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-methods/chat.ts

@@ -20,6 +20,7 @@ import {
 } from "../chat-abort.js";
 import { type ChatImageContent, parseMessageWithAttachments } from "../chat-attachments.js";
 import { stripEnvelopeFromMessages } from "../chat-sanitize.js";
+import { GATEWAY_CLIENT_CAPS, hasGatewayClientCap } from "../protocol/client-info.js";
 import {
   ErrorCodes,
   errorShape,
@@ -216,7 +217,8 @@ export const chatHandlers: GatewayRequestHandlers = {
       if (configured) {
         thinkingLevel = configured;
       } else {
-        const { provider, model } = resolveSessionModelRef(cfg, entry);
+        const sessionAgentId = resolveSessionAgentId({ sessionKey, config: cfg });
+        const { provider, model } = resolveSessionModelRef(cfg, entry, sessionAgentId);
         const catalog = await context.loadGatewayModelCatalog();
         thinkingLevel = resolveThinkingDefault({
           cfg,
@@ -226,11 +228,13 @@ export const chatHandlers: GatewayRequestHandlers = {
         });
       }
     }
+    const verboseLevel = entry?.verboseLevel ?? cfg.agents?.defaults?.verboseDefault;
     respond(true, {
       sessionKey,
       sessionId,
       messages: capped,
       thinkingLevel,
+      verboseLevel,
     });
   },
   "chat.abort": ({ params, respond, context }) => {
@@ -432,7 +436,6 @@ export const chatHandlers: GatewayRequestHandlers = {
         startedAtMs: now,
         expiresAtMs: resolveChatRunExpiresAtMs({ now, timeoutMs }),
       });
-
       const ackPayload = {
         runId: clientRunId,
         status: "started" as const,
@@ -506,8 +509,16 @@ export const chatHandlers: GatewayRequestHandlers = {
           abortSignal: abortController.signal,
           images: parsedImages.length > 0 ? parsedImages : undefined,
           disableBlockStreaming: true,
-          onAgentRunStart: () => {
+          onAgentRunStart: (runId) => {
             agentRunStarted = true;
+            const connId = typeof client?.connId === "string" ? client.connId : undefined;
+            const wantsToolEvents = hasGatewayClientCap(
+              client?.connect?.caps,
+              GATEWAY_CLIENT_CAPS.TOOL_EVENTS,
+            );
+            if (connId && wantsToolEvents) {
+              context.registerToolEventRecipient(runId, connId);
+            }
           },
           onModelSelected,
         },