Updates Monaco editor path handling for production builds

Configures the editor to load Monaco assets from a local directory in production, improving reliability and performance by avoiding CDN usage.
Adds prebuild script to copy Monaco files, and updates ignore rules to exclude copied assets from version control.

.gitignore

@@ -22,6 +22,7 @@ coverage
 /release
 /out
 *.asar
+/public/monaco
 
 # Editor directories and files
 .vscode/*

components/TextEditorModal.tsx

@@ -12,7 +12,10 @@ import type * as Monaco from 'monaco-editor';
 import React, { useCallback, useEffect, useMemo, useRef, useState } from 'react';
 
 // Configure Monaco to use local files instead of CDN
-loader.config({ paths: { vs: './node_modules/monaco-editor/min/vs' } });
+const monacoBasePath = import.meta.env.DEV
+  ? './node_modules/monaco-editor/min/vs'
+  : `${import.meta.env.BASE_URL}monaco/vs`;
+loader.config({ paths: { vs: monacoBasePath } });
 
 import { useI18n } from '../application/i18n/I18nProvider';
 import { getLanguageId, getLanguageName, getSupportedLanguages } from '../lib/sftpFileUtils';

package.json

@@ -10,6 +10,7 @@
   "scripts": {
     "dev": "npm run lint && concurrently -k \"vite\" \"npm:dev:electron\"",
     "dev:electron": "wait-on http-get://localhost:5173 && cross-env VITE_DEV_SERVER_URL=http://localhost:5173 node electron/launch.cjs",
+    "prebuild": "node scripts/copy-monaco.cjs",
     "build": "vite build",
     "preview": "vite preview",
     "start": "node electron/launch.cjs",

scripts/copy-monaco.cjs

@@ -0,0 +1,16 @@
+const fs = require('fs');
+const path = require('path');
+
+const repoRoot = path.resolve(__dirname, '..');
+const source = path.join(repoRoot, 'node_modules', 'monaco-editor', 'min', 'vs');
+const target = path.join(repoRoot, 'public', 'monaco', 'vs');
+
+if (!fs.existsSync(source)) {
+  console.error('[copy-monaco] Source not found:', source);
+  process.exit(1);
+}
+
+fs.rmSync(target, { recursive: true, force: true });
+fs.mkdirSync(path.dirname(target), { recursive: true });
+fs.cpSync(source, target, { recursive: true });
+console.log('[copy-monaco] Copied Monaco VS assets to', target);