Исправление бесконечного рендер-цикла SearchView и поиск по публичному ключу

- SearchViewModel: заменён @Observable на ObservableObject + @Published
  (устранён infinite body loop SearchView → 99% CPU фриз после логина)
- SearchView: @State → @StateObject, RecentSection: @ObservedObject
- Добавлен клиентский поиск по публичному ключу (сервер ищет только по нику)
- ChatDetailView: убран @State на DialogRepository singleton
- ChatListView: замена closure на @Binding, убран DispatchQueue.main.async
- MainTabView: убран пустой onChange, замена closure на @Binding
- SettingsViewModel: конвертирован в ObservableObject
- Добавлены debug-принты для отладки рендер-циклов

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Rosetta/Features/Chats/ChatDetail/ChatDetailView.swift

@@ -6,10 +6,10 @@ struct ChatDetailView: View {
 
     @Environment(\.dismiss) private var dismiss
     @ObservedObject private var messageRepository = MessageRepository.shared
-    @State private var dialogRepository = DialogRepository.shared
 
     @State private var messageText = ""
     @State private var sendError: String?
+    @State private var isViewActive = false
     @FocusState private var isInputFocused: Bool
 
     private var currentPublicKey: String {
@@ -17,7 +17,7 @@ struct ChatDetailView: View {
     }
 
     private var dialog: Dialog? {
-        dialogRepository.dialogs[route.publicKey]
+        DialogRepository.shared.dialogs[route.publicKey]
     }
 
     private var messages: [ChatMessage] {
@@ -106,18 +106,21 @@ struct ChatDetailView: View {
             .toolbar { chatDetailToolbar }           // твой header тут
             .toolbar(.hidden, for: .tabBar)
             .task {
+                isViewActive = true
                 // Request user info (non-mutating, won't trigger list rebuild)
                 requestUserInfoIfNeeded()
                 // Delay ALL dialog mutations to let navigation transition complete.
                 // Without this, DialogRepository update rebuilds ChatListView's ForEach
                 // mid-navigation, recreating the NavigationLink and canceling the push.
                 try? await Task.sleep(for: .milliseconds(600))
+                guard isViewActive else { return }
                 activateDialog()
                 markDialogAsRead()
                 // Subscribe to opponent's online status (Android parity) — only after settled
                 SessionManager.shared.subscribeToOnlineStatus(publicKey: route.publicKey)
             }
             .onDisappear {
+                isViewActive = false
                 messageRepository.setDialogActive(route.publicKey, isActive: false)
             }
         }
@@ -306,16 +309,20 @@ private extension ChatDetailView {
                     try? await Task.sleep(for: .milliseconds(120))
                     scrollToBottom(proxy: proxy, animated: false)
                 }
-                markDialogAsRead()
+                // markDialogAsRead() removed — already handled in .task with 600ms delay.
+                // Calling it here immediately mutates DialogRepository, triggering
+                // ChatListView ForEach rebuild mid-navigation and cancelling the push.
             }
             .onChange(of: messages.count) { _, _ in
                 scrollToBottom(proxy: proxy, animated: true)
-                markDialogAsRead()
+                if isViewActive {
+                    markDialogAsRead()
+                }
             }
             .onChange(of: isInputFocused) { _, focused in
                 guard focused else { return }
                 Task { @MainActor in
-                    try? await Task.sleep(for: .milliseconds(80))
+                    try? await Task.sleep(nanoseconds: 80_000_000)
                     scrollToBottom(proxy: proxy, animated: true)
                 }
             }
@@ -331,28 +338,33 @@ private extension ChatDetailView {
         let outgoing = message.isFromMe(myPublicKey: currentPublicKey)
         let messageText = message.text.isEmpty ? " " : message.text
 
-        // Text determines bubble width; timestamp overlays at bottom-trailing.
-        // minWidth ensures the bubble is wide enough for the timestamp row.
+        // Telegram-style compact bubble: inline time+status at bottom-trailing.
+        // Right padding reserves space for the timestamp overlay (64pt outgoing, 48pt incoming).
         Text(messageText)
-            .font(.system(size: 16, weight: .regular))
+            .font(.system(size: 17, weight: .regular))
+            .tracking(-0.43)
             .foregroundStyle(outgoing ? Color.white : RosettaColors.Adaptive.text)
             .multilineTextAlignment(.leading)
             .lineSpacing(0)
             .fixedSize(horizontal: false, vertical: true)
-            .padding(.horizontal, 14)
-            .padding(.top, 8)
-            .padding(.bottom, 22)
-            .frame(minWidth: outgoing ? 90 : 70, alignment: .leading)
+            .padding(.leading, 11)
+            .padding(.trailing, outgoing ? 64 : 48)
+            .padding(.vertical, 5)
+            .frame(minWidth: outgoing ? 86 : 66, alignment: .leading)
             .overlay(alignment: .bottomTrailing) {
-                HStack(spacing: 4) {
+                HStack(spacing: 3) {
                     Text(messageTime(message.timestamp))
-                        .font(.system(size: 12, weight: .regular))
-                        .foregroundStyle(outgoing ? Color.white.opacity(0.72) : RosettaColors.Adaptive.textSecondary)
+                        .font(.system(size: 11, weight: .regular))
+                        .foregroundStyle(
+                            outgoing
+                                ? Color.white.opacity(0.55)
+                                : RosettaColors.Adaptive.textSecondary.opacity(0.6)
+                        )
 
