feat: add optional server groups

CHANGELOG.md

@@ -1,21 +1,43 @@
 # Changelog
 
-## 26.1.6
+## Unreleased (2026-04-21)
+- Added optional sidebar groups for hosts, including group creation, editing, deletion, and host assignment.
+- Added grouped host ordering, group reordering via drag and drop, and clearer visual feedback while moving groups.
+- Improved group header styling to better distinguish groups and ungrouped hosts in the sidebar.
+- Fixed a launch crash in grouped builds caused by async ping tasks writing back to stale array indexes after the server list changed.
+
+## 26.1.9 (2026-04-19)
+- Reduced idle CPU usage and energy impact by changing the interval indicator from a permanent 60 FPS timer to a 1-second update cadence.
+- Reset the interval indicator cleanly when the refresh interval changes or when the indicator is hidden.
+
+## 26.1.8 (2026-04-19)
+- Fixed a crash in `PingService` caused by concurrent mutation of shared ping state from multiple async ping tasks.
+- Moved ping state tracking and reboot suppression windows into an actor so ping success/failure handling is serialized safely.
+
+## 26.1.7 (2026-04-19)
+- Added remote reboot support for hosts running KeyHelp API 2.14 or newer.
+- Added a dedicated `APIv2_14` client and mapped 2.14+ hosts to it instead of treating them as API 2.13.
+- Fixed the reboot request to call `/api/v2/server/reboot` with the required JSON confirmation payload.
+- Changed the reboot confirmation and result UI to non-blocking sheets/banner feedback so failures no longer trap the app in modal dialogs.
+- Improved API error messages by surfacing the server response body instead of only generic HTTP status codes.
+- Reduced expected reboot noise by suppressing ping checks for a short grace period after a reboot request.
+
+## 26.1.6 (2026-04-19)
 - Publish Gitea releases as stable by default instead of pre-releases.
 - Update the Homebrew tap automatically after each successful release by rewriting the cask version and DMG checksum, then pushing the tap repo.
 - Simplified the README for end users by adding clear install options and trimming internal release-engineering details.
 - Ignore the local `homebrew-tap/` checkout in the main app repository.
 
-## 26.1.3
+## 26.1.3 (2026-01-03)
 - Fixed version handling for changelogs.
 
-## 26.1.2 (2025-01-03)
+## 26.1.2 (2026-01-03)
 - Synced version.json to 26.1.2.
 
-## 26.1.1 (2025-01-03)
+## 26.1.1 (2026-01-03)
 - Fixed changelog extraction in publish script.
 
-## 26.1.0 (2025-01-03)
+## 26.1.0 (2026-01-03)
 - Auto-populate release description from CHANGELOG when publishing to Gitea.
 
 ## Prereleases

Sources/Model/API/ApiFactory.swift

@@ -10,6 +10,7 @@ import Foundation
 enum APIVersion: String, CaseIterable {
     case v2_12 = "2.12"
     case v2_13 = "2.13"
+    case v2_14 = "2.14"
     
     static func from(versionString: String) -> APIVersion? {
         if let version = APIVersion(rawValue: versionString) {
@@ -24,7 +25,8 @@ enum APIVersion: String, CaseIterable {
         
         switch (major, minor) {
         case (2, 12): return .v2_12
-        case (2, 13...): return .v2_13
+        case (2, 13): return .v2_13
+        case (2, 14...): return .v2_14
         default: return nil
         }
     }
@@ -36,6 +38,7 @@ protocol AnyServerAPI {
     func fetchMemoryData() async throws -> Any
     func fetchUtilizationData() async throws -> Any
     func fetchServerSummary(apiKey: String) async throws -> ServerInfo
+    func restartServer(apiKey: String) async throws
 }
 
 private struct AnyServerAPIWrapper<T: ServerAPIProtocol>: AnyServerAPI {
@@ -64,6 +67,10 @@ private struct AnyServerAPIWrapper<T: ServerAPIProtocol>: AnyServerAPI {
     func fetchServerSummary(apiKey: String) async throws -> ServerInfo {
         return try await wrapped.fetchServerSummary(apiKey: apiKey)
     }
+
+    func restartServer(apiKey: String) async throws {
+        try await wrapped.restartServer(apiKey: apiKey)
+    }
 }
 
 class APIFactory {
@@ -73,6 +80,8 @@ class APIFactory {
             return AnyServerAPIWrapper(APIv2_12(baseURL: baseURL))
         case .v2_13:
             return AnyServerAPIWrapper(APIv2_13(baseURL: baseURL))
+        case .v2_14:
+            return AnyServerAPIWrapper(APIv2_14(baseURL: baseURL))
         }
     }
     
@@ -104,7 +113,7 @@ class APIFactory {
             }
         }
 
-        return AnyServerAPIWrapper(APIv2_13(baseURL: baseURL))
+        return AnyServerAPIWrapper(APIv2_14(baseURL: baseURL))
     }
 }
 

Sources/Model/API/BaseAPI.swift

@@ -18,6 +18,7 @@ protocol ServerAPIProtocol {
     func fetchMemory() async throws -> MemoryType
     func fetchUtilization() async throws -> UtilizationType
     func fetchServerSummary(apiKey: String) async throws -> ServerInfo
+    func restartServer(apiKey: String) async throws
 }
 
 struct SystemInfo: Codable {
@@ -36,6 +37,15 @@ class BaseAPIClient {
     }
     
     func performRequest<T: Codable>(_ request: URLRequest, responseType: T.Type) async throws -> T {
+        let (data, _) = try await performDataRequest(request)
+        return try JSONDecoder().decode(T.self, from: data)
+    }
+
+    func performRequestWithoutBody(_ request: URLRequest) async throws {
+        _ = try await performDataRequest(request)
+    }
+
+    private func performDataRequest(_ request: URLRequest) async throws -> (Data, HTTPURLResponse) {
         let (data, response) = try await session.data(for: request)
         
         guard let httpResponse = response as? HTTPURLResponse else {
@@ -43,25 +53,61 @@ class BaseAPIClient {
         }
         
         guard 200...299 ~= httpResponse.statusCode else {
-            throw APIError.httpError(httpResponse.statusCode)
+            throw APIError.httpError(
+                httpResponse.statusCode,
+                BaseAPIClient.extractErrorMessage(from: data)
+            )
         }
         
-        return try JSONDecoder().decode(T.self, from: data)
+        return (data, httpResponse)
+    }
+
+    private static func extractErrorMessage(from data: Data) -> String? {
+        guard !data.isEmpty else { return nil }
+
+        if let envelope = try? JSONDecoder().decode(APIErrorEnvelope.self, from: data) {
+            let parts = [envelope.code, envelope.message]
+                .compactMap { $0?.trimmingCharacters(in: .whitespacesAndNewlines) }
+                .filter { !$0.isEmpty }
+
+            if !parts.isEmpty {
+                return parts.joined(separator: " ")
+            }
+        }
+
+        if let text = String(data: data, encoding: .utf8)?
+            .trimmingCharacters(in: .whitespacesAndNewlines),
+           !text.isEmpty {
+            return text
+        }
+
+        return nil
     }
 }
 
 enum APIError: Error, LocalizedError {
     case invalidURL
     case invalidResponse
-    case httpError(Int)
+    case httpError(Int, String?)
     case decodingError(Error)
+    case unsupportedFeature(String)
     
     var errorDescription: String? {
         switch self {
         case .invalidURL: return "Invalid URL"
         case .invalidResponse: return "Invalid response"
-        case .httpError(let code): return "HTTP Error: \(code)"
+        case .httpError(let code, let message):
+            if let message, !message.isEmpty {
+                return "HTTP Error: \(code)\n\(message)"
+            }
+            return "HTTP Error: \(code)"
         case .decodingError(let error): return "Decoding error: \(error.localizedDescription)"
+        case .unsupportedFeature(let feature): return "\(feature) is not supported by this host"
         }
     }
 }
+
+private struct APIErrorEnvelope: Decodable {
+    let code: String?
+    let message: String?
+}

