Scroll area scroll improvements part 2

[kotAPI]

Summary by CodeRabbit

• New Features
  • Added export support for a new ScrollArea component.
  • Enhanced ScrollArea with animated fast scrolling and a minimum thumb height.
  • Enabled continuous scrolling by holding down the scrollbar.
  • Introduced drag-to-scroll functionality for the scrollbar thumb.
• Improvements
  • SandboxEditor now remembers dark mode preference using local storage.
  • ScrollArea stories now feature more scrollable content for better demonstration.
• Style
  • Updated scrollbar and thumb colors, and improved hover effects for better visual feedback.

[coderabbitai]

Caution

Review failed

The pull request is closed.

Walkthrough

This update enhances the ScrollArea UI component with smooth animated scrolling, drag support for the scroll thumb, and continuous scrolling when the scrollbar is held. It also updates the package export for ScrollArea, improves the SandboxEditor dark mode persistence, and refines related styles and story content for better demonstration and usability.

Changes

File(s)	Change Summary
package.json	Added export entry for ./ScrollArea pointing to the built component.
src/components/tools/SandboxEditor/SandboxEditor.tsx	Dark mode state now initializes from and syncs to localStorage; container uses min-h-screen instead of h-screen.
src/components/ui/ScrollArea/fragments/ScrollAreaRoot.tsx	Thumb height capped at 24px; added smooth animated scroll with fastScrollTo; updated scroll logic.
src/components/ui/ScrollArea/fragments/ScrollAreaScrollbar.tsx	Added continuous scrolling on scrollbar hold using mouse events and interval timers.
src/components/ui/ScrollArea/fragments/ScrollAreaThumb.tsx	Added drag support for scroll thumb with mouse tracking and scroll updates.
src/components/ui/ScrollArea/stories/ScrollArea.stories.tsx	Story now renders repeated scrollable content blocks; removed fixed sizing classes.
styles/themes/components/scroll-area.scss	Refined scrollbar and thumb styles, added hover states, nested thumb styling under scrollbar.

Sequence Diagram(s)

sequenceDiagram
    participant User
    participant Scrollbar
    participant Thumb
    participant Viewport

    User->>Scrollbar: MouseDown (outside thumb)
    Scrollbar->>Viewport: Scroll (immediate)
    Note right of Scrollbar: After 300ms, starts interval
    User->>Scrollbar: Hold mouse
    Scrollbar->>Viewport: Scroll repeatedly (every 50ms)
    User->>Scrollbar: MouseUp/Leave
    Scrollbar-->>Viewport: Stop scrolling

    User->>Thumb: MouseDown (on thumb)
    Thumb->>Thumb: Record initial mouse Y and scrollTop
    User->>Thumb: MouseMove (drag)
    Thumb->>Viewport: Update scrollTop based on drag delta
    User->>Thumb: MouseUp
    Thumb->>Thumb: End drag, restore styles

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Possibly related PRs

• Add building blocks for scroll area component #1107: Introduces foundational ScrollArea component exports and fragments, which the current PR extends and enhances.
• Scroll Click POC #1109: Adds basic click handler for scrollbar clicks; the current PR builds upon this by introducing animation and continuous scroll.

Suggested labels

automerge

Poem

A scroll so smooth, a thumb that glides,
Now drag, now hold—see how it rides!
With colors bright and stories long,
The ScrollArea sings a brand new song.
Dark mode remembers, styles refined,
Hooray for features so well-designed!
🐇✨

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📥 Commits

Reviewing files that changed from the base of the PR and between 6a09913 and 05c158b.

📒 Files selected for processing (7)

• package.json (1 hunks)
• src/components/tools/SandboxEditor/SandboxEditor.tsx (1 hunks)
• src/components/ui/ScrollArea/fragments/ScrollAreaRoot.tsx (2 hunks)
• src/components/ui/ScrollArea/fragments/ScrollAreaScrollbar.tsx (1 hunks)
• src/components/ui/ScrollArea/fragments/ScrollAreaThumb.tsx (1 hunks)
• src/components/ui/ScrollArea/stories/ScrollArea.stories.tsx (1 hunks)
• styles/themes/components/scroll-area.scss (1 hunks)

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