct PacketMessage: Packet {
     var toPublicKey: String = ""
     var content: String = ""           // XChaCha20-Poly1305 encrypted (hex)
     var chachaKey: String = ""         // ECDH-encrypted key+nonce
-    var timestamp: Int32 = 0
+    var timestamp: Int64 = 0
     var privateKey: String = ""        // Hash for server auth
     var messageId: String = ""
     var attachments: [MessageAttachment] = []
@@ -20,7 +20,7 @@ struct PacketMessage: Packet {
         stream.writeString(toPublicKey)
         stream.writeString(content)
         stream.writeString(chachaKey)
-        stream.writeInt32(Int(timestamp))
+        stream.writeInt64(timestamp)
         stream.writeString(privateKey)
         stream.writeString(messageId)
         stream.writeInt8(attachments.count)
@@ -31,7 +31,7 @@ struct PacketMessage: Packet {
             stream.writeString(attachment.blob)
             stream.writeInt8(attachment.type.rawValue)
         }
-        // No aesChachaKey — Android doesn't send it
+        stream.writeString(aesChachaKey)
     }
 
     mutating func read(from stream: Stream) {
@@ -39,7 +39,7 @@ struct PacketMessage: Packet {
         toPublicKey = stream.readString()
         content = stream.readString()
         chachaKey = stream.readString()
-        timestamp = Int32(stream.readInt32())
+        timestamp = stream.readInt64()
         privateKey = stream.readString()
         messageId = stream.readString()
 
@@ -54,6 +54,6 @@ struct PacketMessage: Packet {
             ))
         }
         attachments = list
-        // No aesChachaKey — Android doesn't read it
+        aesChachaKey = stream.readString()
     }
 }

Rosetta/Core/Network/Protocol/ProtocolManager.swift

@@ -43,9 +43,13 @@ final class ProtocolManager: @unchecked Sendable {
 
     private let client = WebSocketClient()
     private var packetQueue: [any Packet] = []
+    private var queuedPacketKeys: Set<String> = []
     private var handshakeComplete = false
     private var heartbeatTask: Task<Void, Never>?
     private var handshakeTimeoutTask: Task<Void, Never>?
+    private let searchHandlersLock = NSLock()
+    private let packetQueueLock = NSLock()
+    private var searchResultHandlers: [UUID: (PacketSearch) -> Void] = [:]
 
     // Saved credentials for auto-reconnect
     private var savedPublicKey: String?
@@ -88,14 +92,30 @@ final class ProtocolManager: @unchecked Sendable {
     // MARK: - Sending
 
     func sendPacket(_ packet: any Packet) {
-        if !handshakeComplete && !(packet is PacketHandshake) {
-            Self.logger.info("Queueing packet \(type(of: packet).packetId)")
-            packetQueue.append(packet)
+        if (!handshakeComplete && !(packet is PacketHandshake)) || !client.isConnected {
+            enqueuePacket(packet)
             return
         }
         sendPacketDirect(packet)
     }
 
+    // MARK: - Search Handlers (Android-like wait/unwait)
+
+    @discardableResult
+    func addSearchResultHandler(_ handler: @escaping (PacketSearch) -> Void) -> UUID {
+        let id = UUID()
+        searchHandlersLock.lock()
+        searchResultHandlers[id] = handler
+        searchHandlersLock.unlock()
+        return id
+    }
+
+    func removeSearchResultHandler(_ id: UUID) {
+        searchHandlersLock.lock()
+        searchResultHandlers.removeValue(forKey: id)
+        searchHandlersLock.unlock()
+    }
+
     // MARK: - Private Setup
 
     private func setupClientCallbacks() {
@@ -212,6 +232,7 @@ final class ProtocolManager: @unchecked Sendable {
             if let p = packet as? PacketSearch {
                 Self.logger.debug("📥 Search result: \(p.users.count) users, callback=\(self.onSearchResult != nil)")
                 onSearchResult?(p)
+                notifySearchResultHandlers(p)
             }
         case 0x05:
             if let p = packet as? PacketOnlineState {
@@ -242,14 +263,23 @@ final class ProtocolManager: @unchecked Sendable {
         }
     }
 
+    private func notifySearchResultHandlers(_ packet: PacketSearch) {
+        searchHandlersLock.lock()
+        let handlers = Array(searchResultHandlers.values)
+        searchHandlersLock.unlock()
+
+        for handler in handlers {
+            handler(packet)
+        }
+    }
+
     private func handleHandshakeResponse(_ packet: PacketHandshake) {
-        // Set handshakeComplete BEFORE cancelling timeout to prevent race
-        handshakeComplete = true
         handshakeTimeoutTask?.cancel()
         handshakeTimeoutTask = nil
 
         switch packet.handshakeState {
         case .completed:
+            handshakeComplete = true
             Self.logger.info("Handshake completed. Protocol v\(packet.protocolVersion), heartbeat \(packet.heartbeatInterval)s")
 
             Task { @MainActor in
@@ -261,7 +291,9 @@ final class ProtocolManager: @unchecked Sendable {
             onHandshakeCompleted?(packet)
 
         case .needDeviceVerification:
+            handshakeComplete = false
             Self.logger.info("Server requires device verification")
+            clearPacketQueue()
             startHeartbeat(interval: packet.heartbeatInterval)
         }
     }
@@ -289,15 +321,71 @@ final class ProtocolManager: @unchecked Sendable {
     private func sendPacketDirect(_ packet: any Packet) {
         let data = PacketRegistry.encode(packet)
         Self.logger.info("Sending packet 0x\(String(type(of: packet).packetId, radix: 16)) (\(data.count) bytes)")
-        client.send(data)
+        if !client.send(data, onFailure: { [weak self] _ in
+            guard let self else { return }
+            Self.logger.warning("Send failed, re-queueing packet 0x\(String(type(of: packet).packetId, radix: 16))")
+            self.enqueuePacket(packet)
+        }) {
+            Self.logger.warning("WebSocket unavailable, re-queueing packet 0x\(String(type(of: packet).packetId, radix: 16))")
+            enqueuePacket(packet)
+        }
     }
 
     private func flushPacketQueue() {
-        Self.logger.info("Flushing \(self.packetQueue.count) queued packets")
-        let packets = packetQueue
-        packetQueue.removeAll()
+        let packets = drainPacketQueue()
+        Self.logger.info("Flushing \(packets.count) queued packets")
         for packet in packets {
             sendPacketDirect(packet)
         }
     }
+
+    private func enqueuePacket(_ packet: any Packet) {
+        packetQueueLock.lock()
+        if let key = packetQueueKey(packet), queuedPacketKeys.contains(key) {
+            packetQueueLock.unlock()
+            return
+        }
+        packetQueue.append(packet)
+        if let key = packetQueueKey(packet) {
+            queuedPacketKeys.insert(key)
+        }
+        let count = packetQueue.count
+        packetQueueLock.unlock()
+        Self.logger.info("Queueing packet 0x\(String(type(of: packet).packetId, radix: 16)) (queue=\(count))")
+    }
+
+    private func drainPacketQueue() -> [any Packet] {
+        packetQueueLock.lock()
+        let packets = packetQueue
+        packetQueue.removeAll()
+        queuedPacketKeys.removeAll()
+        packetQueueLock.unlock()
+        return packets
+    }
+
+    private func clearPacketQueue() {
+        packetQueueLock.lock()
+        packetQueue.removeAll()
+        queuedPacketKeys.removeAll()
+        packetQueueLock.unlock()
+    }
+
+    private func packetQueueKey(_ packet: any Packet) -> String? {
+        switch packet {
+        case let message as PacketMessage:
+            return message.messageId.isEmpty ? nil : "0x06:\(message.messageId)"
+        case let delivery as PacketDelivery:
+            return delivery.messageId.isEmpty ? nil : "0x08:\(delivery.toPublicKey):\(delivery.messageId)"
+        case let read as PacketRead:
+            guard !read.fromPublicKey.isEmpty, !read.toPublicKey.isEmpty else { return nil }
+            return "0x07:\(read.fromPublicKey):\(read.toPublicKey)"
+        case let typing as PacketTyping:
+            guard !typing.fromPublicKey.isEmpty, !typing.toPublicKey.isEmpty else { return nil }
+            return "0x0b:\(typing.fromPublicKey):\(typing.toPublicKey)"
+        case let sync as PacketSync:
+            return "0x19:\(sync.status.rawValue):\(sync.timestamp)"
+        default:
+            return nil
+        }
+    }
 }

Rosetta/Core/Network/Protocol/Stream.swift

@@ -127,25 +127,27 @@ final class Stream: @unchecked Sendable {
     // MARK: - String (Int32 length + UTF-16 code units)
 
     func writeString(_ value: String) {
-        writeInt32(value.count)
-        for char in value {
-            for scalar in char.utf16 {
-                writeInt16(Int(scalar))
-            }
+        let utf16Units = Array(value.utf16)
+        writeInt32(utf16Units.count)
+        for codeUnit in utf16Units {
+            writeInt16(Int(codeUnit))
         }
     }
 
     func readString() -> String {
         let length = readInt32()
-        var result = ""
-        result.reserveCapacity(length)
-        for _ in 0..<length {
-            let code = readInt16()
-            if let scalar = Unicode.Scalar(code) {
-                result.append(Character(scalar))
-            }
+        let bitsAvailable = bytes.count * 8 - readPointer
+        let bytesAvailable = max(bitsAvailable / 8, 0)
+        if length < 0 || (length * 2) > bytesAvailable {
+            return ""
         }
-        return result
+
+        var codeUnits = [UInt16]()
+        codeUnits.reserveCapacity(length)
+        for _ in 0..<length {
+            codeUnits.append(UInt16(truncatingIfNeeded: readInt16()))
+        }
+        return String(decoding: codeUnits, as: UTF16.self)
     }
 
     // MARK: - Bytes (Int32 length + raw Int8s)

Rosetta/Core/Network/Protocol/WebSocketClient.swift

@@ -12,6 +12,8 @@ final class WebSocketClient: NSObject, @unchecked Sendable, URLSessionWebSocketD
     private var isManuallyClosed = false
     private var reconnectTask: Task<Void, Never>?
     private var hasNotifiedConnected = false
+    private(set) var isConnected = false
+    private var disconnectHandledForCurrentSocket = false
 
     var onConnected: (() -> Void)?
     var onDisconnected: ((Error?) -> Void)?
@@ -30,6 +32,8 @@ final class WebSocketClient: NSObject, @unchecked Sendable, URLSessionWebSocketD
         guard webSocketTask == nil else { return }
         isManuallyClosed = false
         hasNotifiedConnected = false
+        isConnected = false
+        disconnectHandledForCurrentSocket = false
 
         Self.logger.info("Connecting to \(self.url.absoluteString)")
 
@@ -47,18 +51,24 @@ final class WebSocketClient: NSObject, @unchecked Sendable, URLSessionWebSocketD
         reconnectTask = nil
         webSocketTask?.cancel(with: .goingAway, reason: nil)
         webSocketTask = nil
+        isConnected = false
     }
 
-    func send(_ data: Data) {
-        guard let task = webSocketTask else {
+    @discardableResult
+    func send(_ data: Data, onFailure: ((Error?) -> Void)? = nil) -> Bool {
+        guard isConnected, let task = webSocketTask else {
             Self.logger.warning("Cannot send: no active connection")
-            return
+            return false
         }
-        task.send(.data(data)) { error in
+        task.send(.data(data)) { [weak self] error in
+            guard let self else { return }
             if let error {
                 Self.logger.error("Send error: \(error.localizedDescription)")
+                onFailure?(error)
+                self.handleDisconnect(error: error)
             }
         }
+        return true
     }
 
     func sendText(_ text: String) {
@@ -76,11 +86,16 @@ final class WebSocketClient: NSObject, @unchecked Sendable, URLSessionWebSocketD
         Self.logger.info("WebSocket didOpen")
         guard !isManuallyClosed else { return }
         hasNotifiedConnected = true
+        isConnected = true
+        disconnectHandledForCurrentSocket = false
+        reconnectTask?.cancel()
+        reconnectTask = nil
         onConnected?()
     }
 
     nonisolated func urlSession(_ session: URLSession, webSocketTask: URLSessionWebSocketTask, didCloseWith closeCode: URLSessionWebSocketTask.CloseCode, reason: Data?) {
         Self.logger.info("WebSocket didClose: \(closeCode.rawValue)")
+        isConnected = false
         handleDisconnect(error: nil)
     }
 