Sources/Model/API/PingService.swift

@@ -2,9 +2,17 @@ import Foundation
 import UserNotifications
 
 enum PingService {
-    private static var previousPingStates: [String: Bool] = [:]
+    private static let stateStore = PingStateStore()
+
+    static func suppressChecks(for hostname: String, duration: TimeInterval) async {
+        await stateStore.suppressChecks(for: hostname, duration: duration)
+    }
 
     static func ping(hostname: String, apiKey: String, notificationsEnabled: Bool = true) async -> Bool {
+        if await stateStore.shouldSkipPing(for: hostname) {
+            return false
+        }
+
         guard let url = URL(string: "https://\(hostname)/api/v2/ping") else {
             print("❌ [PingService] Invalid URL for \(hostname)")
             return false
@@ -18,42 +26,32 @@ enum PingService {
         do {
             let (data, response) = try await URLSession.shared.data(for: request)
             if let httpResponse = response as? HTTPURLResponse, httpResponse.statusCode != 200 {
-                if let responseString = String(data: data, encoding: .utf8) {
-                    print("❌ [PingService] HTTP \(httpResponse.statusCode): \(responseString)")
-                }
-                handlePingFailure(for: hostname, notificationsEnabled: notificationsEnabled)
+                await handlePingFailure(for: hostname, notificationsEnabled: notificationsEnabled)
                 return false
             }
 
             if let result = try? JSONDecoder().decode([String: String].self, from: data), result["response"] == "pong" {
-                handlePingSuccess(for: hostname, notificationsEnabled: notificationsEnabled)
+                await handlePingSuccess(for: hostname, notificationsEnabled: notificationsEnabled)
                 return true
             } else {
-                handlePingFailure(for: hostname, notificationsEnabled: notificationsEnabled)
+                await handlePingFailure(for: hostname, notificationsEnabled: notificationsEnabled)
                 return false
             }
         } catch {
-            print("❌ [PingService] Error pinging \(hostname): \(error)")
-            handlePingFailure(for: hostname, notificationsEnabled: notificationsEnabled)
+            await handlePingFailure(for: hostname, notificationsEnabled: notificationsEnabled)
             return false
         }
     }
 
-    private static func handlePingSuccess(for hostname: String, notificationsEnabled: Bool) {
-        let wasPreviouslyDown = previousPingStates[hostname] == false
-        previousPingStates[hostname] = true
-
-        if wasPreviouslyDown && notificationsEnabled {
-            sendNotification(title: "Server Online", body: "\(hostname) is now online")
+    private static func handlePingSuccess(for hostname: String, notificationsEnabled: Bool) async {
+        if let notification = await stateStore.recordSuccess(for: hostname, notificationsEnabled: notificationsEnabled) {
+            sendNotification(title: notification.title, body: notification.body)
         }
     }
 
-    private static func handlePingFailure(for hostname: String, notificationsEnabled: Bool) {
-        let wasPreviouslyUp = previousPingStates[hostname] != false
-        previousPingStates[hostname] = false
-
-        if wasPreviouslyUp && notificationsEnabled {
-            sendNotification(title: "Server Offline", body: "\(hostname) is offline")
+    private static func handlePingFailure(for hostname: String, notificationsEnabled: Bool) async {
+        if let notification = await stateStore.recordFailure(for: hostname, notificationsEnabled: notificationsEnabled) {
+            sendNotification(title: notification.title, body: notification.body)
         }
     }
 
@@ -67,3 +65,55 @@ enum PingService {
         UNUserNotificationCenter.current().add(request)
     }
 }
+
+private actor PingStateStore {
+    private var previousPingStates: [String: Bool] = [:]
+    private var suppressedUntil: [String: Date] = [:]
+
+    func suppressChecks(for hostname: String, duration: TimeInterval) {
+        suppressedUntil[hostname] = Date().addingTimeInterval(duration)
+        previousPingStates[hostname] = false
+    }
+
+    func shouldSkipPing(for hostname: String) -> Bool {
+        if let suppressedUntil = suppressedUntil[hostname], suppressedUntil > Date() {
+            return true
+        }
+
+        suppressedUntil.removeValue(forKey: hostname)
+        return false
+    }
+
+    func recordSuccess(for hostname: String, notificationsEnabled: Bool) -> PingNotification? {
+        let wasPreviouslyDown = previousPingStates[hostname] == false
+        previousPingStates[hostname] = true
+
+        guard wasPreviouslyDown, notificationsEnabled else {
+            return nil
+        }
+
+        return PingNotification(
+            title: "Server Online",
+            body: "\(hostname) is now online"
+        )
+    }
+
+    func recordFailure(for hostname: String, notificationsEnabled: Bool) -> PingNotification? {
+        let wasPreviouslyUp = previousPingStates[hostname] != false
+        previousPingStates[hostname] = false
+
+        guard wasPreviouslyUp, notificationsEnabled else {
+            return nil
+        }
+
+        return PingNotification(
+            title: "Server Offline",
+            body: "\(hostname) is offline"
+        )
+    }
+}
+
+private struct PingNotification {
+    let title: String
+    let body: String
+}

Sources/Model/API/Server.swift

@@ -10,12 +10,14 @@ import Foundation
 struct Server: Identifiable, Codable, Hashable, Equatable {
     let id: UUID
     var hostname: String
+    var groupID: UUID?
     var info: ServerInfo?
     var pingable: Bool
 
-    init(id: UUID = UUID(), hostname: String, info: ServerInfo? = nil, pingable: Bool = false) {
+    init(id: UUID = UUID(), hostname: String, groupID: UUID? = nil, info: ServerInfo? = nil, pingable: Bool = false) {
         self.id = id
         self.hostname = hostname
+        self.groupID = groupID
         self.info = info
         self.pingable = pingable
     }
@@ -23,24 +25,26 @@ struct Server: Identifiable, Codable, Hashable, Equatable {
     // MARK: - Manual conformance
 
     static func == (lhs: Server, rhs: Server) -> Bool {
-        lhs.id == rhs.id && lhs.hostname == rhs.hostname && lhs.info == rhs.info && lhs.pingable == rhs.pingable
+        lhs.id == rhs.id && lhs.hostname == rhs.hostname && lhs.groupID == rhs.groupID && lhs.info == rhs.info && lhs.pingable == rhs.pingable
     }
 
     func hash(into hasher: inout Hasher) {
         hasher.combine(id)
         hasher.combine(hostname)
+        hasher.combine(groupID)
         hasher.combine(info)
         hasher.combine(pingable)
     }
 
     enum CodingKeys: String, CodingKey {
-        case id, hostname, info, pingable
+        case id, hostname, groupID, info, pingable
     }
 
     init(from decoder: Decoder) throws {
         let container = try decoder.container(keyedBy: CodingKeys.self)
         id = try container.decode(UUID.self, forKey: .id)
         hostname = try container.decode(String.self, forKey: .hostname)
+        groupID = try container.decodeIfPresent(UUID.self, forKey: .groupID)
         info = try container.decodeIfPresent(ServerInfo.self, forKey: .info)
         pingable = try container.decodeIfPresent(Bool.self, forKey: .pingable) ?? false
     }
@@ -49,6 +53,7 @@ struct Server: Identifiable, Codable, Hashable, Equatable {
         var container = encoder.container(keyedBy: CodingKeys.self)
         try container.encode(id, forKey: .id)
         try container.encode(hostname, forKey: .hostname)
+        try container.encodeIfPresent(groupID, forKey: .groupID)
         try container.encodeIfPresent(info, forKey: .info)
         try container.encode(pingable, forKey: .pingable)
     }

