Fix agent event ordering: update state before emitting events

Previously, Agent.emit() was called before state was updated (e.g., appendMessage).
This meant event handlers saw stale state - when message_end fired,
agent.state.messages didn't include the message yet.

Now state is updated first, then events are emitted, so handlers see
consistent state that matches the event.

pi-mono.code-workspace

@@ -1,22 +1,8 @@
 {
 	"folders": [
-		{
-			"name": "sitegeist",
-			"path": "../sitegeist"
-		},
 		{
 			"name": "pi-mono",
 			"path": "."
-		},
-		{
-			"name": "mini-lit",
-			"path": "../mini-lit"
-		},
-		{
-			"path": "../../agent-tools/browser-tools"
-		},
-		{
-			"path": "../pi-terminal-bench"
 		}
 	],
 	"settings": {}