Refactor Settings, FileTree, GitPanel, Shell, and CodeEditor components (#402)

src/components/code-editor/view/CodeEditor.tsx

@@ -0,0 +1,234 @@
+import { EditorView } from '@codemirror/view';
+import { unifiedMergeView } from '@codemirror/merge';
+import type { Extension } from '@codemirror/state';
+import { useMemo, useState } from 'react';
+import { useTranslation } from 'react-i18next';
+import { useCodeEditorDocument } from '../hooks/useCodeEditorDocument';
+import { useCodeEditorSettings } from '../hooks/useCodeEditorSettings';
+import { useEditorKeyboardShortcuts } from '../hooks/useEditorKeyboardShortcuts';
+import type { CodeEditorFile } from '../types/types';
+import { createMinimapExtension, createScrollToFirstChunkExtension, getLanguageExtensions } from '../utils/editorExtensions';
+import { getEditorStyles } from '../utils/editorStyles';
+import { createEditorToolbarPanelExtension } from '../utils/editorToolbarPanel';
+import CodeEditorFooter from './subcomponents/CodeEditorFooter';
+import CodeEditorHeader from './subcomponents/CodeEditorHeader';
+import CodeEditorLoadingState from './subcomponents/CodeEditorLoadingState';
+import CodeEditorSurface from './subcomponents/CodeEditorSurface';
+
+type CodeEditorProps = {
+  file: CodeEditorFile;
+  onClose: () => void;
+  projectPath?: string;
+  isSidebar?: boolean;
+  isExpanded?: boolean;
+  onToggleExpand?: (() => void) | null;
+  onPopOut?: (() => void) | null;
+};
+
+export default function CodeEditor({
+  file,
+  onClose,
+  projectPath,
+  isSidebar = false,
+  isExpanded = false,
+  onToggleExpand = null,
+  onPopOut = null,
+}: CodeEditorProps) {
+  const { t } = useTranslation('codeEditor');
+  const [isFullscreen, setIsFullscreen] = useState(false);
+  const [showDiff, setShowDiff] = useState(Boolean(file.diffInfo));
+  const [markdownPreview, setMarkdownPreview] = useState(false);
+
+  const {
+    isDarkMode,
+    wordWrap,
+    minimapEnabled,
+    showLineNumbers,
+    fontSize,
+  } = useCodeEditorSettings();
+
+  const {
+    content,
+    setContent,
+    loading,
+    saving,
+    saveSuccess,
+    saveError,
+    handleSave,
+    handleDownload,
+  } = useCodeEditorDocument({
+    file,
+    projectPath,
+  });
+
+  const isMarkdownFile = useMemo(() => {
+    const extension = file.name.split('.').pop()?.toLowerCase();
+    return extension === 'md' || extension === 'markdown';
+  }, [file.name]);
+
+  const minimapExtension = useMemo(
+    () => (
+      createMinimapExtension({
+        file,
+        showDiff,
+        minimapEnabled,
+        isDarkMode,
+      })
+    ),
+    [file, isDarkMode, minimapEnabled, showDiff],
+  );
+
+  const scrollToFirstChunkExtension = useMemo(
+    () => createScrollToFirstChunkExtension({ file, showDiff }),
+    [file, showDiff],
+  );
+
+  const toolbarPanelExtension = useMemo(
+    () => (
+      createEditorToolbarPanelExtension({
+        file,
+        showDiff,
+        isSidebar,
+        isExpanded,
+        onToggleDiff: () => setShowDiff((previous) => !previous),
+        onPopOut,
+        onToggleExpand,
+        labels: {
+          changes: t('toolbar.changes'),
+          previousChange: t('toolbar.previousChange'),
+          nextChange: t('toolbar.nextChange'),
+          hideDiff: t('toolbar.hideDiff'),
+          showDiff: t('toolbar.showDiff'),
+          collapse: t('toolbar.collapse'),
+          expand: t('toolbar.expand'),
+        },
+      })
+    ),
+    [file, isExpanded, isSidebar, onPopOut, onToggleExpand, showDiff, t],
+  );
+
+  const extensions = useMemo(() => {
+    const allExtensions: Extension[] = [
+      ...getLanguageExtensions(file.name),
+      ...toolbarPanelExtension,
+    ];
+
+    if (file.diffInfo && showDiff && file.diffInfo.old_string !== undefined) {
+      allExtensions.push(
+        unifiedMergeView({
