#185 [Bug]: Border frame toggle shifts coordinate labels in Advanced FEN preview

[Anonymous]

Originally created by: BilgeGates
Originally owned by: BilgeGates

What happened?

Toggling the border frame in the Advanced FEN export panel causes coordinate labels to shift position in the preview boards.

Steps to reproduce

1. Go to /advanced-fen
2. Add one or more FENs
3. Toggle the border frame on and off in the export panel
4. Observe the coordinate label positions in the preview

Expected

Coordinate labels remain aligned regardless of the border frame state.

Actual

Labels visibly shift when the border frame is toggled.

Root cause

The coordinate drawing logic in coordinateCalculations.ts does not consistently account for the frame offset applied in canvasRenderer.ts when the border frame is toggled.

Browser & OS

Any browser / OS.

Before submitting

• [x] I searched existing issues and this is not a duplicate.

[Anonymous]

• assigned_to: BilgeGates