Reduce vertical padding for session list view rows (8px->4px)

- Bump 1.22.7, SW cache v38->v39

frontend/index.html

@@ -216,8 +216,8 @@ body { font: 14px/1.5 system-ui, sans-serif; background: var(--bg); color: var(-
 .session-view-toggle button.active { background: var(--accent); color: #fff; border-color: var(--accent); }
 .sessions-list { padding: 0 16px 16px; overflow-y: auto; }
 .sessions-list table { width: 100%; border-collapse: collapse; }
-.sessions-list th { text-align: left; padding: 8px 12px; color: var(--text-muted); font-size: 12px; border-bottom: 1px solid var(--border); }
-.sessions-list td { padding: 8px 12px; border-bottom: 1px solid var(--bg-input); font-size: 13px; }
+.sessions-list th { text-align: left; padding: 4px 12px; color: var(--text-muted); font-size: 12px; border-bottom: 1px solid var(--border); }
+.sessions-list td { padding: 4px 12px; border-bottom: 1px solid var(--bg-input); font-size: 13px; }
 .sessions-list tr[data-id] { cursor: pointer; }
 .sessions-list tr[data-id]:hover { background: var(--bg-panel); }
 .sessions-list td .session-actions { display: flex; gap: 8px; align-items: center; margin-top: 0; }
@@ -2607,7 +2607,7 @@ function onFilterChange() {
 }
 
 // ──────────────────── Versioning ────────────────────
-const PWA_VERSION = '1.22.6';
+const PWA_VERSION = '1.22.7';
 const MIN_SERVER_VERSION = '1.0.0';
 
 function parseVersion(v) {

frontend/sw.js

@@ -1,4 +1,4 @@
-const CACHE = 'simtrace-analyser-v38';
+const CACHE = 'simtrace-analyser-v39';
 
 const PRECACHE = [
     'index.html',