On a phone, Return in the reply box is a new line; Reply is the button. A hardware keyboard's Enter still sends

Co-Authored-By: Claude Opus 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01QjVvE4YAcK3AGwV7kZXeN4

1 files changed, 11 insertions, 0 deletions

diff --git a/tools/thread-reply-test.js b/tools/thread-reply-test.js
index 8ba59d3..f3bda91 100644
--- a/tools/thread-reply-test.js
+++ b/tools/thread-reply-test.js
@@ -88,6 +88,17 @@ try {
   await page.evaluate(() => document.querySelector('#app .note-act').click()); // one atomic tap, as below
   await page.waitForSelector('.thread-reply-input');
   check('Reply again opens an empty field', await page.evaluate(() => document.querySelector('.thread-reply-input')?.value === ''));
+  // a phone: Return is a new line, not a send
+  await page.evaluate(() => { const mm = window.matchMedia; window._mm = mm; window.matchMedia = (q) => q === '(pointer: coarse)' ? { matches: true } : mm(q); });
+  await page.type('.thread-reply-input', 'Line one');
+  await page.keyboard.press('Enter');
+  await page.type('.thread-reply-input', 'two');
+  check("on a phone, Return adds a line instead of sending", await page.evaluate(() =>
+    document.querySelector('.thread-reply-input')?.value === 'Line one\ntwo' && sent.length === 0), await page.evaluate(() => document.querySelector('.thread-reply-input')?.value));
+  await page.evaluate(() => { window.matchMedia = window._mm; });
+  await page.focus('.thread-reply-input');
+  await page.keyboard.down('Control'); await page.keyboard.press('a'); await page.keyboard.up('Control');
+  await page.keyboard.press('Backspace');
   await page.type('.thread-reply-input', 'A reply before the root loads');
   // (one atomic tap: a repaint landing between finding the button and clicking it replaces it)
   await page.waitForFunction(() => !document.querySelector('.thread-reply-send')?.disabled);