feat: finished phase 3

tests/renderer/components/GitDiffView.test.tsx

@@ -7,11 +7,14 @@ import { useAppStore } from '../../../src/renderer/store';
 vi.mock('@monaco-editor/react', () => ({
   __esModule: true,
   default: (_props: unknown) => null,
-  DiffEditor: (props: { original: string; modified: string; language?: string }) => (
+  DiffEditor: (props: { original: string; modified: string; language?: string; options?: Record<string, unknown> }) => (
     <div data-testid="monaco-diff-editor">
       <div>original:{props.original}</div>
       <div>modified:{props.modified}</div>
       <div>language:{props.language}</div>
+      <div>renderSideBySide:{String(props.options?.renderSideBySide)}</div>
+      <div>wordWrap:{String(props.options?.wordWrap)}</div>
+      <div>hideUnchanged:{String((props.options?.hideUnchangedRegions as { enabled?: boolean } | undefined)?.enabled)}</div>
     </div>
   ),
 }));
@@ -30,6 +33,11 @@ describe('GitDiffView', () => {
         createdAt: new Date().toISOString(),
         updatedAt: new Date().toISOString(),
       },
+      gitDiffPreferences: {
+        wordWrap: true,
+        viewStyle: 'inline',
+        hideUnchangedRegions: false,
+      },
     });
 
     (window as any).electronAPI = {
@@ -56,5 +64,8 @@ describe('GitDiffView', () => {
     expect((window as any).electronAPI.git.getDiffContent).toHaveBeenCalledWith('/repo/path', 'posts/first.md');
     expect(screen.getByText('original:# old line')).toBeInTheDocument();
     expect(screen.getByText('modified:# new line')).toBeInTheDocument();
+    expect(screen.getByText('renderSideBySide:false')).toBeInTheDocument();
+    expect(screen.getByText('wordWrap:on')).toBeInTheDocument();
+    expect(screen.getByText('hideUnchanged:false')).toBeInTheDocument();
   });
 });