+          original: file.diffInfo.old_string,
+          mergeControls: false,
+          highlightChanges: true,
+          syntaxHighlightDeletions: false,
+          gutter: true,
+        }),
+      );
+      allExtensions.push(...minimapExtension);
+      allExtensions.push(...scrollToFirstChunkExtension);
+    }
+
+    if (wordWrap) {
+      allExtensions.push(EditorView.lineWrapping);
+    }
+
+    return allExtensions;
+  }, [
+    file.diffInfo,
+    file.name,
+    minimapExtension,
+    scrollToFirstChunkExtension,
+    showDiff,
+    toolbarPanelExtension,
+    wordWrap,
+  ]);
+
+  useEditorKeyboardShortcuts({
+    onSave: handleSave,
+    onClose,
+    dependency: content,
+  });
+
+  if (loading) {
+    return (
+      <CodeEditorLoadingState
+        isDarkMode={isDarkMode}
+        isSidebar={isSidebar}
+        loadingText={t('loading', { fileName: file.name })}
+      />
+    );
+  }
+
+  const outerContainerClassName = isSidebar
+    ? 'w-full h-full flex flex-col'
+    : `fixed inset-0 z-[9999] md:bg-black/50 md:flex md:items-center md:justify-center md:p-4 ${isFullscreen ? 'md:p-0' : ''}`;
+
+  const innerContainerClassName = isSidebar
+    ? 'bg-background flex flex-col w-full h-full'
+    : `bg-background shadow-2xl flex flex-col w-full h-full md:rounded-lg md:shadow-2xl${
+      isFullscreen ? ' md:w-full md:h-full md:rounded-none' : ' md:w-full md:max-w-6xl md:h-[80vh] md:max-h-[80vh]'
+    }`;
+
+  return (
+    <>
+      <style>{getEditorStyles(isDarkMode)}</style>
+      <div className={outerContainerClassName}>
+        <div className={innerContainerClassName}>
+          <CodeEditorHeader
+            file={file}
+            isSidebar={isSidebar}
+            isFullscreen={isFullscreen}
+            isMarkdownFile={isMarkdownFile}
+            markdownPreview={markdownPreview}
+            saving={saving}
+            saveSuccess={saveSuccess}
+            onToggleMarkdownPreview={() => setMarkdownPreview((previous) => !previous)}
+            onOpenSettings={() => window.openSettings?.('appearance')}
+            onDownload={handleDownload}
+            onSave={handleSave}
+            onToggleFullscreen={() => setIsFullscreen((previous) => !previous)}
+            onClose={onClose}
+            labels={{
+              showingChanges: t('header.showingChanges'),
+              editMarkdown: t('actions.editMarkdown'),
+              previewMarkdown: t('actions.previewMarkdown'),
+              settings: t('toolbar.settings'),
+              download: t('actions.download'),
+              save: t('actions.save'),
+              saving: t('actions.saving'),
+              saved: t('actions.saved'),
+              fullscreen: t('actions.fullscreen'),
+              exitFullscreen: t('actions.exitFullscreen'),
+              close: t('actions.close'),
+            }}
+          />
+
+          {saveError && (
+            <div className="px-3 py-1.5 text-xs text-red-700 bg-red-50 border-b border-red-200 dark:bg-red-900/20 dark:text-red-300 dark:border-red-900/40">
+              {saveError}
+            </div>
+          )}
+
+          <div className="flex-1 overflow-hidden">
+            <CodeEditorSurface
+              content={content}
+              onChange={setContent}
+              markdownPreview={markdownPreview}
+              isMarkdownFile={isMarkdownFile}
+              isDarkMode={isDarkMode}
+              fontSize={fontSize}
+              showLineNumbers={showLineNumbers}
+              extensions={extensions}
+            />
+          </div>
+
+          <CodeEditorFooter
+            content={content}
+            linesLabel={t('footer.lines')}
+            charactersLabel={t('footer.characters')}
+            shortcutsLabel={t('footer.shortcuts')}
+          />
+        </div>
+      </div>
+    </>
+  );
+}

