test(web): chat over an upload opens with the upload chat model (red)

Red: App.UploadChatModel is undefined.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

internal/web/uploads_chat_handler_test.go

@@ -165,3 +165,18 @@ func TestUploadStatus_DoneOffersTheChatLinkOnlyWhenChatIsWired(t *testing.T) {
 	id2 := seedUpload(t, userID, "m2", "done", meetingText)
 	assert.NotContains(t, body(t, do(t, appWithout, get("/uploads/"+id2+"/status"))), "/chat")
 }
+
+func TestUploadChat_OpensWithTheUploadChatModelNotTheSummarizerDefault(t *testing.T) {
+	// koala/phi4-mini is first in the offered list (it is the summarizer default) and
+	// has an 8,192-token context: an hour of speech returns HTTP 400 there. Chat over
+	// an upload must open with the model configured for it.
+	app, fc := newUploadChatApp(t)
+	app.UploadChatModel = "iguana/gemma4-26b"
+	id := seedUpload(t, userID, "m", "done", meetingText)
+
+	page := body(t, do(t, app, get("/uploads/"+id+"/chat")))
+	do(t, app, chatPost("/uploads/"+id+"/chat", url.Values{"question": {"q"}}))
+
+	assert.Contains(t, page, `<option value="iguana/gemma4-26b" selected`, "the page opens on the upload chat model")
+	assert.Equal(t, "iguana/gemma4-26b", fc.gotReq.Model, "a post that names no model uses it too")
+}