feat(reports): occupancy curve, hour×dow heatmap, stay histogram, fraud KPIs

The dashboard had generic BI views but nothing parking-shaped. Added:

- Occupancy step-area over the range with the configured capacity as a
  red reference line. occupancyStart folds the ENTIRE prior ledger
  (voided entries excluded, clamped ≥0); each series point carries
  occupancyEnd. Answers "when are we near full".
- Entries heatmap hour × day-of-week (7×24, row 0 = Monday, site tz) as
  a pure CSS-grid intensity map — weekday-vs-weekend at a glance, the
  direct evidence for tariff windows. Replaces the flat hour histogram
  (strictly contains it).
- Stay-duration histogram at tariff-shaped edges (30m/1h/2h/4h/8h/24h/
  tail): where ladder/up-to breakpoints should sit.
- Voids + anomalies KPIs (accented when >0) — the look-closer counters
  the signed chain exists for; peak-occupancy KPI (peak / capacity).
- Revenue bars stacked cash vs card (the drawer's money vs the bank's);
  CSV export gains cash, card, occupancy_end columns.

Internals: localParts caches its Intl formatter per tz (was one new
formatter per ledger row); @parking/db re-exports lt/gt. 5 new tests.

Claude-Session: https://claude.ai/code/session_01Xcm6ikLgGoCxxHrxtjkk5V

apps/server/src/routes/reports.ts

@@ -48,9 +48,18 @@ export async function reportRoutes(app: FastifyInstance, db: Db): Promise<void>
     async (req, reply) => {
       const summary = reportSummary(db, parseQuery(req.query));
       const lines = [
-        "bucket,entries,exits,payments,revenue",
+        "bucket,entries,exits,payments,revenue,cash,card,occupancy_end",
         ...summary.series.map((p) =>
-          [p.bucket, p.entries, p.exits, p.payments, (p.revenueMinor / 100).toFixed(2)].join(","),
+          [
+            p.bucket,
+            p.entries,
+            p.exits,
+            p.payments,
+            (p.revenueMinor / 100).toFixed(2),
+            (p.cashMinor / 100).toFixed(2),
+            (p.cardMinor / 100).toFixed(2),
+            p.occupancyEnd,
+          ].join(","),
         ),
       ];
       reply