fix: use AppStorage values for ping and refresh intervals

Make the ping and refresh intervals from preferences actually control
the timer frequencies. Settings now properly update timers when changed.
- Read pingInterval and refreshInterval from AppStorage
- Recreate timers when settings change
- Setup timers on app appearance with correct intervals

Sources/Views/MainView.swift

@@ -6,6 +6,7 @@
 //
 
 import SwiftUI
+import Combine
 
 struct MainView: View {
     
@@ -17,7 +18,10 @@ struct MainView: View {
     @State private var serverToDelete: Server?
     @State private var showDeleteConfirmation = false
     @State private var isFetchingInfo: Bool = false
-    @State private var refreshTimer = Timer.publish(every: 60, on: .main, in: .common).autoconnect()
+    @AppStorage("pingInterval") private var pingInterval: Int = 10
+    @AppStorage("refreshInterval") private var refreshInterval: Int = 60
+    @State private var refreshTimer: Timer.TimerPublisher?
+    @State private var refreshSubscription: AnyCancellable?
     @State private var pingTimer: Timer?
     private let serverOrderKey = MainView.serverOrderKeyStatic
     private let storedServersKey = MainView.storedServersKeyStatic
@@ -97,11 +101,6 @@ struct MainView: View {
             }
             Button("Cancel", role: .cancel) {}
         }
-        .onReceive(refreshTimer) { _ in
-            for server in servers {
-                fetchServerInfo(for: server.id)
-            }
-        }
         .onAppear {
             let initialID: UUID?
             if let storedID = UserDefaults.standard.string(forKey: "selectedServerID"),
@@ -124,10 +123,13 @@ struct MainView: View {
                     await prefetchOtherServers(activeID: initialID)
                 }
             }
-            pingAllServers()
-            pingTimer = Timer.scheduledTimer(withTimeInterval: 10.0, repeats: true) { _ in
-                pingAllServers()
-            }
+            setupTimers()
+        }
+        .onChange(of: pingInterval) { _, _ in
+            setupPingTimer()
+        }
+        .onChange(of: refreshInterval) { _, _ in
+            setupRefreshTimer()
         }
         .frame(minWidth: 800, minHeight: 450)
     }
@@ -230,6 +232,29 @@ struct MainView: View {
         }
     }
 
+    private func setupTimers() {
+        setupPingTimer()
+        setupRefreshTimer()
+    }
+
+    private func setupPingTimer() {
+        pingTimer?.invalidate()
+        pingAllServers()
+        pingTimer = Timer.scheduledTimer(withTimeInterval: Double(pingInterval), repeats: true) { _ in
+            pingAllServers()
+        }
+    }
+
+    private func setupRefreshTimer() {
+        refreshSubscription = nil
+        refreshTimer = Timer.publish(every: Double(refreshInterval), on: .main, in: .common)
+        refreshSubscription = refreshTimer?.autoconnect().sink { _ in
+            for server in servers {
+                fetchServerInfo(for: server.id)
+            }
+        }
+    }
+
     private static func loadStoredServers() -> [Server] {
         let defaults = UserDefaults.standard
         guard let data = defaults.data(forKey: storedServersKeyStatic) else {