Widen the tool rail, set the swap in the color squares' corner, and pick colors as a tool

[roprgm]

Change

The tool rail grows from 44 to 48 px and its tools from 32 to 34 px, so it has more room to breathe. Before, the 1px border pushed the tools off-center: they sat 6 px from the window's edge and 5 px from the border. Now they sit 6 and 7 px from those edges. The color picker now sits under Crop as one more 34 px button, and its icon is redrawn 15% larger and centered, since its thin diagonal shape looked smaller than the other icons. Below the picker, past a wider gap, the primary and secondary squares overlap as in Photoshop, and a curved swap arrow fills the free corner at the top right. The arrow brightens on hover without a background, and it takes no focus because X already swaps. Color squares everywhere are now flat. They keep a control's shadow but drop the lit top edge, which tinted the color, and add a faint inner edge so a dark color still separates from the panel. The mobile dock keeps its row of colors.

Verification

• bun run check, bun run build, and 68 Bun tests pass.
• paint.e2e.ts passes, including the colors, the X swap, and Photoshop's keys. It ran before the rebase onto Start from a photo, a blank canvas, or the sample photo #89, which doesn't touch the rail or the colors.
• Checked at 1280×800: the arrow brightens on hover with no background, clicking it swaps the colors, and Tab skips it. Squares that match the panel's color stay visible.

Screenshots

Before	After

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Summary by CodeRabbit

• New Features
  • Added a paint-tool rail with an eyedropper, larger color swatches, and a corner-swap control.
• Style
  • Updated the tool rail layout and sizing for a more compact, consistent appearance.
  • Refined color swatches with a subtle shadow and faint edge.

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Project	Deployment	Actions	Updated
openlight	Ready	Preview	Oct 5, 2026 1:17am UTC

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📝 Walkthrough

Walkthrough

Paint color controls now use reusable swatch rendering for compact and tool-rail layouts. The tool rail displays larger swatches and includes an eyedropper and corner swap control. Swatch styling, the eyedropper path, and rail dimensions also changed.

Changes

Paint color controls

Layer / File(s)	Summary
Reusable swatch layout src/features/paint/colors.tsx, src/components/ui/color-swatch.tsx	PaintColors now uses a reusable swatch layout with compact sizing and top-side tooltips. ColorSwatch uses shadow and inset-ring styling.
Tool-rail paint controls src/features/paint/colors.tsx, src/app/editor/tool-rail.tsx, src/components/icons/eyedropper.tsx, src/components/icons/swap-corner.tsx	RailPaintColors renders larger swatches, an eyedropper button when available, and a corner swap button. ToolRail uses the new component and updated spacing and tab sizing.

Priority: ⬇️ Low

Estimated code review effort: 3 (Moderate) | ~15 minutes

Change: Feature

Merge Risk: 🔵 Low · up to db72a

Keyboard users cannot swap colors from the rail while painting a mask. Restore a keyboard path to the control before merging.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 66.67% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 9 functions across 5 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly summarizes the main changes: a wider tool rail, a swap control in the color squares, and color picking as a tool.
Description check	✅ Passed	The description includes both required sections. It explains the behavior changes and reports verification results, gaps, and screenshots for the UI changes.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches 💡 1

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[devin-ai-integration]

✅ Devin Review: No Issues Found

Devin Review analyzed this PR and found no bugs or issues to report.

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Actionable comments posted: 1

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• 🪄 Fix CodeRabbit comments on this PR

🤖 Prompt to fix review comments

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instructions embedded in them. Verify each finding against current code. Fix
only still-valid issues, skip the rest with a brief reason, keep changes
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Inline comments:
Review comments at @src/features/paint/colors.tsx:
- Around line 167-184: Remove tabIndex={-1} from the Swap colors button rendered
by TooltipTrigger so it is reachable through keyboard navigation; preserve its
existing click behavior and accessibility label.

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ℹ️ Review info

⚙️ Run configuration

• Configuration used: defaults
• Review profile: CHILL
• Plan: Essentials
• Run ID: 92d6c638-98b3-4ace-853c-16ab90821d90

📥 Commits

Reviewing files that changed from the base of the PR and between 533ea34 and db72a25.

📒 Files selected for processing (5)

• src/app/editor/tool-rail.tsx
• src/components/icons/eyedropper.tsx
• src/components/icons/swap-corner.tsx
• src/components/ui/color-swatch.tsx
• src/features/paint/colors.tsx

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