fix: use default cursor on diff scrollbar

packages/diff-view/src/parts/RenderCss/RenderCss.ts

@@ -454,6 +454,7 @@ ${getEmptyLineNumberCss(newState.visibleLinesLeft, newState.visibleLinesRight, i
   background-color: rgba(128, 128, 128, 0.15);
   background-image: var(--ScrollBarBackgroundImage);
   border-radius: 4px;
+  cursor: default;
   height: 100%;
   position: absolute;
   right: 2px;
@@ -464,7 +465,7 @@ ${getEmptyLineNumberCss(newState.visibleLinesLeft, newState.visibleLinesRight, i
 .DiffScrollBarThumb {
   background: rgba(128, 128, 128, 0.45);
   border-radius: 4px;
-  cursor: pointer;
+  cursor: default;
   height: var(--ScrollBarHeight);
   position: absolute;
   top: var(--ScrollBarThumbTop);

packages/e2e/src/diff.scrollbar-cursor.ts

@@ -0,0 +1,35 @@
+import type { Test } from '@lvce-editor/test-with-playwright'
+
+export const name = 'diff.scrollbar-cursor'
+
+export const test: Test = async ({ Command, DiffView, expect, FileSystem, Locator, Workspace }) => {
+  const tmpDir = await FileSystem.getTmpDir()
+  const content = Array.from({ length: 900 }, (_, index) => `shared line ${index + 1}`).join('\n')
+  await FileSystem.writeFile(`${tmpDir}/before.txt`, `${content}\nbottom before`)
+  await FileSystem.writeFile(`${tmpDir}/after.txt`, `${content}\nbottom after`)
+  await Workspace.setPath(tmpDir)
+  await DiffView.open(`${tmpDir}/before.txt`, `${tmpDir}/after.txt`)
+
+  const scrollBar = Locator('.DiffScrollBar')
+  const scrollBarThumb = Locator('.DiffScrollBarThumb')
+  for (const mode of ['side-by-side', 'inline'] as const) {
+    await Command.execute('DiffView.setDiffMode', mode)
+    await expect(scrollBar).toHaveCSS('cursor', 'default')
+    await expect(scrollBarThumb).toHaveCSS('cursor', 'default')
+
+    const diffRows = Locator(mode === 'inline' ? '.InlineDiffEditor .DiffEditorRows' : '.DiffEditorContentLeft .DiffEditorRows')
+    await diffRows.dispatchEvent('wheel', {
+      bubbles: true,
+      deltaMode: 0,
+      deltaY: 9_999_999,
+    } as unknown as string)
+
+    await expect(diffRows).toContainText('bottom before')
+    if (mode === 'inline') {
+      await expect(diffRows).toContainText('bottom after')
+    } else {
+      const rightRows = Locator('.DiffEditorContentRight .DiffEditorRows')
+      await expect(rightRows).toContainText('bottom after')
+    }
+  }
+}