v0.5.1

[0.5.1] - 2026-05-20

• chore: bump to 0.5.1
• refactor(tools): group tool_input_system params into SystemParams
• refactor(ui): tokenize inline spacing literals
• refactor(tools): extract stroke_anchor_from_hit helper
• refactor(clipboard): extract shared execute_paste helper
• feat(select): copy / cut / paste for selection
• ci: enforce CHANGELOG entry for feat/fix/perf PRs
• ci: add ui-tokens guard
• docs: add PR template + CONTRIBUTING guide
• chore: pin rust toolchain to 1.91.1
• chore: split git hooks into pre-commit (fmt) + pre-push (test)
• ci: add fmt + clippy jobs
• feat(updater): GitHub release update checker
• docs: trim CHANGELOG entry for color-space feature
• feat(ui): space-aware inspector readout + custom color picker
• feat(color): color-space conversions + Preferences pref
• feat(tools): shape aspect lock + long-press primitive picker
• docs: changelog + CLAUDE.md updates for sweep
• perf(tools): cache MoveDragState.originals_set
• refactor(io): dedup tmp_path test helper
• refactor(ui): promote inline literals to size/width/height tokens
• feat(camera): view-angle presets (Front/Back/Left/Right/Top/Iso)
• style: cargo fmt
• feat(select): double-click selects connected voxels, not AABB hull
• feat(ui): themed palette select dropdown
• chore: add release.sh helper script
• docs: finalize CHANGELOG for v0.5.0 [skip ci]