fix(ci): restore editor line budget

src/renderer/src/components/editor/DiffViewer.tsx

@@ -29,6 +29,7 @@ import { buildDiffEditorHideUnchangedOptions } from './diff-editor-hide-unchange
 import { useDiffEditorRegistration } from './diff-navigation-context'
 import { preserveDiffViewStateAcrossModelSwaps } from './diff-model-swap-view-state'
 import { monacoFindOptions } from './monaco-find-options'
+import { resolveDocumentTheme } from '@/lib/document-theme'
 
 export default function DiffViewer({
   modelKey,
@@ -66,11 +67,8 @@ export default function DiffViewer({
     () => (allDiffComments ?? []).filter((c) => c.filePath === relativePath && isDiffComment(c)),
     [allDiffComments, relativePath]
   )
-  const terminalFontSize = settings?.terminalFontSize ?? 13
-  const diffEditorFontSize = computeDiffEditorFontSize(terminalFontSize, editorFontZoomLevel)
-  const isDark =
-    settings?.theme === 'dark' ||
-    (settings?.theme === 'system' && window.matchMedia('(prefers-color-scheme: dark)').matches)
+  const terminalFontSize = settings?.terminalFontSize ?? 13,
+    diffEditorFontSize = computeDiffEditorFontSize(terminalFontSize, editorFontZoomLevel)
 
   const diffEditorRef = useRef<editor.IStandaloneDiffEditor | null>(null)
   const { registerDiffEditor, unregisterDiffEditor } = useDiffEditorRegistration()
@@ -411,7 +409,7 @@ export default function DiffViewer({
             language={language}
             original={originalContent}
             modified={modifiedContent}
-            theme={isDark ? 'vs-dark' : 'vs'}
+            theme={resolveDocumentTheme(settings?.theme ?? 'light') ? 'vs-dark' : 'vs'}
             onMount={handleMount}
             // Why: key models by tab identity and preserve the modified undo stack across Changes-mode HEAD rotations.
             originalModelPath={currentDiffModelPaths.originalModelPath}