fix: address code review feedback from PR #423

Addresses feedback from gemini-code-assist and coderabbitai reviewers:

## Duplicate Code (High Priority)
- Extract `getEffectiveDefaultEditor` logic into shared `useEffectiveDefaultEditor` hook
- Both account-section.tsx and worktree-actions-dropdown.tsx now use the shared hook

## Performance (Medium Priority)
- Refactor `detectAllEditors` to use `Promise.all` for parallel editor detection
- Replace sequential `await tryAddEditor()` calls with parallel `findEditor()` checks

## Code Quality (Medium Priority)
- Remove verbose IIFE pattern for editor icon rendering
- Pre-compute icon components before JSX return statement

## Bug Fixes
- Use `os.homedir()` instead of `~` fallback which doesn't expand in shell
- Normalize Select value to 'auto' when saved editor command not found in editors
- Add defensive check for empty editors array in useEffectiveDefaultEditor
- Improve mock openInEditor to correctly map all editor commands to display names

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

apps/server/src/routes/worktree/routes/open-in-editor.ts

@@ -6,6 +6,7 @@
 import type { Request, Response } from 'express';
 import { exec } from 'child_process';
 import { promisify } from 'util';
+import { homedir } from 'os';
 import { getErrorMessage, logError } from '../common.js';
 
 const execAsync = promisify(exec);
@@ -48,7 +49,7 @@ async function findMacApp(appName: string): Promise<string | null> {
 
   // Check ~/Applications (used by JetBrains Toolbox and others)
   try {
-    const homeDir = process.env.HOME || '~';
+    const homeDir = homedir();
     await execAsync(`test -d "${homeDir}/Applications/${appName}.app"`);
     return `${homeDir}/Applications/${appName}.app`;
   } catch {
@@ -57,18 +58,17 @@ async function findMacApp(appName: string): Promise<string | null> {
 }
 
 /**
- * Try to add an editor - checks CLI first, then macOS app bundle
+ * Try to find an editor - checks CLI first, then macOS app bundle
+ * Returns EditorInfo if found, null otherwise
  */
-async function tryAddEditor(
-  editors: EditorInfo[],
+async function findEditor(
   name: string,
   cliCommand: string,
   macAppName: string
-): Promise<void> {
+): Promise<EditorInfo | null> {
   // Try CLI command first
   if (await commandExists(cliCommand)) {
-    editors.push({ name, command: cliCommand });
-    return;
+    return { name, command: cliCommand };
   }
 
   // Try macOS app bundle (checks /Applications and ~/Applications)
@@ -76,9 +76,11 @@ async function tryAddEditor(
     const appPath = await findMacApp(macAppName);
     if (appPath) {
       // Use 'open -a' with full path for apps not in /Applications
-      editors.push({ name, command: `open -a "${appPath}"` });
+      return { name, command: `open -a "${appPath}"` };
     }
   }
+
+  return null;
 }
 
 async function detectAllEditors(): Promise<EditorInfo[]> {
@@ -87,26 +89,29 @@ async function detectAllEditors(): Promise<EditorInfo[]> {
     return cachedEditors;
   }
 
-  const editors: EditorInfo[] = [];
   const isMac = process.platform === 'darwin';
 
-  // Try editors (CLI command, then macOS app bundle)
-  await tryAddEditor(editors, 'Cursor', 'cursor', 'Cursor');
-  await tryAddEditor(editors, 'VS Code', 'code', 'Visual Studio Code');
-  await tryAddEditor(editors, 'Zed', 'zed', 'Zed');
-  await tryAddEditor(editors, 'Sublime Text', 'subl', 'Sublime Text');
-  await tryAddEditor(editors, 'Windsurf', 'windsurf', 'Windsurf');
-  await tryAddEditor(editors, 'Trae', 'trae', 'Trae');
-  await tryAddEditor(editors, 'Rider', 'rider', 'Rider');
-  await tryAddEditor(editors, 'WebStorm', 'webstorm', 'WebStorm');
+  // Check all editors in parallel for better performance
+  const editorChecks = [
+    findEditor('Cursor', 'cursor', 'Cursor'),
+    findEditor('VS Code', 'code', 'Visual Studio Code'),
+    findEditor('Zed', 'zed', 'Zed'),
+    findEditor('Sublime Text', 'subl', 'Sublime Text'),
+    findEditor('Windsurf', 'windsurf', 'Windsurf'),
+    findEditor('Trae', 'trae', 'Trae'),
+    findEditor('Rider', 'rider', 'Rider'),
+    findEditor('WebStorm', 'webstorm', 'WebStorm'),
+    // Xcode (macOS only) - will return null on other platforms
+    isMac ? findEditor('Xcode', 'xed', 'Xcode') : Promise.resolve(null),
+    findEditor('Android Studio', 'studio', 'Android Studio'),
+    findEditor('Antigravity', 'agy', 'Antigravity'),
+  ];
 
