refactor(interactive): remove streaming interactive stack (superseded by ConPTY)

The embedded ConPTY terminal replaced the in-app streaming interactive session, so
delete the dead stack: StreamingClaudeSession, InteractiveSessionService,
ProcessClaudeStreamTransport, IClaudeStreamTransport, ILiveSession, LiveSessionRegistry,
IdleSessionReaper (+ WorkerConfig.InteractiveIdleTimeoutMinutes), the WorkerHub
interactive methods + HubBroadcaster events, IWorkerClient interactive members, the
TaskMonitorViewModel composer + SessionTerminalView composer markup, and the old
'Run interactively' entry. AskUser/PendingQuestionRegistry, the autonomous path,
planning, ResumeTaskInTerminal, and all ConPTY code are kept. Localization pruned.

src/ClaudeDo.Worker/Planning/Interfaces/ITerminalLauncher.cs

@@ -2,7 +2,7 @@ namespace ClaudeDo.Worker.Planning;
 
 // Launches the Claude CLI in a visible terminal for human-driven planning sessions.
 // Not used for headless task execution (that path is ClaudeProcess, prompt over stdin)
-// nor for interactive sessions (those use InteractiveSessionService + StreamingClaudeSession).
+// nor for embedded ConPTY interactive sessions (those use IInteractiveLaunchSpecService).
 public interface ITerminalLauncher
 {
     Task LaunchPlanningStartAsync(PlanningSessionStartContext ctx, CancellationToken cancellationToken);