fix(ios): improve fleet overview and app identity

- Show stable group health in a fixed 2x2 metric grid
- Add link-chain state to fleet cards and parse hardware/control/SIM/cellular
- Replace the wrapped icon with a full-bleed app icon
- Bump the IPA build number

apps/ios/Sources/MultiSimAdmin/Features/Fleet/InstanceFormView.swift

@@ -3,13 +3,24 @@ import SwiftUI
 struct InstanceFormView: View {
   @Environment(\.dismiss) private var dismiss
   @ObservedObject var model: FleetViewModel
+  let instance: Instance?
   @State private var name = ""
   @State private var originText = ""
   @State private var tagsText = ""
   @State private var password = ""
+  @State private var selectedGroupId: UUID?
   @State private var validationMessage: String?
   @State private var isSaving = false
 
+  init(model: FleetViewModel, instance: Instance? = nil) {
+    self.model = model
+    self.instance = instance
+    _name = State(initialValue: instance?.name ?? "")
+    _originText = State(initialValue: instance?.origin.absoluteString ?? "")
+    _tagsText = State(initialValue: instance?.tags.joined(separator: ", ") ?? "")
+    _selectedGroupId = State(initialValue: instance?.groupId)
+  }
+
   private var canSave: Bool {
     !name.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty
       && !originText.trimmingCharacters(in: .whitespacesAndNewlines).isEmpty
@@ -24,7 +35,13 @@ struct InstanceFormView: View {
               field("名称", text: $name, placeholder: "Home Node")
               field("地址", text: $originText, placeholder: "http://192.168.1.10:3000")
               field("标签", text: $tagsText, placeholder: "home, primary")
-              field("实例密码", text: $password, placeholder: "可选，保存在本机沙盒", secure: true)
+              groupPicker
+              field(
+                "实例密码",
+                text: $password,
+                placeholder: instance == nil ? "可选，保存在本机沙盒" : "留空则不修改密码",
+                secure: true
+              )
             }
           }
           if let validationMessage {
@@ -56,13 +73,37 @@ struct InstanceFormView: View {
         }
       }
       .background(AITheme.canvas.ignoresSafeArea())
-      .navigationTitle("添加实例")
+      .navigationTitle(instance == nil ? "添加实例" : "编辑实例")
       #if os(iOS)
         .scrollDismissesKeyboard(.interactively)
       #endif
     }
   }
 
+  private var groupPicker: some View {
+    VStack(alignment: .leading, spacing: 8) {
+      HStack(spacing: 8) {
+        AIFieldLabel("分组")
+        Spacer()
+        Button {
+          model.showingGroupManager = true
+        } label: {
+          Label("管理", systemImage: "folder.badge.gearshape")
+        }
+        .buttonStyle(AIButtonStyle(kind: .secondary, size: .toolbarInline, fixedWidth: 72))
+      }
+      Picker("分组", selection: $selectedGroupId) {
+        Text("未分组").tag(UUID?.none)
+        ForEach(model.groups) { group in
+          Text(group.name).tag(UUID?.some(group.id))
+        }
+      }
+      .pickerStyle(.menu)
+      .aiSelectSurface()
+    }
+    .accessibilityElement(children: .contain)
+  }
+
   private func field(
     _ title: String,
     text: Binding<String>,
@@ -111,11 +152,16 @@ struct InstanceFormView: View {
       name: normalizedName,
       origin: origin,
       tags: tags,
+      groupId: selectedGroupId,
       password: password.isEmpty ? nil : password
     )
     Task {
       do {
-        try await model.add(input)
+        if let instance {
+          try await model.update(instance.id, input)
+        } else {
+          try await model.add(input)
+        }
       } catch {
         validationMessage = "保存失败，请检查地址是否重复。"
       }