perf(geoportal): 4-level UAT simplification + intravilan layer + preserve view on basemap switch

UAT zoom-dependent views (read-only, original geom NEVER modified):
- gis_uats_z0 (z0-5): 2000m simplification — country outlines
- gis_uats_z5 (z5-8): 500m — regional overview
- gis_uats_z8 (z8-12): 50m — county/city level with labels
- gis_uats_z12 (z12+): 10m — near-original precision

New layers:
- gis_administrativ (intravilan, arii speciale) — orange dashed, no simplification
- Toggle in layer panel (off by default)

Basemap switching:
- Now preserves current center + zoom when switching between basemaps

Parcels + buildings: NO simplification (exact geometry needed)

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

martin.yaml

@@ -1,36 +1,82 @@
 # Martin v0.15 configuration — optimized tile sources for ArchiTools Geoportal
 # All geometries are EPSG:3844 (Stereo70). Bounds are approximate Romania extent.
+# Original table data is NEVER modified — views compute simplification on-the-fly.
 
-# Disable auto-discovery — only serve explicitly configured sources
 postgres:
   connection_string: ${DATABASE_URL}
   default_srid: 3844
   auto_publish: false
   tables:
-    gis_uats:
+    # ── UAT boundaries: 4 zoom-dependent simplification levels ──
+
+    gis_uats_z0:
       schema: public
-      table: gis_uats
+      table: gis_uats_z0
       geometry_column: geom
       srid: 3844
       bounds: [20.2, 43.5, 30.0, 48.3]
       minzoom: 0
-      maxzoom: 14
+      maxzoom: 5
       properties:
         name: text
         siruta: text
 
-    gis_uats_simple:
+    gis_uats_z5:
       schema: public
-      table: gis_uats_simple
+      table: gis_uats_z5
       geometry_column: geom
       srid: 3844
       bounds: [20.2, 43.5, 30.0, 48.3]
-      minzoom: 0
-      maxzoom: 9
+      minzoom: 5
+      maxzoom: 8
       properties:
         name: text
         siruta: text
 
+    gis_uats_z8:
+      schema: public
+      table: gis_uats_z8
+      geometry_column: geom
+      srid: 3844
+      bounds: [20.2, 43.5, 30.0, 48.3]
+      minzoom: 8
+      maxzoom: 12
+      properties:
+        name: text
+        siruta: text
+        county: text
+
+    gis_uats_z12:
+      schema: public
+      table: gis_uats_z12
+      geometry_column: geom
+      srid: 3844
+      bounds: [20.2, 43.5, 30.0, 48.3]
+      minzoom: 12
+      maxzoom: 16
+      properties:
+        name: text
+        siruta: text
+        county: text
+
+    # ── Administrativ (intravilan, arii speciale) — NO simplification ──
+
+    gis_administrativ:
+      schema: public
+      table: gis_administrativ
+      geometry_column: geom
+      srid: 3844
+      bounds: [20.2, 43.5, 30.0, 48.3]
+      minzoom: 10
+      maxzoom: 16
+      properties:
+        object_id: text
+        siruta: text
+        layer_id: text
+        cadastral_ref: text
+
+    # ── Terenuri (parcels) — NO simplification ──
+
     gis_terenuri:
       schema: public
       table: gis_terenuri
@@ -46,6 +92,8 @@ postgres:
         area_value: float8
         layer_id: text
 
+    # ── Cladiri (buildings) — NO simplification ──
+
     gis_cladiri:
       schema: public
       table: gis_cladiri