perf: hide basemap boundaries, remove UAT layers, optimize Martin minzoom

Basemap cleanup (after map load):
- Hide OpenFreeMap boundary/admin layers (redundant with our UATs)
- Keep city/town place labels, remove village-level
- Hide our Martin UAT layers (not needed in ParcelSync — filtered by siruta)

Martin tile optimization:
- gis_terenuri_status minzoom: 10 → 13 (parcels not visible below 13)
- gis_cladiri_status minzoom: 12 → 14 (buildings not visible below 14)
- Prevents unnecessary tile fetches at low zoom levels

Applied to both ParcelSync Harta tab and Portal map.
Requires docker restart martin.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/app/(portal)/portal/page.tsx

@@ -1242,6 +1242,36 @@ function HartaContent() {
       .catch(() => {});
   }, [selectedSiruta]);
 
+  // Hide basemap admin boundaries + our UAT layers
+  const cleanedBasemapRef = useRef(false);
+  useEffect(() => {
+    if (!mapReady) { cleanedBasemapRef.current = false; return; }
+    if (cleanedBasemapRef.current) return;
+    const map = asMap(mapHandleRef.current);
+    if (!map) return;
+    cleanedBasemapRef.current = true;
+    try {
+      const style = (map as unknown as { getStyle(): { layers?: { id: string }[] } }).getStyle();
+      if (style?.layers) {
+        for (const layer of style.layers) {
+          const id = layer.id.toLowerCase();
+          if (id.includes("boundary") || id.includes("admin") ||
+              (id.includes("place") && !id.includes("place-city") && !id.includes("place-town"))) {
+            map.setLayoutProperty(layer.id, "visibility", "none");
+          }
+        }
+      }
+    } catch { /* noop */ }
+    const uatLayers = [
+      "l-uats-z0-line", "l-uats-z5-fill", "l-uats-z5-line",
+      "l-uats-z8-fill", "l-uats-z8-line", "l-uats-z8-label",
+      "l-uats-z12-fill", "l-uats-z12-line", "l-uats-z12-label",
+    ];
+    for (const lid of uatLayers) {
+      try { if (map.getLayer(lid)) map.setLayoutProperty(lid, "visibility", "none"); } catch { /* noop */ }
+    }
+  }, [mapReady]);
+
   // When map becomes ready, fitBounds ONCE per siruta
   useEffect(() => {
     if (!mapReady || !boundsRef.current || !selectedSiruta) return;