feat(ui): Mission Control Recent Sessions mit verschachtelten Handoffs

Neue Tabelle mission_control_sessions (Migration AddMissionControlSessions), befuellt vom
InteractiveLaunchSpecService bei Task-, Ad-hoc- und Handoff-Kacheln. Flyout im Mission-Control-Header
listet die letzten 14 Tage / 50 Sessions, Handoffs eingerueckt unter ihrer Ursprungs-Session, mit
Fortsetzen (--resume im gespeicherten cwd) und Brief anzeigen.

src/ClaudeDo.Ui/Services/Interfaces/IWorkerClient.cs

@@ -141,6 +141,8 @@ public interface IWorkerClient : INotifyPropertyChanged
     Task<LaunchSpec> GetAdHocLaunchSpecAsync(string directory, string paneId, CancellationToken ct = default);
     /// <summary>Launch spec for the fresh session a tile hands off to after handoff_session.</summary>
     Task<LaunchSpec> GetSessionHandoffLaunchSpecAsync(string paneId, string cwd, string briefPath, string? taskId, CancellationToken ct = default);
+    /// <summary>Launch spec resuming a recorded Mission Control session in its cwd, as tile paneId.</summary>
+    Task<LaunchSpec> GetResumeSessionLaunchSpecAsync(string sessionId, string paneId, CancellationToken ct = default);
     /// <summary>Launch spec for an embedded ConPTY "merge helper" session that drives the given
     /// tasks to a merged/Done state. listId scopes the session (and cwd) to that list.
     /// handlerTaskId (from CreateMergeHelperTaskAsync) is rendered into the brief so the session