Widen APDU list vertical scrollbar to 12px

- .apdu-list::-webkit-scrollbar override (global default is 6px)
- Bump 1.22.16, SW cache v47->v48

frontend/index.html

@@ -120,6 +120,8 @@ body { font: 14px/1.5 system-ui, sans-serif; background: var(--bg); color: var(-
 
 /* APDU list */
 .apdu-list { flex: 1 1 0; min-height: 0; overflow-y: auto; padding: 8px; }
+.apdu-list::-webkit-scrollbar { width: 12px; }
+.apdu-list::-webkit-scrollbar-thumb { border-radius: 6px; }
 .apdu-entry { display: flex; gap: 12px; padding: 3px 12px; border-bottom: 1px solid var(--bg-panel); cursor: pointer; align-items: baseline; }
 .apdu-entry.apdu-pair { background: var(--pair-row); }
 .apdu-entry:hover { background: var(--bg-panel); }
@@ -2623,7 +2625,7 @@ function onFilterChange() {
 }
 
 // ──────────────────── Versioning ────────────────────
-const PWA_VERSION = '1.22.15';
+const PWA_VERSION = '1.22.16';
 const MIN_SERVER_VERSION = '1.0.0';
 
 function parseVersion(v) {