src/components/code-editor/view/EditorSidebar.tsx

@@ -0,0 +1,85 @@
+import { useState } from 'react';
+import type { MouseEvent, MutableRefObject } from 'react';
+import type { CodeEditorFile } from '../types/types';
+import CodeEditor from './CodeEditor';
+
+type EditorSidebarProps = {
+  editingFile: CodeEditorFile | null;
+  isMobile: boolean;
+  editorExpanded: boolean;
+  editorWidth: number;
+  hasManualWidth: boolean;
+  resizeHandleRef: MutableRefObject<HTMLDivElement | null>;
+  onResizeStart: (event: MouseEvent<HTMLDivElement>) => void;
+  onCloseEditor: () => void;
+  onToggleEditorExpand: () => void;
+  projectPath?: string;
+  fillSpace?: boolean;
+};
+
+export default function EditorSidebar({
+  editingFile,
+  isMobile,
+  editorExpanded,
+  editorWidth,
+  hasManualWidth,
+  resizeHandleRef,
+  onResizeStart,
+  onCloseEditor,
+  onToggleEditorExpand,
+  projectPath,
+  fillSpace,
+}: EditorSidebarProps) {
+  const [poppedOut, setPoppedOut] = useState(false);
+
+  if (!editingFile) {
+    return null;
+  }
+
+  if (isMobile || poppedOut) {
+    return (
+      <CodeEditor
+        file={editingFile}
+        onClose={() => {
+          setPoppedOut(false);
+          onCloseEditor();
+        }}
+        projectPath={projectPath}
+        isSidebar={false}
+      />
+    );
+  }
+
+  // In files tab, fill the remaining width unless user has dragged manually.
+  const useFlexLayout = editorExpanded || (fillSpace && !hasManualWidth);
+
+  return (
+    <>
+      {!editorExpanded && (
+        <div
+          ref={resizeHandleRef}
+          onMouseDown={onResizeStart}
+          className="flex-shrink-0 w-1 bg-gray-200 dark:bg-gray-700 hover:bg-blue-500 dark:hover:bg-blue-600 cursor-col-resize transition-colors relative group"
+          title="Drag to resize"
+        >
+          <div className="absolute inset-y-0 left-1/2 -translate-x-1/2 w-1 bg-blue-500 dark:bg-blue-600 opacity-0 group-hover:opacity-100 transition-opacity" />
+        </div>
+      )}
+
+      <div
+        className={`flex-shrink-0 border-l border-gray-200 dark:border-gray-700 h-full overflow-hidden ${useFlexLayout ? 'flex-1' : ''}`}
+        style={useFlexLayout ? undefined : { width: `${editorWidth}px` }}
+      >
+        <CodeEditor
+          file={editingFile}
+          onClose={onCloseEditor}
+          projectPath={projectPath}
+          isSidebar
+          isExpanded={editorExpanded}
+          onToggleExpand={onToggleEditorExpand}
+          onPopOut={() => setPoppedOut(true)}
+        />
+      </div>
+    </>
+  );
+}