Sources/Model/API/ServerGroup.swift

@@ -0,0 +1,11 @@
+import Foundation
+
+struct ServerGroup: Identifiable, Codable, Hashable, Equatable {
+    let id: UUID
+    var name: String
+
+    init(id: UUID = UUID(), name: String) {
+        self.id = id
+        self.name = name
+    }
+}

Sources/Model/API/ServerInfo.swift

@@ -185,6 +185,10 @@ struct ServerInfo: Codable, Hashable, Equatable {
         ].filter { !$0.isEmpty }
         return components.isEmpty ? nil : components.joined(separator: " • ")
     }
+
+    var supportsRestartCommand: Bool {
+        ServerInfo.version(apiVersion, isAtLeast: "2.14")
+    }
 }
 
 // MARK: - Helpers & Sample Data
@@ -226,6 +230,27 @@ extension ServerInfo {
         return normalized
     }
 
+    private static func version(_ value: String, isAtLeast minimum: String) -> Bool {
+        let lhs = value
+            .split(separator: ".")
+            .compactMap { Int($0) }
+        let rhs = minimum
+            .split(separator: ".")
+            .compactMap { Int($0) }
+
+        let count = max(lhs.count, rhs.count)
+        for index in 0..<count {
+            let left = index < lhs.count ? lhs[index] : 0
+            let right = index < rhs.count ? rhs[index] : 0
+
+            if left != right {
+                return left > right
+            }
+        }
+
+        return true
+    }
+
     static let placeholder = ServerInfo(
         hostname: "preview.example.com",
         ipAddresses: ["192.168.1.1", "fe80::1"],

Sources/Model/API/Versions/APIv2_12.swift

@@ -181,7 +181,7 @@ class APIv2_12: BaseAPIClient, ServerAPIProtocol {
         }
 
         guard httpResponse.statusCode == 200 else {
-            throw APIError.httpError(httpResponse.statusCode)
+            throw APIError.httpError(httpResponse.statusCode, nil)
         }
 
         let decoder = JSONDecoder()
@@ -189,6 +189,10 @@ class APIv2_12: BaseAPIClient, ServerAPIProtocol {
         let envelope = try decoder.decode(ServerSummaryEnvelope.self, from: data)
         return envelope.toDomain()
     }
+
+    func restartServer(apiKey: String) async throws {
+        throw APIError.unsupportedFeature("Server reboot")
+    }
 }
 
 // MARK: - Server Summary Mapping

Sources/Model/API/Versions/APIv2_13.swift

@@ -181,7 +181,7 @@ class APIv2_13: BaseAPIClient, ServerAPIProtocol {
         }
 
         guard httpResponse.statusCode == 200 else {
-            throw APIError.httpError(httpResponse.statusCode)
+            throw APIError.httpError(httpResponse.statusCode, nil)
         }
 
         let decoder = JSONDecoder()
@@ -189,6 +189,10 @@ class APIv2_13: BaseAPIClient, ServerAPIProtocol {
         let envelope = try decoder.decode(ServerSummaryEnvelope.self, from: data)
         return envelope.toDomain()
     }
+
+    func restartServer(apiKey: String) async throws {
+        throw APIError.unsupportedFeature("Server reboot")
+    }
 }
 
 // MARK: - Server Summary Mapping

Sources/Model/API/Versions/APIv2_14.swift

@@ -0,0 +1,30 @@
+//
+//  APIv2_14.swift
+//  iKeyMon
+//
+//  Created by tracer on 19.04.26.
+//
+
+import Foundation
+
+class APIv2_14: APIv2_13 {
+    private enum Endpoint: String {
+        case serverReboot = "/api/v2/server/reboot"
+
+        func url(baseURL: URL) -> URL {
+            baseURL.appendingPathComponent(rawValue)
+        }
+    }
+
+    override func restartServer(apiKey: String) async throws {
+        var request = URLRequest(url: Endpoint.serverReboot.url(baseURL: baseURL))
+        request.httpMethod = "POST"
+        request.setValue(apiKey, forHTTPHeaderField: "X-API-KEY")
+        request.setValue("application/json", forHTTPHeaderField: "Accept")
+        request.setValue("application/json", forHTTPHeaderField: "Content-Type")
+        request.timeoutInterval = 30
+        request.httpBody = #"{"confirm":true}"#.data(using: .utf8)
+
+        try await performRequestWithoutBody(request)
+    }
+}

Sources/Views/GroupFormView.swift

@@ -0,0 +1,80 @@
+import SwiftUI
+
+struct GroupFormView: View {
+    enum Mode {
+        case add
+        case edit(ServerGroup)
+    }
+
+    let mode: Mode
+    @Binding var groups: [ServerGroup]
+    let onSave: () -> Void
+
+    @Environment(\.dismiss) private var dismiss
+    @State private var name: String
+
+    init(mode: Mode, groups: Binding<[ServerGroup]>, onSave: @escaping () -> Void) {
+        self.mode = mode
+        self._groups = groups
+        self.onSave = onSave
+
+        switch mode {
+        case .add:
+            self._name = State(initialValue: "")
+        case .edit(let group):
+            self._name = State(initialValue: group.name)
+        }
+    }
+
+    var body: some View {
+        VStack(alignment: .leading, spacing: 16) {
+            Text(title)
+                .font(.headline)
+
+            TextField("Group name", text: $name)
+                .textFieldStyle(.roundedBorder)
+
+            HStack {
+                Button("Cancel") {
+                    dismiss()
+                }
+
+                Spacer()
+
+                Button("Save") {
+                    save()
+                }
+                .disabled(trimmedName.isEmpty)
+            }
+        }
+        .padding()
+        .frame(width: 320)
+    }
+
+    private var title: String {
+        switch mode {
+        case .add:
+            return "Add Group"
+        case .edit:
+            return "Edit Group"
+        }
+    }
+
+    private var trimmedName: String {
+        name.trimmingCharacters(in: .whitespacesAndNewlines)
+    }
+
+    private func save() {
+        switch mode {
+        case .add:
+            groups.append(ServerGroup(name: trimmedName))
+        case .edit(let group):
+            if let index = groups.firstIndex(where: { $0.id == group.id }) {
+                groups[index].name = trimmedName
+            }
+        }
+
+        onSave()
+        dismiss()
+    }
+}

Sources/Views/MainView.swift

@@ -8,16 +8,23 @@
 import SwiftUI
 import Combine
 import UserNotifications
+import AppKit
+import UniformTypeIdentifiers
 
 struct MainView: View {
     
     private static let serverOrderKeyStatic = "serverOrder"
     private static let storedServersKeyStatic = "storedServers"
+    private static let storedGroupsKeyStatic = "storedGroups"
 
