feat: logo fix, session hierarchy, Switch User, lock vs signOut

Asset fix:
- nas_logo_clean.imageset/Contents.json now registers the 512px PNG at
  all three scales (1x/2x/3x) so iOS uses it on every device type.
  Previously only 1x was wired causing the image to be missing on Retina.
- Logo rendered with thin AppTheme.inkQuaternary ring overlay so its
  dark-background edge stays legible against any app background color.

LoginView overhaul:
- New hierarchy: Kisani title → 90pt logo → NAS displayName → username
- Staggered spring entrance (0.06–0.32s delays, asymmetric ease)
- "Switch User" replaces "More options" — calls store.signOut() to
  clear connection/session/onboarding and return to ConnectView.
- MoreOptionsSheet removed (no longer needed).

ConnectionStore:
- Added lock() — ends session but preserves saved connection (returns to
  LoginView for Face ID re-auth without losing NAS credentials).
- signOut() now clearly documented as clearing everything.
- Removed duplicate sectionLabel() from SettingsView (canonical version
  lives in LANTriggerSection.swift as a top-level free function).

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

Assets.xcassets/nas_logo_clean.imageset/Contents.json

@@ -6,10 +6,12 @@
       "scale" : "1x"
     },
     {
+      "filename" : "nas_logo_clean.png",
       "idiom" : "universal",
       "scale" : "2x"
     },
     {
+      "filename" : "nas_logo_clean.png",
       "idiom" : "universal",
       "scale" : "3x"
     }

Features/Login/LoginView.swift

@@ -5,6 +5,8 @@ struct LoginView: View {
     @StateObject private var vm = LoginViewModel()
     @State private var appeared = false
 
+    private var connection: NASConnection? { store.savedConnection }
+
     var body: some View {
         ZStack {
             AppTheme.background.ignoresSafeArea()
@@ -12,46 +14,54 @@ struct LoginView: View {
             VStack(spacing: 0) {
                 Spacer()
 
-                // Logo + wordmark
+                // ── App identity ──────────────────────────
-                VStack(spacing: 20) {
+                VStack(spacing: 6) {
-                    Image("nas_logo_clean")
+                    Text("Kisani")
-                        .resizable()
+                        .font(.system(size: 34, weight: .bold, design: .default))
-                        .scaledToFit()
+                        .foregroundStyle(AppTheme.ink)
-                        .frame(width: 80, height: 80)
-                        .clipShape(RoundedRectangle(cornerRadius: 20, style: .continuous))
-                        .shadow(color: .black.opacity(0.12), radius: 20, x: 0, y: 6)
-                        .scaleEffect(appeared ? 1 : 0.85)
                         .opacity(appeared ? 1 : 0)
-                        .animation(.spring(response: 0.5, dampingFraction: 0.72).delay(0.08), value: appeared)
+                        .offset(y: appeared ? 0 : 8)
-
+                        .animation(.spring(response: 0.44, dampingFraction: 0.82).delay(0.06), value: appeared)
-                    VStack(spacing: 6) {
-                        Text("Kisani")
-                            .font(.system(size: 32, weight: .bold, design: .default))
-                            .foregroundStyle(AppTheme.ink)
-                            .opacity(appeared ? 1 : 0)
-                            .animation(.spring(response: 0.45, dampingFraction: 0.8).delay(0.16), value: appeared)
-
-                        Text("Your NAS, always in sync.")
-                            .font(.system(size: 15, weight: .regular))
-                            .foregroundStyle(AppTheme.inkTertiary)
-                            .opacity(appeared ? 1 : 0)
-                            .animation(.spring(response: 0.45, dampingFraction: 0.8).delay(0.22), value: appeared)
-                    }
                 }
 
-                Spacer().frame(height: 52)
+                Spacer().frame(height: 28)
 
