fix: resolve last remaining analyzer findings (CA1001, CA1031, CA1515, CA1711, CA1822, CA1861)

src/LageBuch.App/Services/SerialAudioQueue.cs

@@ -1,4 +1,5 @@
 using System.Collections.Concurrent;
+using System.Diagnostics.CodeAnalysis;
 
 namespace LageBuch.App.Services;
 
@@ -11,7 +12,9 @@ namespace LageBuch.App.Services;
 /// audio player process that never exits), the queue moves on to the next item anyway so one
 /// stuck cue can't permanently silence later ones.
 /// </summary>
-public sealed class SerialAudioQueue
+[SuppressMessage("Design", "CA1001",
+    Justification = "App-lifetime singleton: its worker thread drains until process shutdown, so the owning BlockingCollection is intentionally never disposed.")]
+internal sealed class SerialAudioQueue
 {
     private readonly BlockingCollection<Action> _queue = new();
     private readonly TimeSpan _perItemTimeout;
@@ -26,6 +29,8 @@ public SerialAudioQueue(TimeSpan? perItemTimeout = null)
     /// <summary>Queues <paramref name="play"/> to run after everything already queued.</summary>
     public void Enqueue(Action play) => _queue.Add(play);
 
+    [SuppressMessage("Design", "CA1031",
+        Justification = "A misbehaving or hanging cue must not stop the worker from serving the next one (the per-item timeout has already elapsed).")]
     private void Run()
     {
         foreach (var play in _queue.GetConsumingEnumerable())

src/LageBuch.App/Services/SystemAlarmService.cs

@@ -55,6 +55,8 @@ public void Play(AlarmSound sound)
     }
 
     // Runs on the SerialAudioQueue's worker thread; blocks until the clip finishes playing.
+    [SuppressMessage("Design", "CA1031",
+        Justification = "Player binary missing (e.g. a headless Linux host without ALSA) — stay silent.")]
     private void PlayBlocking(AlarmSound sound, byte[] bytes)
     {
         if (OperatingSystem.IsWindows())

src/LageBuch.Documents/Sections/AtemschutzSection.cs

@@ -7,6 +7,9 @@ namespace LageBuch.Documents.Sections;
 
 public static class AtemschutzSection
 {
+    private static readonly string[] HeaderTitles =
+        ["Trupp", "Mannschaft", "Funkrufname", "Start", "Rückzug", "Ende", "Druck Start", "Druck akt."];
+
     public static void Compose(IContainer container, Incident incident)
     {
         container.Column(column =>
@@ -36,8 +39,7 @@ public static void Compose(IContainer container, Incident incident)
 
                 table.Header(header =>
                 {
-                    foreach (var title in new[]
-                             { "Trupp", "Mannschaft", "Funkrufname", "Start", "Rückzug", "Ende", "Druck Start", "Druck akt." })
+                    foreach (var title in HeaderTitles)
                         header.Cell().Element(Cells.Header).Text(title).SemiBold();
                 });
 

src/LageBuch.Documents/Sections/EtbSection.cs

@@ -7,6 +7,7 @@ namespace LageBuch.Documents.Sections;
 
 public static class EtbSection
 {
+    private static readonly string[] HeaderTitles = ["Zeit", "Richtung", "Von", "An", "Eintrag", "Erfasst von"];
     public static void Compose(IContainer container, Incident incident)
     {
         container.Column(column =>
@@ -34,7 +35,7 @@ public static void Compose(IContainer container, Incident incident)
 
                 table.Header(header =>
                 {
-                    foreach (var title in new[] { "Zeit", "Richtung", "Von", "An", "Eintrag", "Erfasst von" })
+                    foreach (var title in HeaderTitles)
                         header.Cell().Element(HeaderCell).Text(title).SemiBold();
                 });
 

src/LageBuch.Documents/Sections/FilesSection.cs

@@ -13,6 +13,7 @@ namespace LageBuch.Documents.Sections;
 /// </summary>
 public static class FilesSection
 {
+    private static readonly string[] HeaderTitles = ["Name", "Hinzugefügt von", "Datum"];
     public static void Compose(IContainer container, IReadOnlyList<IncidentFile> files, IReadOnlyDictionary<Guid, byte[]> imageBytesById)
     {
         container.Column(column =>
@@ -37,7 +38,7 @@ public static void Compose(IContainer container, IReadOnlyList<IncidentFile> fil
 