     @State var showAddServerSheet: Bool = false
+    @State private var showAddGroupSheet: Bool = false
     @State private var serverBeingEdited: Server?
+    @State private var groupBeingEdited: ServerGroup?
     @State private var serverToDelete: Server?
+    @State private var groupToDelete: ServerGroup?
     @State private var showDeleteConfirmation = false
+    @State private var showDeleteGroupConfirmation = false
     @State private var isFetchingInfo: Bool = false
     @AppStorage("pingInterval") private var pingInterval: Int = 10
     @AppStorage("refreshInterval") private var refreshInterval: Int = 60
@@ -26,12 +33,16 @@ struct MainView: View {
     @State private var refreshTimer: Timer.TimerPublisher?
     @State private var refreshSubscription: AnyCancellable?
     @State private var pingTimer: Timer?
+    @State private var restartingServerID: UUID?
+    @State private var draggedGroupID: UUID?
+    @State private var groupDropIndicator: GroupDropIndicator?
     @State private var lastRefreshInterval: Int?
     @State private var previousServiceStates: [String: String] = [:]
     private let serverOrderKey = MainView.serverOrderKeyStatic
-    private let storedServersKey = MainView.storedServersKeyStatic
+    private let storedGroupsKey = MainView.storedGroupsKeyStatic
 
     @State private var servers: [Server] = MainView.loadStoredServers()
+    @State private var groups: [ServerGroup] = MainView.loadStoredGroups()
 
 //    @State private var selectedServer: Server?
     @State private var selectedServerID: UUID?
@@ -39,73 +50,106 @@ struct MainView: View {
     var body: some View {
         var mainContent: some View {
             NavigationSplitView {
-                List(selection: $selectedServerID) {
-                ForEach(servers) { server in
-                    HStack {
-                        Image(systemName: "dot.circle.fill")
-                            .foregroundColor(server.pingable ? .green : .red)
-                        Text(server.hostname)
+                ZStack {
+                    SidebarMaterialView()
+
+                    List(selection: $selectedServerID) {
+                        sidebarContent
                     }
-                    .tag(server)
-                    .contextMenu {
-                        Button("Edit") {
-                            print("Editing:", server.hostname)
-                            serverBeingEdited = server
-                        }
-                        Divider()
-                        Button("Delete", role: .destructive) {
-                            serverToDelete = server
-                            showDeleteConfirmation = true
+                    .listStyle(.sidebar)
+                    .scrollContentBackground(.hidden)
+                    .background(Color.clear)
+                }
+                .background(
+                    RoundedRectangle(cornerRadius: 0, style: .continuous)
+                        .fill(.ultraThinMaterial)
+                )
+                .overlay(alignment: .trailing) {
+                    Rectangle()
+                        .fill(Color.white.opacity(0.08))
+                        .frame(width: 1)
+                }
+                .toolbar {
+                    ToolbarItem(placement: .primaryAction) {
+                        Menu {
+                            Button("Add Host") {
+                                showAddServerSheet = true
+                            }
+                            Button("Add Group") {
+                                showAddGroupSheet = true
+                            }
+                        } label: {
+                            Image(systemName: "plus")
                         }
+                        .help("Add Host or Group")
                     }
                 }
-                .onMove(perform: moveServer)
-            }
-            .toolbar {
-                ToolbarItem(placement: .primaryAction) {
-                    Button(action: { showAddServerSheet = true }) {
-                        Image(systemName: "plus")
+                .navigationTitle("Servers")
+                .onChange(of: selectedServerID) {
+                    if let selectedServerID {
+                        UserDefaults.standard.set(selectedServerID.uuidString, forKey: "selectedServerID")
+                        fetchServerInfo(for: selectedServerID)
                     }
-                    .help("Add Host")
                 }
-            }
-            .navigationTitle("Servers")
-            .onChange(of: selectedServerID) {
-                if let selectedServerID {
-                    UserDefaults.standard.set(selectedServerID.uuidString, forKey: "selectedServerID")
-                    fetchServerInfo(for: selectedServerID)
+            } detail: {
+                if let selectedServerID,
+                   let index = servers.firstIndex(where: { selectedServerID == $0.id }) {
+                    let serverID = servers[index].id
+                    ServerDetailView(
+                        server: $servers[index],
+                        isFetching: isFetchingInfo,
+                        canRestart: servers[index].info?.supportsRestartCommand == true,
+                        isRestarting: restartingServerID == serverID
+                    ) {
+                        await restartServer(for: serverID)
+                    }
+                } else {
+                    ContentUnavailableView("No Server Selected", systemImage: "server.rack")
                 }
             }
-        } detail: {
-            if let selectedServerID,
-               let index = servers.firstIndex(where: { selectedServerID == $0.id }) {
-                ServerDetailView(server: $servers[index], isFetching: isFetchingInfo)
-            } else {
-                ContentUnavailableView("No Server Selected", systemImage: "server.rack")
-            }
-            }
         }
         return mainContent
         .sheet(isPresented: $showAddServerSheet) {
             ServerFormView(
                 mode: .add,
                 servers: $servers,
+                groups: $groups,
                 dismiss: { showAddServerSheet = false }
             )
         }
+        .sheet(isPresented: $showAddGroupSheet) {
+            GroupFormView(mode: .add, groups: $groups) {
+                saveGroups()
+            }
+        }
         .sheet(item: $serverBeingEdited) { server in
             ServerFormView(
                 mode: .edit(server),
                 servers: $servers,
+                groups: $groups,
                 dismiss: { serverBeingEdited = nil }
             )
         }
+        .sheet(item: $groupBeingEdited) { group in
+            GroupFormView(mode: .edit(group), groups: $groups) {
+                saveGroups()
+            }
+        }
         .alert("Are you sure you want to delete this server?", isPresented: $showDeleteConfirmation, presenting: serverToDelete) { server in
             Button("Delete", role: .destructive) {
                 ServerFormView.delete(server: server, from: &servers)
+                saveServers()
             }
             Button("Cancel", role: .cancel) {}
         }
+        .alert("Are you sure you want to delete this group?", isPresented: $showDeleteGroupConfirmation, presenting: groupToDelete) { group in
+            Button("Delete", role: .destructive) {
+                deleteGroup(group)
+            }
+            Button("Cancel", role: .cancel) {}
+        } message: { group in
+            Text("Servers in \(group.name) will remain available and become ungrouped.")
+        }
         .onAppear {
             requestNotificationPermissions()
 
@@ -140,9 +184,146 @@ struct MainView: View {
                 setupRefreshTimer()
             }
         }
+        .onChange(of: groups) { _, _ in
+            saveGroups()
+        }
         .frame(minWidth: 800, minHeight: 450)
     }
 
