Change leaderboard parser in mesages

static/index.html

@@ -1140,7 +1140,11 @@ const sendMessageTip = document.getElementById('sendMessageTip');
 //  PARSING (messages)
 // ─────────────────────────────────────────────────────────────
 const FILENAME_RE = /^(\d{8})-(\d{6})_(.+?)(?:_(.+))?\.md$/;
-const STEPS_RE = /(\d[\d,]*)\s*steps/gi;
+// Matches the explicit leaderboard-result marker defined in the collab README:
+//   **Leaderboard result:** <steps> steps · ...
+// Captures the step count from the same line as the marker. Loose matches like
+// "2812 steps" in prose are intentionally ignored.
+const LEADERBOARD_RESULT_RE = /\*\*\s*leaderboard\s+result\s*:\s*\*\*[^\n]*?(\d[\d,]*)\s*steps/gi;
 const STEPS_MIN = 100;
 const STEPS_MAX = 100000;
 
@@ -1214,8 +1218,8 @@ function epochFromFilename(filename) {
 function findBestSteps(body) {
   const matches = [];
   let m;
-  STEPS_RE.lastIndex = 0;
-  while ((m = STEPS_RE.exec(body)) !== null) {
+  LEADERBOARD_RESULT_RE.lastIndex = 0;
+  while ((m = LEADERBOARD_RESULT_RE.exec(body)) !== null) {
     const v = parseInt(m[1].replace(/,/g, ''), 10);
     if (v >= STEPS_MIN && v <= STEPS_MAX) matches.push(v);
   }