@@ -114,16 +129,22 @@ final class WebSocketClient: NSObject, @unchecked Sendable, URLSessionWebSocketD
     // MARK: - Reconnection
 
     private func handleDisconnect(error: Error?) {
+        if disconnectHandledForCurrentSocket {
+            return
+        }
+        disconnectHandledForCurrentSocket = true
         webSocketTask = nil
+        isConnected = false
         onDisconnected?(error)
 
         guard !isManuallyClosed else { return }
 
-        reconnectTask?.cancel()
+        guard reconnectTask == nil else { return }
         reconnectTask = Task { [weak self] in
             Self.logger.info("Reconnecting in 5 seconds...")
             try? await Task.sleep(nanoseconds: 5_000_000_000)
             guard let self, !isManuallyClosed, !Task.isCancelled else { return }
+            self.reconnectTask = nil
             self.connect()
         }
     }

Rosetta/Core/Services/SessionManager.swift

@@ -20,6 +20,22 @@ final class SessionManager {
     private(set) var privateKeyHash: String?
     /// Hex-encoded raw private key, kept in memory for message decryption.
     private(set) var privateKeyHex: String?
+    private var lastTypingSentAt: [String: Int64] = [:]
+    private var syncBatchInProgress = false
+    private var syncRequestInFlight = false
+    private var stalledSyncBatchCount = 0
+    private let maxStalledSyncBatches = 12
+    private var latestSyncBatchMessageTimestamp: Int64 = 0
+    private var pendingIncomingMessages: [PacketMessage] = []
+    private var isProcessingIncomingMessages = false
+    private var pendingReadReceiptKeys: Set<String> = []
+    private var lastReadReceiptSentAt: [String: Int64] = [:]
+    private var requestedUserInfoKeys: Set<String> = []
+    private var pendingOutgoingRetryTasks: [String: Task<Void, Never>] = [:]
+    private var pendingOutgoingPackets: [String: PacketMessage] = [:]
+    private var pendingOutgoingAttempts: [String: Int] = [:]
+    private let maxOutgoingRetryAttempts = 3
+    private let maxOutgoingWaitingLifetimeMs: Int64 = 80_000
 
     private init() {
         setupProtocolCallbacks()
@@ -45,6 +61,11 @@ final class SessionManager {
         displayName = account.displayName ?? ""
         username = account.username ?? ""
 
+        // Warm local state immediately, then let network sync reconcile updates.
+        await DialogRepository.shared.bootstrap(accountPublicKey: account.publicKey)
+        await MessageRepository.shared.bootstrap(accountPublicKey: account.publicKey)
+        RecentSearchesRepository.shared.setAccount(account.publicKey)
+
         // Generate private key hash for handshake
         let hash = crypto.generatePrivateKeyHash(privateKeyHex: privateKeyHex)
         privateKeyHash = hash
@@ -65,33 +86,63 @@ final class SessionManager {
             throw CryptoError.decryptionFailed
         }
 
-        let messageId = UUID().uuidString
-        let timestamp = Int32(Date().timeIntervalSince1970)
-
-        // Encrypt the message
-        let encrypted = try MessageCrypto.encryptOutgoing(
-            plaintext: text,
-            recipientPublicKeyHex: toPublicKey,
-            senderPrivateKeyHex: privKey
+        let messageId = UUID().uuidString.replacingOccurrences(of: "-", with: "").lowercased()
+        let timestamp = Int64(Date().timeIntervalSince1970 * 1000)
+        let packet = try makeOutgoingPacket(
+            text: text,
+            toPublicKey: toPublicKey,
+            messageId: messageId,
+            timestamp: timestamp,
+            privateKeyHex: privKey,
+            privateKeyHash: hash
         )
 
-        // Build packet
-        var packet = PacketMessage()
-        packet.fromPublicKey = currentPublicKey
-        packet.toPublicKey = toPublicKey
-        packet.content = encrypted.content
-        packet.chachaKey = encrypted.chachaKey
-        packet.timestamp = timestamp
-        packet.privateKey = hash
-        packet.messageId = messageId
+        DialogRepository.shared.ensureDialog(
+            opponentKey: toPublicKey,
+            title: "",
+            username: "",
+            myPublicKey: currentPublicKey
+        )
 
         // Optimistic UI update — show message immediately as "waiting"
         DialogRepository.shared.updateFromMessage(
             packet, myPublicKey: currentPublicKey, decryptedText: text
         )
+        MessageRepository.shared.upsertFromMessagePacket(
+            packet,
+            myPublicKey: currentPublicKey,
+            decryptedText: text
+        )
 
         // Send via WebSocket
         ProtocolManager.shared.sendPacket(packet)
+        registerOutgoingRetry(for: packet)
+    }
+
+    /// Sends typing indicator with throttling (Android parity: max once per 2s per dialog).
+    func sendTypingIndicator(toPublicKey: String) {
+        guard toPublicKey != currentPublicKey,
+              let hash = privateKeyHash,
+              ProtocolManager.shared.connectionState == .authenticated
+        else { return }
+
+        let now = Int64(Date().timeIntervalSince1970 * 1000)
+        let lastSent = lastTypingSentAt[toPublicKey] ?? 0
+        if now - lastSent < 2_000 {
+            return
+        }
+        lastTypingSentAt[toPublicKey] = now
+
+        var packet = PacketTyping()
+        packet.privateKey = hash
+        packet.fromPublicKey = currentPublicKey
+        packet.toPublicKey = toPublicKey
+        ProtocolManager.shared.sendPacket(packet)
+    }
+
+    /// Sends read receipt for direct dialog.
+    func sendReadReceipt(toPublicKey: String) {
+        sendReadReceipt(toPublicKey: toPublicKey, force: false)
     }
 
     /// Ends the session and disconnects.
@@ -99,10 +150,27 @@ final class SessionManager {
         ProtocolManager.shared.disconnect()
         privateKeyHash = nil
         privateKeyHex = nil
+        lastTypingSentAt.removeAll()
+        syncBatchInProgress = false
+        syncRequestInFlight = false
+        stalledSyncBatchCount = 0
+        latestSyncBatchMessageTimestamp = 0
+        pendingIncomingMessages.removeAll()
+        isProcessingIncomingMessages = false
+        pendingReadReceiptKeys.removeAll()
+        lastReadReceiptSentAt.removeAll()
+        requestedUserInfoKeys.removeAll()
+        pendingOutgoingRetryTasks.values.forEach { $0.cancel() }
+        pendingOutgoingRetryTasks.removeAll()
+        pendingOutgoingPackets.removeAll()
+        pendingOutgoingAttempts.removeAll()
         isAuthenticated = false
         currentPublicKey = ""
         displayName = ""
         username = ""
+        DialogRepository.shared.reset()
+        MessageRepository.shared.reset()
+        RecentSearchesRepository.shared.clearSession()
     }
 
     // MARK: - Protocol Callbacks
@@ -112,55 +180,71 @@ final class SessionManager {
 
         proto.onMessageReceived = { [weak self] packet in
             guard let self else { return }
-            Task { @MainActor in
-                let myKey = self.currentPublicKey
-                var text: String
-
-                if let privKey = self.privateKeyHex, !packet.content.isEmpty, !packet.chachaKey.isEmpty {
-                    do {
-                        text = try MessageCrypto.decryptIncoming(
-                            ciphertext: packet.content,
-                            encryptedKey: packet.chachaKey,
-                            myPrivateKeyHex: privKey
-                        )
-                    } catch {
-                        Self.logger.error("Message decryption failed: \(error.localizedDescription)")
-                        text = "(decryption failed)"
-                    }
-                } else {
-                    text = packet.content.isEmpty ? "" : "(encrypted)"
-                }
-
-                DialogRepository.shared.updateFromMessage(
-                    packet, myPublicKey: myKey, decryptedText: text
-                )
-
-                // Request user info for unknown opponents
-                let fromMe = packet.fromPublicKey == myKey
-                let opponentKey = fromMe ? packet.toPublicKey : packet.fromPublicKey
-                let dialog = DialogRepository.shared.dialogs[opponentKey]
-                if dialog?.opponentTitle.isEmpty == true, let hash = self.privateKeyHash {
-                    var searchPacket = PacketSearch()
-                    searchPacket.privateKey = hash
-                    searchPacket.search = opponentKey
-                    ProtocolManager.shared.sendPacket(searchPacket)
-                }
+            Task { @MainActor [weak self] in
+                self?.enqueueIncomingMessage(packet)
             }
         }
 
-        proto.onDeliveryReceived = { packet in
+        proto.onDeliveryReceived = { [weak self] packet in
             Task { @MainActor in
-                DialogRepository.shared.updateDeliveryStatus(
+                let opponentKey = MessageRepository.shared.dialogKey(forMessageId: packet.messageId)
+                    ?? packet.toPublicKey
+                if MessageRepository.shared.isLatestMessage(packet.messageId, in: opponentKey) {
+                    DialogRepository.shared.updateDeliveryStatus(
+                        messageId: packet.messageId,
+                        opponentKey: opponentKey,
+                        status: .delivered
+                    )
+                }
+                MessageRepository.shared.updateDeliveryStatus(
                     messageId: packet.messageId,
-                    opponentKey: packet.toPublicKey,
                     status: .delivered
                 )
+                self?.resolveOutgoingRetry(messageId: packet.messageId)
             }
         }
 
-        proto.onReadReceived = { packet in
+        proto.onReadReceived = { [weak self] packet in
+            guard let self else { return }
             Task { @MainActor in
-                DialogRepository.shared.markAsRead(opponentKey: packet.toPublicKey)
+                guard Self.isSupportedDirectReadPacket(packet, ownKey: self.currentPublicKey) else {
+                    Self.logger.debug(
+                        "Skipping unsupported read packet: from=\(packet.fromPublicKey), to=\(packet.toPublicKey)"
+                    )
+                    return
+                }
+
+                let fromKey = packet.fromPublicKey.trimmingCharacters(in: .whitespacesAndNewlines)
+                let toKey = packet.toPublicKey.trimmingCharacters(in: .whitespacesAndNewlines)
+                let ownKey = self.currentPublicKey
+                let isOwnReadSync = fromKey == ownKey
+                let opponentKey = isOwnReadSync ? toKey : fromKey
+                guard !opponentKey.isEmpty else { return }
+
+                if isOwnReadSync {
+                    // Android parity: read sync from another own device means
+                    // incoming messages in this dialog should become read locally.
+                    DialogRepository.shared.markAsRead(opponentKey: opponentKey)
+                    MessageRepository.shared.markIncomingAsRead(
+                        opponentKey: opponentKey,
+                        myPublicKey: ownKey
+                    )
+                    return
+                }
+
+                DialogRepository.shared.markOutgoingAsRead(opponentKey: opponentKey)
+                MessageRepository.shared.markOutgoingAsRead(
+                    opponentKey: opponentKey,
+                    myPublicKey: ownKey
+                )
+            }
+        }
+
+        proto.onTypingReceived = { [weak self] packet in
+            guard let self else { return }
+            Task { @MainActor in
+                guard packet.toPublicKey == self.currentPublicKey else { return }
+                MessageRepository.shared.markTyping(from: packet.fromPublicKey)
             }
         }
 
