TUI/Gateway: fix pi streaming + tool routing + model display + msg updating (#8432)

* TUI/Gateway: fix pi streaming + tool routing

* Tests: clarify verbose tool output expectation

* fix: avoid seq gaps for targeted tool events (#8432) (thanks @gumadeiras)

src/gateway/server.impl.ts

@@ -318,6 +318,7 @@ export async function startGatewayServer(
     wss,
     clients,
     broadcast,
+    broadcastToConnIds,
     agentRunSeq,
     dedupe,
     chatRunState,
@@ -326,6 +327,7 @@ export async function startGatewayServer(
     addChatRun,
     removeChatRun,
     chatAbortControllers,
+    toolEventRecipients,
   } = await createGatewayRuntimeState({
     cfg: cfgAtStart,
     bindHost,
@@ -441,11 +443,13 @@ export async function startGatewayServer(
   const agentUnsub = onAgentEvent(
     createAgentEventHandler({
       broadcast,
+      broadcastToConnIds,
       nodeSendToSession,
       agentRunSeq,
       chatRunState,
       resolveSessionKeyForRun,
       clearAgentRunContext,
+      toolEventRecipients,
     }),
   );
 
@@ -495,6 +499,7 @@ export async function startGatewayServer(
       incrementPresenceVersion,
       getHealthVersion,
       broadcast,
+      broadcastToConnIds,
       nodeSendToSession,
       nodeSendToAllSubscribed,
       nodeSubscribe,
@@ -509,6 +514,7 @@ export async function startGatewayServer(
       chatDeltaSentAt: chatRunState.deltaSentAt,
       addChatRun,
       removeChatRun,
+      registerToolEventRecipient: toolEventRecipients.add,
       dedupe,
       wizardSessions,
       findRunningWizard,