First public release

• feat: Open .xlsx, .xlsm, .csv and .tsv files, by dialog, drag and drop, or from Finder
• feat: Save as .xlsx, and export a sheet as .csv
• feat: Almost 500 Excel functions with a function menu, live formula preview and AutoSum
• feat: Bold, italic, underline, text and fill colors, alignment, number formats and merged cells
• feat: Keyboard navigation, copy and paste with other spreadsheet apps, column auto-fit and multiple sheets
• feat: Each workbook opens in its own window; on macOS the app stays in the Dock when the last one closes
• feat: Sum, average and count of the selected range
• feat: Built-in MCP server over Streamable HTTP and stdio, with ready-made setup for Claude, Cursor, VS Code, Windsurf, Gemini CLI and Codex CLI
• feat: AI edits go into the normal undo history
• feat: Installers for Windows (.exe, .msi) and Linux (.deb, .AppImage, .rpm)
• docs: Build instructions for macOS, Windows and Linux