feat: show app version footer in watch view

src/AIUsageMonitor.Cli/Commands/WatchCommand.cs

@@ -113,6 +113,7 @@ public static Command Create(DataService dataService, IUpdateChecker updateCheck
             // visible while it runs rather than only after it exits.
             var updateInfo = await updateChecker.CheckForUpdateAsync(ct);
             var updateNotice = UpdateNotice.BuildRenderable(updateInfo);
+            var versionFooter = SpectreRenderer.BuildVersionFooter();
 
             IRenderable BuildCurrent(IProgress<int>? progress = null)
             {
@@ -151,8 +152,19 @@ IRenderable BuildLimits(IProgress<int>? progress)
 
             ClearScreen();
 
-            IRenderable WithUpdateNotice(IRenderable content) =>
-                updateNotice is null ? content : new Rows(content, updateNotice);
+            IRenderable WithUpdateNotice(IRenderable content)
+            {
+                var rows = new List<IRenderable> { content };
+                if (updateNotice is not null)
+                {
+                    rows.Add(updateNotice);
+                }
+                if (versionFooter is not null)
+                {
+                    rows.Add(versionFooter);
+                }
+                return rows.Count == 1 ? content : new Rows(rows);
+            }
 
             var current = view == "limits"
                 ? WithUpdateNotice(SpectreRenderer.BuildUsageLimits(lastSessionWindow!, lastWeekWindow!, effectiveSessionTokenLimit, effectiveWeekTokenLimit, recalibrationEnabled, effectiveSessionResetAt is not null))

src/AIUsageMonitor.Cli/Rendering/SpectreRenderer.cs

@@ -1,4 +1,5 @@
 using AIUsageMonitor.Core.Models;
+using AIUsageMonitor.UpdateCheck;
 using Spectre.Console;
 using Spectre.Console.Rendering;
 
@@ -364,6 +365,18 @@ public static IRenderable BuildUsageLimits(
     /// <param name="stats">The session statistics data to render.</param>
     public static void RenderSessionStats(SessionStats stats) => AnsiConsole.Write(BuildSessionStats(stats));
 
+    /// <summary>
+    /// Builds a footer line naming the application and its running version, for display under
+    /// the continuously refreshed <c>watch</c> view only - a one-shot command's output is short
+    /// enough that the version line would just be noise under it.
+    /// </summary>
+    /// <returns>A grey markup line, or <see langword="null"/> if the version could not be determined.</returns>
+    public static IRenderable? BuildVersionFooter()
+    {
+        var version = AppVersion.GetCurrent();
+        return version is null ? null : new Markup($"[grey]aimon v{version} · https://github.com/coldhighsun/AIUsageMonitor[/]");
+    }
+
     /// <summary>
     /// Builds a titled table with a single row of centered stat values, one column per stat.
     /// </summary>