Expose chat-latest and default Quick Question to it

web/src/App.tsx

@@ -80,7 +80,7 @@ import {
   resolveSidebarSelectionAfterRefresh,
   type SidebarSelection,
 } from "@/lib/sidebar-selection";
-import { buildQuickQuestionRequest } from "@/lib/quick-question";
+import { buildQuickQuestionRequest, pickQuickQuestionModel, QUICK_QUESTION_DEFAULT_MODEL } from "@/lib/quick-question";
 import {
   appendStreamingDelta,
   clearStreamingAssistantTrace,
@@ -161,7 +161,7 @@ function buildWorkspaceUrl(selection: SidebarSelection | null) {
 }
 
 const PROVIDER_FALLBACK_MODELS: Record<Provider, string[]> = {
-  openai: ["gpt-4.1-mini"],
+  openai: ["gpt-4.1-mini", QUICK_QUESTION_DEFAULT_MODEL],
   anthropic: ["claude-3-5-sonnet-latest"],
   xai: ["grok-3-mini"],
   gemini: ["gemini-3.5-flash", "gemini-flash-latest"],
@@ -991,7 +991,7 @@ export default function App() {
   );
   const [quickModel, setQuickModel] = useState(() => {
     const stored = loadStoredQuickQuestionModelSelection();
-    return stored.modelPreferences[stored.provider] ?? PROVIDER_FALLBACK_MODELS[stored.provider][0];
+    return pickQuickQuestionModel(stored.provider, PROVIDER_FALLBACK_MODELS[stored.provider], stored.modelPreferences[stored.provider]);
   });
   const [isQuickQuestionOpen, setIsQuickQuestionOpen] = useState(false);
   const [quickPrompt, setQuickPrompt] = useState("");
@@ -1449,7 +1449,7 @@ export default function App() {
   useEffect(() => {
     if (quickModel.trim()) return;
     setQuickModel((current) => {
-      return current.trim() || pickProviderModel(quickProviderModelOptions, quickProviderModelPreferences[quickProvider]);
+      return current.trim() || pickQuickQuestionModel(quickProvider, quickProviderModelOptions, quickProviderModelPreferences[quickProvider]);
     });
   }, [quickModel, quickProvider, quickProviderModelOptions, quickProviderModelPreferences]);
 
@@ -4176,7 +4176,7 @@ export default function App() {
                     const nextProvider = event.currentTarget.value as Provider;
                     setQuickProvider(nextProvider);
                     const options = getModelOptions(modelCatalog, nextProvider);
-                    setQuickModel(pickProviderModel(options, quickProviderModelPreferences[nextProvider]));
+                    setQuickModel(pickQuickQuestionModel(nextProvider, options, quickProviderModelPreferences[nextProvider]));
                   }}
                   disabled={isQuickQuestionSending || isConvertingQuickQuestion}
                   aria-label="Quick question provider"

web/src/lib/quick-question.ts

@@ -1,5 +1,13 @@
 import type { Provider } from "./api";
 
+export const QUICK_QUESTION_DEFAULT_MODEL = "chat-latest";
+
+export function pickQuickQuestionModel(provider: Provider, options: string[], preferred: string | null = null) {
+  if (preferred?.trim()) return preferred.trim();
+  if (provider === "openai") return QUICK_QUESTION_DEFAULT_MODEL;
+  return options[0] ?? "";
+}
+
 export function buildQuickQuestionRequest({
   provider,
   model,

web/tests/quick-question.test.mjs

@@ -1,6 +1,27 @@
 import assert from "node:assert/strict";
 import test from "node:test";
-import { buildQuickQuestionRequest } from "../src/lib/quick-question.ts";
+import { buildQuickQuestionRequest, pickQuickQuestionModel } from "../src/lib/quick-question.ts";
+
+test("quick questions default to chat-latest before and after the model catalog loads", () => {
+  for (const options of [[], ["gpt-4.1-mini"], ["gpt-4.1-mini", "chat-latest"]]) {
+    const model = pickQuickQuestionModel("openai", options);
+    assert.equal(model, "chat-latest");
+    assert.deepEqual(buildQuickQuestionRequest({ provider: "openai", model, content: "What is UTC?" }), {
+      provider: "openai",
+      model: "chat-latest",
+      question: "What is UTC?",
+    });
+  }
+});
+
+test("quick questions preserve saved models and use provider-specific choices when switching providers", () => {
+  assert.equal(pickQuickQuestionModel("openai", ["chat-latest"], " gpt-4.1-mini "), "gpt-4.1-mini");
+  assert.equal(pickQuickQuestionModel("openai", ["gpt-4.1-mini"], " "), "chat-latest");
+  assert.equal(pickQuickQuestionModel("anthropic", ["claude-3-5-sonnet-latest"]), "claude-3-5-sonnet-latest");
+  assert.equal(pickQuickQuestionModel("anthropic", ["claude-3-5-sonnet-latest"], "claude-3-haiku"), "claude-3-haiku");
+  assert.equal(pickQuickQuestionModel("anthropic", []), "");
+  assert.equal(pickQuickQuestionModel("openai", ["gpt-4.1-mini", "chat-latest"]), "chat-latest");
+});
 
 test("quick question requests use the dedicated server endpoint shape", () => {
   const request = buildQuickQuestionRequest({