+    @ViewBuilder
+    private var sidebarContent: some View {
+        if groups.isEmpty {
+            ForEach(servers) { server in
+                sidebarRow(for: server)
+            }
+            .onMove(perform: moveServer)
+        } else {
+            ForEach(groups) { group in
+                Section {
+                    ForEach(servers(in: group)) { server in
+                        sidebarRow(for: server)
+                    }
+                    .onMove { source, destination in
+                        moveServers(in: group.id, from: source, to: destination)
+                    }
+                } header: {
+                    groupHeader(for: group)
+                }
+            }
+
+            if !ungroupedServers.isEmpty {
+                Section {
+                    ForEach(ungroupedServers) { server in
+                        sidebarRow(for: server)
+                    }
+                    .onMove { source, destination in
+                        moveServers(in: nil, from: source, to: destination)
+                    }
+                } header: {
+                    sidebarSectionHeader("Ungrouped")
+                }
+            }
+        }
+    }
+
+    private func sidebarSectionHeader(_ title: String) -> some View {
+        HStack {
+            Text(title)
+                .font(.system(size: NSFont.systemFontSize + 1, weight: .bold))
+                .foregroundStyle(Color.accentColor)
+            Spacer(minLength: 0)
+        }
+        .padding(.vertical, 4)
+    }
+
+    private func sidebarRow(for server: Server) -> some View {
+        HStack {
+            Image(systemName: "dot.circle.fill")
+                .foregroundColor(server.pingable ? .green : .red)
+            Text(server.hostname)
+        }
+        .tag(server.id)
+        .contextMenu {
+            Button("Edit") {
+                print("Editing:", server.hostname)
+                serverBeingEdited = server
+            }
+            Divider()
+            Button("Delete", role: .destructive) {
+                serverToDelete = server
+                showDeleteConfirmation = true
+            }
+        }
+    }
+
+    private func groupHeader(for group: ServerGroup) -> some View {
+        let activePlacement = groupDropIndicator?.groupID == group.id ? groupDropIndicator?.placement : nil
+
+        return VStack(spacing: 0) {
+            if activePlacement == .before {
+                dropIndicator
+            }
+
+            sidebarSectionHeader(group.name)
+            .contentShape(Rectangle())
+            .background {
+                if activePlacement != nil {
+                    RoundedRectangle(cornerRadius: 6, style: .continuous)
+                        .fill(Color.accentColor.opacity(0.12))
+                }
+            }
+
+            if activePlacement == .after {
+                dropIndicator
+            }
+        }
+        .onDrag {
+            draggedGroupID = group.id
+            return NSItemProvider(object: group.id.uuidString as NSString)
+        }
+        .onDrop(
+            of: [UTType.text],
+            delegate: GroupDropDelegate(
+                targetGroup: group,
+                groups: $groups,
+                draggedGroupID: $draggedGroupID,
+                indicator: $groupDropIndicator
+            )
+        )
+        .contextMenu {
+            Button("Edit Group") {
+                groupBeingEdited = group
+            }
+            Button("Delete Group", role: .destructive) {
+                groupToDelete = group
+                showDeleteGroupConfirmation = true
+            }
+        }
+    }
+
+    private var dropIndicator: some View {
+        VStack(spacing: 4) {
+            Capsule()
+                .fill(Color.accentColor)
+                .frame(height: 3)
+                .shadow(color: Color.accentColor.opacity(0.25), radius: 1, y: 0)
+            Color.clear
+                .frame(height: 4)
+        }
+        .padding(.vertical, 2)
+    }
+
+    private var ungroupedServers: [Server] {
+        servers.filter { server in
+            guard let groupID = server.groupID else { return true }
+            return groups.contains(where: { $0.id == groupID }) == false
+        }
+    }
+
+    private func servers(in group: ServerGroup) -> [Server] {
+        servers.filter { $0.groupID == group.id }
+    }
+    
     private func fetchServerInfo(for id: UUID) {
         guard let server = servers.first(where: { $0.id == id }) else {
             print("❌ [MainView] fetchServerInfo: server not found for id \(id)")
@@ -214,6 +395,41 @@ struct MainView: View {
     
     private func moveServer(from source: IndexSet, to destination: Int) {
         servers.move(fromOffsets: source, toOffset: destination)
+        saveServers()
+        saveServerOrder()
+    }
+
+    private func moveServers(in groupID: UUID?, from source: IndexSet, to destination: Int) {
+        let matchingServers = servers.filter { server in
+            if let groupID {
+                return server.groupID == groupID
+            }
+            return server.groupID == nil || groups.contains(where: { $0.id == server.groupID }) == false
+        }
+
+        var reorderedServers = matchingServers
+        reorderedServers.move(fromOffsets: source, toOffset: destination)
+
+        let replacements = Dictionary(uniqueKeysWithValues: reorderedServers.map { ($0.id, $0) })
+        var reorderedIDs = reorderedServers.map(\.id)
+
+        servers = servers.map { server in
+            let belongsInSection: Bool
+            if let groupID {
+                belongsInSection = server.groupID == groupID
+            } else {
+                belongsInSection = server.groupID == nil || groups.contains(where: { $0.id == server.groupID }) == false
+            }
+
+            guard belongsInSection, let nextID = reorderedIDs.first else {
+                return server
+            }
+
+            reorderedIDs.removeFirst()
+            return replacements[nextID] ?? server
+        }
+
+        saveServers()
         saveServerOrder()
     }
     
@@ -223,21 +439,46 @@ struct MainView: View {
         print("💾 [MainView] Saved server order with \(ids.count) entries")
     }
 
+    private func saveServers() {
+        if let data = try? JSONEncoder().encode(servers) {
+            UserDefaults.standard.set(data, forKey: MainView.storedServersKeyStatic)
+        }
+    }
+
+    private func saveGroups() {
+        if let data = try? JSONEncoder().encode(groups) {
+            UserDefaults.standard.set(data, forKey: storedGroupsKey)
+        }
+    }
+
+    private func deleteGroup(_ group: ServerGroup) {
+        groups.removeAll { $0.id == group.id }
+        for index in servers.indices {
+            if servers[index].groupID == group.id {
+                servers[index].groupID = nil
+            }
+        }
+        saveGroups()
+        saveServers()
+    }
+    
     private struct PingResponse: Codable {
         let response: String
     }
         
     func pingAllServers() {
-        for (index, server) in servers.enumerated() {
+        let pingTargets = servers.map { ($0.id, $0.hostname) }
+
+        for (serverID, hostname) in pingTargets {
             Task {
-                let apiKey = KeychainHelper.loadApiKey(for: server.hostname)?.trimmingCharacters(in: .whitespacesAndNewlines) ?? ""
-                let pingable = await PingService.ping(hostname: server.hostname, apiKey: apiKey, notificationsEnabled: enableStatusNotifications)
+                let apiKey = KeychainHelper.loadApiKey(for: hostname)?.trimmingCharacters(in: .whitespacesAndNewlines) ?? ""
+                let pingable = await PingService.ping(hostname: hostname, apiKey: apiKey, notificationsEnabled: enableStatusNotifications)
                 await MainActor.run {
+                    guard let index = servers.firstIndex(where: { $0.id == serverID }) else {
+                        return
+                    }
                     servers[index].pingable = pingable
                 }
-                if !pingable {
-                    print("📶 [MainView] Ping \(server.hostname): offline")
-                }
             }
         }
     }
@@ -293,6 +534,20 @@ struct MainView: View {
         }
     }
 
