🎯 Purpose: Visual material optimizer for woodworking, CNC, sheet metal. 1px = 1mm.

📥 Importing Parts

• SVG/PNG: Click button, select file. Images appear with original colors.
• Gray fill option: Select a part and check "Fill non-empty with gray" to convert colored areas to gray.
• Parts appear on canvas. You can drag, rotate (select +90°), duplicate, delete.
• Rename part: select it, enter name in right panel, click "Set".
• Resize: Select part, change Width/Height in right panel. Lock aspect ratio with checkbox.
• Kerf compensation: Kerf value is automatically applied to part dimensions when arranging.

⚙️ Material Settings (Left Panel)

• Sheet width/height (mm), cost, currency, kerf, margin, spacing.
• Kerf affects part spacing and automatic arrangement.

🖱️ Canvas Interaction

• Drag parts to move. Snap to grid (toggle).
• Select part → shows properties in right panel.
• Use zoom buttons, Fit, Reset view. Undo/Redo next to zoom.
• Measure: Click "Measure", then two points on canvas – shows ΔX, ΔY, distance.

🧮 Calculations & Kerf

• Used area automatically adjusts for transparent pixels in PNG/SVG.
• Kerf is applied to part dimensions when arranging to account for cut width.
• Shows mm², m², costs, efficiency.

📄 Export / Print (Right Sidebar)

• JSON / CSV: Export project data (with effective areas).
• PNG / SVG sheet: Save canvas as image or vector.
• Print A4 report: Prints canvas image + summary + parts table with costs and m².
• Print A4 grid: Tiles full-size sheet across multiple A4 pages.