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/web/src/lib/i18n/sq.ts

@@ -881,14 +881,23 @@ export const sq = {
       payments: "Pagesa",
       avgStay: "Qëndrim mes.",
       subscribers: "Abonentë",
+      peakOcc: "Zënia maksimale",
+      voids: "Bileta të anuluara",
+      anomalies: "Anomali",
     },
     chart: {
       flow: "Hyrjet & daljet me kalimin e kohës",
+      occupancy: "Zënia — makina brenda",
+      occupancySeries: "Makina brenda",
       revenue: "Të ardhurat ({{currency}})",
       mix: "Përbërja e të ardhurave",
-      peakHours: "Hyrjet sipas orës së ditës",
+      stay: "Kohëzgjatja e qëndrimit (sesione të mbyllura)",
+      heatmap: "Harta e hyrjeve — orë × ditë",
       breakdown: "Ndarja",
     },
+    capacityLine: "kapaciteti",
+    stay: { m: "m", h: "o" },
+    dowShort: ["Hën", "Mar", "Mër", "Enj", "Pre", "Sht", "Die"],
     mix: { ticket: "Tranzit", subSales: "Abonime", subWindow: "Jashtë orarit" },
     row: {
       cash: "Para në dorë",