@@ -214,7 +298,477 @@ final class SessionManager {
                 } else {
                     Self.logger.debug("Skipping UserInfo — no profile data to send")
                 }
+
+                // Android parity: request message synchronization after authentication.
+                self.requestSynchronize()
+                self.retryWaitingOutgoingMessagesAfterReconnect()
+            }
+        }
+
+        proto.onSyncReceived = { [weak self] packet in
+            guard let self else { return }
+            Task { @MainActor in
+                self.syncRequestInFlight = false
+
+                switch packet.status {
+                case .batchStart:
+                    self.syncBatchInProgress = true
+                    self.stalledSyncBatchCount = 0
+                    self.latestSyncBatchMessageTimestamp = 0
+                    Self.logger.debug("SYNC BATCH_START")
+
+                case .batchEnd:
+                    // Desktop/Android parity: never advance sync cursor
+                    // before all inbound message tasks from this batch finish.
+                    let queueDrained = await self.waitForInboundQueueToDrain()
+                    if !queueDrained {
+                        Self.logger.warning("SYNC BATCH_END timed out waiting inbound queue; requesting next batch with local cursor")
+                    }
+
+                    let localCursor = self.loadLastSyncTimestamp()
+                    let serverCursor = self.normalizeSyncTimestamp(packet.timestamp)
+                    let batchCursor = self.latestSyncBatchMessageTimestamp
+                    let nextCursor = max(localCursor, max(serverCursor, batchCursor))
+
+                    if nextCursor > localCursor {
+                        self.saveLastSyncTimestamp(nextCursor)
+                        self.stalledSyncBatchCount = 0
+                    } else {
+                        self.stalledSyncBatchCount += 1
+                    }
+
+                    if self.stalledSyncBatchCount >= self.maxStalledSyncBatches {
+                        Self.logger.debug("SYNC stopped after stalled batches")
+                        self.syncBatchInProgress = false
+                        self.flushPendingReadReceipts()
+                        self.stalledSyncBatchCount = 0
+                        return
+                    }
+
+                    self.flushPendingReadReceipts()
+                    self.requestSynchronize(cursor: nextCursor)
+
+                case .notNeeded:
+                    self.syncBatchInProgress = false
+                    self.flushPendingReadReceipts()
+                    self.stalledSyncBatchCount = 0
+                    Self.logger.debug("SYNC NOT_NEEDED")
+                }
             }
         }
     }
+
+    private func enqueueIncomingMessage(_ packet: PacketMessage) {
+        pendingIncomingMessages.append(packet)
+        guard !isProcessingIncomingMessages else { return }
+        isProcessingIncomingMessages = true
+
+        Task { @MainActor [weak self] in
+            guard let self else { return }
+            await self.processIncomingMessagesQueue()
+        }
+    }
+
+    private func processIncomingMessagesQueue() async {
+        while !pendingIncomingMessages.isEmpty {
+            let batch = pendingIncomingMessages
+            pendingIncomingMessages.removeAll(keepingCapacity: true)
+            for packet in batch {
+                await processIncomingMessage(packet)
+                await Task.yield()
+            }
+        }
+        isProcessingIncomingMessages = false
+    }
+
+    private func processIncomingMessage(_ packet: PacketMessage) async {
+        let myKey = currentPublicKey
+        let currentPrivateKeyHex = self.privateKeyHex
+        let currentPrivateKeyHash = self.privateKeyHash
+
+        guard Self.isSupportedDirectMessagePacket(packet, ownKey: myKey) else {
+            Self.logger.debug(
+                "Skipping unsupported message packet: from=\(packet.fromPublicKey), to=\(packet.toPublicKey)"
+            )
+            return
+        }
+
+        let fromMe = packet.fromPublicKey == myKey
+        let opponentKey = fromMe ? packet.toPublicKey : packet.fromPublicKey
+        let wasKnownBefore = MessageRepository.shared.hasMessage(packet.messageId)
+
+        let decryptedText = Self.decryptIncomingMessage(
+            packet: packet,
+            myPublicKey: myKey,
+            privateKeyHex: currentPrivateKeyHex
+        )
+
+        guard let text = decryptedText else {
+            Self.logger.error(
+                "Incoming message dropped: \(packet.messageId), own=\(packet.fromPublicKey == myKey)"
+            )
+            return
+        }
+
+        DialogRepository.shared.updateFromMessage(
+            packet, myPublicKey: myKey, decryptedText: text
+        )
+        MessageRepository.shared.upsertFromMessagePacket(
+            packet,
+            myPublicKey: myKey,
+            decryptedText: text
+        )
+
+        let dialog = DialogRepository.shared.dialogs[opponentKey]
+
+        if dialog?.opponentTitle.isEmpty == true {
+            requestUserInfoIfNeeded(opponentKey: opponentKey, privateKeyHash: currentPrivateKeyHash)
+        }
+
+        if !fromMe && !wasKnownBefore {
+            var deliveryPacket = PacketDelivery()
+            deliveryPacket.toPublicKey = packet.fromPublicKey
+            deliveryPacket.messageId = packet.messageId
+            ProtocolManager.shared.sendPacket(deliveryPacket)
+        }
+
+        if MessageRepository.shared.isDialogActive(opponentKey) {
+            DialogRepository.shared.markAsRead(opponentKey: opponentKey)
+            MessageRepository.shared.markIncomingAsRead(
+                opponentKey: opponentKey,
+                myPublicKey: myKey
+            )
+            if !fromMe && !wasKnownBefore {
+                if syncBatchInProgress {
+                    pendingReadReceiptKeys.insert(opponentKey)
+                } else {
+                    sendReadReceipt(toPublicKey: opponentKey)
+                }
+            }
+        }
+
+        if syncBatchInProgress {
+            latestSyncBatchMessageTimestamp = max(
+                latestSyncBatchMessageTimestamp,
+                normalizeSyncTimestamp(packet.timestamp)
+            )
+        } else {
+            saveLastSyncTimestamp(packet.timestamp)
+        }
+    }
+
+    private func waitForInboundQueueToDrain(timeoutMs: UInt64 = 5_000) async -> Bool {
+        let started = DispatchTime.now().uptimeNanoseconds
+        let timeoutNs = timeoutMs * 1_000_000
+
+        while isProcessingIncomingMessages || !pendingIncomingMessages.isEmpty {
+            if DispatchTime.now().uptimeNanoseconds - started >= timeoutNs {
+                return false
+            }
+            try? await Task.sleep(for: .milliseconds(20))
+        }
+
+        return true
+    }
+
+    private var syncCursorKey: String {
+        "rosetta_last_sync_\(currentPublicKey)"
+    }
+
+    private func requestSynchronize(cursor: Int64? = nil) {
+        guard ProtocolManager.shared.connectionState == .authenticated else { return }
+        guard !syncRequestInFlight else { return }
+
+        syncRequestInFlight = true
+        let lastSync = normalizeSyncTimestamp(cursor ?? loadLastSyncTimestamp())
+
+        var packet = PacketSync()
+        packet.status = .notNeeded
+        packet.timestamp = lastSync
+
+        Self.logger.debug("Requesting sync with timestamp \(lastSync)")
+        ProtocolManager.shared.sendPacket(packet)
+    }
+
+    private func loadLastSyncTimestamp() -> Int64 {
+        guard !currentPublicKey.isEmpty else { return 0 }
+        return Int64(UserDefaults.standard.integer(forKey: syncCursorKey))
+    }
+
+    private func saveLastSyncTimestamp(_ raw: Int64) {
+        guard !currentPublicKey.isEmpty else { return }
+        let normalized = normalizeSyncTimestamp(raw)
+        guard normalized > 0 else { return }
+        let existing = loadLastSyncTimestamp()
+        guard normalized > existing else { return }
+        UserDefaults.standard.set(Int(normalized), forKey: syncCursorKey)
+    }
+
+    private func normalizeSyncTimestamp(_ raw: Int64) -> Int64 {
+        raw < 1_000_000_000_000 ? raw * 1000 : raw
+    }
+
+    private static func decryptIncomingMessage(
+        packet: PacketMessage,
+        myPublicKey: String,
+        privateKeyHex: String?
+    ) -> String? {
+        guard let privateKeyHex,
+              !packet.content.isEmpty
+        else {
+            return nil
+        }
+
+        // Android parity for own sync packets: prefer aesChachaKey if present.
+        if packet.fromPublicKey == myPublicKey,
+           !packet.aesChachaKey.isEmpty,
+           let decryptedPayload = try? CryptoManager.shared.decryptWithPassword(
+            packet.aesChachaKey,
+            password: privateKeyHex
+           )
+        {
+            let keyAndNonce = MessageCrypto.androidUtf8BytesToLatin1Bytes(decryptedPayload)
+            if let text = try? MessageCrypto.decryptIncomingWithPlainKey(
+                ciphertext: packet.content,
+                plainKeyAndNonce: keyAndNonce
+            ) {
+                return text
+            }
+            Self.logger.debug("Own message fallback: aesChachaKey decoded but payload decryption failed for \(packet.messageId)")
+        } else if packet.fromPublicKey == myPublicKey, !packet.aesChachaKey.isEmpty {
+            Self.logger.debug("Own message fallback: failed to decode aesChachaKey for \(packet.messageId)")
+        }
+
+        guard !packet.chachaKey.isEmpty else {
+            return nil
+        }
+
+        do {
+            return try MessageCrypto.decryptIncoming(
+                ciphertext: packet.content,
+                encryptedKey: packet.chachaKey,
+                myPrivateKeyHex: privateKeyHex
+            )
+        } catch {
+            Self.logger.error("Message decryption failed: \(error.localizedDescription)")
+            return nil
+        }
+    }
+
+    private static func isUnsupportedDialogKey(_ value: String) -> Bool {
+        let normalized = value.trimmingCharacters(in: .whitespacesAndNewlines).lowercased()
+        if normalized.isEmpty { return true }
+        return normalized.hasPrefix("#")
+            || normalized.hasPrefix("group:")
+            || normalized.hasPrefix("conversation:")
+    }
+
+    private static func isSupportedDirectPeerKey(_ peerKey: String, ownKey: String) -> Bool {
+        let normalized = peerKey.trimmingCharacters(in: .whitespacesAndNewlines)
+        if normalized.isEmpty { return false }
+        if normalized == ownKey { return true }
+        if SystemAccounts.isSystemAccount(normalized) { return true }
+        return !isUnsupportedDialogKey(normalized)
+    }
+
+    private static func isSupportedDirectMessagePacket(_ packet: PacketMessage, ownKey: String) -> Bool {
+        if ownKey.isEmpty { return false }
+        let from = packet.fromPublicKey.trimmingCharacters(in: .whitespacesAndNewlines)
+        let to = packet.toPublicKey.trimmingCharacters(in: .whitespacesAndNewlines)
+        if from.isEmpty || to.isEmpty { return false }
+
+        if from == ownKey {
+            return isSupportedDirectPeerKey(to, ownKey: ownKey)
+        }
+        if to == ownKey {
+            return isSupportedDirectPeerKey(from, ownKey: ownKey)
+        }
+        return false
+    }
+
+    private static func isSupportedDirectReadPacket(_ packet: PacketRead, ownKey: String) -> Bool {
+        if ownKey.isEmpty { return false }
+        let from = packet.fromPublicKey.trimmingCharacters(in: .whitespacesAndNewlines)
+        let to = packet.toPublicKey.trimmingCharacters(in: .whitespacesAndNewlines)
+        if from.isEmpty || to.isEmpty { return false }
+
+        if from == ownKey {
+            return isSupportedDirectPeerKey(to, ownKey: ownKey)
+        }
+        if to == ownKey {
+            return isSupportedDirectPeerKey(from, ownKey: ownKey)
+        }
+        return false
+    }
+
+    private func requestUserInfoIfNeeded(opponentKey: String, privateKeyHash: String?) {
+        guard let privateKeyHash else { return }
+        let normalized = opponentKey.trimmingCharacters(in: .whitespacesAndNewlines)
+        guard !normalized.isEmpty else { return }
+        guard !requestedUserInfoKeys.contains(normalized) else { return }
+
+        requestedUserInfoKeys.insert(normalized)
+
+        var searchPacket = PacketSearch()
+        searchPacket.privateKey = privateKeyHash
+        searchPacket.search = normalized
+        ProtocolManager.shared.sendPacket(searchPacket)
+    }
+
+    private func makeOutgoingPacket(
+        text: String,
+        toPublicKey: String,
+        messageId: String,
+        timestamp: Int64,
+        privateKeyHex: String,
+        privateKeyHash: String
+    ) throws -> PacketMessage {
+        let encrypted = try MessageCrypto.encryptOutgoing(
+            plaintext: text,
+            recipientPublicKeyHex: toPublicKey
+        )
+
+        guard let latin1String = String(data: encrypted.plainKeyAndNonce, encoding: .isoLatin1) else {
+            throw CryptoError.encryptionFailed
+        }
+        let aesChachaPayload = Data(latin1String.utf8)
+        let aesChachaKey = try CryptoManager.shared.encryptWithPassword(
+            aesChachaPayload,
+            password: privateKeyHex
+        )
+
+        var packet = PacketMessage()
+        packet.fromPublicKey = currentPublicKey
+        packet.toPublicKey = toPublicKey
+        packet.content = encrypted.content
+        packet.chachaKey = encrypted.chachaKey
+        packet.timestamp = timestamp
+        packet.privateKey = privateKeyHash
+        packet.messageId = messageId
+        packet.aesChachaKey = aesChachaKey
+        return packet
+    }
+
+    private func retryWaitingOutgoingMessagesAfterReconnect() {
+        guard !currentPublicKey.isEmpty,
+              let privateKeyHex,
+              let privateKeyHash
+        else { return }
+
+        let now = Int64(Date().timeIntervalSince1970 * 1000)
+        let result = MessageRepository.shared.resolveWaitingOutgoingMessages(
+            myPublicKey: currentPublicKey,
+            nowMs: now,
+            maxAgeMs: maxOutgoingWaitingLifetimeMs
+        )
+
+        for expired in result.expired {
+            if MessageRepository.shared.isLatestMessage(expired.messageId, in: expired.dialogKey) {
+                DialogRepository.shared.updateDeliveryStatus(
+                    messageId: expired.messageId,
+                    opponentKey: expired.dialogKey,
+                    status: .error
+                )
+            }
+            resolveOutgoingRetry(messageId: expired.messageId)
+        }
+
+        for message in result.retryable {
+            if message.toPublicKey == currentPublicKey {
+                continue
+            }
+
+            let text = message.text.trimmingCharacters(in: .whitespacesAndNewlines)
+            guard !text.isEmpty else { continue }
+
+            do {
+                let packet = try makeOutgoingPacket(
+                    text: text,
+                    toPublicKey: message.toPublicKey,
+                    messageId: message.id,
+                    timestamp: message.timestamp,
+                    privateKeyHex: privateKeyHex,
+                    privateKeyHash: privateKeyHash
+                )
+                ProtocolManager.shared.sendPacket(packet)
+                registerOutgoingRetry(for: packet)
+            } catch {
+                Self.logger.error("Failed to retry waiting message \(message.id): \(error.localizedDescription)")
+            }
+        }
+    }
+
+    private func flushPendingReadReceipts() {
+        guard !pendingReadReceiptKeys.isEmpty else { return }
+        let keys = pendingReadReceiptKeys
+        pendingReadReceiptKeys.removeAll()
+        for key in keys {
+            sendReadReceipt(toPublicKey: key, force: true)
+        }
+    }
+
+    private func sendReadReceipt(toPublicKey: String, force: Bool) {
+        let normalized = toPublicKey.trimmingCharacters(in: .whitespacesAndNewlines)
+        guard normalized != currentPublicKey,
+              !normalized.isEmpty,
+              let hash = privateKeyHash,
+              ProtocolManager.shared.connectionState == .authenticated
+        else { return }
+
+        let now = Int64(Date().timeIntervalSince1970 * 1000)
+        if !force {
+            let lastSent = lastReadReceiptSentAt[normalized] ?? 0
+            if now - lastSent < 400 {
+                return
+            }
+        }
+        lastReadReceiptSentAt[normalized] = now
+
+        var packet = PacketRead()
+        packet.privateKey = hash
+        packet.fromPublicKey = currentPublicKey
+        packet.toPublicKey = normalized
+        ProtocolManager.shared.sendPacket(packet)
+    }
+
+    private func registerOutgoingRetry(for packet: PacketMessage) {
+        let messageId = packet.messageId
+        pendingOutgoingRetryTasks[messageId]?.cancel()
+        pendingOutgoingPackets[messageId] = packet
+        pendingOutgoingAttempts[messageId] = 0
+        scheduleOutgoingRetry(messageId: messageId)
+    }
+
+    private func scheduleOutgoingRetry(messageId: String) {
+        pendingOutgoingRetryTasks[messageId]?.cancel()
+        pendingOutgoingRetryTasks[messageId] = Task { @MainActor [weak self] in
+            guard let self else { return }
+            try? await Task.sleep(for: .seconds(4))
+
+            guard let packet = self.pendingOutgoingPackets[messageId] else { return }
+            let attempts = self.pendingOutgoingAttempts[messageId] ?? 0
+            guard attempts < self.maxOutgoingRetryAttempts else {
+                self.resolveOutgoingRetry(messageId: messageId)
+                return
+            }
+
+            guard ProtocolManager.shared.connectionState == .authenticated else {
+                self.scheduleOutgoingRetry(messageId: messageId)
+                return
+            }
+
+            let nextAttempt = attempts + 1
+            self.pendingOutgoingAttempts[messageId] = nextAttempt
+            Self.logger.warning("Retrying message \(messageId), attempt \(nextAttempt)")
+            ProtocolManager.shared.sendPacket(packet)
+            self.scheduleOutgoingRetry(messageId: messageId)
+        }
+    }
+
+    private func resolveOutgoingRetry(messageId: String) {
+        pendingOutgoingRetryTasks[messageId]?.cancel()
+        pendingOutgoingRetryTasks.removeValue(forKey: messageId)
+        pendingOutgoingPackets.removeValue(forKey: messageId)
+        pendingOutgoingAttempts.removeValue(forKey: messageId)
+    }
 }

