fix(geoportal): proxy PMTiles through HTTPS + fix click/selection + optimize rebuild

PMTiles was loaded via HTTP from MinIO (10.10.10.166:9002) on an HTTPS page,
causing browser mixed-content blocking — parcels invisible on geoportal.

Fixes:
- tile-cache nginx proxies /pmtiles/ → MinIO with Range header support
- PMTILES_URL changed to relative path (resolves to HTTPS automatically)
- clickableLayers includes PMTiles fill layers (click on parcels works)
- Selection highlight uses PMTiles source at z13+ (was Martin z17+ only)
- tippecanoe per-layer zoom ranges (terenuri z13-z18, cladiri z14-z18)
  skips processing millions of features at z0-z12 — faster rebuild

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

scripts/rebuild-overview-tiles.sh

@@ -73,21 +73,23 @@ echo "[$(date -Iseconds)] Export complete."
 # ── Step 2: Generate PMTiles with tippecanoe ──
 echo "[$(date -Iseconds)] Generating PMTiles..."
 
+# Per-layer zoom ranges — avoids processing features at zoom levels where they won't appear
+# UAT boundaries: only at their respective zoom bands (saves processing z13-z18 for simple polygons)
+# Terenuri/Cladiri: only z13+/z14+ (the expensive layers skip z0-z12 entirely)
 tippecanoe \
   -o "$OUTPUT_FILE" \
-  --named-layer=gis_uats_z0:uats_z0.fgb \
-  --named-layer=gis_uats_z5:uats_z5.fgb \
-  --named-layer=gis_uats_z8:uats_z8.fgb \
-  --named-layer=gis_uats_z12:uats_z12.fgb \
-  --named-layer=gis_administrativ:administrativ.fgb \
-  --named-layer=gis_terenuri:terenuri_overview.fgb \
-  --named-layer=gis_cladiri:cladiri_overview.fgb \
-  --minimum-zoom=0 \
-  --maximum-zoom=18 \
+  -L'{"layer":"gis_uats_z0","file":"uats_z0.fgb","minzoom":0,"maxzoom":5}' \
+  -L'{"layer":"gis_uats_z5","file":"uats_z5.fgb","minzoom":5,"maxzoom":8}' \
+  -L'{"layer":"gis_uats_z8","file":"uats_z8.fgb","minzoom":8,"maxzoom":12}' \
+  -L'{"layer":"gis_uats_z12","file":"uats_z12.fgb","minzoom":12,"maxzoom":14}' \
+  -L'{"layer":"gis_administrativ","file":"administrativ.fgb","minzoom":10,"maxzoom":16}' \
+  -L'{"layer":"gis_terenuri","file":"terenuri_overview.fgb","minzoom":13,"maxzoom":18}' \
+  -L'{"layer":"gis_cladiri","file":"cladiri_overview.fgb","minzoom":14,"maxzoom":18}' \
   --base-zoom=18 \
   --drop-densest-as-needed \
   --detect-shared-borders \
   --simplification=10 \
+  --no-tile-stats \
   --hilbert \
   --force