Complete Chinese comment cleanup in File Manager components

- FileManagerModern.tsx: Translate all Chinese comments to English, replace hardcoded text with i18n
- TerminalWindow.tsx: Complete translation and add i18n support
- DiffWindow.tsx: Complete translation and add i18n support
- FileManagerOperations.tsx: Complete translation
- Fix missed comment in FileManagerGrid.tsx

All File Manager components now have clean English comments and proper internationalization.
Follow Linus principles: simple, direct, no unnecessary complexity.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

src/ui/Desktop/Apps/File Manager/components/DiffWindow.tsx

@@ -2,6 +2,7 @@ import React from "react";
 import { DraggableWindow } from "./DraggableWindow";
 import { DiffViewer } from "./DiffViewer";
 import { useWindowManager } from "./WindowManager";
+import { useTranslation } from "react-i18next";
 import type { FileItem, SSHHost } from "../../../../types/index.js";
 
 interface DiffWindowProps {
@@ -23,12 +24,13 @@ export function DiffWindow({
   initialX = 150,
   initialY = 100,
 }: DiffWindowProps) {
+  const { t } = useTranslation();
   const { closeWindow, minimizeWindow, maximizeWindow, focusWindow, windows } =
     useWindowManager();
 
   const currentWindow = windows.find((w) => w.id === windowId);
 
-  // 窗口操作处理
+  // Window operation handling
   const handleClose = () => {
     closeWindow(windowId);
   };
@@ -51,7 +53,7 @@ export function DiffWindow({
 
   return (
     <DraggableWindow
-      title={`文件对比: ${file1.name} ↔ ${file2.name}`}
+      title={t("fileManager.fileComparison", { file1: file1.name, file2: file2.name })}
       initialX={initialX}
       initialY={initialY}
       initialWidth={1200}