-  // Xcode (macOS only)
-  if (isMac) {
-    await tryAddEditor(editors, 'Xcode', 'xed', 'Xcode');
-  }
+  // Wait for all checks to complete in parallel
+  const results = await Promise.all(editorChecks);
 
-  await tryAddEditor(editors, 'Android Studio', 'studio', 'Android Studio');
-  await tryAddEditor(editors, 'Antigravity', 'agy', 'Antigravity');
+  // Filter out null results (editors not found)
+  const editors = results.filter((e): e is EditorInfo => e !== null);
 
   // Always add file manager as fallback
   const platform = process.platform;

apps/ui/src/components/views/board-view/worktree-panel/components/worktree-actions-dropdown.tsx

@@ -28,9 +28,8 @@ import {
 import { cn } from '@/lib/utils';
 import type { WorktreeInfo, DevServerInfo, PRInfo, GitRepoStatus } from '../types';
 import { TooltipWrapper } from './tooltip-wrapper';
-import { useAvailableEditors } from '../hooks/use-available-editors';
+import { useAvailableEditors, useEffectiveDefaultEditor } from '../hooks/use-available-editors';
 import { getEditorIcon } from '@/components/icons/editor-icons';
-import { useAppStore } from '@/store/app-store';
 
 interface WorktreeActionsDropdownProps {
   worktree: WorktreeInfo;
@@ -84,30 +83,19 @@ export function WorktreeActionsDropdown({
   onOpenDevServerUrl,
 }: WorktreeActionsDropdownProps) {
   // Get available editors for the "Open In" submenu
-  const { editors, hasMultipleEditors } = useAvailableEditors();
+  const { editors } = useAvailableEditors();
 
-  // Get the user's preferred default editor from settings
-  const defaultEditorCommand = useAppStore((s) => s.defaultEditorCommand);
-
-  // Calculate effective default editor based on user setting or auto-detect (Cursor > VS Code > first)
-  const getEffectiveDefaultEditor = () => {
-    if (defaultEditorCommand) {
-      const found = editors.find((e) => e.command === defaultEditorCommand);
-      if (found) return found;
-    }
-    // Auto-detect: prefer Cursor, then VS Code, then first available
-    const cursor = editors.find((e) => e.command === 'cursor');
-    if (cursor) return cursor;
-    const vscode = editors.find((e) => e.command === 'code');
-    if (vscode) return vscode;
-    return editors[0];
-  };
-
-  const effectiveDefaultEditor = getEffectiveDefaultEditor();
+  // Use shared hook for effective default editor
+  const effectiveDefaultEditor = useEffectiveDefaultEditor(editors);
 
   // Get other editors (excluding the default) for the submenu
   const otherEditors = editors.filter((e) => e.command !== effectiveDefaultEditor?.command);
 
+  // Get icon component for the effective editor (avoid IIFE in JSX)
+  const DefaultEditorIcon = effectiveDefaultEditor
+    ? getEditorIcon(effectiveDefaultEditor.command)
+    : null;
+
   // Check if there's a PR associated with this worktree from stored metadata
   const hasPR = !!worktree.pr;
 
@@ -240,10 +228,7 @@ export function WorktreeActionsDropdown({
                 onClick={() => onOpenInEditor(worktree, effectiveDefaultEditor.command)}
                 className="text-xs flex-1 pr-0 rounded-r-none"
               >
-                {(() => {
-                  const EditorIcon = getEditorIcon(effectiveDefaultEditor.command);
-                  return <EditorIcon className="w-3.5 h-3.5 mr-2" />;
-                })()}
+                {DefaultEditorIcon && <DefaultEditorIcon className="w-3.5 h-3.5 mr-2" />}
                 Open in {effectiveDefaultEditor.name}
               </DropdownMenuItem>
               {/* Chevron trigger for submenu with other editors and Copy Path */}

apps/ui/src/components/views/board-view/worktree-panel/hooks/use-available-editors.ts

@@ -1,6 +1,7 @@
-import { useState, useEffect, useCallback } from 'react';
+import { useState, useEffect, useCallback, useMemo } from 'react';
 import { createLogger } from '@automaker/utils/logger';
 import { getElectronAPI } from '@/lib/electron';
+import { useAppStore } from '@/store/app-store';
 
 const logger = createLogger('AvailableEditors');
 
