fix(stloader): slow down shine animation interval for better UX

[AnnatarHe]

Summary

• Increase DefaultShineInterval from 32ms to 80ms in stloader/loader.go
• Makes the loading animation (~12 FPS) more comfortable to watch than the previous ~31 FPS

Test plan

• Build the CLI: go build -o shelltime ./cmd/cli/main.go
• Run a query: ./shelltime query "test" and observe the loading animation
• Verify the shine effect is slower and easier on the eyes

🤖 Generated with Claude Code

[gemini-code-assist]

Summary of Changes

Hello @AnnatarHe, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request focuses on refining the user experience of the application's loading animation. By modifying a single configuration value, the animation's speed is reduced, aiming to create a more comfortable and less visually demanding interaction for users during loading states.

Highlights

• Animation Speed Adjustment: The DefaultShineInterval in stloader/loader.go has been increased from 32ms to 80ms. This change effectively slows down the loading animation's shine effect from approximately 31 frames per second (FPS) to about 12 FPS.
• Improved User Experience: The primary goal of this adjustment is to enhance user comfort by making the loading animation less jarring and more pleasant to observe, as a slower animation rate is generally easier on the eyes.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

Flag	Coverage Δ
unittests	37.93% <ø> (?)

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
stloader/loader.go	93.85% <ø> (ø)

... and 2 files with indirect coverage changes

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[gemini-code-assist]

Code Review

This pull request effectively improves the user experience by slowing down the shine animation interval. The change is straightforward and well-justified. I have added one comment regarding an outdated code comment that should be updated to maintain code and documentation consistency.

[gemini-code-assist]

While you've correctly updated the default value, the corresponding comment for ShineInterval in the LoaderConfig struct (on line 36) is now outdated. It still refers to the old default of 32ms.

Please update it to reflect the new default of 80ms to avoid confusion for future developers using this package.

Suggested Change:

// stloader/loader.go:36
// ShineInterval is the time between color sweep updates (default: 80ms)

// stloader/loader.go:36
// ShineInterval is the time between color sweep updates (default: 80ms)