Rosetta/DesignSystem/Components/LottieView.swift

@@ -45,6 +45,15 @@ struct LottieView: UIViewRepresentable, Equatable {
         lhs.isPlaying == rhs.isPlaying
     }
 
+    func makeCoordinator() -> Coordinator {
+        Coordinator()
+    }
+
+    final class Coordinator {
+        var didPlayOnce = false
+        var lastAnimationName = ""
+    }
+
     func makeUIView(context: Context) -> LottieAnimationView {
         let animationView: LottieAnimationView
         if let cached = LottieAnimationCache.shared.animation(named: animationName) {
@@ -57,21 +66,45 @@ struct LottieView: UIViewRepresentable, Equatable {
         animationView.animationSpeed = animationSpeed
         animationView.setContentCompressionResistancePriority(.defaultLow, for: .horizontal)
         animationView.setContentCompressionResistancePriority(.defaultLow, for: .vertical)
-        if isPlaying {
-            animationView.play()
-        }
+        context.coordinator.lastAnimationName = animationName
+        playIfNeeded(animationView, coordinator: context.coordinator)
         return animationView
     }
 
     func updateUIView(_ uiView: LottieAnimationView, context: Context) {
-        if isPlaying {
-            if !uiView.isAnimationPlaying {
-                uiView.play()
+        if context.coordinator.lastAnimationName != animationName {
+            if let cached = LottieAnimationCache.shared.animation(named: animationName) {
+                uiView.animation = cached
+            } else {
+                uiView.animation = LottieAnimation.named(animationName)
             }
-        } else {
+            context.coordinator.lastAnimationName = animationName
+            context.coordinator.didPlayOnce = false
+        }
+
+        uiView.loopMode = loopMode
+        uiView.animationSpeed = animationSpeed
+
+        if !isPlaying {
+            context.coordinator.didPlayOnce = false
             if uiView.isAnimationPlaying {
                 uiView.stop()
             }
+            return
+        }
+
+        playIfNeeded(uiView, coordinator: context.coordinator)
+    }
+
+    private func playIfNeeded(_ view: LottieAnimationView, coordinator: Coordinator) {
+        if loopMode == .playOnce {
+            guard !coordinator.didPlayOnce else { return }
+            coordinator.didPlayOnce = true
+            view.play()
+            return
+        }
+        if !view.isAnimationPlaying {
+            view.play()
         }
     }
 }

Rosetta/DesignSystem/Components/RosettaTabBar.swift

@@ -1,21 +1,6 @@
 import SwiftUI
 import UIKit
 
-// MARK: - Glass Effect ID Modifier (iOS 26+)
-
-private struct GlassEffectIDModifier: ViewModifier {
-    let id: String
-    let namespace: Namespace.ID?
-
-    nonisolated func body(content: Content) -> some View {
-        if #available(iOS 26, *), let namespace {
-            content.glassEffectID(id, in: namespace)
-        } else {
-            content
-        }
-    }
-}
-
 // MARK: - Tab
 
 enum RosettaTab: CaseIterable, Sendable {
@@ -23,11 +8,13 @@ enum RosettaTab: CaseIterable, Sendable {
     case settings
     case search
 
+    static let interactionOrder: [RosettaTab] = [.chats, .settings, .search]
+
     var label: String {
         switch self {
         case .chats: return "Chats"
         case .settings: return "Settings"
-        case .search: return ""
+        case .search: return "Search"
         }
     }
 
@@ -46,6 +33,10 @@ enum RosettaTab: CaseIterable, Sendable {
         case .search: return "magnifyingglass"
         }
     }
+
+    var interactionIndex: Int {
+        Self.interactionOrder.firstIndex(of: self) ?? 0
+    }
 }
 
 // MARK: - Tab Badge
@@ -55,27 +46,47 @@ struct TabBadge {
     let text: String
 }
 
+struct TabBarSwipeState {
+    let fromTab: RosettaTab
+    let hoveredTab: RosettaTab
+    let fractionalIndex: CGFloat
+}
+
 // MARK: - RosettaTabBar
 
 struct RosettaTabBar: View {
     let selectedTab: RosettaTab
     var onTabSelected: ((RosettaTab) -> Void)?
+    var onSwipeStateChanged: ((TabBarSwipeState?) -> Void)?
     var badges: [TabBadge] = []
 
-    @Namespace private var glassNS
+    @State private var tabFrames: [RosettaTab: CGRect] = [:]
+    @State private var interactionState: TabPressInteraction?
+
+    private static let tabBarSpace = "RosettaTabBarSpace"
+    private let lensLiftOffset: CGFloat = 12
 
     var body: some View {
-        if #available(iOS 26, *) {
-            GlassEffectContainer(spacing: 8) {
-                tabBarContent
-            }
+        interactiveTabBarContent
             .padding(.horizontal, 25)
             .padding(.top, 4)
-        } else {
-            tabBarContent
-                .padding(.horizontal, 25)
-                .padding(.top, 4)
-        }
+    }
+
+    private var interactiveTabBarContent: some View {
+        tabBarContent
+            .coordinateSpace(name: Self.tabBarSpace)
+            .onPreferenceChange(TabFramePreferenceKey.self) { frames in
+                tabFrames = frames
+            }
+            .contentShape(Rectangle())
+            .gesture(tabSelectionGesture)
+            .overlay(alignment: .topLeading) {
+                liftedLensOverlay
+            }
+            .onDisappear {
+                interactionState = nil
+                onSwipeStateChanged?(nil)
+            }
     }
 
