feat(editor): Add rounded selection

[ije]

↓

Can be disabled by adding:

import { Editor } from "@pierre/diffs/editor"
const editor = new Editor({ roundedSelection: false })

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Project	Deployment	Actions	Updated (UTC)
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[Copilot]

Pull request overview

Adds configurable rounded selection rendering to the diffs editor, updating selection range rendering and CSS while also reorganizing nearby editor-related types.

Changes:

• Adds roundedSelection to EditorOptions.
• Reworks selection range rendering to support rounded-corner overlays.
• Adds CSS selectors for rounded selection corners and renames component option types.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 7 comments.

File	Description
packages/diffs/src/types.ts	Renames/reorders editor and component-related exported interfaces.
packages/diffs/src/editor/editor.ts	Adds rounded-selection option and rewrites selection rendering/caching logic.
packages/diffs/src/editor/css.ts	Adds CSS rules for rounded selection corner rendering.

Comments suppressed due to low confidence (1)

packages/diffs/src/types.ts:896

• Renaming the exported DiffsEditorOptions type without leaving an alias is a public API break: types.ts is re-exported from src/index.ts, and there are no remaining DiffsEditorOptions exports. Existing consumers importing this type will fail to compile even though this PR is about selection rendering.

export interface DiffsComponentOptions extends BaseCodeOptions {
  enableGutterUtility?: boolean;
  enableLineSelection?: boolean;
  expandUnchanged?: boolean;
  lineHoverHighlight?: 'disabled' | 'both' | 'number' | 'line';
}

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[amadeus]

lookin sharp!

[amadeus]

Would it be worth doing parseInt(lineNumber, 10) on this and error/silently fail if isNaN(line)?

[ije]

fixed