feat: add provider-native request switches (#5254)

webui/src/components/thread/activity/activity-message-model.ts

@@ -1,6 +1,7 @@
 import {
   canonicalToolTrace,
   mergeToolProgressEvents,
+  mergeToolProgressTraceLines,
   mergeUniqueToolTraceLines,
 } from "@/lib/tool-traces";
 import type { UIMediaAttachment, UIMessage } from "@/lib/types";
@@ -56,8 +57,15 @@ function canMergeAdjacentProgress(
 }
 
 function mergeTraceMessages(previous: UIMessage, incoming: UIMessage): UIMessage {
-  const traces = mergeUniqueToolTraceLines(messageTraces(previous), messageTraces(incoming)).traces;
   const toolEvents = mergeToolProgressEvents(previous.toolEvents, incoming.toolEvents ?? []);
+  const traces = incoming.toolEvents?.length
+    ? mergeToolProgressTraceLines(
+        messageTraces(previous),
+        previous.toolEvents,
+        messageTraces(incoming),
+        incoming.toolEvents ?? [],
+      )
+    : mergeUniqueToolTraceLines(messageTraces(previous), messageTraces(incoming)).traces;
   const fileEdits = [...(previous.fileEdits ?? []), ...(incoming.fileEdits ?? [])];
   const media = uniqueMedia([...(previous.media ?? []), ...(incoming.media ?? [])]);
 

webui/src/components/thread/activity/trace-activity-model.ts

@@ -27,7 +27,7 @@ export function describeTraceLine(
     !!parsedUrl && /\b(fetch(?:ing|ed)?|read(?:ing)?|opened?|opening)\b/i.test(trimmed);
 
   if (/search/i.test(name)) {
-    const query = traceFieldFromArgs(args, ["query", "q", "text"]) || args || trimmed;
+    const query = traceFieldFromArgs(args, ["query", "q", "text"]) || args;
     return {
       kind: "search",
       label: presentWebSearchAction(query, status, name === "x_search" ? "x" : "web"),

webui/src/components/thread/activity/web-search-model.ts

@@ -105,7 +105,7 @@ export function presentWebSearchAction(
   if (target === "x") {
     return queryTarget ? `${verb} X · ${queryTarget}` : `${verb} X`;
   }
-  return queryTarget ? `${verb} ${queryTarget}` : verb;
+  return queryTarget ? `${verb} ${queryTarget}` : `${verb} the web`;
 }
 
 function mergeWebSearchRun(