perf(geoportal): zoom-dependent UAT simplification + Martin config + tile cache

PostGIS:
- gis_uats view: ST_SimplifyPreserveTopology(geom, 50) + only name/county/siruta
- gis_uats_simple view: ST_SimplifyPreserveTopology(geom, 500) for z0-z9

Martin config (martin.yaml):
- Explicit source definitions (auto_publish: false)
- gis_uats_simple (z0-9): only name+siruta, 500m simplified geometry
- gis_uats (z0-14): name+siruta+county, 50m simplified
- gis_terenuri (z10-18): object_id+siruta+cadastral_ref+area_value+layer_id
- gis_cladiri (z12-18): same properties
- 24h cache headers on all tiles

MapViewer:
- Dual UAT sources: simplified (z0-9) + detailed (z9+) with seamless handoff
- Zoom-interpolated paint: thin lines at z5, thicker at z12
- UAT labels only z9+, fill opacity z-interpolated (0.03→0.08)

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

src/modules/geoportal/components/map-viewer.tsx

@@ -34,6 +34,7 @@ const DEFAULT_ZOOM = 7;
 
 /** Source/layer IDs used on the map */
 const SOURCES = {
+  uatsSimple: "gis_uats_simple",
   uats: "gis_uats",
   terenuri: "gis_terenuri",
   cladiri: "gis_cladiri",
@@ -41,6 +42,8 @@ const SOURCES = {
 
 /** Map layer IDs (prefixed to avoid collisions) */
 const LAYER_IDS = {
+  uatsSimpleFill: "layer-uats-simple-fill",
+  uatsSimpleLine: "layer-uats-simple-line",
   uatsFill: "layer-uats-fill",
   uatsLine: "layer-uats-line",
   uatsLabel: "layer-uats-label",
@@ -232,7 +235,7 @@ export const MapViewer = forwardRef<MapViewerHandle, MapViewerProps>(
       if (!map || !map.isStyleLoaded()) return;
 
       const mapping: Record<string, string[]> = {
-        uats: [LAYER_IDS.uatsFill, LAYER_IDS.uatsLine, LAYER_IDS.uatsLabel],
+        uats: [LAYER_IDS.uatsSimpleFill, LAYER_IDS.uatsSimpleLine, LAYER_IDS.uatsFill, LAYER_IDS.uatsLine, LAYER_IDS.uatsLabel],
         terenuri: [LAYER_IDS.terenuriFill, LAYER_IDS.terenuriLine],
         cladiri: [LAYER_IDS.cladiriFill, LAYER_IDS.cladiriLine],
       };
@@ -278,11 +281,51 @@ export const MapViewer = forwardRef<MapViewerHandle, MapViewerProps>(
 
       /* ---- Add Martin sources + layers on load ---- */
       map.on("load", () => {
-        // --- UAT boundaries ---
+        // --- UAT boundaries (simplified, low zoom z0-z9) ---
+        map.addSource(SOURCES.uatsSimple, {
+          type: "vector",
+          tiles: [`${resolvedMartinUrl}/${SOURCES.uatsSimple}/{z}/{x}/{y}`],
+          minzoom: 0,
+          maxzoom: 9,
+        });
+
+        map.addLayer({
+          id: LAYER_IDS.uatsSimpleFill,
+          type: "fill",
+          source: SOURCES.uatsSimple,
+          "source-layer": SOURCES.uatsSimple,
+          maxzoom: 9,
+          paint: {
+            "fill-color": "#8b5cf6",
+            "fill-opacity": [
+              "interpolate", ["linear"], ["zoom"],
+              5, 0.03,
+              8, 0.05,
+            ],
+          },
+        });
+
+        map.addLayer({
+          id: LAYER_IDS.uatsSimpleLine,
+          type: "line",
+          source: SOURCES.uatsSimple,
+          "source-layer": SOURCES.uatsSimple,
+          maxzoom: 9,
+          paint: {
+            "line-color": "#7c3aed",
+            "line-width": [
+              "interpolate", ["linear"], ["zoom"],
+              5, 0.5,
+              8, 1,
+            ],
+          },
+        });
+
+        // --- UAT boundaries (detailed, high zoom z9+) ---
         map.addSource(SOURCES.uats, {
           type: "vector",
           tiles: [`${resolvedMartinUrl}/${SOURCES.uats}/{z}/{x}/{y}`],
-          minzoom: 0,
+          minzoom: 9,
           maxzoom: 16,
         });
 
@@ -291,9 +334,14 @@ export const MapViewer = forwardRef<MapViewerHandle, MapViewerProps>(
           type: "fill",
           source: SOURCES.uats,
           "source-layer": SOURCES.uats,
+          minzoom: 8,
           paint: {
             "fill-color": "#8b5cf6",
-            "fill-opacity": 0.05,
+            "fill-opacity": [
+              "interpolate", ["linear"], ["zoom"],
+              8, 0.03,
+              12, 0.08,
+            ],
           },
         });
 
@@ -302,9 +350,15 @@ export const MapViewer = forwardRef<MapViewerHandle, MapViewerProps>(
           type: "line",
           source: SOURCES.uats,
           "source-layer": SOURCES.uats,
+          minzoom: 9,
           paint: {
             "line-color": "#7c3aed",
-            "line-width": 1.5,
+            "line-width": [
+              "interpolate", ["linear"], ["zoom"],
+              5, 0.5,
+              8, 1,
+              12, 2,
+            ],
           },
         });
 
@@ -313,9 +367,14 @@ export const MapViewer = forwardRef<MapViewerHandle, MapViewerProps>(
           type: "symbol",
           source: SOURCES.uats,
           "source-layer": SOURCES.uats,
+          minzoom: 9,
           layout: {
             "text-field": ["coalesce", ["get", "name"], ["get", "uat_name"], ""],
-            "text-size": 12,
+            "text-size": [
+              "interpolate", ["linear"], ["zoom"],
+              9, 10,
+              14, 14,
+            ],
             "text-anchor": "center",
             "text-allow-overlap": false,
           },
@@ -431,6 +490,7 @@ export const MapViewer = forwardRef<MapViewerHandle, MapViewerProps>(
         LAYER_IDS.terenuriFill,
         LAYER_IDS.cladiriFill,
         LAYER_IDS.uatsFill,
+        LAYER_IDS.uatsSimpleFill,
       ];
 
       map.on("click", (e) => {