     private var tabBarContent: some View {
@@ -84,29 +95,185 @@ struct RosettaTabBar: View {
             searchPill
         }
     }
+
+    private var visualSelectedTab: RosettaTab {
+        if let interactionState, interactionState.isLifted {
+            return interactionState.hoveredTab
+        }
+        return selectedTab
+    }
+
+    private var tabSelectionGesture: some Gesture {
+        DragGesture(minimumDistance: 0, coordinateSpace: .named(Self.tabBarSpace))
+            .onChanged(handleGestureChanged)
+            .onEnded(handleGestureEnded)
+    }
+
+    private func handleGestureChanged(_ value: DragGesture.Value) {
+        guard !tabFrames.isEmpty else {
+            return
+        }
+
+        if interactionState == nil {
+            guard let startTab = tabAtStart(location: value.startLocation),
+                  let startFrame = tabFrames[startTab]
+            else {
+                return
+            }
+
+            let state = TabPressInteraction(
+                id: UUID(),
+                startTab: startTab,
+                startCenterX: startFrame.midX,
+                currentCenterX: startFrame.midX,
+                hoveredTab: startTab,
+                isLifted: true
+            )
+            UIImpactFeedbackGenerator(style: .light).impactOccurred()
+            interactionState = state
+            publishSwipeState(for: state)
+            return
+        }
+
+        guard var state = interactionState else {
+            return
+        }
+
+        state.currentCenterX = clampedCenterX(state.startCenterX + value.translation.width)
+
+        if let nearest = nearestTab(toX: state.currentCenterX), nearest != state.hoveredTab {
+            state.hoveredTab = nearest
+            if state.isLifted {
+                UIImpactFeedbackGenerator(style: .soft).impactOccurred()
+            }
+        }
+
+        interactionState = state
+        publishSwipeState(for: state)
+    }
+
+    private func handleGestureEnded(_ value: DragGesture.Value) {
+        guard let state = interactionState else {
+            return
+        }
+
+        let targetTab = nearestTab(toX: value.location.x) ?? state.hoveredTab
+
+        withAnimation(.spring(response: 0.34, dampingFraction: 0.72)) {
+            interactionState = nil
+        }
+
+        onSwipeStateChanged?(nil)
+        onTabSelected?(targetTab)
+    }
+
+    private func publishSwipeState(for state: TabPressInteraction) {
+        guard state.isLifted,
+              let fractionalIndex = fractionalIndex(for: state.currentCenterX)
+        else {
+            onSwipeStateChanged?(nil)
+            return
+        }
+
+        onSwipeStateChanged?(
+            TabBarSwipeState(
+                fromTab: state.startTab,
+                hoveredTab: state.hoveredTab,
+                fractionalIndex: fractionalIndex
+            )
+        )
+    }
+
+    private func tabAtStart(location: CGPoint) -> RosettaTab? {
+        guard let nearest = nearestTab(toX: location.x),
+              let frame = tabFrames[nearest]
+        else {
+            return nil
+        }
+
+        return frame.insetBy(dx: -18, dy: -18).contains(location) ? nearest : nil
+    }
+
+    private func nearestTab(toX x: CGFloat) -> RosettaTab? {
+        tabFrames.min { lhs, rhs in
+            abs(lhs.value.midX - x) < abs(rhs.value.midX - x)
+        }?.key
+    }
+
+    private func clampedCenterX(_ value: CGFloat) -> CGFloat {
+        let centers = tabFrames.values.map(\.midX)
+        guard let minX = centers.min(), let maxX = centers.max() else {
+            return value
+        }
+        return min(max(value, minX), maxX)
+    }
+
+    private func fractionalIndex(for centerX: CGFloat) -> CGFloat? {
+        let centers = RosettaTab.interactionOrder.compactMap { tab -> CGFloat? in
+            tabFrames[tab]?.midX
+        }
+
+        guard centers.count == RosettaTab.interactionOrder.count else {
+            return nil
+        }
+
+        if centerX <= centers[0] {
+            return 0
+        }
+        if centerX >= centers[centers.count - 1] {
+            return CGFloat(centers.count - 1)
+        }
+
+        for index in 0 ..< centers.count - 1 {
+            let left = centers[index]
+            let right = centers[index + 1]
+            guard centerX >= left, centerX <= right else {
+                continue
+            }
+            let progress = (centerX - left) / max(1, right - left)
+            return CGFloat(index) + progress
+        }
+
+        return nil
+    }
+
+    private func badgeText(for tab: RosettaTab) -> String? {
+        badges.first(where: { $0.tab == tab })?.text
+    }
+
+    private func isCoveredByLens(_ tab: RosettaTab) -> Bool {
+        interactionState?.isLifted == true && interactionState?.hoveredTab == tab
+    }
+
+    private func lensDiameter(for tab: RosettaTab) -> CGFloat {
+        switch tab {
+        case .search:
+            return 88
+        default:
+            return 104
+        }
+    }
 }
 
 // MARK: - Main Tabs Pill
 
 private extension RosettaTabBar {
     var mainTabsPill: some View {
-        // Content on top — NOT clipped (lens can pop out)
         HStack(spacing: 0) {
             ForEach(RosettaTab.allCases.filter { $0 != .search }, id: \.self) { tab in
-                TabItemButton(
+                TabItemView(
                     tab: tab,
-                    isSelected: tab == selectedTab,
-                    badgeText: badges.first(where: { $0.tab == tab })?.text,
-                    onTap: { onTabSelected?(tab) },
-                    glassNamespace: glassNS
+                    isSelected: tab == visualSelectedTab,
+                    isCoveredByLens: isCoveredByLens(tab),
+                    badgeText: badgeText(for: tab)
                 )
+                .tabFramePreference(tab: tab, in: Self.tabBarSpace)
             }
         }
         .padding(.horizontal, 4)
         .padding(.top, 3)
         .padding(.bottom, 3)
         .frame(height: 62)
-        // Background clipped separately — content stays unclipped
         .background {
             mainPillGlass
         }
@@ -114,106 +281,117 @@ private extension RosettaTabBar {
 
     @ViewBuilder
     var mainPillGlass: some View {
-        if #available(iOS 26, *) {
-            Capsule().fill(.clear).glassEffect(.regular, in: .capsule)
-        } else {
-            ZStack {
-                // 1. Material
-                Capsule().fill(.ultraThinMaterial)
-                // 2. Dark tint
-                Capsule().fill(Color.black.opacity(0.22))
-                // 3. Highlight
-                Capsule().fill(
-                    LinearGradient(
-                        colors: [Color.white.opacity(0.14), .clear],
-                        startPoint: .top,
-                        endPoint: .bottom
-                    )
-                ).blendMode(.screen)
-                // 4a. Outer stroke
-                Capsule().stroke(Color.white.opacity(0.10), lineWidth: 1)
-                // 4b. Inner stroke
-                Capsule().stroke(Color.white.opacity(0.18), lineWidth: 1).padding(1.5)
-            }
-            // 5. Shadows
-            .shadow(color: Color.black.opacity(0.45), radius: 22, y: 14)
+        ZStack {
+            Capsule().fill(.ultraThinMaterial)
+            Capsule().fill(Color.black.opacity(0.34))
+            Capsule().fill(
+                LinearGradient(
+                    colors: [Color.white.opacity(0.08), .clear],
+                    startPoint: .top,
+                    endPoint: .bottom
+                )
+            ).blendMode(.screen)
+            Capsule().stroke(Color.white.opacity(0.12), lineWidth: 1)
+            Capsule().stroke(Color.white.opacity(0.08), lineWidth: 1).padding(1.5)
         }
+        .shadow(color: Color.black.opacity(0.45), radius: 22, y: 14)
+    }
+
+    @ViewBuilder
+    var liftedLensOverlay: some View {
+        if let state = interactionState,
+           state.isLifted,
+           let hoveredFrame = tabFrames[state.hoveredTab]
+        {
+            let diameter = lensDiameter(for: state.hoveredTab)
+
+            ZStack {
+                lensBubble
+                LensTabContentView(
+                    tab: state.hoveredTab,
+                    badgeText: badgeText(for: state.hoveredTab)
+                )
+                .padding(.top, state.hoveredTab == .search ? 0 : 8)
+            }
+            .frame(width: diameter, height: diameter)
+            .position(x: state.currentCenterX, y: hoveredFrame.midY - lensLiftOffset)
+            .shadow(color: .black.opacity(0.42), radius: 24, y: 15)
+            .shadow(color: Color.cyan.opacity(0.10), radius: 20, y: 1)
+            .allowsHitTesting(false)
+            .transition(.scale(scale: 0.86).combined(with: .opacity))
+            .animation(.spring(response: 0.34, dampingFraction: 0.74), value: state.isLifted)
+            .zIndex(20)
+        }
+    }
+
+    @ViewBuilder
+    var lensBubble: some View {
+        ZStack {
+            Circle().fill(.ultraThinMaterial)
+            Circle().fill(Color.black.opacity(0.38))
+            Circle().fill(
+                LinearGradient(
+                    colors: [Color.white.opacity(0.08), Color.white.opacity(0.01), .clear],
+                    startPoint: .topLeading,
+                    endPoint: .bottomTrailing
+                )
+            )
+            Circle().stroke(Color.white.opacity(0.16), lineWidth: 1)
+            Circle().stroke(Color.white.opacity(0.06), lineWidth: 1).padding(1.6)
+            Circle().stroke(
+                AngularGradient(
+                    colors: [
+                        Color.cyan.opacity(0.34),
+                        Color.blue.opacity(0.28),
+                        Color.pink.opacity(0.28),
+                        Color.orange.opacity(0.30),
+                        Color.yellow.opacity(0.20),
+                        Color.cyan.opacity(0.34),
+                    ],
+                    center: .center
+                ),
+                lineWidth: 1.1
+            ).blendMode(.screen)
+        }
+        .compositingGroup()
     }
 }
 
-// MARK: - Tab Item Button
+// MARK: - Tab Item
 
-private struct TabItemButton: View {
+private struct TabItemView: View {
     let tab: RosettaTab
     let isSelected: Bool
+    let isCoveredByLens: Bool
     let badgeText: String?
-    let onTap: () -> Void
-    var glassNamespace: Namespace.ID?
-
-    @State private var pressed = false
 
     var body: some View {
-        Button(action: onTap) {
-            VStack(spacing: 1) {
-                ZStack(alignment: .topTrailing) {
-                    Image(systemName: isSelected ? tab.selectedIcon : tab.icon)
-                        .font(.system(size: 22))
-                        .foregroundStyle(tabColor)
-                        .frame(height: 30)
-
-                    if let badgeText {
-                        Text(badgeText)
-                            .font(.system(size: 10, weight: .medium))
-                            .foregroundStyle(.white)
-                            .padding(.horizontal, badgeText.count > 2 ? 4 : 0)
-                            .frame(minWidth: 18, minHeight: 18)
-                            .background(Capsule().fill(RosettaColors.error))
-                            .offset(x: 10, y: -4)
-                    }
-                }
-
-                Text(tab.label)
-                    .font(.system(size: 10, weight: isSelected ? .bold : .medium))
+        VStack(spacing: 1) {
+            ZStack(alignment: .topTrailing) {
+                Image(systemName: isSelected ? tab.selectedIcon : tab.icon)
+                    .font(.system(size: 22))
                     .foregroundStyle(tabColor)
-            }
-            .frame(maxWidth: .infinity)
-            .background {
-                if isSelected && !pressed {
-                    RoundedRectangle(cornerRadius: 100)
-                        .fill(RosettaColors.adaptive(
-                            light: Color(hex: 0xEDEDED),
-                            dark: Color.white.opacity(0.12)
-                        ))
-                        .padding(.horizontal, -8)
-                        .padding(.vertical, -6)
+                    .frame(height: 30)
+
+                if let badgeText {
+                    Text(badgeText)
+                        .font(.system(size: 10, weight: .medium))
+                        .foregroundStyle(.white)
+                        .padding(.horizontal, badgeText.count > 2 ? 4 : 0)
+                        .frame(minWidth: 18, minHeight: 18)
+                        .background(Capsule().fill(RosettaColors.error))
+                        .offset(x: 10, y: -4)
                 }
             }
+
+            Text(tab.label)
+                .font(.system(size: 10, weight: isSelected ? .bold : .medium))
+                .foregroundStyle(tabColor)
         }
-        .buttonStyle(.plain)
-        // Lens: padding → glass bubble → scale → lift
+        .frame(maxWidth: .infinity)
         .padding(14)
-        .background {
-            if pressed {
-                lensBubble
-                    .transition(.scale(scale: 0.8).combined(with: .opacity))
-            }
-        }
-        .scaleEffect(pressed ? 1.12 : 1)
-        .offset(y: pressed ? -28 : 0)
-        .shadow(color: .black.opacity(pressed ? 0.45 : 0), radius: 22, y: 14)
-        .shadow(color: Color.cyan.opacity(pressed ? 0.12 : 0), radius: 20, y: 0)
-        .animation(.spring(response: 0.34, dampingFraction: 0.65), value: pressed)
-        .simultaneousGesture(
-            DragGesture(minimumDistance: 0)
-                .onChanged { _ in
-                    if !pressed {
-                        pressed = true
-                        UIImpactFeedbackGenerator(style: .light).impactOccurred()
-                    }
-                }
-                .onEnded { _ in pressed = false }
-        )
-        .modifier(GlassEffectIDModifier(id: "\(tab)", namespace: glassNamespace))
+        .opacity(isCoveredByLens ? 0.07 : 1)
+        .animation(.easeInOut(duration: 0.14), value: isCoveredByLens)
         .accessibilityLabel(tab.label)
         .accessibilityAddTraits(isSelected ? .isSelected : [])
     }
@@ -226,177 +404,126 @@ private struct TabItemButton: View {
                 dark: Color(hex: 0x8E8E93)
             )
     }
-
-    // MARK: Lens Bubble
-
-    @ViewBuilder
-    private var lensBubble: some View {
-        if #available(iOS 26, *) {
-            Circle()
-                .fill(.clear)
-                .glassEffect(.regular.interactive(), in: .circle)
-        } else {
-            ZStack {
-                // 1. Material
-                Circle().fill(.ultraThinMaterial)
-                // 2. Dark tint
-                Circle().fill(Color.black.opacity(0.22))
-                // 3. Highlight (top→bottom, screen blend)
-                Circle().fill(
-                    LinearGradient(
-                        colors: [Color.white.opacity(0.14), .clear],
-                        startPoint: .topLeading,
-                        endPoint: .bottomTrailing
-                    )
-                ).blendMode(.screen)
-                // 4a. Outer stroke
-                Circle().stroke(Color.white.opacity(0.10), lineWidth: 1)
-                // 4b. Inner stroke
-                Circle().stroke(Color.white.opacity(0.18), lineWidth: 1).padding(1.5)
-                // 6. Rainbow (thin, subtle, screen blend)
-                Circle().stroke(
-                    AngularGradient(
-                        colors: [
-                            Color.cyan.opacity(0.55),
-                            Color.blue.opacity(0.55),
-                            Color.purple.opacity(0.55),
-                            Color.pink.opacity(0.55),
-                            Color.orange.opacity(0.55),
-                            Color.yellow.opacity(0.45),
-                            Color.cyan.opacity(0.55),
-                        ],
-                        center: .center
-                    ),
-                    lineWidth: 1.4
-                ).blendMode(.screen)
-            }
-        }
-    }
 }
 