src/components/code-editor/view/subcomponents/CodeEditorFooter.tsx

@@ -0,0 +1,28 @@
+type CodeEditorFooterProps = {
+  content: string;
+  linesLabel: string;
+  charactersLabel: string;
+  shortcutsLabel: string;
+};
+
+export default function CodeEditorFooter({
+  content,
+  linesLabel,
+  charactersLabel,
+  shortcutsLabel,
+}: CodeEditorFooterProps) {
+  return (
+    <div className="flex items-center justify-between px-3 py-1.5 border-t border-border bg-muted flex-shrink-0">
+      <div className="flex items-center gap-3 text-xs text-gray-600 dark:text-gray-400">
+        <span>
+          {linesLabel} {content.split('\n').length}
+        </span>
+        <span>
+          {charactersLabel} {content.length}
+        </span>
+      </div>
+
+      <div className="text-xs text-gray-500 dark:text-gray-400">{shortcutsLabel}</div>
+    </div>
+  );
+}

src/components/code-editor/view/subcomponents/CodeEditorHeader.tsx

@@ -0,0 +1,143 @@
+import { Code2, Download, Eye, Maximize2, Minimize2, Save, Settings as SettingsIcon, X } from 'lucide-react';
+import type { CodeEditorFile } from '../../types/types';
+
+type CodeEditorHeaderProps = {
+  file: CodeEditorFile;
+  isSidebar: boolean;
+  isFullscreen: boolean;
+  isMarkdownFile: boolean;
+  markdownPreview: boolean;
+  saving: boolean;
+  saveSuccess: boolean;
+  onToggleMarkdownPreview: () => void;
+  onOpenSettings: () => void;
+  onDownload: () => void;
+  onSave: () => void;
+  onToggleFullscreen: () => void;
+  onClose: () => void;
+  labels: {
+    showingChanges: string;
+    editMarkdown: string;
+    previewMarkdown: string;
+    settings: string;
+    download: string;
+    save: string;
+    saving: string;
+    saved: string;
+    fullscreen: string;
+    exitFullscreen: string;
+    close: string;
+  };
+};
+
+export default function CodeEditorHeader({
+  file,
+  isSidebar,
+  isFullscreen,
+  isMarkdownFile,
+  markdownPreview,
+  saving,
+  saveSuccess,
+  onToggleMarkdownPreview,
+  onOpenSettings,
+  onDownload,
+  onSave,
+  onToggleFullscreen,
+  onClose,
+  labels,
+}: CodeEditorHeaderProps) {
+  const saveTitle = saveSuccess ? labels.saved : saving ? labels.saving : labels.save;
+
+  return (
+    <div className="flex items-center justify-between px-3 py-1.5 border-b border-border flex-shrink-0 min-w-0">
+      <div className="flex items-center gap-2 min-w-0 flex-1">
+        <div className="min-w-0 flex-1">
+          <div className="flex items-center gap-2 min-w-0">
+            <h3 className="text-sm font-medium text-gray-900 dark:text-white truncate">{file.name}</h3>
+            {file.diffInfo && (
+              <span className="text-[10px] bg-blue-100 dark:bg-blue-900 text-blue-600 dark:text-blue-300 px-1.5 py-0.5 rounded whitespace-nowrap">
+                {labels.showingChanges}
+              </span>
+            )}
+          </div>
+          <p className="text-xs text-gray-500 dark:text-gray-400 truncate">{file.path}</p>
+        </div>
+      </div>
+
+      <div className="flex items-center gap-0.5 md:gap-1 flex-shrink-0">
+        {isMarkdownFile && (
+          <button
+            type="button"
+            onClick={onToggleMarkdownPreview}
+            className={`p-1.5 rounded-md min-w-[36px] min-h-[36px] md:min-w-0 md:min-h-0 flex items-center justify-center transition-colors ${
+              markdownPreview
+                ? 'text-blue-600 dark:text-blue-400 bg-blue-50 dark:bg-blue-900/30'
+                : 'text-gray-600 dark:text-gray-400 hover:text-gray-900 dark:hover:text-white hover:bg-gray-100 dark:hover:bg-gray-800'
+            }`}
+            title={markdownPreview ? labels.editMarkdown : labels.previewMarkdown}
+          >
+            {markdownPreview ? <Code2 className="w-4 h-4" /> : <Eye className="w-4 h-4" />}
+          </button>
+        )}
+
+        <button
+          type="button"
+          onClick={onOpenSettings}
+          className="p-1.5 text-gray-600 dark:text-gray-400 hover:text-gray-900 dark:hover:text-white rounded-md hover:bg-gray-100 dark:hover:bg-gray-800 min-w-[36px] min-h-[36px] md:min-w-0 md:min-h-0 flex items-center justify-center"
+          title={labels.settings}
+        >
+          <SettingsIcon className="w-4 h-4" />
+        </button>
+
+        <button
+          type="button"
+          onClick={onDownload}
+          className="p-1.5 text-gray-600 dark:text-gray-400 hover:text-gray-900 dark:hover:text-white rounded-md hover:bg-gray-100 dark:hover:bg-gray-800 min-w-[36px] min-h-[36px] md:min-w-0 md:min-h-0 flex items-center justify-center"
+          title={labels.download}
+        >
+          <Download className="w-4 h-4" />
+        </button>
+
+        <button
+          type="button"
+          onClick={onSave}
+          disabled={saving}
+          className={`p-1.5 rounded-md disabled:opacity-50 flex items-center justify-center transition-colors min-w-[36px] min-h-[36px] md:min-w-0 md:min-h-0 ${
+            saveSuccess
+              ? 'text-green-600 dark:text-green-400 bg-green-50 dark:bg-green-900/30'
+              : 'text-gray-600 dark:text-gray-400 hover:text-gray-900 dark:hover:text-white hover:bg-gray-100 dark:hover:bg-gray-800'
+          }`}
+          title={saveTitle}
+        >
+          {saveSuccess ? (
+            <svg className="w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+              <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M5 13l4 4L19 7" />
+            </svg>
+          ) : (
+            <Save className="w-4 h-4" />
+          )}
+        </button>
+
+        {!isSidebar && (
+          <button
+            type="button"
+            onClick={onToggleFullscreen}
+            className="hidden md:flex p-1.5 text-gray-600 dark:text-gray-400 hover:text-gray-900 dark:hover:text-white rounded-md hover:bg-gray-100 dark:hover:bg-gray-800 items-center justify-center"
+            title={isFullscreen ? labels.exitFullscreen : labels.fullscreen}
+          >
+            {isFullscreen ? <Minimize2 className="w-4 h-4" /> : <Maximize2 className="w-4 h-4" />}
+          </button>
+        )}
+
+        <button
+          type="button"
+          onClick={onClose}
+          className="p-1.5 text-gray-600 dark:text-gray-400 hover:text-gray-900 dark:hover:text-white rounded-md hover:bg-gray-100 dark:hover:bg-gray-800 min-w-[36px] min-h-[36px] md:min-w-0 md:min-h-0 flex items-center justify-center"
+          title={labels.close}
+        >
+          <X className="w-4 h-4" />
+        </button>
+      </div>
+    </div>
+  );
+}

