MAESTRO: fix(cursor): use bun runtime and fix hooks directory detection

Cherry-picked source changes from PR #721. Fixes two Cursor standalone
setup bugs:

1. findCursorHooksDir() now checks for hooks.json (unified CLI mode)
   in addition to legacy common.sh/common.ps1 scripts
2. installCursorHooks() now uses bun instead of node for hook commands
   since worker-service.cjs depends on bun:sqlite
3. Added findBunPath() to detect bun executable across platforms

Build artifacts skipped (pre-existing dompurify viewer dep issue).
Source-only cherry-pick, TypeScript compilation clean for modified file.

Co-Authored-By: polux0 <aleksaprosperitylabs@gmail.com>
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/services/integrations/CursorHooksInstaller.ts

@@ -128,7 +128,7 @@ export async function updateCursorContextForProject(projectName: string, port: n
 /**
  * Find cursor-hooks directory
  * Searches in order: marketplace install, source repo
- * Checks for both bash (common.sh) and PowerShell (common.ps1) scripts
+ * Checks for hooks.json (unified CLI mode) or legacy shell scripts
  */
 export function findCursorHooksDir(): string | null {
   const possiblePaths = [
@@ -141,8 +141,10 @@ export function findCursorHooksDir(): string | null {
   ];
 
   for (const p of possiblePaths) {
-    // Check for either bash or PowerShell common script
+    // Check for hooks.json (unified CLI mode) or legacy shell scripts
-    if (existsSync(path.join(p, 'common.sh')) || existsSync(path.join(p, 'common.ps1'))) {
+    if (existsSync(path.join(p, 'hooks.json')) ||
+        existsSync(path.join(p, 'common.sh')) ||
+        existsSync(path.join(p, 'common.ps1'))) {
       return p;
     }
   }
@@ -193,6 +195,37 @@ export function findWorkerServicePath(): string | null {
   return null;
 }
 
+/**
+ * Find the Bun executable path
+ * Required because worker-service.cjs uses bun:sqlite which is Bun-specific
+ * Searches common installation locations across platforms
+ */
+export function findBunPath(): string {
+  const possiblePaths = [
+    // Standard user install location (most common)
+    path.join(homedir(), '.bun', 'bin', 'bun'),
+    // Global install locations
+    '/usr/local/bin/bun',
+    '/usr/bin/bun',
+    // Windows locations
+    ...(process.platform === 'win32' ? [
+      path.join(homedir(), '.bun', 'bin', 'bun.exe'),
+      path.join(process.env.LOCALAPPDATA || '', 'bun', 'bun.exe'),
+    ] : []),
+  ];
+
+  for (const p of possiblePaths) {
+    if (p && existsSync(p)) {
+      return p;
+    }
+  }
+
+  // Fallback to 'bun' and hope it's in PATH
+  // This allows the installation to proceed even if we can't find bun
+  // The user will get a clear error when the hook runs if bun isn't available
+  return 'bun';
+}
+
 /**
  * Get the target directory for Cursor hooks based on install target
  */
@@ -312,15 +345,21 @@ export async function installCursorHooks(_sourceDir: string, target: CursorInsta
     // Generate hooks.json with unified CLI commands
     const hooksJsonPath = path.join(targetDir, 'hooks.json');
 
+    // Find bun executable - required because worker-service.cjs uses bun:sqlite
+    const bunPath = findBunPath();
+    const escapedBunPath = bunPath.replace(/\\/g, '\\\\');
+
     // Use the absolute path to worker-service.cjs
     // Escape backslashes for JSON on Windows
     const escapedWorkerPath = workerServicePath.replace(/\\/g, '\\\\');
 
-    // Helper to create hook command using unified CLI
+    // Helper to create hook command using unified CLI with bun runtime
     const makeHookCommand = (command: string) => {
-      return `node "${escapedWorkerPath}" hook cursor ${command}`;
+      return `"${escapedBunPath}" "${escapedWorkerPath}" hook cursor ${command}`;
     };
 
+    console.log(`  Using Bun runtime: ${bunPath}`);
+
     const hooksJson: CursorHooksJson = {
       version: 1,
       hooks: {
@@ -356,7 +395,7 @@ export async function installCursorHooks(_sourceDir: string, target: CursorInsta
 Installation complete!
 
 Hooks installed to: ${targetDir}/hooks.json
-Using unified CLI: node worker-service.cjs hook cursor <command>
+Using unified CLI: bun worker-service.cjs hook cursor <command>
 
 Next steps:
   1. Start claude-mem worker: claude-mem start
@@ -532,7 +571,7 @@ export function checkCursorHooksStatus(): number {
         const firstCommand = hooksContent?.hooks?.beforeSubmitPrompt?.[0]?.command || '';
 
         if (firstCommand.includes('worker-service.cjs') && firstCommand.includes('hook cursor')) {
-          console.log(`   Mode: Unified CLI (node worker-service.cjs)`);
+          console.log(`   Mode: Unified CLI (bun worker-service.cjs)`);
         } else {
           // Detect legacy shell scripts
           const bashScripts = ['session-init.sh', 'context-inject.sh', 'save-observation.sh'];