fix(desktop): use Tailwind 500 colors for dev dock icon border

[saddlepaddle]

Summary

• Replace custom HSL color generation with Tailwind CSS 500-level palette for the dev workspace dock icon border
• Deterministically pick from all 22 Tailwind 500 colors (hash(workspaceName) % colors.length) instead of generating arbitrary HSL hues
• Add OKLCH→sRGB conversion since Tailwind v4 exports OKLCH color strings and we need RGB for bitmap drawing

Test plan

• bun run lint:fix — clean
• bun run typecheck — passes (18/18)
• bun test — 1218 pass, 0 fail
• Visually verify dock icon border colors across different workspace names in dev mode

Summary by CodeRabbit

• Styling
  • Updated dock icon coloring system to use a standardized color palette, improving consistency across workspace identification. Icons now derive colors from workspace names with a refined visual appearance.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

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📝 Walkthrough

Walkthrough

The dock icon color generation logic is refactored to select from a predefined Tailwind 500 color palette using a deterministic integer hash instead of computing HSL values. OKLCH color space parsing and conversion to sRGB replaces the previous HSL-to-RGB pipeline, with new utility functions supporting hash generation and color space transformations.

Changes

Cohort / File(s)	Summary
Dock Icon Color Generation apps/desktop/src/main/lib/dock-icon.ts	Replaces HSL-based color generation with Tailwind 500 color palette selection via integer hashing. Adds OKLCH-to-sRGB color space conversion utilities and a preprocessed constant array of Tailwind 500 colors. Implements new helper functions: hashString, parseOklch, and oklchToRgb. Updates logging to report RGB values instead of hue.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~20 minutes

Possibly related PRs

• feat(desktop): color dock icon and label per workspace #1478: Directly modifies the same dock-icon implementation, replacing hue-based hashing and HSL pipeline with deterministic integer hash and Tailwind OKLCH→sRGB color selection.

Poem

🐰 A rabbit hops through color space so grand,
From hue to Tailwind, hand in paw hand,
OKLCH whispers secrets to RGB's ears,
Hash and palette, no more sundry fears,
Dock icons bloom in Tailwind's vibrant cheer! 🎨

🚥 Pre-merge checks | ✅ 4

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and specifically describes the main change: replacing custom color generation with Tailwind 500 colors for the dock icon border.
Description check	✅ Passed	The PR description is well-structured with a clear summary, test plan, and technical details, though it lacks some template sections like Related Issues and explicit Type of Change.
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%.
Merge Conflict Detection	✅ Passed	✅ No merge conflicts detected when merging into main

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✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch consistent-color

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[github-actions]

🧹 Preview Cleanup Complete

The following preview resources have been cleaned up:

• ✅ Neon database branch
• ⚠️ Electric Fly.io app
• ⚠️ Streams Fly.io app

Thank you for your contribution! 🎉