fix(geoportal): simplified info panel, preserve basemap zoom, DXF export, intravilan outline

- Feature panel: simplified (NR_CAD/NR_CF/SIRUTA/Suprafata/Proprietari),
  aligned top-right under basemap switcher, click empty space to close
- Basemap switch: preserves zoom+center via viewStateRef + moveend listener
- DXF export: use -s_srs + -t_srs (not -a_srs + -t_srs which ogr2ogr rejects)
- Intravilan: double line (black outer + orange inner), z13+, no fill
- Parcel labels: cadastral_ref shown at z16+
- UAT z12: original geometry (no simplification)
- Removed MapLibre popup (only side panel)

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

src/app/api/geoportal/export/route.ts

@@ -133,17 +133,10 @@ export async function POST(req: Request) {
     const outputPath = join(tmpDir, `output.${ext}`);
     const ogrFormat = format === "dxf" ? "DXF" : "GPKG";
 
-    // For DXF, convert to WGS84 (architects expect it). For GPKG keep native CRS.
-    const ogrArgs = [
-      "-f", ogrFormat,
-      outputPath,
-      inputPath,
-      "-a_srs", "EPSG:3844",
-    ];
-
-    if (format === "dxf") {
-      ogrArgs.push("-t_srs", "EPSG:4326");
-    }
+    // DXF: reproject to WGS84 (-s_srs + -t_srs). GPKG: assign CRS only (-a_srs).
+    const ogrArgs = format === "dxf"
+      ? ["-f", ogrFormat, outputPath, inputPath, "-s_srs", "EPSG:3844", "-t_srs", "EPSG:4326"]
+      : ["-f", ogrFormat, outputPath, inputPath, "-a_srs", "EPSG:3844"];
 
     try {
       await execFileAsync("ogr2ogr", ogrArgs, { timeout: 30_000 });