src/components/code-editor/view/subcomponents/CodeEditorLoadingState.tsx

@@ -0,0 +1,36 @@
+import { getEditorLoadingStyles } from '../../utils/editorStyles';
+
+type CodeEditorLoadingStateProps = {
+  isDarkMode: boolean;
+  isSidebar: boolean;
+  loadingText: string;
+};
+
+export default function CodeEditorLoadingState({
+  isDarkMode,
+  isSidebar,
+  loadingText,
+}: CodeEditorLoadingStateProps) {
+  return (
+    <>
+      <style>{getEditorLoadingStyles(isDarkMode)}</style>
+      {isSidebar ? (
+        <div className="w-full h-full flex items-center justify-center bg-background">
+          <div className="flex items-center gap-3">
+            <div className="animate-spin rounded-full h-6 w-6 border-b-2 border-blue-600" />
+            <span className="text-gray-900 dark:text-white">{loadingText}</span>
+          </div>
+        </div>
+      ) : (
+        <div className="fixed inset-0 z-[9999] md:bg-black/50 md:flex md:items-center md:justify-center">
+          <div className="code-editor-loading w-full h-full md:rounded-lg md:w-auto md:h-auto p-8 flex items-center justify-center">
+            <div className="flex items-center gap-3">
+              <div className="animate-spin rounded-full h-6 w-6 border-b-2 border-blue-600" />
+              <span className="text-gray-900 dark:text-white">{loadingText}</span>
+            </div>
+          </div>
+        </div>
+      )}
+    </>
+  );
+}

