stocks: revert price-range bounds to closes-only

Drops the cost-inclusive min/max — the cost tick clamping to the bar
edge when it falls outside the closes window is the intended visual
signal.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: zhgchgli0718

index.html

@@ -2034,14 +2034,10 @@
       </div>
     );
   }
-  // Anchor the bar's left edge at min(closes, cost) and right edge at
-  // max(closes, cost) so the cost tick always lands inside the bar even
-  // for deeply unrealized positions. Falls back to closes alone when
-  // cost is absent.
-  const minBound = hasCost ? Math.min(...closes, cost) : Math.min(...closes);
-  const maxBound = hasCost ? Math.max(...closes, cost) : Math.max(...closes);
-  const min = minBound;
-  const max = maxBound;
+  // Anchor the bar to closes alone — cost may fall outside the band and
+  // get clamped to 0% / 100%, which is the intended visual signal.
+  const min = Math.min(...closes);
+  const max = Math.max(...closes);
   const cur = closes[closes.length - 1];
   const span = max - min;
   const clamp = (v) => span > 0 ? Math.max(0, Math.min(100, ((v - min) / span) * 100)) : 50;

sw.js

@@ -10,7 +10,7 @@
 //
 // Bump CACHE_VERSION when you change static assets to force clients to refresh.
 
-const CACHE_VERSION = "v12";
+const CACHE_VERSION = "v13";
 const STATIC_CACHE = "dashboard-static-" + CACHE_VERSION;
 const PRECACHE_URLS = [
   "./",