refactor(interactive): remove streaming interactive stack (superseded by ConPTY)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

tests/ClaudeDo.Worker.Tests/Infrastructure/FakeClaudeStreamTransport.cs

@@ -1,47 +0,0 @@
-using ClaudeDo.Worker.Runner.Interfaces;
-
-namespace ClaudeDo.Worker.Tests.Infrastructure;
-
-public sealed class FakeClaudeStreamTransport : IClaudeStreamTransport
-{
-    public List<string> Written { get; } = [];
-    public bool Killed { get; private set; }
-    public bool Started { get; private set; }
-
-    public event Func<string, Task>? LineReceived;
-    public event Func<string, Task>? StderrReceived;
-
-    public Task StartAsync(IReadOnlyList<string> args, string workingDirectory, CancellationToken ct)
-    {
-        Started = true;
-        return Task.CompletedTask;
-    }
-
-    public Task WriteLineAsync(string jsonLine, CancellationToken ct)
-    {
-        Written.Add(jsonLine);
-        return Task.CompletedTask;
-    }
-
-    public void Kill() => Killed = true;
-
-    public Task WaitForExitAsync() => Task.CompletedTask;
-
-    public ValueTask DisposeAsync() => ValueTask.CompletedTask;
-
-    // Test helper: push a simulated stdout line to all LineReceived subscribers.
-    public async Task PushLineAsync(string line)
-    {
-        var handler = LineReceived;
-        if (handler is not null)
-            await handler(line);
-    }
-
-    // Test helper: push a simulated stderr line.
-    public async Task PushStderrAsync(string line)
-    {
-        var handler = StderrReceived;
-        if (handler is not null)
-            await handler(line);
-    }
-}