test(web): await editable composer between turns

apps/web/tests/permission-policy-context.e2e.ts

@@ -106,7 +106,8 @@ describe('web e2e: current sandbox policy reaches the model before tools', () =>
       await input.fill(PROMPTS[index] as string)
       await input.press('Enter')
       sessionId = await settled
-      await expect.poll(() => input.isEnabled(), { timeout: 10_000 }).toBe(true)
+      await page.locator('[data-composer-input][contenteditable="true"]').first()
+        .waitFor({ timeout: 10_000 })
     }
 
     await input.fill('/permission read-only')