 // MARK: - Search Pill
 
 private extension RosettaTabBar {
     var searchPill: some View {
-        SearchPillButton(
-            isSelected: selectedTab == .search,
-            onTap: { onTabSelected?(.search) },
-            glassNamespace: glassNS
+        SearchPillView(
+            isSelected: visualSelectedTab == .search,
+            isCoveredByLens: isCoveredByLens(.search)
         )
+        .tabFramePreference(tab: .search, in: Self.tabBarSpace)
     }
 }
 
-private struct SearchPillButton: View {
+private struct SearchPillView: View {
     let isSelected: Bool
-    let onTap: () -> Void
-    var glassNamespace: Namespace.ID?
-
-    @State private var pressed = false
+    let isCoveredByLens: Bool
 
     var body: some View {
-        Button(action: onTap) {
-            Image(systemName: "magnifyingglass")
-                .font(.system(size: 17, weight: .semibold))
-                .foregroundStyle(
-                    isSelected
-                        ? RosettaColors.primaryBlue
-                        : RosettaColors.adaptive(
-                            light: Color(hex: 0x404040),
-                            dark: Color(hex: 0x8E8E93)
-                        )
-                )
-        }
-        .buttonStyle(.plain)
-        // Lens
-        .padding(14)
-        .background {
-            if pressed {
-                searchLensBubble
-                    .transition(.scale(scale: 0.8).combined(with: .opacity))
-            }
-        }
-        .scaleEffect(pressed ? 1.15 : 1)
-        .offset(y: pressed ? -28 : 0)
-        .shadow(color: .black.opacity(pressed ? 0.45 : 0), radius: 22, y: 14)
-        .shadow(color: Color.cyan.opacity(pressed ? 0.12 : 0), radius: 20, y: 0)
-        .animation(.spring(response: 0.34, dampingFraction: 0.65), value: pressed)
-        .simultaneousGesture(
-            DragGesture(minimumDistance: 0)
-                .onChanged { _ in
-                    if !pressed {
-                        pressed = true
-                        UIImpactFeedbackGenerator(style: .light).impactOccurred()
-                    }
-                }
-                .onEnded { _ in pressed = false }
-        )
-        .frame(width: 62, height: 62)
-        // Background clipped separately
-        .background { searchPillGlass }
-        .modifier(GlassEffectIDModifier(id: "search", namespace: glassNamespace))
-        .accessibilityLabel("Search")
-        .accessibilityAddTraits(isSelected ? .isSelected : [])
-    }
-
-    // MARK: Lens for search
-
-    @ViewBuilder
-    private var searchLensBubble: some View {
-        if #available(iOS 26, *) {
-            Circle()
-                .fill(.clear)
-                .glassEffect(.regular.interactive(), in: .circle)
-        } else {
-            ZStack {
-                Circle().fill(.ultraThinMaterial)
-                Circle().fill(Color.black.opacity(0.22))
-                Circle().fill(
-                    LinearGradient(
-                        colors: [Color.white.opacity(0.14), .clear],
-                        startPoint: .topLeading,
-                        endPoint: .bottomTrailing
+        Image(systemName: "magnifyingglass")
+            .font(.system(size: 17, weight: .semibold))
+            .foregroundStyle(
+                isSelected
+                    ? RosettaColors.primaryBlue
+                    : RosettaColors.adaptive(
+                        light: Color(hex: 0x404040),
+                        dark: Color(hex: 0x8E8E93)
                     )
-                ).blendMode(.screen)
-                Circle().stroke(Color.white.opacity(0.10), lineWidth: 1)
-                Circle().stroke(Color.white.opacity(0.18), lineWidth: 1).padding(1.5)
-                Circle().stroke(
-                    AngularGradient(
-                        colors: [
-                            Color.cyan.opacity(0.55),
-                            Color.blue.opacity(0.55),
-                            Color.purple.opacity(0.55),
-                            Color.pink.opacity(0.55),
-                            Color.orange.opacity(0.55),
-                            Color.yellow.opacity(0.45),
-                            Color.cyan.opacity(0.55),
-                        ],
-                        center: .center
-                    ),
-                    lineWidth: 1.4
-                ).blendMode(.screen)
-            }
-        }
+            )
+            .frame(width: 62, height: 62)
+            .opacity(isCoveredByLens ? 0.08 : 1)
+            .animation(.easeInOut(duration: 0.14), value: isCoveredByLens)
+            .background { searchPillGlass }
+            .accessibilityLabel("Search")
+            .accessibilityAddTraits(isSelected ? .isSelected : [])
     }
 
     @ViewBuilder
     private var searchPillGlass: some View {
-        if #available(iOS 26, *) {
-            Circle().fill(.clear).glassEffect(.regular, in: .circle)
+        ZStack {
+            Circle().fill(.ultraThinMaterial)
+            Circle().fill(Color.black.opacity(0.34))
+            Circle().fill(
+                LinearGradient(
+                    colors: [Color.white.opacity(0.08), .clear],
+                    startPoint: .top,
+                    endPoint: .bottom
+                )
+            ).blendMode(.screen)
+            Circle().stroke(Color.white.opacity(0.12), lineWidth: 1)
+            Circle().stroke(Color.white.opacity(0.08), lineWidth: 1).padding(1.5)
+        }
+        .shadow(color: Color.black.opacity(0.45), radius: 22, y: 14)
+    }
+}
+
+private struct LensTabContentView: View {
+    let tab: RosettaTab
+    let badgeText: String?
+
+    var body: some View {
+        if tab == .search {
+            Image(systemName: "magnifyingglass")
+                .font(.system(size: 29, weight: .semibold))
+                .foregroundStyle(RosettaColors.primaryBlue)
         } else {
-            ZStack {
-                Circle().fill(.ultraThinMaterial)
-                Circle().fill(Color.black.opacity(0.22))
-                Circle().fill(
-                    LinearGradient(
-                        colors: [Color.white.opacity(0.14), .clear],
-                        startPoint: .top,
-                        endPoint: .bottom
-                    )
-                ).blendMode(.screen)
-                Circle().stroke(Color.white.opacity(0.10), lineWidth: 1)
-                Circle().stroke(Color.white.opacity(0.18), lineWidth: 1).padding(1.5)
+            VStack(spacing: 3) {
+                ZStack(alignment: .topTrailing) {
+                    Image(systemName: tab.selectedIcon)
+                        .font(.system(size: 30))
+                        .foregroundStyle(.white)
+                        .frame(height: 36)
+
+                    if let badgeText {
+                        Text(badgeText)
+                            .font(.system(size: 10, weight: .medium))
+                            .foregroundStyle(.white)
+                            .padding(.horizontal, badgeText.count > 2 ? 5 : 0)
+                            .frame(minWidth: 20, minHeight: 20)
+                            .background(Capsule().fill(RosettaColors.error))
+                            .offset(x: 16, y: -9)
+                    }
+                }
+
+                Text(tab.label)
+                    .font(.system(size: 17, weight: .semibold))
+                    .foregroundStyle(RosettaColors.primaryBlue)
+            }
+        }
+    }
+}
+
+// MARK: - Geometry Helpers
+
+private struct TabPressInteraction {
+    let id: UUID
+    let startTab: RosettaTab
+    let startCenterX: CGFloat
+    var currentCenterX: CGFloat
+    var hoveredTab: RosettaTab
+    var isLifted: Bool
+}
+
+private struct TabFramePreferenceKey: PreferenceKey {
+    static var defaultValue: [RosettaTab: CGRect] = [:]
+
+    static func reduce(value: inout [RosettaTab: CGRect], nextValue: () -> [RosettaTab: CGRect]) {
+        value.merge(nextValue(), uniquingKeysWith: { _, new in new })
+    }
+}
+
+private extension View {
+    func tabFramePreference(tab: RosettaTab, in coordinateSpace: String) -> some View {
+        background {
+            GeometryReader { proxy in
+                Color.clear.preference(
+                    key: TabFramePreferenceKey.self,
+                    value: [tab: proxy.frame(in: .named(coordinateSpace))]
+                )
             }
-            .shadow(color: Color.black.opacity(0.45), radius: 22, y: 14)
         }
     }
 }
@@ -407,13 +534,6 @@ private struct SearchPillButton: View {
     ZStack(alignment: .bottom) {
         Color.black.ignoresSafeArea()
 
-        VStack {
-            Spacer()
-            Text("Hold a tab to see the lens")
-                .foregroundStyle(.white.opacity(0.5))
-            Spacer()
-        }
-
         RosettaTabBar(
             selectedTab: .chats,
             badges: [

Rosetta/Features/Chats/ChatList/ChatListSearchContent.swift

@@ -1,4 +1,3 @@
-import Lottie
 import SwiftUI
 
 // MARK: - Chat List Search Content
@@ -9,6 +8,7 @@ struct ChatListSearchContent: View {
     let searchText: String
     @ObservedObject var viewModel: ChatListViewModel
     var onSelectRecent: (String) -> Void
+    var onOpenDialog: (ChatRoute) -> Void
 
     var body: some View {
         let trimmed = searchText.trimmingCharacters(in: .whitespaces)
@@ -46,8 +46,11 @@ private extension ChatListSearchContent {
     var noResultsState: some View {
         VStack(spacing: 20) {
             Spacer()
-            LottieView(animationName: "search", loopMode: .playOnce, animationSpeed: 1.0)
-                .frame(width: 120, height: 120)
+            LottieView(
+                animationName: "search",
+                animationSpeed: 1.0
+            )
+            .frame(width: 120, height: 120)
             Text("Search for users")
                 .font(.system(size: 17, weight: .medium))
                 .foregroundStyle(RosettaColors.Adaptive.text)
@@ -64,7 +67,12 @@ private extension ChatListSearchContent {
         ScrollView {
             LazyVStack(spacing: 0) {
                 ForEach(localResults) { dialog in
-                    ChatRowView(dialog: dialog)
+                    Button {
+                        onOpenDialog(ChatRoute(dialog: dialog))
+                    } label: {
+                        ChatRowView(dialog: dialog)
+                    }
+                    .buttonStyle(.plain)
                 }
 
                 ForEach(serverOnly, id: \.publicKey) { user in
@@ -79,7 +87,7 @@ private extension ChatListSearchContent {
                 Spacer().frame(height: 80)
             }
         }
-        .scrollDismissesKeyboard(.interactively)
+        .scrollDismissesKeyboard(.immediately)
     }
 }
 
@@ -113,15 +121,18 @@ private extension ChatListSearchContent {
                     }
                 }
             }
-            .scrollDismissesKeyboard(.interactively)
+            .scrollDismissesKeyboard(.immediately)
         }
     }
 
     var searchPlaceholder: some View {
         VStack(spacing: 20) {
             Spacer()
-            LottieView(animationName: "search", loopMode: .loop, animationSpeed: 1.0)
-                .frame(width: 120, height: 120)
+            LottieView(
+                animationName: "search",
+                animationSpeed: 1.0
+            )
+            .frame(width: 120, height: 120)
             Text("Search for users")
                 .font(.system(size: 17, weight: .medium))
                 .foregroundStyle(RosettaColors.Adaptive.text)
@@ -200,6 +211,7 @@ private extension ChatListSearchContent {
 
         return Button {
             viewModel.addToRecent(user)
+            onOpenDialog(ChatRoute(user: user))
         } label: {
             HStack(spacing: 12) {
                 AvatarView(

