Fix sample HTML: summary High counts, column width CSS alignment

- Fix summary label mismatches: Service.dll (1 High) → (7 High),
  remove false "(1 High)" from blocks with 0 High changes
- Sync sample CSS with source: replace old sc-cnt-count-g (4em)
  with individual sc-cnt-high/medium/low/total-g columns (5em each)
- Fix JS count table width calculation: 4*scEmPx → 4*5*scEmPx

https://claude.ai/code/session_01HnKMFA576NFwa2RzB8vCqE

Author: claude

Services/HtmlReport/diff_report.js

@@ -284,7 +284,7 @@
             + px('--sc-rettype-w', 12) + px('--sc-params-w', 18)
             + px('--sc-body-w', 5);
     document.querySelectorAll('table.sc-detail').forEach(function(t) { t.style.width = detW + 'px'; });
-    var cntW = px('--sc-cnt-class-w', 22) + 7 * scEmPx + 4 * scEmPx;
+    var cntW = px('--sc-cnt-class-w', 22) + 7 * scEmPx + 4 * 5 * scEmPx;
     document.querySelectorAll('table.sc-count').forEach(function(t) { t.style.width = cntW + 'px'; });
   }