+    private static func loadStoredGroups() -> [ServerGroup] {
+        let defaults = UserDefaults.standard
+        guard let data = defaults.data(forKey: storedGroupsKeyStatic) else {
+            return []
+        }
+
+        do {
+            return try JSONDecoder().decode([ServerGroup].self, from: data)
+        } catch {
+            print("❌ [MainView] Failed to decode stored groups: \(error)")
+            return []
+        }
+    }
+
     private func requestNotificationPermissions() {
         Task {
             do {
@@ -332,6 +587,171 @@ struct MainView: View {
         let request = UNNotificationRequest(identifier: UUID().uuidString, content: content, trigger: nil)
         UNUserNotificationCenter.current().add(request)
     }
+
+    private func restartServer(for id: UUID) async -> ServerActionFeedback {
+        guard let server = servers.first(where: { $0.id == id }) else {
+            return ServerActionFeedback(
+                title: "Reboot Failed",
+                message: "The selected server could not be found."
+            )
+        }
+
+        guard server.info?.supportsRestartCommand == true else {
+            return ServerActionFeedback(
+                title: "Reboot Unavailable",
+                message: "\(server.hostname) does not support remote reboot via the API."
+            )
+        }
+
+        guard let apiKey = KeychainHelper.loadApiKey(for: server.hostname)?.trimmingCharacters(in: .whitespacesAndNewlines),
+              !apiKey.isEmpty else {
+            return ServerActionFeedback(
+                title: "Reboot Failed",
+                message: "No API key is configured for \(server.hostname)."
+            )
+        }
+
+        guard let baseURL = URL(string: "https://\(server.hostname)") else {
+            return ServerActionFeedback(
+                title: "Reboot Failed",
+                message: "The server URL for \(server.hostname) is invalid."
+            )
+        }
+
+        restartingServerID = id
+        defer { restartingServerID = nil }
+
+        do {
+            let api: AnyServerAPI
+            if let versionString = server.info?.apiVersion,
+               let versionedAPI = APIFactory.createAPI(baseURL: baseURL, versionString: versionString) {
+                api = versionedAPI
+            } else {
+                api = try await APIFactory.detectAndCreateAPI(baseURL: baseURL, apiKey: apiKey)
+            }
+            try await api.restartServer(apiKey: apiKey)
+            await PingService.suppressChecks(for: server.hostname, duration: 90)
+
+            return ServerActionFeedback(
+                title: "Reboot Requested",
+                message: "The reboot command was sent to \(server.hostname). The host may become unavailable briefly while it restarts."
+            )
+        } catch let error as URLError where Self.isExpectedRestartDisconnect(error) {
+            await PingService.suppressChecks(for: server.hostname, duration: 90)
+            return ServerActionFeedback(
+                title: "Reboot Requested",
+                message: "The reboot command appears to have been accepted by \(server.hostname). The connection dropped while the host was going away, which is expected during a reboot."
+            )
+        } catch APIError.httpError(404, let message) {
+            return ServerActionFeedback(
+                title: "Reboot Unavailable",
+                message: message ?? "\(server.hostname) returned 404 for /api/v2/server/reboot."
+            )
+        } catch {
+            return ServerActionFeedback(
+                title: "Reboot Failed",
+                message: error.localizedDescription
+            )
+        }
+    }
+
+    private static func isExpectedRestartDisconnect(_ error: URLError) -> Bool {
+        switch error.code {
+        case .timedOut,
+             .cannotConnectToHost,
+             .networkConnectionLost,
+             .notConnectedToInternet,
+             .cannotFindHost,
+             .dnsLookupFailed:
+            return true
+        default:
+            return false
+        }
+    }
+}
+
+private struct SidebarMaterialView: NSViewRepresentable {
+    func makeNSView(context: Context) -> NSVisualEffectView {
+        let view = NSVisualEffectView()
+        view.blendingMode = .behindWindow
+        view.material = .sidebar
+        view.state = .active
+        return view
+    }
+
+    func updateNSView(_ nsView: NSVisualEffectView, context: Context) {
+        nsView.state = .active
+    }
+}
+
+private struct GroupDropDelegate: DropDelegate {
+    enum Placement {
+        case before
+        case after
+    }
+
+    let targetGroup: ServerGroup
+    @Binding var groups: [ServerGroup]
+    @Binding var draggedGroupID: UUID?
+    @Binding var indicator: GroupDropIndicator?
+
+    func dropEntered(info: DropInfo) {
+        updateIndicator(with: info)
+    }
+
+    func dropUpdated(info: DropInfo) -> DropProposal? {
+        updateIndicator(with: info)
+        return DropProposal(operation: .move)
+    }
+
+    func dropExited(info: DropInfo) {
+        indicator = nil
+    }
+
+    func performDrop(info: DropInfo) -> Bool {
+        defer {
+            draggedGroupID = nil
+            indicator = nil
+        }
+
+        guard
+            let draggedGroupID,
+            draggedGroupID != targetGroup.id,
+            let fromIndex = groups.firstIndex(where: { $0.id == draggedGroupID }),
+            let toIndex = groups.firstIndex(where: { $0.id == targetGroup.id })
+        else {
+            return false
+        }
+
+        let placement = placement(for: info)
+        let proposedIndex = placement == .after ? toIndex + 1 : toIndex
+        groups.move(
+            fromOffsets: IndexSet(integer: fromIndex),
+            toOffset: proposedIndex > fromIndex ? proposedIndex + 1 : proposedIndex
+        )
+        return true
+    }
+
+    private func updateIndicator(with info: DropInfo) {
+        guard let draggedGroupID, draggedGroupID != targetGroup.id else {
+            indicator = nil
+            return
+        }
+
+        indicator = GroupDropIndicator(
+            groupID: targetGroup.id,
+            placement: placement(for: info)
+        )
+    }
+
+    private func placement(for info: DropInfo) -> Placement {
+        info.location.y > 12 ? .after : .before
+    }
+}
+
+private struct GroupDropIndicator: Equatable {
+    let groupID: UUID
+    let placement: GroupDropDelegate.Placement
 }
 
 #Preview {

Sources/Views/ServerDetailView.swift

@@ -7,9 +7,18 @@
 
 import SwiftUI
 
+struct ServerActionFeedback: Identifiable {
+    let id = UUID()
+    let title: String
+    let message: String
+}
+
 struct ServerDetailView: View {
     @Binding var server: Server
     var isFetching: Bool
+    var canRestart: Bool = false
+    var isRestarting: Bool = false
+    var onRestart: (() async -> ServerActionFeedback)? = nil
     @AppStorage("showIntervalIndicator") private var showIntervalIndicator: Bool = true
     @AppStorage("refreshInterval") private var refreshInterval: Int = 60
 
@@ -18,7 +27,9 @@ struct ServerDetailView: View {
     }
 
     @State private var progress: Double = 0
-    let timer = Timer.publish(every: 1.0 / 60.0, on: .main, in: .common).autoconnect()
+    @State private var showRestartSheet = false
+    @State private var restartFeedback: ServerActionFeedback?
+    private let indicatorTimer = Timer.publish(every: 1, on: .main, in: .common).autoconnect()
     
     var body: some View {
         VStack(spacing: 0) {
@@ -33,7 +44,13 @@ struct ServerDetailView: View {
                 VStack(spacing: 0) {
                     Spacer().frame(height: 6)
                     TabView {
-                        GeneralView(server: resolvedBinding)
+                        GeneralView(
+                            server: resolvedBinding,
+                            canRestart: canRestart,
+                            isRestarting: isRestarting
+                        ) {
+                            showRestartSheet = true
+                        }
                             .tabItem {
                                 Text("General").unredacted()
                             }
@@ -57,13 +74,51 @@ struct ServerDetailView: View {
             }
             .padding(0)
         }
-        .onReceive(timer) { _ in
+        .overlay(alignment: .bottomTrailing) {
+            if let feedback = restartFeedback {
+                RestartFeedbackBanner(
+                    feedback: feedback,
+                    onDismiss: {
+                        restartFeedback = nil
+                    }
+                )
+                .padding()
+            }
+        }
+        .onReceive(indicatorTimer) { _ in
             guard showIntervalIndicator else { return }
-            withAnimation(.linear(duration: 1.0 / 60.0)) {
-                progress += 1.0 / (Double(refreshInterval) * 60.0)
+            withAnimation(.linear(duration: 1)) {
+                progress += 1.0 / Double(refreshInterval)
                 if progress >= 1 { progress = 0 }
             }
         }
+        .onChange(of: refreshInterval) { _, _ in
+            progress = 0
+        }
+        .onChange(of: showIntervalIndicator) { _, isVisible in
+            if !isVisible {
+                progress = 0
+            }
+        }
+        .sheet(isPresented: $showRestartSheet) {
+            RestartConfirmationSheet(
+                hostname: server.hostname,
+                isRestarting: isRestarting,
+                onCancel: {
+                    showRestartSheet = false
+                },
+                onConfirm: {
+                    guard let onRestart else { return }
+                    showRestartSheet = false
+                    Task {
+                        let feedback = await onRestart()
+                        await MainActor.run {
+                            restartFeedback = feedback
+                        }
+                    }
+                }
+            )
+        }
     }
     
     private var resolvedBinding: Binding<Server> {
@@ -81,7 +136,8 @@ struct ServerDetailView: View {
 #Preview {
     ServerDetailView(
         server: .constant(Server(id: UUID(), hostname: "preview.example.com", info: ServerInfo.placeholder)),
-        isFetching: false
+        isFetching: false,
+        canRestart: true
     )
 }
 
