fix(frontend): replace require() with ES imports for ESM compatibility

apps/frontend/src/main/claude-profile-manager.ts

@@ -14,6 +14,7 @@
 import { app } from 'electron';
 import { join } from 'path';
 import { mkdir } from 'fs/promises';
+import os from 'os';
 import type {
   ClaudeProfile,
   ClaudeProfileSettings,
@@ -381,7 +382,7 @@ export class ClaudeProfileManager {
     if (profile?.configDir && !profile.isDefault) {
       // Expand ~ to home directory for the environment variable
       const expandedConfigDir = profile.configDir.startsWith('~')
-        ? profile.configDir.replace(/^~/, require('os').homedir())
+        ? profile.configDir.replace(/^~/, os.homedir())
         : profile.configDir;
       env.CLAUDE_CONFIG_DIR = expandedConfigDir;
       console.warn('[ClaudeProfileManager] Using configDir for profile:', profile.name, expandedConfigDir);

apps/frontend/src/main/ipc-handlers/context/utils.ts

@@ -1,5 +1,6 @@
 import { app } from 'electron';
 import path from 'path';
+import os from 'os';
 import { existsSync, readFileSync } from 'fs';
 
 export interface EnvironmentVars {
@@ -215,7 +216,7 @@ export interface GraphitiDatabaseDetails {
 export function getGraphitiDatabaseDetails(projectEnvVars: EnvironmentVars): GraphitiDatabaseDetails {
   const dbPath = projectEnvVars['GRAPHITI_DB_PATH'] ||
                  process.env.GRAPHITI_DB_PATH ||
-                 require('path').join(require('os').homedir(), '.auto-claude', 'memories');
+                 path.join(os.homedir(), '.auto-claude', 'memories');
 
   const database = projectEnvVars['GRAPHITI_DATABASE'] ||
                    process.env.GRAPHITI_DATABASE ||

apps/frontend/src/main/ipc-handlers/github/utils/subprocess-runner.ts

@@ -11,6 +11,7 @@ import { promisify } from 'util';
 import path from 'path';
 import { fileURLToPath } from 'url';
 import fs from 'fs';
+import { app } from 'electron';
 
 // ESM-compatible __dirname
 const __filename = fileURLToPath(import.meta.url);
@@ -335,14 +336,6 @@ export function getRunnerPath(backendPath: string): string {
  * 3. Current working directory
  */
 export function getBackendPath(project: Project): string | null {
-  // Import app module for production path detection
-  let app: any;
-  try {
-    app = require('electron').app;
-  } catch {
-    // Electron not available in tests
-  }
-
   // Check if this is a development repo (has apps/backend structure)
   const appsBackendPath = path.join(project.path, 'apps', 'backend');
   if (fs.existsSync(path.join(appsBackendPath, 'runners', 'github', 'runner.py'))) {

apps/frontend/src/main/ipc-handlers/task/worktree-handlers.ts

@@ -3,7 +3,7 @@ import { IPC_CHANNELS, AUTO_BUILD_PATHS, DEFAULT_APP_SETTINGS, DEFAULT_FEATURE_M
 import type { IPCResult, WorktreeStatus, WorktreeDiff, WorktreeDiffFile, WorktreeMergeResult, WorktreeDiscardResult, WorktreeListResult, WorktreeListItem, WorktreeCreatePROptions, WorktreeCreatePRResult, SupportedIDE, SupportedTerminal, AppSettings } from '../../../shared/types';
 import path from 'path';
 import { minimatch } from 'minimatch';
-import { existsSync, readdirSync, statSync, readFileSync } from 'fs';
+import { existsSync, readdirSync, statSync, readFileSync, promises as fsPromises } from 'fs';
 import { execSync, execFileSync, spawn, spawnSync, exec, execFile } from 'child_process';
 import { projectStore } from '../../project-store';
 import { getConfiguredPythonPath, PythonEnvManager, pythonEnvManager as pythonEnvManagerSingleton } from '../../python-env-manager';
@@ -2196,7 +2196,6 @@ export function registerWorktreeHandlers(
                 const commitMsgPath = path.join(specDir, 'suggested_commit_message.txt');
                 try {
                   if (existsSync(commitMsgPath)) {
-                    const { promises: fsPromises } = require('fs');
                     suggestedCommitMessage = (await fsPromises.readFile(commitMsgPath, 'utf-8')).trim();
                     debug('Read suggested commit message:', suggestedCommitMessage?.substring(0, 100));
                   }
@@ -2219,8 +2218,6 @@ export function registerWorktreeHandlers(
                 planPaths.push({ path: path.join(worktreeSpecDir, AUTO_BUILD_PATHS.IMPLEMENTATION_PLAN), isMain: false });
               }
 
-              const { promises: fsPromises } = require('fs');
-
               // Update plan file with retry logic for transient failures
               // Uses EAFP pattern (try/catch) instead of LBYL (existsSync check) to avoid TOCTOU race conditions
               const updatePlanWithRetry = async (planPath: string, isMain: boolean): Promise<boolean> => {
@@ -2838,7 +2835,6 @@ export function registerWorktreeHandlers(
         const planPath = path.join(specDir, AUTO_BUILD_PATHS.IMPLEMENTATION_PLAN);
 
         // Use EAFP pattern (try/catch) instead of LBYL (existsSync check) to avoid TOCTOU race conditions
-        const { promises: fsPromises } = require('fs');
         const isFileNotFound = (err: unknown): boolean =>
           !!(err && typeof err === 'object' && 'code' in err && err.code === 'ENOENT');
 

apps/frontend/src/main/log-service.ts

@@ -1,5 +1,5 @@
 import path from 'path';
-import { existsSync, mkdirSync, appendFileSync, readdirSync, readFileSync, writeFileSync, statSync } from 'fs';
+import { existsSync, mkdirSync, appendFileSync, readdirSync, readFileSync, writeFileSync, statSync, unlinkSync } from 'fs';
 
 export interface LogSession {
   sessionId: string;
@@ -293,7 +293,7 @@ export class LogService {
       for (const file of toDelete) {
         const filePath = path.join(logsDir, file);
         try {
-          require('fs').unlinkSync(filePath);
+          unlinkSync(filePath);
           console.warn(`[LogService] Deleted old log session: ${file}`);
         } catch (_e) {
           // Ignore deletion errors