fix(geoportal): simplify building labels — show full cadastral_ref

Previous index-of/slice expression wasn't rendering. Simplified to
just show the full cadastral_ref (e.g. "77102-C1") as-is. MapLibre
auto-hides overlapping labels. This is a diagnostic step to verify
the tile property is accessible.

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

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

@@ -439,24 +439,23 @@ export const MapViewer = forwardRef<MapViewerHandle, MapViewerProps>(
           paint: { "fill-color": "#3b82f6", "fill-opacity": 0.5 } });
         map.addLayer({ id: LAYER_IDS.cladiriLine, type: "line", source: SOURCES.cladiri, "source-layer": SOURCES.cladiri, minzoom: 14,
           paint: { "line-color": "#1e3a5f", "line-width": 0.6 } });
-        // Building body labels (C1, C2...) — only at high zoom to avoid clutter
-        // cadastral_ref format: "77102-C1" → show "C1"
-        // Uses regex-like approach: if contains "-", show everything after last "-"
-        map.addLayer({ id: LAYER_IDS.cladiriLabel, type: "symbol", source: SOURCES.cladiri, "source-layer": SOURCES.cladiri, minzoom: 16,
-          filter: ["all",
-            ["has", "cadastral_ref"],
-            ["!=", ["index-of", "-", ["coalesce", ["get", "cadastral_ref"], ""]], -1],
-          ],
+        // Building body labels (C1, C2...) — visible at high zoom
+        // cadastral_ref = "77102-C1" → display "C1"
+        map.addLayer({
+          id: LAYER_IDS.cladiriLabel,
+          type: "symbol",
+          source: SOURCES.cladiri,
+          "source-layer": SOURCES.cladiri,
+          minzoom: 16,
+          filter: ["has", "cadastral_ref"],
           layout: {
-            "text-field": ["slice",
-              ["coalesce", ["get", "cadastral_ref"], ""],
-              ["+", ["index-of", "-", ["coalesce", ["get", "cadastral_ref"], ""]], 1],
-            ],
+            // Simple approach: show full cadastral_ref, let the user see "77102-C1"
+            // MapLibre will auto-hide overlapping labels
+            "text-field": ["get", "cadastral_ref"],
             "text-font": ["Noto Sans Regular"],
-            "text-size": 11,
+            "text-size": 10,
             "text-anchor": "center",
-            "text-allow-overlap": true,
-            "text-ignore-placement": false,
+            "text-allow-overlap": false,
           },
           paint: {
             "text-color": "#1e3a8a",