@@ -97,3 +153,67 @@ private struct LoadingBadge: View {
         .background(.ultraThinMaterial, in: Capsule())
     }
 }
+
+private struct RestartConfirmationSheet: View {
+    let hostname: String
+    let isRestarting: Bool
+    let onCancel: () -> Void
+    let onConfirm: () -> Void
+
+    var body: some View {
+        VStack(alignment: .leading, spacing: 16) {
+            Text("Reboot this server?")
+                .font(.title3.weight(.semibold))
+
+            Text("This will send a reboot command to \(hostname).")
+                .foregroundColor(.secondary)
+
+            HStack {
+                Spacer()
+
+                Button("Cancel") {
+                    onCancel()
+                }
+                .keyboardShortcut(.cancelAction)
+                .disabled(isRestarting)
+
+                Button("Reboot", role: .destructive) {
+                    onConfirm()
+                }
+                .keyboardShortcut(.defaultAction)
+                .disabled(isRestarting)
+            }
+        }
+        .padding(24)
+        .frame(width: 420)
+    }
+}
+
+private struct RestartFeedbackBanner: View {
+    let feedback: ServerActionFeedback
+    let onDismiss: () -> Void
+
+    var body: some View {
+        VStack(alignment: .leading, spacing: 12) {
+            Text(feedback.title)
+                .font(.headline)
+
+            Text(feedback.message)
+                .font(.subheadline)
+                .foregroundColor(.secondary)
+
+            HStack {
+                Spacer()
+
+                Button("OK") {
+                    onDismiss()
+                }
+                .keyboardShortcut(.defaultAction)
+            }
+        }
+        .frame(maxWidth: 360, alignment: .leading)
+        .padding(24)
+        .background(.ultraThinMaterial, in: RoundedRectangle(cornerRadius: 16, style: .continuous))
+        .shadow(radius: 12)
+    }
+}

Sources/Views/ServerFormView.swift

@@ -16,9 +16,11 @@ struct ServerFormView: View {
     var mode: Mode
     
     @Binding var servers: [Server]
+    @Binding var groups: [ServerGroup]
 
     @State private var hostname: String
     @State private var apiKey: String
+    @State private var selectedGroupID: UUID?
     @State private var connectionOK: Bool = false
     @State private var testingConnection: Bool = false
     @State private var connectionError: String = ""
@@ -29,25 +31,30 @@ struct ServerFormView: View {
     init(
         mode: Mode,
         servers: Binding<[Server]>,
+        groups: Binding<[ServerGroup]>,
         dismiss: @escaping () -> Void
     ) {
         self.mode = mode
         self._servers = servers
+        self._groups = groups
                 
         switch mode {
         case .add:
             self._hostname = State(initialValue: "")
             self._apiKey = State(initialValue: "")
+            self._selectedGroupID = State(initialValue: nil)
         case .edit(let server):
             self._hostname = State(initialValue: server.hostname)
             self._apiKey = State(initialValue: KeychainHelper.loadApiKey(for: server.hostname) ?? "")
+            self._selectedGroupID = State(initialValue: server.groupID)
+            self._connectionOK = State(initialValue: true)
         }
 
     }
 
     var body: some View {
         VStack {
-            Text("Edit Server")
+            Text(modeTitle)
                 .font(.headline)
 
             TextField("Hostname", text: $hostname)
@@ -57,6 +64,14 @@ struct ServerFormView: View {
             SecureField("API Key", text: $apiKey)
                 .textFieldStyle(RoundedBorderTextFieldStyle())
 
+            Picker("Group", selection: $selectedGroupID) {
+                Text("No Group").tag(nil as UUID?)
+                ForEach(groups) { group in
+                    Text(group.name).tag(Optional(group.id))
+                }
+            }
+            .pickerStyle(.menu)
+
             if !connectionError.isEmpty {
                 Text(connectionError)
                     .foregroundColor(.red)
@@ -77,8 +92,6 @@ struct ServerFormView: View {
 
                 Button("Save") {
                     saveServer()
-                    updateServer()
-                    saveServers()
                     dismiss()
                 }
                 .disabled(hostname.isEmpty || apiKey.isEmpty || !connectionOK)
@@ -93,6 +106,8 @@ struct ServerFormView: View {
                 print("serve \(server)")
                 hostname = server.hostname
                 apiKey = KeychainHelper.loadApiKey(for: server.hostname) ?? ""
+                selectedGroupID = server.groupID
+                connectionOK = true
                 print("💡 Loaded server: \(hostname)")
             }
         }
@@ -205,40 +220,22 @@ struct ServerFormView: View {
         switch mode {
         case .add:
             print("adding server")
-            let newServer = Server(hostname: trimmedHost)
+            let newServer = Server(hostname: trimmedHost, groupID: selectedGroupID)
             servers.append(newServer)
             KeychainHelper.saveApiKey(trimmedKey, for: trimmedHost)
-            saveServers()
         case .edit(let oldServer):
             if let index = servers.firstIndex(where: { $0.id == oldServer.id }) {
                 let oldHostname = servers[index].hostname
                 servers[index].hostname = trimmedHost
+                servers[index].groupID = selectedGroupID
                 if oldHostname != trimmedHost {
                     KeychainHelper.deleteApiKey(for: oldHostname)
                 }
                 KeychainHelper.saveApiKey(trimmedKey, for: trimmedHost)
             }
         }
-    }
 
-    private func updateServer() {
-        print ("in edit server")
-        guard case let .edit(server) = mode else {
-            return
-        }
-        
-        if let index = servers.firstIndex(where: { $0.id == server.id }) {
-            // Only replace hostname if changed
-            let oldHostname = servers[index].hostname
-            servers[index].hostname = hostname
-
-            // Update Keychain
-            if oldHostname != hostname {
-                KeychainHelper.deleteApiKey(for: oldHostname)
-            }
-            KeychainHelper.saveApiKey(apiKey, for: hostname)
-            saveServers()
-        }
+        saveServers()
     }
     
     private func saveServers() {
@@ -265,6 +262,9 @@ struct ServerFormView: View {
         servers: .constant([
             Server(hostname: "example.com")
         ]),
+        groups: .constant([
+            ServerGroup(name: "Production")
+        ]),
         dismiss: {}
     )
 }

