feat: Introduce system accounts and verification badges

- Added SystemAccounts enum to manage system account keys and titles.
- Refactored Dialog model to replace isVerified with verified level.
- Implemented effective verification logic for UI display in Dialog.
- Updated DialogRepository to handle user verification levels.
- Enhanced ProtocolManager and SessionManager to log user info with verification.
- Modified AuthCoordinator to support back navigation to unlock screen.
- Improved UnlockView and WelcomeView with new account creation flow.
- Added VerifiedBadge component to visually represent account verification levels.
- Updated ChatListView and SearchView to display verification badges for users.
- Cleaned up debug print statements across various components.

Rosetta/Core/Network/Protocol/ProtocolManager.swift

@@ -176,22 +176,25 @@ final class ProtocolManager: @unchecked Sendable {
     // MARK: - Packet Handling
 
     private func handleIncomingData(_ data: Data) {
-        print("[Protocol] Incoming data: \(data.count) bytes, first bytes: \(data.prefix(min(8, data.count)).map { String(format: "%02x", $0) }.joined(separator: " "))")
+        #if DEBUG
+        if data.count >= 2 {
+            let peekStream = Stream(data: data)
+            let rawId = peekStream.readInt16()
+            Self.logger.debug("📥 Incoming packet 0x\(String(rawId, radix: 16)), size: \(data.count)")
+        }
+        #endif
 
         guard let (packetId, packet) = PacketRegistry.decode(from: data) else {
-            // Try to read the packet ID manually to see what it is
+            #if DEBUG
             if data.count >= 2 {
                 let stream = Stream(data: data)
                 let rawId = stream.readInt16()
-                print("[Protocol] Unknown packet ID: 0x\(String(rawId, radix: 16)) (\(rawId)), data size: \(data.count)")
-            } else {
-                print("[Protocol] Packet too small: \(data.count) bytes")
+                Self.logger.debug("Unknown packet ID: 0x\(String(rawId, radix: 16)), size: \(data.count)")
             }
+            #endif
             return
         }
 
-        print("[Protocol] Received packet 0x\(String(packetId, radix: 16)) (\(type(of: packet)))")
-
         switch packetId {
         case 0x00:
             if let p = packet as? PacketHandshake {
@@ -199,17 +202,15 @@ final class ProtocolManager: @unchecked Sendable {
             }
         case 0x01:
             if let p = packet as? PacketUserInfo {
-                print("[Protocol] UserInfo received: username='\(p.username)', title='\(p.title)'")
                 onUserInfoReceived?(p)
             }
         case 0x02:
             if let p = packet as? PacketResult {
-                let code = ResultCode(rawValue: p.resultCode)
-                print("[Protocol] Result received: code=\(p.resultCode) (\(code.map { "\($0)" } ?? "unknown"))")
+                let _ = ResultCode(rawValue: p.resultCode)
             }
         case 0x03:
             if let p = packet as? PacketSearch {
-                print("[Protocol] Search result received: \(p.users.count) users")
+                Self.logger.debug("📥 Search result: \(p.users.count) users, callback=\(self.onSearchResult != nil)")
                 onSearchResult?(p)
             }
         case 0x05: