fix(booking-edit): reconstruct pallet dims with 120x80 base (not a cube)

La reprise reconstruisait un cube (cbrt du volume) au lieu de la base palette
standard, d'ou des longueur/largeur/hauteur incorrectes. Pour une palette on
reconstitue desormais 120x80 cm et on deduit la hauteur du volume (ex: 0.96 CBM
-> 120x80x100). Les colis restent en cube equivalent.

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

apps/frontend/app/[locale]/dashboard/search-advanced/page.tsx

@@ -185,14 +185,33 @@ export default function AdvancedSearchPage() {
     // totals (the booking only stores totals, not individual packages).
     const q = pallets > 0 ? pallets : 1;
     const perVolM3 = vol > 0 ? vol / q : 0;
-    const sideCm = perVolM3 > 0 ? Math.cbrt(perVolM3) * 100 : 0;
+    const isPalette = pallets > 0;
+
+    // The booking only stores aggregate totals, not per-package dimensions. For
+    // pallets we reconstruct the standard EUR pallet footprint (120×80 cm) and
+    // derive the height from the volume — so a default 0.96 CBM pallet comes back
+    // as 120×80×100. For loose parcels we fall back to a cube of equal volume.
+    let length: number;
+    let width: number;
+    let height: number;
+    if (isPalette) {
+      length = 120;
+      width = 80;
+      const baseM2 = (length / 100) * (width / 100); // 0.96 m²
+      height = perVolM3 > 0 ? Math.round((perVolM3 / baseM2) * 100 * 100) / 100 : 100;
+    } else {
+      const sideCm = perVolM3 > 0 ? Math.round(Math.cbrt(perVolM3) * 100 * 100) / 100 : 0;
+      length = sideCm;
+      width = sideCm;
+      height = sideCm;
+    }
     const pkg = {
-      type: (pallets > 0 ? 'palette' : 'colis') as Package['type'],
+      type: (isPalette ? 'palette' : 'colis') as Package['type'],
       quantity: q,
-      length: sideCm,
+      length,
-      width: sideCm,
+      width,
-      height: sideCm,
+      height,
-      weight: wgt > 0 ? wgt / q : 0,
+      weight: wgt > 0 ? Math.round((wgt / q) * 100) / 100 : 0,
       stackable: true,
     };