src/components/code-editor/view/subcomponents/CodeEditorSurface.tsx

@@ -0,0 +1,62 @@
+import CodeMirror from '@uiw/react-codemirror';
+import { oneDark } from '@codemirror/theme-one-dark';
+import type { Extension } from '@codemirror/state';
+import MarkdownPreview from './markdown/MarkdownPreview';
+
+type CodeEditorSurfaceProps = {
+  content: string;
+  onChange: (value: string) => void;
+  markdownPreview: boolean;
+  isMarkdownFile: boolean;
+  isDarkMode: boolean;
+  fontSize: number;
+  showLineNumbers: boolean;
+  extensions: Extension[];
+};
+
+export default function CodeEditorSurface({
+  content,
+  onChange,
+  markdownPreview,
+  isMarkdownFile,
+  isDarkMode,
+  fontSize,
+  showLineNumbers,
+  extensions,
+}: CodeEditorSurfaceProps) {
+  if (markdownPreview && isMarkdownFile) {
+    return (
+      <div className="h-full overflow-y-auto bg-white dark:bg-gray-900">
+        <div className="max-w-4xl mx-auto px-8 py-6 prose prose-sm dark:prose-invert prose-headings:font-semibold prose-a:text-blue-600 dark:prose-a:text-blue-400 prose-code:text-sm prose-pre:bg-gray-900 prose-img:rounded-lg max-w-none">
+          <MarkdownPreview content={content} />
+        </div>
+      </div>
+    );
+  }
+
+  return (
+    <CodeMirror
+      value={content}
+      onChange={onChange}
+      extensions={extensions}
+      theme={isDarkMode ? oneDark : undefined}
+      height="100%"
+      style={{
+        fontSize: `${fontSize}px`,
+        height: '100%',
+      }}
+      basicSetup={{
+        lineNumbers: showLineNumbers,
+        foldGutter: true,
+        dropCursor: false,
+        allowMultipleSelections: false,
+        indentOnInput: true,
+        bracketMatching: true,
+        closeBrackets: true,
+        autocompletion: true,
+        highlightSelectionMatches: true,
+        searchKeymap: true,
+      }}
+    />
+  );
+}

