v0.6.1

[0.6.1] - 2026-05-28

• chore: bump to 0.6.1
• fix(render): match palette swatch with Tonemapping::None on main camera
• feat(color): shift-click swatches for multi-color dithered fills
• fix(icon): macOS squircle + safe area master at 1024×1024
• feat(edit): double / halve density + blue info toasts
• docs: backfill Unreleased with post-0.6.0 changes
• fix(ui): toasts fade uniformly with multiply_opacity
• feat(ui): click-to-toggle shape picker + tight new-project modal
• feat(ui): coral brand accent + always-expanded section headers
• feat(gizmo): etched cube with muted face colors + grout lines
• docs: finalize CHANGELOG for v0.6.0 [skip ci]