fix(macos): menu bar activity badge not showing during agent work

The gateway emits agent events with stream='lifecycle' and data.phase
('start'/'end'/'error'), but ControlChannel.swift was looking for
stream='job' and data.state ('started'/'streaming'/etc).

This mismatch caused the menu bar to always show 'Idle' even when the
agent was actively working.

Changes:
- ControlChannel.swift: Handle 'lifecycle' stream instead of 'job',
  map phase values to the states WorkActivityStore expects
- AgentEventsWindow.swift: Update stream color mapping for consistency

Fixes #1932

apps/macos/Sources/Moltbot/AgentEventsWindow.swift

@@ -67,7 +67,7 @@ private struct EventRow: View {
 
     private var tint: Color {
         switch self.event.stream {
-        case "job": .blue
+        case "lifecycle": .blue
         case "tool": .orange
         case "assistant": .green
         default: .gray

apps/macos/Sources/Moltbot/ControlChannel.swift

@@ -379,8 +379,11 @@ final class ControlChannel {
         let sessionKey = (event.data["sessionKey"]?.value as? String) ?? "main"
 
         switch event.stream.lowercased() {
-        case "job":
-            if let state = event.data["state"]?.value as? String {
+        case "lifecycle":
+            // Gateway emits phase: "start" | "end" | "error"
+            // WorkActivityStore expects state: "started" | "streaming" | (anything else = done)
+            if let phase = event.data["phase"]?.value as? String {
+                let state = phase.lowercased() == "start" ? "started" : "done"
                 WorkActivityStore.shared.handleJob(sessionKey: sessionKey, state: state)
             }
         case "tool":