New MCP tool `export_sch_dxf` wrapping `kicad-cli sch export dxf`: outputs one DXF per page into a directory. Exposes drawing-sheet override, theme, B&W, exclude-drawing-sheet, default-font, and page selection. schematicPath required; directory output uses outputDir. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>