                     if outgoing { deliveryIndicator(message.deliveryStatus) }
                 }
-                .padding(.trailing, 14)
-                .padding(.bottom, 6)
+                .padding(.trailing, 11)
+                .padding(.bottom, 5)
             }
             .background { bubbleBackground(outgoing: outgoing, isTailVisible: isTailVisible) }
             .frame(maxWidth: maxBubbleWidth, alignment: outgoing ? .trailing : .leading)
@@ -529,8 +541,8 @@ private extension ChatDetailView {
 
     @ViewBuilder
     func bubbleBackground(outgoing: Bool, isTailVisible: Bool) -> some View {
-        let nearRadius: CGFloat = isTailVisible ? 6 : 17
-        let bubbleRadius: CGFloat = 17
+        let nearRadius: CGFloat = isTailVisible ? 8 : 18
+        let bubbleRadius: CGFloat = 18
         let fill = outgoing ? RosettaColors.figmaBlue : incomingBubbleFill
         if #available(iOS 17.0, *) {
             UnevenRoundedRectangle(
@@ -561,34 +573,21 @@ private extension ChatDetailView {
         strokeOpacity: Double = 0.18,
         strokeColor: Color = RosettaColors.Adaptive.border
     ) -> some View {
-        if #available(iOS 26.0, *) {
-            switch shape {
-            case .capsule:
-                Capsule().fill(.clear).glassEffect(.regular, in: .capsule)
-            case .circle:
-                Circle().fill(.clear).glassEffect(.regular, in: .circle)
-            case let .rounded(radius):
-                RoundedRectangle(cornerRadius: radius, style: .continuous)
-                    .fill(.clear)
-                    .glassEffect(.regular, in: RoundedRectangle(cornerRadius: radius, style: .continuous))
-            }
-        } else {
-            let border = strokeColor.opacity(max(0.28, strokeOpacity))
-            switch shape {
-            case .capsule:
-                Capsule()
-                    .fill(.ultraThinMaterial)
-                    .overlay(Capsule().stroke(border, lineWidth: 0.8))
-            case .circle:
-                Circle()
-                    .fill(.ultraThinMaterial)
-                    .overlay(Circle().stroke(border, lineWidth: 0.8))
-            case let .rounded(radius):
-                let rounded = RoundedRectangle(cornerRadius: radius, style: .continuous)
-                rounded
-                    .fill(.ultraThinMaterial)
-                    .overlay(rounded.stroke(border, lineWidth: 0.8))
-            }
+        let border = strokeColor.opacity(max(0.28, strokeOpacity))
+        switch shape {
+        case .capsule:
+            Capsule()
+                .fill(RosettaColors.adaptive(light: Color(hex: 0xF2F2F7), dark: Color(hex: 0x1C1C1E)))
+                .overlay(Capsule().stroke(border, lineWidth: 0.8))
+        case .circle:
+            Circle()
+                .fill(RosettaColors.adaptive(light: Color(hex: 0xF2F2F7), dark: Color(hex: 0x1C1C1E)))
+                .overlay(Circle().stroke(border, lineWidth: 0.8))
+        case let .rounded(radius):
+            let rounded = RoundedRectangle(cornerRadius: radius, style: .continuous)
+            rounded
+                .fill(RosettaColors.adaptive(light: Color(hex: 0xF2F2F7), dark: Color(hex: 0x1C1C1E)))
+                .overlay(rounded.stroke(border, lineWidth: 0.8))
         }
     }
 
@@ -625,12 +624,12 @@ private extension ChatDetailView {
                 Image(systemName: "checkmark").offset(x: 3)
                 Image(systemName: "checkmark")
             }
-            .font(.system(size: 10.5, weight: .semibold))
+            .font(.system(size: 9.5, weight: .semibold))
             .foregroundStyle(deliveryTint(status))
-            .frame(width: 13, alignment: .trailing)
+            .frame(width: 12, alignment: .trailing)
         default:
             Image(systemName: deliveryIcon(status))
-                .font(.system(size: 11, weight: .semibold))
+                .font(.system(size: 10, weight: .semibold))
                 .foregroundStyle(deliveryTint(status))
         }
     }
@@ -670,7 +669,7 @@ private extension ChatDetailView {
     func activateDialog() {
         // Only update existing dialogs; don't create ghost entries from search.
         // New dialogs are created when messages are sent/received (SessionManager).
-        if dialogRepository.dialogs[route.publicKey] != nil {
+        if DialogRepository.shared.dialogs[route.publicKey] != nil {
             DialogRepository.shared.ensureDialog(
                 opponentKey: route.publicKey,
                 title: route.title,