v0.6.5

[0.6.5] - 2026-06-01

• chore: bump to 0.6.5
• fix(macos): open .rox from Finder on a cold launch
• feat(tools): S-key cycles through shape primitives
• feat(io): import .vox palette as a new swatch palette
• fix(icons): white-fill globe.svg so selected Sphere tints correctly
• feat(shape): add Sphere primitive
• fix(ci): clear Linux-only clippy errors in floating menu
• docs: finalize CHANGELOG for v0.6.4 [skip ci]