test(e2e): answer the motion dialog in model-matrix and the prod canary

Generate now asks "Start a debate with this motion?" before it sends the
request. Neither spec answered it, so every model-matrix case and the
canary's "generates a case" test waited out their response timeouts with
the dialog open and no request sent.

Both now choose "use it once": model-matrix through the existing
chooseForMotion helper, the canary inline because it does not load the
full-stack helpers. Using it once also keeps the production canary
account from accumulating debates.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01HyWuBiDEMvVnjmguH9CwCZ

Author: Programcode

e2e/model-matrix/generate.spec.ts

@@ -1,5 +1,5 @@
 import { MODEL_CATALOG } from "../../supabase/functions/_shared/model-catalog";
-import { expect, fake, stackReady, test } from "../full-stack/stack";
+import { chooseForMotion, expect, fake, stackReady, test } from "../full-stack/stack";
 import { aiResponse, LIVE_TIMEOUT } from "../live/live";
 
 // Every model a user can pick must generate a case. The regular live suite pins
@@ -16,6 +16,7 @@ for (const model of MODEL_CATALOG) {
     await page.getByRole("textbox", { name: "Motion / Topic *" }).fill("This House would make public transport free at the point of use");
     const response = aiResponse(page, "generate");
     await page.getByRole("button", { name: "Generate Debate Case" }).click();
+    await chooseForMotion(page, "once");
     const body = await response;
     expect(body.output.contentions).toHaveLength(3);
 

e2e/production/canary.spec.ts

@@ -115,6 +115,10 @@ test("the canary account generates a case", async ({ page }) => {
   await page.getByRole("textbox", { name: "Motion / Topic *" }).fill("This House would make public transport free");
   const generated = page.waitForResponse((response) => response.url().endsWith("/functions/v1/ai") && response.request().method() === "POST", { timeout: 150_000 });
   await page.getByRole("button", { name: "Generate Debate Case" }).click();
+  // Use the motion once so the canary account does not collect production debates.
+  await page.getByRole("dialog", { name: /^(Start a debate with this motion\?|This is a different motion)$/ })
+    .getByRole("button", { name: /^(Not now, use it once|Use once without saving to a debate)$/ })
+    .click();
   const response = await generated;
   expect(response.status(), "ai generate status").toBe(200);
   const body = await response.json() as { output: { contentions?: unknown[] } };