Sources/Views/Tabs/GeneralView.swift

@@ -9,6 +9,9 @@ import SwiftUI
 
 struct GeneralView: View {
     @Binding var server: Server
+    var canRestart: Bool = false
+    var isRestarting: Bool = false
+    var onRestart: (() -> Void)? = nil
     
     var body: some View {
         GeometryReader { geometry in
@@ -117,6 +120,33 @@ struct GeneralView: View {
                             monospaced: true
                         )
                     }
+
+                    if canRestart, let onRestart {
+                        TableRowView(showDivider: false) {
+                            Text("Actions")
+                        } value: {
+                            VStack(alignment: .leading, spacing: 8) {
+                                Button(role: .destructive) {
+                                    onRestart()
+                                } label: {
+                                    if isRestarting {
+                                        HStack(spacing: 8) {
+                                            ProgressView()
+                                                .controlSize(.small)
+                                            Text("Rebooting…")
+                                        }
+                                    } else {
+                                        Label("Reboot Server", systemImage: "arrow.clockwise.circle")
+                                    }
+                                }
+                                .disabled(isRestarting)
+
+                                Text("Sends a reboot command to the selected host.")
+                                    .font(.caption)
+                                    .foregroundColor(.secondary)
+                            }
+                        }
+                    }
                 }
                 .padding()
                 .frame(minHeight: geometry.size.height, alignment: .top)
@@ -132,7 +162,7 @@ struct GeneralView: View {
         @State var previewServer = Server(hostname: "example.com", info: .placeholder)
 
         var body: some View {
-            GeneralView(server: $previewServer)
+            GeneralView(server: $previewServer, canRestart: true)
         }
     }
 

Sparkle/appcast.xml

@@ -3,28 +3,28 @@
     <channel>
         <title>iKeyMon</title>
         <item>
-            <title>26.1.6</title>
-            <pubDate>Sun, 19 Apr 2026 15:26:19 +0200</pubDate>
-            <sparkle:version>175</sparkle:version>
-            <sparkle:shortVersionString>26.1.6</sparkle:shortVersionString>
+            <title>26.1.9</title>
+            <pubDate>Sun, 19 Apr 2026 23:04:07 +0200</pubDate>
+            <sparkle:version>181</sparkle:version>
+            <sparkle:shortVersionString>26.1.9</sparkle:shortVersionString>
             <sparkle:minimumSystemVersion>15.2</sparkle:minimumSystemVersion>
-            <enclosure url="https://git.24unix.net/tracer/iKeyMon/releases/download/v26.1.6/iKeyMon-26.1.6.zip" length="3063130" type="application/octet-stream" sparkle:edSignature="QPy3zm31ZTXE9grlj7Ul6kEG2t0veODEBjJ/qADM8A88lLJ8V9L4WhNnD8wmM7Urh1O6eZKl1qrCLTk0oo3WBA=="/>
+            <enclosure url="https://git.24unix.net/tracer/iKeyMon/releases/download/v26.1.9/iKeyMon-26.1.9.zip" length="3109488" type="application/octet-stream" sparkle:edSignature="ZV96uUMdYC/X90H3G10FMzmZHKUEWpe1geSe/5IBJ7EOCUmx7Mz352i6VMWumFnCtDD4jHo173W9eySUX9KvDA=="/>
         </item>
         <item>
-            <title>26.1.5</title>
-            <pubDate>Sun, 19 Apr 2026 12:09:33 +0200</pubDate>
-            <sparkle:version>173</sparkle:version>
-            <sparkle:shortVersionString>26.1.5</sparkle:shortVersionString>
+            <title>26.1.8</title>
+            <pubDate>Sun, 19 Apr 2026 22:50:15 +0200</pubDate>
+            <sparkle:version>179</sparkle:version>
+            <sparkle:shortVersionString>26.1.8</sparkle:shortVersionString>
             <sparkle:minimumSystemVersion>15.2</sparkle:minimumSystemVersion>
-            <enclosure url="https://git.24unix.net/tracer/iKeyMon/releases/download/v26.1.5/iKeyMon-26.1.5.zip" length="3065231" type="application/octet-stream" sparkle:edSignature="HVV7iZ4eyJC1VMh2q4GUoAESZnk4HoFU00QlA9qM4X4dJAT5oBEVB55m4wuF4u9iVFAeohkB0vleLlV39mxrBA=="/>
+            <enclosure url="https://git.24unix.net/tracer/iKeyMon/releases/download/v26.1.8/iKeyMon-26.1.8.zip" length="3108005" type="application/octet-stream" sparkle:edSignature="OyoweSuRk5kusKUlqKQudZjrHkw5UPrLkix+ccpKphO1en2XdtQZa61hnA6HwcHM302jb+YlvN8n9f2Zkr9GBg=="/>
         </item>
         <item>
-            <title>26.1.3</title>
-            <pubDate>Sun, 19 Apr 2026 11:53:25 +0200</pubDate>
-            <sparkle:version>170</sparkle:version>
-            <sparkle:shortVersionString>26.1.4</sparkle:shortVersionString>
+            <title>26.1.7</title>
+            <pubDate>Sun, 19 Apr 2026 16:54:42 +0200</pubDate>
+            <sparkle:version>177</sparkle:version>
+            <sparkle:shortVersionString>26.1.7</sparkle:shortVersionString>
             <sparkle:minimumSystemVersion>15.2</sparkle:minimumSystemVersion>
-            <enclosure url="https://git.24unix.net/tracer/iKeyMon/releases/download/v26.1.4/iKeyMon-26.1.4.zip" length="3065263" type="application/octet-stream" sparkle:edSignature="kDxHy5KsxeCYz3N4aIEiZAFnqz6lLg4dHCLG6FL+j37xEpFmZM0lfHL2A15Jg936GeE+iGf6WrQJFInhHAvGDg=="/>
+            <enclosure url="https://git.24unix.net/tracer/iKeyMon/releases/download/v26.1.7/iKeyMon-26.1.7.zip" length="3106520" type="application/octet-stream" sparkle:edSignature="xuNlxCsTtVgroriFU7fphcfHxAEC8cpd6tHnHMXknJ2jvKm27ShQMqjSW2jdqNAz0a0kNtPM8HwTL+e6nvUyCQ=="/>
         </item>
     </channel>
 </rss>

iKeyMon.xcodeproj/project.pbxproj

@@ -322,7 +322,7 @@
 				CODE_SIGN_ENTITLEMENTS = iKeyMon.entitlements;
 				CODE_SIGN_STYLE = Automatic;
 				COMBINE_HIDPI_IMAGES = YES;
-				CURRENT_PROJECT_VERSION = 175;
+				CURRENT_PROJECT_VERSION = 181;
 				DEVELOPMENT_ASSET_PATHS = "\"Preview Content\"";
 				DEVELOPMENT_TEAM = Q5486ZVAFT;
 				ENABLE_HARDENED_RUNTIME = YES;
@@ -337,7 +337,7 @@
 					"$(inherited)",
 					"@executable_path/../Frameworks",
 				);
-				MARKETING_VERSION = 26.1.6;
+				MARKETING_VERSION = 26.1.9;
 				PRODUCT_BUNDLE_IDENTIFIER = net.24unix.iKeyMon;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_EMIT_LOC_STRINGS = YES;
@@ -353,7 +353,7 @@
 				CODE_SIGN_ENTITLEMENTS = iKeyMon.entitlements;
 				CODE_SIGN_STYLE = Automatic;
 				COMBINE_HIDPI_IMAGES = YES;
-				CURRENT_PROJECT_VERSION = 175;
+				CURRENT_PROJECT_VERSION = 181;
 				DEVELOPMENT_ASSET_PATHS = "\"Preview Content\"";
 				DEVELOPMENT_TEAM = Q5486ZVAFT;
 				ENABLE_HARDENED_RUNTIME = YES;
@@ -368,7 +368,7 @@
 					"$(inherited)",
 					"@executable_path/../Frameworks",
 				);
-				MARKETING_VERSION = 26.1.6;
+				MARKETING_VERSION = 26.1.9;
 				PRODUCT_BUNDLE_IDENTIFIER = net.24unix.iKeyMon;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_EMIT_LOC_STRINGS = YES;

version.json

@@ -1,3 +1,3 @@
 {
-  "marketing_version": "26.1.6"
+  "marketing_version": "26.1.9"
 }