#188 [Feature]: Square colour highlighting on the board

[Anonymous]

Originally created by: BilgeGates
Originally owned by: BilgeGates

What problem does this solve?

There is no way to mark key squares directly on the board. Coaches and puzzle authors who want to highlight a square must annotate a screenshot in an external tool, breaking the diagram creation flow.

Proposed solution

Right-click a square to cycle its fill colour: red → yellow → green → blue → none. Highlights are part of the annotation layer (see [#161]) and can be exported with the diagram via an opt-in in the Export panel.

Context

Sub-issue of [#161] — annotation layer. Scope: square highlighting only; arrows are tracked separately in [#189].

Before submitting

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

[Anonymous]

• assigned_to: BilgeGates