i18n(ui): English UI labels for weekly report and notes (report body stays German)

tests/ClaudeDo.Worker.Tests/Report/WeekReportServiceTests.cs

@@ -43,7 +43,7 @@ public class WeekReportServiceTests : IDisposable
         var md = await svc.GenerateAsync(Start, End);
 
         Assert.Equal(0, claude.Calls);
-        Assert.Contains("Keine Aktivität", md);
+        Assert.Contains("No activity", md);
         using var ctx = _db.CreateContext();
         Assert.NotNull(await new WeekReportRepository(ctx).GetByRangeAsync(Start, End));
     }