@@ -44,3 +45,30 @@ export function useAvailableEditors() {
     defaultEditor: editors[0] ?? null,
   };
 }
+
+/**
+ * Hook to get the effective default editor based on user settings
+ * Falls back to: Cursor > VS Code > first available editor
+ */
+export function useEffectiveDefaultEditor(editors: EditorInfo[]): EditorInfo | null {
+  const defaultEditorCommand = useAppStore((s) => s.defaultEditorCommand);
+
+  return useMemo(() => {
+    if (editors.length === 0) return null;
+
+    // If user has a saved preference and it exists in available editors, use it
+    if (defaultEditorCommand) {
+      const found = editors.find((e) => e.command === defaultEditorCommand);
+      if (found) return found;
+    }
+
+    // Auto-detect: prefer Cursor, then VS Code, then first available
+    const cursor = editors.find((e) => e.command === 'cursor');
+    if (cursor) return cursor;
+
+    const vscode = editors.find((e) => e.command === 'code');
+    if (vscode) return vscode;
+
+    return editors[0];
+  }, [editors, defaultEditorCommand]);
+}

apps/ui/src/components/views/settings-view/account/account-section.tsx

@@ -13,7 +13,10 @@ import { cn } from '@/lib/utils';
 import { logout } from '@/lib/http-api-client';
 import { useAuthStore } from '@/store/auth-store';
 import { useAppStore } from '@/store/app-store';
-import { useAvailableEditors } from '@/components/views/board-view/worktree-panel/hooks/use-available-editors';
+import {
+  useAvailableEditors,
+  useEffectiveDefaultEditor,
+} from '@/components/views/board-view/worktree-panel/hooks/use-available-editors';
 import { getEditorIcon } from '@/components/icons/editor-icons';
 
 export function AccountSection() {
@@ -25,20 +28,16 @@ export function AccountSection() {
   const defaultEditorCommand = useAppStore((s) => s.defaultEditorCommand);
   const setDefaultEditorCommand = useAppStore((s) => s.setDefaultEditorCommand);
 
-  // Get effective default editor (respecting auto-detect order: Cursor > VS Code > first)
-  const getEffectiveDefaultEditor = () => {
-    if (defaultEditorCommand) {
-      return editors.find((e) => e.command === defaultEditorCommand) ?? editors[0];
-    }
-    // Auto-detect: prefer Cursor, then VS Code, then first available
-    const cursor = editors.find((e) => e.command === 'cursor');
-    if (cursor) return cursor;
-    const vscode = editors.find((e) => e.command === 'code');
-    if (vscode) return vscode;
-    return editors[0];
-  };
+  // Use shared hook for effective default editor
+  const effectiveEditor = useEffectiveDefaultEditor(editors);
 
-  const effectiveEditor = getEffectiveDefaultEditor();
+  // Normalize Select value: if saved editor isn't found, show 'auto'
+  const hasSavedEditor =
+    !!defaultEditorCommand && editors.some((e) => e.command === defaultEditorCommand);
+  const selectValue = hasSavedEditor ? defaultEditorCommand : 'auto';
+
+  // Get icon component for the effective editor
+  const EffectiveEditorIcon = effectiveEditor ? getEditorIcon(effectiveEditor.command) : null;
 
   const handleLogout = async () => {
     setIsLoggingOut(true);
@@ -87,7 +86,7 @@ export function AccountSection() {
             </div>
           </div>
           <Select
-            value={defaultEditorCommand ?? 'auto'}
+            value={selectValue}
             onValueChange={(value) => setDefaultEditorCommand(value === 'auto' ? null : value)}
             disabled={isLoadingEditors || editors.length === 0}
           >
@@ -95,12 +94,9 @@ export function AccountSection() {
               <SelectValue placeholder="Select editor">
                 {effectiveEditor ? (
                   <span className="flex items-center gap-2">
-                    {(() => {
-                      const Icon = getEditorIcon(effectiveEditor.command);
-                      return <Icon className="w-4 h-4" />;
-                    })()}
+                    {EffectiveEditorIcon && <EffectiveEditorIcon className="w-4 h-4" />}
                     {effectiveEditor.name}
-                    {!defaultEditorCommand && (
+                    {selectValue === 'auto' && (
                       <span className="text-muted-foreground text-xs">(Auto)</span>
                     )}
                   </span>

apps/ui/src/lib/electron.ts

@@ -1626,7 +1626,24 @@ function createMockWorktreeAPI(): WorktreeAPI {
     },
 
     openInEditor: async (worktreePath: string, editorCommand?: string) => {
-      const editorName = editorCommand === 'cursor' ? 'Cursor' : 'VS Code';
+      // Map editor commands to display names
+      const editorNameMap: Record<string, string> = {
+        cursor: 'Cursor',
+        code: 'VS Code',
+        zed: 'Zed',
+        subl: 'Sublime Text',
+        windsurf: 'Windsurf',
+        trae: 'Trae',
+        rider: 'Rider',
+        webstorm: 'WebStorm',
+        xed: 'Xcode',
+        studio: 'Android Studio',
+        agy: 'Antigravity',
+        open: 'Finder',
+        explorer: 'Explorer',
+        'xdg-open': 'File Manager',
+      };
+      const editorName = editorCommand ? (editorNameMap[editorCommand] ?? 'Editor') : 'VS Code';
       console.log('[Mock] Opening in editor:', worktreePath, 'using:', editorName);
       return {
         success: true,