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DXF Export: - Add gpkgToDxf() helper using ogr2ogr -f DXF (non-fatal fallback) - export-local: terenuri.dxf, cladiri.dxf, terenuri_magic.dxf in ZIP - export-bundle: same DXF files alongside GPKGs - Zero overhead — conversion runs locally from DB data, no eTerra calls Hero Button Tooltips: - Hover shows ZIP contents: layer names, entity counts, sync dates - Base tooltip: "GPKG + DXF per layer" - Magic tooltip: "GPKG + DXF + CSV complet + Raport calitate" Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>