                 table.Header(header =>
                 {
-                    foreach (var title in new[] { "Name", "Hinzugefügt von", "Datum" })
+                    foreach (var title in HeaderTitles)
                         header.Cell().Element(Cells.Header).Text(title).SemiBold();
                 });
 

src/LageBuch.Documents/Sections/ForcesSection.cs

@@ -8,6 +8,7 @@ namespace LageBuch.Documents.Sections;
 
 public static class ForcesSection
 {
+    private static readonly string[] HeaderTitles = ["Feuerwehr", "Funkrufname", "Stärke", "AGT", "Status", "Bemerkung"];
     public static void Compose(IContainer container, Incident incident)
     {
         container.Column(column =>
@@ -31,7 +32,7 @@ public static void Compose(IContainer container, Incident incident)
 
                     table.Header(header =>
                     {
-                        foreach (var title in new[] { "Feuerwehr", "Funkrufname", "Stärke", "AGT", "Status", "Bemerkung" })
+                        foreach (var title in HeaderTitles)
                             header.Cell().Element(Cells.Header).Text(title).SemiBold();
                     });
 

src/LageBuch.Documents/Sections/RolesSection.cs

@@ -7,6 +7,7 @@ namespace LageBuch.Documents.Sections;
 
 public static class RolesSection
 {
+    private static readonly string[] HeaderTitles = ["Funktion", "Name", "Abschnitt", "Funkrufname", "Handynummer", "Von", "Bis"];
     public static void Compose(IContainer container, Incident incident)
     {
         container.Column(column =>
@@ -37,7 +38,7 @@ public static void Compose(IContainer container, Incident incident)
 
                 table.Header(header =>
                 {
-                    foreach (var title in new[] { "Funktion", "Name", "Abschnitt", "Funkrufname", "Handynummer", "Von", "Bis" })
+                    foreach (var title in HeaderTitles)
                         header.Cell().Element(Cells.Header).Text(title).SemiBold();
                 });
 

src/LageBuch.Documents/Sections/TasksSection.cs

@@ -7,6 +7,7 @@ namespace LageBuch.Documents.Sections;
 
 public static class TasksSection
 {
+    private static readonly string[] HeaderTitles = ["", "Wichtig", "Dringlich", "Fällig", "Zugeteilt", "Aufgabe", "Erledigt"];
     public static void Compose(IContainer container, Incident incident)
     {
         container.Column(column =>
@@ -41,7 +42,7 @@ public static void Compose(IContainer container, Incident incident)
 
                 table.Header(header =>
                 {
-                    foreach (var title in new[] { "", "Wichtig", "Dringlich", "Fällig", "Zugeteilt", "Aufgabe", "Erledigt" })
+                    foreach (var title in HeaderTitles)
                         header.Cell().Element(HeaderCell).Text(title).SemiBold();
                 });
 

tests/LageBuch.Acceptance.Tests/WorkspaceAcceptanceTests.cs

@@ -1,3 +1,4 @@
+using System.Diagnostics.CodeAnalysis;
 using Avalonia;
 using Avalonia.Controls;
 using Avalonia.Controls.Primitives;
@@ -68,7 +69,9 @@ private sealed class Sub : IDisposable { public void Dispose() { } }
 }
 internal sealed class NoopAlarmService : IAlarmService
 {
+    [SuppressMessage("Performance", "CA1822", Justification = "Implements IAlarmService; interface members cannot be static.")]
     public void Start() { }
+    [SuppressMessage("Performance", "CA1822", Justification = "Implements IAlarmService; interface members cannot be static.")]
     public void Stop() { }
     public void Play(AlarmSound sound) { }
 }

tests/LageBuch.Sync.Hosting.Tests/TestDoubles.cs

@@ -1,4 +1,5 @@
 using System.Collections.Concurrent;
+using System.Diagnostics.CodeAnalysis;
 using System.Net;
 using System.Net.Sockets;
 using LageBuch.AppLogic;
@@ -34,7 +35,9 @@ private sealed class Sub : IDisposable { public void Dispose() { } }
 
 internal sealed class NoAlarm : IAlarmService
 {
+    [SuppressMessage("Performance", "CA1822", Justification = "Implements IAlarmService; interface members cannot be static.")]
     public void Start() { }
+    [SuppressMessage("Performance", "CA1822", Justification = "Implements IAlarmService; interface members cannot be static.")]
     public void Stop() { }
     public void Play(AlarmSound sound) { }
 }