全面优化：暗色主题、文件监听、未保存提醒、滚动同步、分屏记忆、文件大小显示、删除死代码

preload.js

@@ -7,6 +7,11 @@ contextBridge.exposeInMainWorld('electronAPI', {
   saveFile: (data) => ipcRenderer.invoke('file:save', data),
   saveFileAs: (data) => ipcRenderer.invoke('file:saveAs', data),
   getCurrentPath: () => ipcRenderer.invoke('file:getCurrentPath'),
+  getFileStats: (filePath) => ipcRenderer.invoke('file:stats', filePath),
+  reloadFile: () => ipcRenderer.invoke('file:reload'),
+
+  // Window control
+  forceClose: () => ipcRenderer.invoke('window:forceClose'),
 
   // Menu events
   onFileOpened: (callback) => ipcRenderer.on('file:opened', (event, data) => callback(data)),
@@ -14,6 +19,13 @@ contextBridge.exposeInMainWorld('electronAPI', {
   onMenuSaveAs: (callback) => ipcRenderer.on('menu:saveAs', () => callback()),
   onViewModeChange: (callback) => ipcRenderer.on('menu:viewMode', (event, mode) => callback(mode)),
 
+  // File modification detection
+  onExternalModification: (callback) => ipcRenderer.on('file:externallyModified', (event, filePath) => callback(filePath)),
+
+  // Window close confirmation
+  onConfirmClose: (callback) => ipcRenderer.on('window:confirmClose', () => callback()),
+  onClosing: (callback) => ipcRenderer.on('window:closing', () => callback()),
+
   // Remove listeners
   removeAllListeners: (channel) => ipcRenderer.removeAllListeners(channel)
 });