feat(worker): route Serilog Warn/Error to footer + buffer recent logs for overlay

src/ClaudeDo.Worker/Program.cs

@@ -7,6 +7,7 @@ using ClaudeDo.Worker.Config;
 using ClaudeDo.Worker.External;
 using ClaudeDo.Worker.Hub;
 using ClaudeDo.Worker.Lifecycle;
+using ClaudeDo.Worker.Logging;
 using ClaudeDo.Worker.Planning;
 using ClaudeDo.Worker.Queue;
 using ClaudeDo.Worker.Runner;
@@ -34,13 +35,22 @@ var builder = WebApplication.CreateBuilder(args);
 
 var logRoot = cfg.LogRoot;
 Directory.CreateDirectory(logRoot);
+
+// In-memory ring + broadcast sink power the footer log strip and the Log Visualizer
+// overlay. Created pre-build so Serilog can write to the sink; the SignalR broadcaster
+// is attached once the host is built (see below).
+var logBuffer = new LogRingBuffer(TimeSpan.FromMinutes(30));
+var broadcastSink = new BroadcastLogSink(logBuffer);
+
 builder.Host.UseSerilog((ctx, lc) => lc
     .MinimumLevel.Information()
     .WriteTo.File(
         System.IO.Path.Combine(logRoot, "worker-.log"),
         rollingInterval: RollingInterval.Day,
         retainedFileCountLimit: 7,
-        shared: true));
+        shared: true)
+    .WriteTo.Sink(broadcastSink));
+builder.Services.AddSingleton(logBuffer);
 
 builder.Services.AddDbContextFactory<ClaudeDoDbContext>(opt =>
     opt.UseSqlite($"Data Source={cfg.DbPath}"));
@@ -180,6 +190,10 @@ builder.WebHost.UseUrls($"http://127.0.0.1:{cfg.SignalRPort}");
 
 var app = builder.Build();
 
+// Now that the hub context exists, let the broadcast sink push Warn/Error to the footer.
+var logBroadcaster = app.Services.GetRequiredService<HubBroadcaster>();
+broadcastSink.Attach((message, level, ts) => logBroadcaster.WorkerLog(message, level, ts));
+
 using (var scope = app.Services.CreateScope())
 {
     ClaudeDoDbContext.MigrateAndConfigure(