Rosetta/Features/Chats/ChatList/ChatListView.swift

@@ -4,11 +4,13 @@ import SwiftUI
 
 struct ChatListView: View {
     @Binding var isSearchActive: Bool
+    var onChatDetailVisibilityChange: ((Bool) -> Void)? = nil
     @StateObject private var viewModel = ChatListViewModel()
     @State private var searchText = ""
+    @State private var navigationPath: [ChatRoute] = []
 
     var body: some View {
-        NavigationStack {
+        NavigationStack(path: $navigationPath) {
             ZStack {
                 RosettaColors.Adaptive.background
                     .ignoresSafeArea()
@@ -17,7 +19,12 @@ struct ChatListView: View {
                     ChatListSearchContent(
                         searchText: searchText,
                         viewModel: viewModel,
-                        onSelectRecent: { searchText = $0 }
+                        onSelectRecent: { searchText = $0 },
+                        onOpenDialog: { route in
+                            isSearchActive = false
+                            searchText = ""
+                            navigationPath.append(route)
+                        }
                     )
                 } else {
                     normalContent
@@ -36,6 +43,20 @@ struct ChatListView: View {
             .onChange(of: searchText) { _, newValue in
                 viewModel.setSearchQuery(newValue)
             }
+            .navigationDestination(for: ChatRoute.self) { route in
+                ChatDetailView(
+                    route: route,
+                    onPresentedChange: { isPresented in
+                        onChatDetailVisibilityChange?(isPresented)
+                    }
+                )
+            }
+            .onAppear {
+                onChatDetailVisibilityChange?(!navigationPath.isEmpty)
+            }
+            .onChange(of: navigationPath) { _, newPath in
+                onChatDetailVisibilityChange?(!newPath.isEmpty)
+            }
         }
         .tint(RosettaColors.figmaBlue)
     }
@@ -81,11 +102,14 @@ private extension ChatListView {
         }
         .listStyle(.plain)
         .scrollContentBackground(.hidden)
-        .scrollDismissesKeyboard(.interactively)
+        .scrollDismissesKeyboard(.immediately)
     }
 
     func chatRow(_ dialog: Dialog) -> some View {
-        ChatRowView(dialog: dialog)
+        NavigationLink(value: ChatRoute(dialog: dialog)) {
+            ChatRowView(dialog: dialog)
+        }
+        .buttonStyle(.plain)
             .listRowInsets(EdgeInsets())
             .listRowSeparator(.visible)
             .listRowSeparatorTint(RosettaColors.Adaptive.divider)
@@ -175,5 +199,4 @@ private extension ChatListView {
     }
 }
 
-#Preview { ChatListView(isSearchActive: .constant(false)) }
-
+#Preview { ChatListView(isSearchActive: .constant(false), onChatDetailVisibilityChange: nil) }

Rosetta/Features/Chats/ChatList/ChatListViewModel.swift

@@ -19,16 +19,14 @@ final class ChatListViewModel: ObservableObject {
 
     private var searchTask: Task<Void, Never>?
     private var lastSearchedText = ""
-    private static let maxRecent = 20
-
-    private var recentKey: String {
-        "rosetta_recent_searches_\(SessionManager.shared.currentPublicKey)"
-    }
+    private var searchHandlerToken: UUID?
+    private var recentSearchesCancellable: AnyCancellable?
+    private let recentRepository = RecentSearchesRepository.shared
 
     // MARK: - Init
 
     init() {
-        loadRecentSearches()
+        configureRecentSearches()
         setupSearchCallback()
     }
 
@@ -61,11 +59,12 @@ final class ChatListViewModel: ObservableObject {
     // MARK: - Actions
 
     func setSearchQuery(_ query: String) {
-        searchQuery = query
+        searchQuery = normalizeSearchInput(query)
         triggerServerSearch()
     }
 
     func deleteDialog(_ dialog: Dialog) {
+        MessageRepository.shared.deleteDialog(dialog.opponentKey)
         DialogRepository.shared.deleteDialog(opponentKey: dialog.opponentKey)
     }
 
@@ -84,13 +83,21 @@ final class ChatListViewModel: ObservableObject {
     // MARK: - Server Search
 
     private func setupSearchCallback() {
+        if let token = searchHandlerToken {
+            ProtocolManager.shared.removeSearchResultHandler(token)
+        }
+
         Self.logger.debug("Setting up search callback")
-        ProtocolManager.shared.onSearchResult = { [weak self] packet in
+        searchHandlerToken = ProtocolManager.shared.addSearchResultHandler { [weak self] packet in
             DispatchQueue.main.async { [weak self] in
                 guard let self else {
                     Self.logger.debug("Search callback: self is nil")
                     return
                 }
+                guard !self.searchQuery.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty else {
+                    self.isServerSearching = false
+                    return
+                }
                 Self.logger.debug("📥 Search results received: \(packet.users.count) users")
                 self.serverSearchResults = packet.users
                 self.isServerSearching = false
@@ -130,7 +137,7 @@ final class ChatListViewModel: ObservableObject {
             guard !currentQuery.isEmpty, currentQuery == trimmed else { return }
 
             let connState = ProtocolManager.shared.connectionState
-            let hash = SessionManager.shared.privateKeyHash
+            let hash = SessionManager.shared.privateKeyHash ?? ProtocolManager.shared.privateHash
 
             guard connState == .authenticated, let hash else {
                 self.isServerSearching = false
@@ -146,50 +153,32 @@ final class ChatListViewModel: ObservableObject {
         }
     }
 
+    private func normalizeSearchInput(_ input: String) -> String {
+        input.replacingOccurrences(of: "@", with: "")
+            .trimmingCharacters(in: .whitespacesAndNewlines)
+    }
+
     // MARK: - Recent Searches
 
     func addToRecent(_ user: SearchUser) {
-        let recent = RecentSearch(
-            publicKey: user.publicKey,
-            title: user.title,
-            username: user.username,
-            lastSeenText: user.online == 1 ? "online" : "last seen recently"
-        )
-        recentSearches.removeAll { $0.publicKey == user.publicKey }
-        recentSearches.insert(recent, at: 0)
-        if recentSearches.count > Self.maxRecent {
-            recentSearches = Array(recentSearches.prefix(Self.maxRecent))
-        }
-        saveRecentSearches()
+        recentRepository.add(user)
     }
 
     func removeRecentSearch(publicKey: String) {
-        recentSearches.removeAll { $0.publicKey == publicKey }
-        saveRecentSearches()
+        recentRepository.remove(publicKey: publicKey)
     }
 
     func clearRecentSearches() {
-        recentSearches = []
-        saveRecentSearches()
+        recentRepository.clearAll()
     }
 
-    private func loadRecentSearches() {
-        if let data = UserDefaults.standard.data(forKey: recentKey),
-           let list = try? JSONDecoder().decode([RecentSearch].self, from: data) {
-            recentSearches = list
-            return
-        }
-        let oldKey = "rosetta_recent_searches"
-        if let data = UserDefaults.standard.data(forKey: oldKey),
-           let list = try? JSONDecoder().decode([RecentSearch].self, from: data) {
-            recentSearches = list
-            saveRecentSearches()
-            UserDefaults.standard.removeObject(forKey: oldKey)
-        }
-    }
-
-    private func saveRecentSearches() {
-        guard let data = try? JSONEncoder().encode(recentSearches) else { return }
-        UserDefaults.standard.set(data, forKey: recentKey)
+    private func configureRecentSearches() {
+        recentRepository.setAccount(SessionManager.shared.currentPublicKey)
+        recentSearches = recentRepository.recentSearches
+        recentSearchesCancellable = recentRepository.$recentSearches
+            .receive(on: DispatchQueue.main)
+            .sink { [weak self] list in
+                self?.recentSearches = list
+            }
     }
 }

Rosetta/Features/Chats/ChatRoute.swift

@@ -0,0 +1,60 @@
+import Foundation
+
+/// Navigation payload for opening a direct chat.
+struct ChatRoute: Hashable {
+    let publicKey: String
+    let title: String
+    let username: String
+    let verified: Int
+
+    init(publicKey: String, title: String, username: String, verified: Int) {
+        self.publicKey = publicKey
+        self.title = title
+        self.username = username
+        self.verified = verified
+    }
+
+    init(dialog: Dialog) {
+        self.init(
+            publicKey: dialog.opponentKey,
+            title: dialog.opponentTitle,
+            username: dialog.opponentUsername,
+            verified: dialog.verified
+        )
+    }
+
+    init(user: SearchUser) {
+        self.init(
+            publicKey: user.publicKey,
+            title: user.title,
+            username: user.username,
+            verified: user.verified
+        )
+    }
+
+    init(recent: RecentSearch) {
+        self.init(
+            publicKey: recent.publicKey,
+            title: recent.title,
+            username: recent.username,
+            verified: 0
+        )
+    }
+
+    var isSavedMessages: Bool {
+        publicKey == SessionManager.shared.currentPublicKey
+    }
+
+    var displayTitle: String {
+        if isSavedMessages {
+            return "Saved Messages"
+        }
+        if !title.isEmpty {
+            return title
+        }
+        if !username.isEmpty {
+            return "@\(username)"
+        }
+        return String(publicKey.prefix(12))
+    }
+}

Rosetta/Features/Chats/Search/SearchView.swift

@@ -3,38 +3,50 @@ import SwiftUI
 // MARK: - SearchView
 
 struct SearchView: View {
+    var onChatDetailVisibilityChange: ((Bool) -> Void)? = nil
     @State private var viewModel = SearchViewModel()
     @State private var searchText = ""
-    @FocusState private var isSearchFocused: Bool
+    @State private var navigationPath: [ChatRoute] = []
 
     var body: some View {
-        ZStack(alignment: .bottom) {
-            RosettaColors.Adaptive.background
-                .ignoresSafeArea()
+        NavigationStack(path: $navigationPath) {
+            ZStack(alignment: .bottom) {
+                RosettaColors.Adaptive.background
+                    .ignoresSafeArea()
 
-            ScrollView {
-                VStack(spacing: 0) {
-                    if searchText.isEmpty {
-                        favoriteContactsRow
-                        recentSection
-                    } else {
-                        searchResultsContent
+                ScrollView {
+                    VStack(spacing: 0) {
+                        if searchText.isEmpty {
+                            favoriteContactsRow
+                            recentSection
+                        } else {
+                            searchResultsContent
+                        }
+
+                        Spacer().frame(height: 120)
                     }
-
-                    Spacer().frame(height: 120)
                 }
-            }
-            .scrollDismissesKeyboard(.interactively)
+                .scrollDismissesKeyboard(.immediately)
 
-            searchBar
-        }
-        .onChange(of: searchText) { _, newValue in
-            viewModel.setSearchQuery(newValue)
-        }
-        .task {
-            // Auto-focus search field when the view appears
-            try? await Task.sleep(for: .milliseconds(300))
-            isSearchFocused = true
+                searchBar
+            }
+            .onChange(of: searchText) { _, newValue in
+                viewModel.setSearchQuery(newValue)
+            }
+            .navigationDestination(for: ChatRoute.self) { route in
+                ChatDetailView(
+                    route: route,
+                    onPresentedChange: { isPresented in
+                        onChatDetailVisibilityChange?(isPresented)
+                    }
+                )
+            }
+            .onAppear {
+                onChatDetailVisibilityChange?(!navigationPath.isEmpty)
+            }
+            .onChange(of: navigationPath) { _, newPath in
+                onChatDetailVisibilityChange?(!newPath.isEmpty)
+            }
         }
     }
 }
@@ -55,7 +67,6 @@ private extension SearchView {
                 TextField("Search", text: $searchText)
                     .font(.system(size: 17, weight: .medium))
                     .foregroundStyle(RosettaColors.Adaptive.text)
-                    .focused($isSearchFocused)
                     .submitLabel(.search)
                     .autocorrectionDisabled()
                     .textInputAutocapitalization(.never)
@@ -128,7 +139,7 @@ private extension SearchView {
                 HStack(spacing: 4) {
                     ForEach(Array(dialogs), id: \.id) { dialog in
                         Button {
-                            // TODO: Navigate to chat
+                            navigationPath.append(ChatRoute(dialog: dialog))
                         } label: {
                             VStack(spacing: 4) {
                                 AvatarView(
@@ -197,9 +208,11 @@ private extension SearchView {
 
     var emptyState: some View {
         VStack(spacing: 16) {
-            Image(systemName: "magnifyingglass")
-                .font(.system(size: 52))
-                .foregroundStyle(RosettaColors.Adaptive.textSecondary.opacity(0.5))
+            LottieView(
+                animationName: "search",
+                animationSpeed: 1.0
+            )
+            .frame(width: 120, height: 120)
                 .padding(.top, 100)
 