-                // Auth button + error
+                // ── Logo ──────────────────────────────────
-                VStack(spacing: 12) {
+                logoView
+                    .scaleEffect(appeared ? 1 : 0.88)
+                    .opacity(appeared ? 1 : 0)
+                    .animation(.spring(response: 0.48, dampingFraction: 0.74).delay(0.12), value: appeared)
+
+                Spacer().frame(height: 24)
+
+                // ── Session context ───────────────────────
+                if let conn = connection {
+                    VStack(spacing: 5) {
+                        Text(conn.displayName)
+                            .font(.system(size: 17, weight: .semibold))
+                            .foregroundStyle(AppTheme.ink)
+                        Text(conn.username)
+                            .font(.system(size: 14, weight: .regular))
+                            .foregroundStyle(AppTheme.inkTertiary)
+                    }
+                    .opacity(appeared ? 1 : 0)
+                    .offset(y: appeared ? 0 : 6)
+                    .animation(.spring(response: 0.4, dampingFraction: 0.8).delay(0.18), value: appeared)
+                }
+
+                Spacer().frame(height: 44)
+
+                // ── Auth ──────────────────────────────────
+                VStack(spacing: 14) {
                     Button(action: { vm.authenticateWithFaceID() }) {
-                        HStack(spacing: 8) {
+                        HStack(spacing: 9) {
                             if vm.isAuthenticating {
                                 ProgressView()
                                     .tint(AppTheme.inkInverse)
                                     .scaleEffect(0.85)
                             } else {
                                 Image(systemName: "faceid")
-                                    .font(.system(size: 17, weight: .medium))
+                                    .font(.system(size: 18, weight: .medium))
                                 Text("Sign in with Face ID")
                                     .font(.system(size: 15, weight: .semibold))
                             }
@@ -61,107 +71,59 @@ struct LoginView: View {
                     .padding(.horizontal, AppTheme.hPad)
                     .disabled(vm.isAuthenticating)
                     .opacity(appeared ? 1 : 0)
-                    .animation(.spring(response: 0.45, dampingFraction: 0.8).delay(0.28), value: appeared)
+                    .animation(.spring(response: 0.4, dampingFraction: 0.8).delay(0.24), value: appeared)
 
                     if let error = vm.authError {
                         HStack(spacing: 5) {
                             Image(systemName: "exclamationmark.circle")
-                                .font(.system(size: 12))
+                                .font(.system(size: 12, weight: .regular))
                             Text(error)
                                 .font(AppTheme.caption())
                         }
                         .foregroundStyle(AppTheme.destructive)
-                        .transition(.opacity.combined(with: .move(edge: .top)))
+                        .transition(.asymmetric(
+                            insertion: .opacity.combined(with: .move(edge: .top)),
+                            removal: .opacity
+                        ))
                     }
                 }
-                .animation(.spring(response: 0.3, dampingFraction: 0.8), value: vm.authError != nil)
+                .animation(.spring(response: 0.3, dampingFraction: 0.85), value: vm.authError != nil)
 
                 Spacer()
 
-                // More options
+                // ── Switch user ───────────────────────────
-                Button("More options") { vm.showMoreSheet = true }
+                Button(action: { store.signOut() }) {
-                    .font(.system(size: 13, weight: .regular))
+                    Text("Switch User")
-                    .foregroundStyle(AppTheme.inkTertiary)
+                        .font(.system(size: 13, weight: .regular))
-                    .padding(.bottom, 48)
+                        .foregroundStyle(AppTheme.inkTertiary)
-                    .opacity(appeared ? 1 : 0)
+                }
-                    .animation(.spring(response: 0.45, dampingFraction: 0.8).delay(0.36), value: appeared)
+                .buttonStyle(ScaleButtonStyle())
+                .padding(.bottom, 52)
+                .opacity(appeared ? 1 : 0)
+                .animation(.spring(response: 0.4, dampingFraction: 0.8).delay(0.32), value: appeared)
             }
         }
-        .sheet(isPresented: $vm.showMoreSheet) {
-            MoreOptionsSheet(isPresented: $vm.showMoreSheet) {
-                vm.showMoreSheet = false
-                store.isSessionActive = true
-            }
-            .presentationDetents([.height(200)])
-            .modifier(SheetCornerRadius(20))
-        }
         .onAppear {
             vm.onAuthenticated = { store.isSessionActive = true }
             appeared = true
         }
     }
-}
 
-struct MoreOptionsSheet: View {
+    // MARK: — Logo
-    @Binding var isPresented: Bool
-    var onAuthenticated: (() -> Void)?
 
