style(markers): render parked pastel square ~2/3 size (still zoom-scaled)

Parked squares now scale to ~0.66 of the moving-now circle (compounding with
the existing zoom scaling) so they read as quieter 'recent activity' markers.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

README.md

@@ -8,7 +8,7 @@ trips** into one view for the Fireside Communications / Tracksolid fleet.
   address, heading, odometer, last fix, source). Markers **scale with the zoom level**.
   Shape encodes recency so stakeholders read activity at a glance:
   - **● circle** (full colour + heading arrow) — moving right now
-  - **■ square** (pastel colour, no arrow) — active within the last 24h, now stopped
+  - **■ smaller square** (pastel colour, no arrow) — active within the last 24h, now stopped
   - **grey ●** — offline (no fix in 24h)
 - **Filters** (bottom-right card) apply to the live map *instantly*:
   - **Number plate** — multi-select, sorted A→Z; picking a vehicle auto-fills its

index.html

@@ -203,9 +203,11 @@
   }
   .veh-pin .idle-dot { width: 8px; height: 8px; border-radius: 50%; background: rgba(255,255,255,.92); }
   /* Parked = reported within 24h ("active within 24h"): a clean PASTEL
-     department-coloured SQUARE (same 32px, no arrow/dot), so high-level viewers
-     can scan recent fleet activity by department. Moving-now stays a circle. */
-  .veh-marker.parked  .veh-pin { border-radius: 6px; opacity: 1; }
+     department-coloured SQUARE, no arrow/dot, and rendered ~⅔ the size of a
+     moving-now circle so it reads as a quieter "recent activity" marker. The
+     scale compounds with the zoom scaling on .veh-inner; transform-origin
+     centre keeps it on its coordinate. */
+  .veh-marker.parked  .veh-pin { border-radius: 6px; opacity: 1; transform: scale(0.66); transform-origin: center center; }
   .veh-marker.offline .veh-pin { opacity: .5; border-color: rgba(255,255,255,.4); }
   .veh-plate {
     position: absolute; top: 33px; left: 50%; transform: translateX(-50%);