fix(ios): clear private native state and apply upstream dark tokens

Discard editor drafts on account/server changes, obscure inactive sheets and clear loaded records even when vault erasure fails. Serialize local removal and distinguish dark tint from primary button fill. Swift format/parsing and sixteen portable tests pass; Apple SDK validation remains outstanding.

ios/Sources/NativeRootView.swift

@@ -2,6 +2,12 @@ import SwiftUI
 
 private enum NativeDesign {
     static let accent = Color(red: 108 / 255, green: 58 / 255, blue: 237 / 255)
+    static func tint(_ dark: Bool) -> Color {
+        dark ? Color(red: 167 / 255, green: 139 / 255, blue: 250 / 255) : accent
+    }
+    static func button(_ dark: Bool) -> Color {
+        dark ? Color(red: 124 / 255, green: 58 / 255, blue: 237 / 255) : accent
+    }
     static func background(_ dark: Bool) -> Color {
         dark
             ? Color(red: 25 / 255, green: 24 / 255, blue: 22 / 255)
@@ -39,8 +45,18 @@ struct NativeRootView: View {
                 NativeBrandMark().frame(width: 64, height: 64)
             }
         }
-        .tint(NativeDesign.accent)
+        .tint(NativeDesign.tint(scheme == .dark))
         .task { await store.restore() }
+        .onChange(of: store.user?.id) {
+            draft = nil
+            deletePath = nil
+            search = ""
+        }
+        .onChange(of: store.server) {
+            draft = nil
+            deletePath = nil
+            search = ""
+        }
         .sheet(item: $draft) { entry in
             NativeEditor(draft: entry, busy: store.busy, error: store.error) { body in
                 let path: String
@@ -139,7 +155,7 @@ struct NativeRootView: View {
                                 Image(systemName: page.symbol).font(.system(size: 21))
                                 Text(page.title).font(.system(size: 11))
                             }
-                            .foregroundStyle(store.page == page ? NativeDesign.accent : .secondary)
+                            .foregroundStyle(store.page == page ? NativeDesign.tint(scheme == .dark) : .secondary)
                             .frame(maxWidth: .infinity).padding(.vertical, 10)
                         }
                         .disabled(store.busy).accessibilityIdentifier("nav-\(page.rawValue)")
@@ -341,6 +357,7 @@ struct NativeRootView: View {
 }
 
 private struct NativeAuthenticationScreen: View {
+    @Environment(\.colorScheme) private var scheme
     @ObservedObject var store: NativeStore
     let forget: () -> Void
     @State private var address = ""
@@ -379,8 +396,10 @@ private struct NativeAuthenticationScreen: View {
                                 }
                                 invalidAddress = false
                                 Task { await store.connect(address) }
-                            }.buttonStyle(.borderedProminent).disabled(store.busy || address.isEmpty)
-                                .accessibilityIdentifier("connect")
+                            }.buttonStyle(.borderedProminent).tint(NativeDesign.button(scheme == .dark)).disabled(
+                                store.busy || address.isEmpty
+                            )
+                            .accessibilityIdentifier("connect")
                         } else if store.twoFactor {
                             TextField("Code oder Wiederherstellungscode", text: $code).textContentType(.oneTimeCode)
                                 .textFieldStyle(.roundedBorder)
@@ -388,7 +407,8 @@ private struct NativeAuthenticationScreen: View {
                                 let value = code
                                 code = ""
                                 Task { await store.verify(value) }
-                            }.buttonStyle(.borderedProminent).disabled(store.busy || code.isEmpty)
+                            }.buttonStyle(.borderedProminent).tint(NativeDesign.button(scheme == .dark)).disabled(
+                                store.busy || code.isEmpty)
                             Button("Zurück zur Anmeldung") { store.cancelTwoFactor() }.disabled(store.busy)
                         } else {
                             if store.setup { TextField("Anzeigename", text: $name).textFieldStyle(.roundedBorder) }
@@ -406,7 +426,7 @@ private struct NativeAuthenticationScreen: View {
                                     Task {
                                         await store.login(username: username, password: submitted, displayName: name)
                                     }
-                                }.buttonStyle(.borderedProminent).disabled(
+                                }.buttonStyle(.borderedProminent).tint(NativeDesign.button(scheme == .dark)).disabled(
                                     store.busy || username.isEmpty || password.isEmpty
                                 ).accessibilityIdentifier("login")
                             }
@@ -437,6 +457,8 @@ private struct NativeAuthenticationScreen: View {
 
 private struct NativeEditor: View {
     @Environment(\.dismiss) private var dismiss
+    @Environment(\.scenePhase) private var phase
+    @Environment(\.colorScheme) private var scheme
     @State var draft: NativeDraft
     let busy: Bool
     let error: String?
@@ -482,6 +504,14 @@ private struct NativeEditor: View {
                 }
             }
         }.interactiveDismissDisabled(busy)
+            .overlay {
+                if phase != .active {
+                    ZStack {
+                        NativeDesign.background(scheme == .dark).ignoresSafeArea()
+                        NativeBrandMark().frame(width: 64, height: 64)
+                    }
+                }
+            }
     }
 }