feat(ios): refine adaptive theme and unified controls

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

@@ -14,14 +14,18 @@ struct FleetView: View {
             ScrollView {
                 LazyVStack(spacing: 12) {
                     searchField
-                    if let errorMessage = model.errorMessage {
-                        AIStatusBanner(errorMessage, tint: AITheme.danger, systemImage: "exclamationmark.triangle")
-                    }
+                if let errorMessage = model.errorMessage {
+                    AIStatusBanner(
+                        errorMessage,
+                        tint: AITheme.danger,
+                        systemImage: "exclamationmark.triangle"
+                    )
+                }
                     if model.selectionMode {
                         selectionBar
                     }
                     if model.isLoading && model.rows.isEmpty {
-                        AILoadingCard("正在同步实例")
+                        AILoadingCard("正在同步实例数据")
                     }
                     if model.rows.isEmpty && !model.isLoading {
                         AICard {
@@ -58,6 +62,7 @@ struct FleetView: View {
                         Label("批量选择", systemImage: "checklist")
                     }
                     .buttonStyle(AIButtonStyle(kind: .secondary, size: .regular, fillsWidth: true))
+                    .frame(maxWidth: .infinity)
 
                     Button {
                         model.showingForm = true
@@ -65,6 +70,7 @@ struct FleetView: View {
                         Label("添加实例", systemImage: "plus")
                     }
                     .buttonStyle(AIButtonStyle(kind: .primary, size: .regular, fillsWidth: true))
+                    .frame(maxWidth: .infinity)
                 }
             }
         }
@@ -163,6 +169,9 @@ struct FleetView: View {
                         Text(row.instance.name)
                             .font(.headline)
                             .foregroundStyle(AITheme.ink)
+                            .lineLimit(1)
+                            .truncationMode(.middle)
+                            .layoutPriority(1)
                         Spacer()
                         AITag(row.status.label, tint: statusColor(row.status))
                     }

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

@@ -39,17 +39,13 @@ struct InstanceFormView: View {
             .aiBottomActionBar {
                 HStack(spacing: 10) {
                     Button("取消") { dismiss() }
-                        .buttonStyle(
-                            AIButtonStyle(
-                                kind: .secondary,
-                                size: .regular,
-                                fixedWidth: AITheme.footerSecondaryButtonWidth
-                            )
-                        )
+                        .buttonStyle(AIButtonStyle(kind: .secondary, size: .regular, fillsWidth: true))
+                        .frame(maxWidth: .infinity)
 
                     Button("保存实例") { save() }
                         .buttonStyle(AIButtonStyle(kind: .primary, size: .regular, fillsWidth: true))
                         .disabled(!canSave)
+                        .frame(maxWidth: .infinity)
                 }
             }
         }
@@ -62,9 +58,7 @@ struct InstanceFormView: View {
         secure: Bool = false
     ) -> some View {
         VStack(alignment: .leading, spacing: 6) {
-            Text(title)
-                .font(.subheadline.weight(.semibold))
-                .foregroundStyle(AITheme.ink)
+            AIFieldLabel(title)
             if secure {
                 SecureField(placeholder, text: text)
                     .textFieldStyle(AIFieldStyle())