refactor(interactive): remove streaming interactive stack (superseded by ConPTY)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/Config/WorkerConfig.cs

@@ -41,10 +41,6 @@ public sealed class WorkerConfig
     [JsonPropertyName("external_mcp_api_key")]
     public string? ExternalMcpApiKey { get; set; }
 
-    /// <summary>Interactive/streaming sessions idle longer than this are stopped by IdleSessionReaper. 0 disables reaping.</summary>
-    [JsonPropertyName("interactive_idle_timeout_minutes")]
-    public int InteractiveIdleTimeoutMinutes { get; set; } = 30;
-
     [JsonPropertyName("online_inbox")]
     public OnlineInboxConfig OnlineInbox { get; set; } = new();