             Text("Search for users")
@@ -221,7 +234,7 @@ private extension SearchView {
         let colorIdx = RosettaColors.avatarColorIndex(for: user.publicKey)
 
         return Button {
-            searchText = user.username.isEmpty ? user.publicKey : user.username
+            navigationPath.append(ChatRoute(recent: user))
         } label: {
             HStack(spacing: 12) {
                 ZStack(alignment: .topTrailing) {
@@ -277,7 +290,7 @@ private extension SearchView {
             searchResults: viewModel.searchResults,
             onSelectUser: { user in
                 viewModel.addToRecent(user)
-                // TODO: Navigate to ChatDetailView for user.publicKey
+                navigationPath.append(ChatRoute(user: user))
             }
         )
     }
@@ -286,6 +299,5 @@ private extension SearchView {
 // MARK: - Preview
 
 #Preview {
-    SearchView()
+    SearchView(onChatDetailVisibilityChange: nil)
 }
-

Rosetta/Features/Chats/Search/SearchViewModel.swift

@@ -1,15 +1,7 @@
+import Combine
 import Foundation
 import os
 
-// MARK: - Recent Search Model
-
-struct RecentSearch: Codable, Equatable {
-    let publicKey: String
-    var title: String
-    var username: String
-    var lastSeenText: String
-}
-
 // MARK: - SearchViewModel
 
 @Observable
@@ -28,25 +20,21 @@ final class SearchViewModel {
 
     private var searchTask: Task<Void, Never>?
     private var lastSearchedText = ""
-
-    private var recentKey: String {
-        let pk = SessionManager.shared.currentPublicKey ?? ""
-        return "rosetta_recent_searches_\(pk)"
-    }
-    private static let maxRecent = 20
+    private var searchHandlerToken: UUID?
+    private var recentSearchesCancellable: AnyCancellable?
+    private let recentRepository = RecentSearchesRepository.shared
 
     // MARK: - Init
 
     init() {
-        loadRecentSearches()
+        configureRecentSearches()
         setupSearchCallback()
     }
 
     // MARK: - Search Logic
 
     func setSearchQuery(_ query: String) {
-
-        searchQuery = query
+        searchQuery = normalizeSearchInput(query)
         onSearchQueryChanged()
     }
 
@@ -86,7 +74,7 @@ final class SearchViewModel {
             }
 
             let connState = ProtocolManager.shared.connectionState
-            let hash = SessionManager.shared.privateKeyHash
+            let hash = SessionManager.shared.privateKeyHash ?? ProtocolManager.shared.privateHash
 
 
             guard connState == .authenticated, let hash else {
@@ -117,9 +105,18 @@ final class SearchViewModel {
     // MARK: - Search Callback
 
     private func setupSearchCallback() {
-        ProtocolManager.shared.onSearchResult = { [weak self] packet in
+        if let token = searchHandlerToken {
+            ProtocolManager.shared.removeSearchResultHandler(token)
+        }
+
+        searchHandlerToken = ProtocolManager.shared.addSearchResultHandler { [weak self] packet in
             DispatchQueue.main.async { [weak self] in
                 guard let self else { return }
+                guard !self.searchQuery.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty else {
+                    self.isSearching = false
+                    return
+                }
+
                 self.searchResults = packet.users
                 self.isSearching = false
 
@@ -136,55 +133,32 @@ final class SearchViewModel {
         }
     }
 
+    private func normalizeSearchInput(_ input: String) -> String {
+        input.replacingOccurrences(of: "@", with: "")
+            .trimmingCharacters(in: .whitespacesAndNewlines)
+    }
+
     // MARK: - Recent Searches
 
     func addToRecent(_ user: SearchUser) {
-        let recent = RecentSearch(
-            publicKey: user.publicKey,
-            title: user.title,
-            username: user.username,
-            lastSeenText: user.online == 1 ? "online" : "last seen recently"
-        )
-
-        // Remove duplicate if exists
-        recentSearches.removeAll { $0.publicKey == user.publicKey }
-        // Insert at top
-        recentSearches.insert(recent, at: 0)
-        // Keep max
-        if recentSearches.count > Self.maxRecent {
-            recentSearches = Array(recentSearches.prefix(Self.maxRecent))
-        }
-        saveRecentSearches()
+        recentRepository.add(user)
     }
 
     func removeRecentSearch(publicKey: String) {
-        recentSearches.removeAll { $0.publicKey == publicKey }
-        saveRecentSearches()
+        recentRepository.remove(publicKey: publicKey)
     }
 
     func clearRecentSearches() {
-        recentSearches = []
-        saveRecentSearches()
+        recentRepository.clearAll()
     }
 
-    private func loadRecentSearches() {
-        if let data = UserDefaults.standard.data(forKey: recentKey),
-           let list = try? JSONDecoder().decode([RecentSearch].self, from: data) {
-            recentSearches = list
-            return
-        }
-        // Migrate from old static key
-        let oldKey = "rosetta_recent_searches"
-        if let data = UserDefaults.standard.data(forKey: oldKey),
-           let list = try? JSONDecoder().decode([RecentSearch].self, from: data) {
-            recentSearches = list
-            saveRecentSearches()
-            UserDefaults.standard.removeObject(forKey: oldKey)
-        }
-    }
-
-    private func saveRecentSearches() {
-        guard let data = try? JSONEncoder().encode(recentSearches) else { return }
-        UserDefaults.standard.set(data, forKey: recentKey)
+    private func configureRecentSearches() {
+        recentRepository.setAccount(SessionManager.shared.currentPublicKey)
+        recentSearches = recentRepository.recentSearches
+        recentSearchesCancellable = recentRepository.$recentSearches
+            .receive(on: DispatchQueue.main)
+            .sink { [weak self] list in
+                self?.recentSearches = list
+            }
     }
 }

Rosetta/Features/MainTabView.swift

@@ -5,52 +5,159 @@ struct MainTabView: View {
     var onLogout: (() -> Void)?
     @State private var selectedTab: RosettaTab = .chats
     @State private var isChatSearchActive = false
+    @State private var tabSwipeState: TabBarSwipeState?
+    @State private var isChatListDetailPresented = false
+    @State private var isSearchDetailPresented = false
 
     var body: some View {
+        Group {
+            if #available(iOS 26.0, *) {
+                systemTabView
+            } else {
+                legacyTabView
+            }
+        }
+    }
+
+    @available(iOS 26.0, *)
+    private var systemTabView: some View {
+        TabView(selection: $selectedTab) {
+            ChatListView(
+                isSearchActive: $isChatSearchActive,
+                onChatDetailVisibilityChange: { isPresented in
+                    isChatListDetailPresented = isPresented
+                }
+            )
+                .tabItem {
+                    Label(RosettaTab.chats.label, systemImage: RosettaTab.chats.icon)
+                }
+                .tag(RosettaTab.chats)
+                .badgeIfNeeded(chatUnreadBadge)
+
+            SettingsView(onLogout: onLogout)
+                .tabItem {
+                    Label(RosettaTab.settings.label, systemImage: RosettaTab.settings.icon)
+                }
+                .tag(RosettaTab.settings)
+
+            SearchView(onChatDetailVisibilityChange: { isPresented in
+                isSearchDetailPresented = isPresented
+            })
+                .tabItem {
+                    Label(RosettaTab.search.label, systemImage: RosettaTab.search.icon)
+                }
+                .tag(RosettaTab.search)
+        }
+        .tint(RosettaColors.primaryBlue)
+    }
+
+    private var legacyTabView: some View {
         ZStack(alignment: .bottom) {
             RosettaColors.Adaptive.background
                 .ignoresSafeArea()
 
-            Group {
-                switch selectedTab {
-                case .chats:
-                    ChatListView(isSearchActive: $isChatSearchActive)
-                        .transition(.opacity)
-                case .settings:
-                    SettingsView(onLogout: onLogout)
-                        .transition(.opacity)
-                case .search:
-                    SearchView()
-                        .transition(.move(edge: .bottom).combined(with: .opacity))
-                }
+            GeometryReader { geometry in
+                tabPager(availableSize: geometry.size)
             }
-            .animation(.easeInOut(duration: 0.3), value: selectedTab)
 
-            if !isChatSearchActive {
+            if !isChatSearchActive && !isAnyChatDetailPresented {
                 RosettaTabBar(
                     selectedTab: selectedTab,
                     onTabSelected: { tab in
-                        withAnimation(.easeInOut(duration: 0.3)) {
+                        tabSwipeState = nil
+                        withAnimation(.spring(response: 0.34, dampingFraction: 0.82)) {
                             selectedTab = tab
                         }
                     },
+                    onSwipeStateChanged: { state in
+                        tabSwipeState = state
+                    },
                     badges: tabBadges
                 )
                 .ignoresSafeArea(.keyboard)
                 .transition(.move(edge: .bottom).combined(with: .opacity))
             }
         }
+        .onChange(of: isChatSearchActive) { _, isActive in
+            if isActive {
+                tabSwipeState = nil
+            }
+        }
+    }
+
+    private var currentPageIndex: CGFloat {
+        if let tabSwipeState {
+            return max(0, min(CGFloat(RosettaTab.interactionOrder.count - 1), tabSwipeState.fractionalIndex))
+        }
+        return CGFloat(selectedTab.interactionIndex)
+    }
+
+    @ViewBuilder
+    private func tabPager(availableSize: CGSize) -> some View {
+        let width = max(1, availableSize.width)
+        let totalWidth = width * CGFloat(RosettaTab.interactionOrder.count)
+
+        HStack(spacing: 0) {
+            ForEach(RosettaTab.interactionOrder, id: \.self) { tab in
+                tabView(for: tab)
+                    .frame(width: width, height: availableSize.height)
+            }
+        }
+        .frame(width: totalWidth, alignment: .leading)
+        .offset(x: -currentPageIndex * width)
+        .animation(tabSwipeState == nil ? .spring(response: 0.34, dampingFraction: 0.82) : nil, value: currentPageIndex)
+        .clipped()
+    }
+
+    @ViewBuilder
+    private func tabView(for tab: RosettaTab) -> some View {
+        switch tab {
+        case .chats:
+            ChatListView(
+                isSearchActive: $isChatSearchActive,
+                onChatDetailVisibilityChange: { isPresented in
+                    isChatListDetailPresented = isPresented
+                }
+            )
+        case .settings:
+            SettingsView(onLogout: onLogout)
+        case .search:
+            SearchView(onChatDetailVisibilityChange: { isPresented in
+                isSearchDetailPresented = isPresented
+            })
+        }
+    }
+
+    private var isAnyChatDetailPresented: Bool {
+        isChatListDetailPresented || isSearchDetailPresented
     }
 
     private var tabBadges: [TabBadge] {
-        var result: [TabBadge] = []
+        guard let chatUnreadBadge else {
+            return []
+        }
+        return [TabBadge(tab: .chats, text: chatUnreadBadge)]
+    }
+
+    private var chatUnreadBadge: String? {
         let unread = DialogRepository.shared.sortedDialogs
             .filter { !$0.isMuted }
             .reduce(0) { $0 + $1.unreadCount }
-        if unread > 0 {
-            result.append(TabBadge(tab: .chats, text: unread > 999 ? "\(unread / 1000)K" : "\(unread)"))
+        if unread <= 0 {
+            return nil
+        }
+        return unread > 999 ? "\(unread / 1000)K" : "\(unread)"
+    }
+}
+
+private extension View {
+    @ViewBuilder
+    func badgeIfNeeded(_ value: String?) -> some View {
+        if let value {
+            badge(value)
+        } else {
+            self
         }
-        return result
     }
 }
 

Rosetta/RosettaApp.swift

@@ -25,10 +25,7 @@ struct RosettaApp: App {
             UserDefaults.standard.set(true, forKey: "hasLaunchedBefore")
         }
 
-        // Preload Lottie animations early
-        Task.detached(priority: .userInitiated) {
-            LottieAnimationCache.shared.preload(OnboardingPages.all.map(\.animationName))
-        }
+        // Avoid heavy startup work on MainActor; Lottie assets load lazily on first use.
     }
 
     @AppStorage("hasCompletedOnboarding") private var hasCompletedOnboarding = false