fix: recognize past-tense vomiting in chat safety

src/domain.js

@@ -4,7 +4,7 @@ const URGENT_TEXT_PATTERNS = Object.freeze([
   ['blood', /\b(?:rectal bleeding|bleeding from (?:the )?(?:rectum|bottom)|blood(?:y)? (?:in|on|with) (?:my |the )?(?:stool|poop|bowel movement)|(?:stool|poop) (?:has|contains|with) blood)\b/i],
   ['blackOrDarkRed', /\b(?:(?:black|dark[- ]?red) (?:stool|poop|bowel movement)|(?:stool|poop|bowel movement) (?:is|looks?) (?:black|dark[- ]?red))s?\b/i],
   ['severePain', /\b(?:severe|constant|unrelenting) (?:abdominal|stomach|belly) pain\b/i],
-  ['vomiting', /\b(?:vomit(?:ing|ed|s)?|throw(?:ing|s)? up|threw up|thrown up)\b/i],
+  ['vomiting', /\b(?:vomit(?:ing|ed|s)?|throw(?:ing|s)? up|threw up|thrown up|puk(?:e|ed|ing|es)|emesis)\b/i],
   ['fever', /\bfever(?:ish)?\b/i],
   ['cannotPassGas', /\b(?:cannot|can['’]?t|cant|unable to|not able to) pass gas\b/i],
 ]);

tests/domain.test.js

@@ -51,6 +51,8 @@ test('detects common urgent symptom language without matching unrelated blood wo
     'I have severe stomach pain',
     'I am throwing up and have a fever',
     'I threw up',
+    'I puked twice',
+    'I have emesis',
     'I am unable to pass gas',
   ]) assert.equal(detectUrgentText(message).urgent, true, message);
   assert.equal(detectUrgentText('My blood pressure was checked').urgent, false);