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

webui/src/tests/useNanobotStream.test.tsx

@@ -610,6 +610,51 @@ describe("useNanobotStream", () => {
     ]);
   });
 
+  it("replaces a hosted search placeholder when its query arrives", () => {
+    const fake = fakeClient();
+    const { result } = renderHook(() => useNanobotStream("chat-hosted-search", EMPTY_MESSAGES), {
+      wrapper: wrap(fake.client),
+    });
+
+    act(() => {
+      fake.emit("chat-hosted-search", {
+        event: "message",
+        chat_id: "chat-hosted-search",
+        text: "web_search()",
+        kind: "tool_hint",
+        tool_events: [{
+          phase: "start",
+          call_id: "ws-1",
+          name: "web_search",
+          arguments: {},
+        }],
+      });
+      fake.emit("chat-hosted-search", {
+        event: "message",
+        chat_id: "chat-hosted-search",
+        text: "",
+        kind: "progress",
+        tool_events: [{
+          phase: "end",
+          call_id: "ws-1",
+          name: "web_search",
+          arguments: { query: "nanobot news" },
+          result: { status: "completed" },
+        }],
+      });
+    });
+
+    expect(result.current.messages).toHaveLength(1);
+    expect(result.current.messages[0].traces).toEqual([
+      'web_search({"query":"nanobot news"})',
+    ]);
+    expect(result.current.messages[0].toolEvents).toMatchObject([{
+      phase: "end",
+      call_id: "ws-1",
+      arguments: { query: "nanobot news" },
+    }]);
+  });
+
   it("keeps phase updates when a tool event trace line is deduped", () => {
     const fake = fakeClient();
     const { result } = renderHook(() => useNanobotStream("chat-tool-phase", EMPTY_MESSAGES), {