fix: dispose resource leaks in NetworkSharedState, TrayIconService, MemoryTestService

CHANGELOG.md

@@ -6,6 +6,16 @@ adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
 
+## [0.53.1] - 2026-05-14
+
+### Fixed
+- **Resource leak: NetworkSharedState** — dispose SKTypeface on LegendTextPaint
+  in Dispose() to release unmanaged SkiaSharp memory (LEAK-003).
+- **Resource leak: TrayIconService** — dispose icon resource stream after
+  creating System.Drawing.Icon to prevent stream leak (LEAK-006).
+- **Resource leak: MemoryTestService** — dispose Process returned by
+  Process.Start when launching mdsched.exe (LEAK-007).
+
 ## [0.53.0] - 2026-05-13
 
 ### Added

SysManager/SysManager/Services/MemoryTestService.cs

@@ -80,7 +80,7 @@ public bool ScheduleAtNextBoot()
             // mdsched.exe prompts interactively. Use the schedule flag to avoid UI.
             // On Win10/11, the easiest way without UI is the "bcdedit" toggle used
             // behind the scenes, but safest portable option is to launch mdsched.
-            Process.Start(new ProcessStartInfo
+            using var proc = Process.Start(new ProcessStartInfo
             {
                 FileName = "mdsched.exe",
                 UseShellExecute = true

SysManager/SysManager/Services/TrayIconService.cs

@@ -90,8 +90,10 @@ public static void HideWindow(Window window)
         try
         {
             var uri = new Uri("pack://application:,,,/Resources/app.ico", UriKind.Absolute);
-            var stream = Application.GetResourceStream(uri)?.Stream;
-            return stream != null ? new System.Drawing.Icon(stream) : null;
+            var streamInfo = Application.GetResourceStream(uri);
+            if (streamInfo?.Stream == null) return null;
+            using var stream = streamInfo.Stream;
+            return new System.Drawing.Icon(stream);
         }
         catch (System.IO.IOException ex)
         {

SysManager/SysManager/ViewModels/NetworkSharedState.cs

@@ -450,7 +450,7 @@
         Labeler = v => new DateTime((long)v).ToString("HH:mm:ss"),
         TextSize = 12,
         NamePaint = new SolidColorPaint(SKColor.Parse("A3ADBF")),
         LabelsPaint = new SolidColorPaint(SKColor.Parse("E6E9EE")) { FontFamily = "Segoe UI" },
         SeparatorsPaint = new SolidColorPaint(SKColor.Parse("2A3244").WithAlpha(80))
     };
 
@@ -459,8 +459,8 @@
         Name = name,
         MinLimit = 0,
         TextSize = 13,
         NamePaint = new SolidColorPaint(SKColor.Parse("E6E9EE")) { FontFamily = "Segoe UI" },
         LabelsPaint = new SolidColorPaint(SKColor.Parse("E6E9EE")) { FontFamily = "Segoe UI" },
         SeparatorsPaint = new SolidColorPaint(SKColor.Parse("2A3244").WithAlpha(80)) { StrokeThickness = 1 },
         Labeler = v => $"{v:F0} ms",
         NameTextSize = 14,
@@ -474,7 +474,7 @@
         MinStep = 1,
         TextSize = 12,
         NamePaint = new SolidColorPaint(SKColor.Parse("A3ADBF")),
         LabelsPaint = new SolidColorPaint(SKColor.Parse("E6E9EE")) { FontFamily = "Segoe UI" },
         SeparatorsPaint = new SolidColorPaint(SKColor.Parse("2A3244").WithAlpha(80))
     };
 
@@ -487,5 +487,8 @@
         TraceMonitor.Stop();
         TraceMonitor.Dispose();
         FlushTimer?.Stop();
+
+        // Dispose SKTypeface (unmanaged SkiaSharp memory) — LEAK-003
+        LegendTextPaint.SKTypeface?.Dispose();
     }
 }