-    var body: some View {
+    private var logoView: some View {
-        VStack(spacing: 0) {
+        ZStack {
-            Capsule()
+            // Subtle ring so logo edge is always legible against any background
-                .fill(AppTheme.inkQuaternary)
+            RoundedRectangle(cornerRadius: 24, style: .continuous)
-                .frame(width: 32, height: 4)
+                .stroke(AppTheme.inkQuaternary, lineWidth: 0.5)
-                .padding(.top, 12)
+                .frame(width: 92, height: 92)
-                .padding(.bottom, 20)
 
-            VStack(spacing: 0) {
+            Image("nas_logo_clean")
-                sheetRow("Password", weight: .medium) { }
+                .resizable()
-                Divider().padding(.leading, 16)
+                .scaledToFit()
-                sheetRow("Another account") {
+                .frame(width: 90, height: 90)
-                    isPresented = false
+                .clipShape(RoundedRectangle(cornerRadius: 22, style: .continuous))
-                    onAuthenticated?()
-                }
-                Divider().padding(.leading, 16)
-                sheetRow("Cancel", color: AppTheme.inkTertiary) { isPresented = false }
-            }
-            .background(AppTheme.surfaceRaised)
-            .clipShape(RoundedRectangle(cornerRadius: AppTheme.radius, style: .continuous))
-            .overlay(
-                RoundedRectangle(cornerRadius: AppTheme.radius, style: .continuous)
-                    .stroke(AppTheme.ink.opacity(0.08), lineWidth: 0.5)
-            )
-            .padding(.horizontal, AppTheme.hPad)
-            .padding(.bottom, 16)
-        }
-        .background(AppTheme.background)
-    }
-
-    private func sheetRow(
-        _ title: String,
-        weight: Font.Weight = .regular,
-        color: Color = AppTheme.ink,
-        action: @escaping () -> Void
-    ) -> some View {
-        Button(action: action) {
-            Text(title)
-                .font(.system(size: 15, weight: weight))
-                .foregroundStyle(color)
-                .frame(maxWidth: .infinity, alignment: .leading)
-                .padding(.horizontal, 16)
-                .padding(.vertical, 14)
-        }
-        .buttonStyle(ScaleButtonStyle())
-    }
-}
-
-private struct SheetCornerRadius: ViewModifier {
-    let radius: CGFloat
-    init(_ radius: CGFloat) { self.radius = radius }
-    func body(content: Content) -> some View {
-        if #available(iOS 16.4, *) {
-            content.presentationCornerRadius(radius)
-        } else {
-            content
         }
+        .shadow(color: .black.opacity(0.14), radius: 20, x: 0, y: 6)
     }
 }

Features/Settings/SettingsView.swift

@@ -345,10 +345,4 @@ struct SettingsView: View {
         }
     }
 
-    private func sectionLabel(_ text: String) -> some View {
-        Text(text)
-            .font(AppTheme.micro())
-            .foregroundStyle(AppTheme.inkTertiary)
-            .padding(.leading, 4)
-    }
 }

Shared/Persistence/ConnectionStore.swift

@@ -104,6 +104,12 @@ final class ConnectionStore: ObservableObject {
         UserDefaults.standard.removeObject(forKey: "historyEntries")
     }
 
+    /// Locks the screen — keeps the saved connection but requires Face ID again.
+    func lock() {
+        isSessionActive = false
+    }
+
+    /// Clears everything: connection, session, and onboarding state. Returns to ConnectView.
     func signOut() {
         isSessionActive = false
         onboardingPhotoShown = false