src/components/code-editor/view/subcomponents/markdown/MarkdownCodeBlock.tsx

@@ -0,0 +1,72 @@
+import { useState } from 'react';
+import type { ComponentProps } from 'react';
+import { Prism as SyntaxHighlighter } from 'react-syntax-highlighter';
+import { oneDark as prismOneDark } from 'react-syntax-highlighter/dist/esm/styles/prism';
+import { copyTextToClipboard } from '../../../../../utils/clipboard';
+
+type MarkdownCodeBlockProps = {
+  inline?: boolean;
+  node?: unknown;
+} & ComponentProps<'code'>;
+
+export default function MarkdownCodeBlock({
+  inline,
+  className,
+  children,
+  node: _node,
+  ...props
+}: MarkdownCodeBlockProps) {
+  const [copied, setCopied] = useState(false);
+  const rawContent = Array.isArray(children) ? children.join('') : String(children ?? '');
+  const looksMultiline = /[\r\n]/.test(rawContent);
+  const shouldRenderInline = inline || !looksMultiline;
+
+  if (shouldRenderInline) {
+    return (
+      <code
+        className={`font-mono text-[0.9em] px-1.5 py-0.5 rounded-md bg-gray-100 text-gray-900 border border-gray-200 dark:bg-gray-800/60 dark:text-gray-100 dark:border-gray-700 whitespace-pre-wrap break-words ${className || ''}`}
+        {...props}
+      >
+        {children}
+      </code>
+    );
+  }
+
+  const languageMatch = /language-(\w+)/.exec(className || '');
+  const language = languageMatch ? languageMatch[1] : 'text';
+
+  return (
+    <div className="relative group my-2">
+      {language !== 'text' && (
+        <div className="absolute top-2 left-3 z-10 text-xs text-gray-400 font-medium uppercase">{language}</div>
+      )}
+
+      <button
+        type="button"
+        onClick={() =>
+          copyTextToClipboard(rawContent).then((success) => {
+            if (success) {
+              setCopied(true);
+              setTimeout(() => setCopied(false), 2000);
+            }
+          })}
+        className="absolute top-2 right-2 z-10 opacity-0 group-hover:opacity-100 transition-opacity text-xs px-2 py-1 rounded-md bg-gray-700/80 hover:bg-gray-700 text-white border border-gray-600"
+      >
+        {copied ? 'Copied!' : 'Copy'}
+      </button>
+
+      <SyntaxHighlighter
+        language={language}
+        style={prismOneDark}
+        customStyle={{
+          margin: 0,
+          borderRadius: '0.5rem',
+          fontSize: '0.875rem',
+          padding: language !== 'text' ? '2rem 1rem 1rem 1rem' : '1rem',
+        }}
+      >
+        {rawContent}
+      </SyntaxHighlighter>
+    </div>
+  );
+}

src/components/code-editor/view/subcomponents/markdown/MarkdownPreview.tsx

@@ -0,0 +1,52 @@
+import { useMemo } from 'react';
+import type { Components } from 'react-markdown';
+import ReactMarkdown from 'react-markdown';
+import rehypeKatex from 'rehype-katex';
+import remarkGfm from 'remark-gfm';
+import remarkMath from 'remark-math';
+import MarkdownCodeBlock from './MarkdownCodeBlock';
+
+type MarkdownPreviewProps = {
+  content: string;
+};
+
+const markdownPreviewComponents: Components = {
+  code: MarkdownCodeBlock,
+  blockquote: ({ children }) => (
+    <blockquote className="border-l-4 border-gray-300 dark:border-gray-600 pl-4 italic text-gray-600 dark:text-gray-400 my-2">
+      {children}
+    </blockquote>
+  ),
+  a: ({ href, children }) => (
+    <a href={href} className="text-blue-600 dark:text-blue-400 hover:underline" target="_blank" rel="noopener noreferrer">
+      {children}
+    </a>
+  ),
+  table: ({ children }) => (
+    <div className="overflow-x-auto my-2">
+      <table className="min-w-full border-collapse border border-gray-200 dark:border-gray-700">{children}</table>
+    </div>
+  ),
+  thead: ({ children }) => <thead className="bg-gray-50 dark:bg-gray-800">{children}</thead>,
+  th: ({ children }) => (
+    <th className="px-3 py-2 text-left text-sm font-semibold border border-gray-200 dark:border-gray-700">{children}</th>
+  ),
+  td: ({ children }) => (
+    <td className="px-3 py-2 align-top text-sm border border-gray-200 dark:border-gray-700">{children}</td>
+  ),
+};
+
+export default function MarkdownPreview({ content }: MarkdownPreviewProps) {
+  const remarkPlugins = useMemo(() => [remarkGfm, remarkMath], []);
+  const rehypePlugins = useMemo(() => [rehypeKatex], []);
+
+  return (
+    <ReactMarkdown
+      remarkPlugins={remarkPlugins}
+      rehypePlugins={rehypePlugins}
+      components={markdownPreviewComponents}
+    >
+      {content}
+    </ReactMarkdown>
+  );
+}