feat: v1.2.0 搜索替换 + 文件树侧边栏

main.js

@@ -305,6 +305,88 @@ ipcMain.handle('file:reload', async () => {
   }
 });
 
+// ===== File Tree (Sidebar) =====
+const SKIP_DIRS = new Set(['node_modules', '.git', '.svn', '.hg', 'dist', 'out', '.next', '.nuxt', '__pycache__', '.DS_Store']);
+const MARKDOWN_EXTS = new Set(['.md', '.markdown', '.txt']);
+
+async function buildDirTree(dirPath) {
+  const entries = await fs.promises.readdir(dirPath, { withFileTypes: true });
+  // Sort: directories first, then files, alphabetically
+  entries.sort((a, b) => {
+    if (a.isDirectory() && !b.isDirectory()) return -1;
+    if (!a.isDirectory() && b.isDirectory()) return 1;
+    return a.name.localeCompare(b.name);
+  });
+
+  const children = [];
+  for (const entry of entries) {
+    if (SKIP_DIRS.has(entry.name)) continue;
+    if (entry.name.startsWith('.')) continue;
+
+    const childPath = path.join(dirPath, entry.name);
+    if (entry.isDirectory()) {
+      const subChildren = await buildDirTree(childPath);
+      if (subChildren.length > 0) {
+        children.push({ name: entry.name, path: childPath, type: 'dir', children: subChildren });
+      }
+    } else {
+      const ext = path.extname(entry.name).toLowerCase();
+      if (MARKDOWN_EXTS.has(ext)) {
+        children.push({ name: entry.name, path: childPath, type: 'file' });
+      }
+    }
+  }
+  return children;
+}
+
+ipcMain.handle('dir:readTree', async (event, dirPath) => {
+  try {
+    const tree = await buildDirTree(dirPath);
+    return { success: true, tree, rootPath: dirPath };
+  } catch (err) {
+    return { success: false, error: err.message };
+  }
+});
+
+let sidebarWatcher = null;
+let sidebarWatchPath = null;
+
+function startSidebarWatching(dirPath) {
+  stopSidebarWatching();
+  if (!dirPath) return;
+  try {
+    sidebarWatchPath = dirPath;
+    sidebarWatcher = fs.watch(dirPath, { recursive: true }, (eventType, filename) => {
+      if (mainWindow && !mainWindow.isDestroyed()) {
+        mainWindow.webContents.send('sidebar:dirChanged');
+      }
+    });
+  } catch (err) { /* ignore */ }
+}
+
+function stopSidebarWatching() {
+  if (sidebarWatcher) { sidebarWatcher.close(); sidebarWatcher = null; }
+  sidebarWatchPath = null;
+}
+
+ipcMain.handle('dir:watch', (event, dirPath) => {
+  startSidebarWatching(dirPath);
+});
+
+ipcMain.handle('dir:unwatch', () => {
+  stopSidebarWatching();
+});
+
+ipcMain.handle('dir:openDialog', async () => {
+  const result = await dialog.showOpenDialog(mainWindow, {
+    properties: ['openDirectory']
+  });
+  if (!result.canceled && result.filePaths.length > 0) {
+    return result.filePaths[0];
+  }
+  return null;
+});
+
 // Tab switched - update active file tracking
 ipcMain.handle('tab:switched', (event, filePath) => {
   switchActiveFile(filePath);