fix: add cross-platform Node.js launcher for Windows CMD/PowerShell support

The `./start-automaker.sh` script doesn't work when invoked from Windows
CMD or PowerShell because:
1. The `./` prefix is Unix-style path notation
2. Windows shells don't execute .sh files directly

This adds a Node.js launcher (`start-automaker.mjs`) that:
- Detects the platform and finds bash (Git Bash, MSYS2, Cygwin, or WSL)
- Converts Windows paths to Unix-style for bash compatibility
- Passes all arguments through to the original bash script
- Provides helpful error messages if bash isn't found

The npm scripts now use `node start-automaker.mjs` which works on all
platforms while preserving the full functionality of the bash TUI launcher.

package.json

@@ -12,8 +12,8 @@
   "scripts": {
     "postinstall": "node -e \"const fs=require('fs');if(process.platform==='darwin'){['darwin-arm64','darwin-x64'].forEach(a=>{const p='node_modules/node-pty/prebuilds/'+a+'/spawn-helper';if(fs.existsSync(p))fs.chmodSync(p,0o755)})}\" && node scripts/fix-lockfile-urls.mjs",
     "fix:lockfile": "node scripts/fix-lockfile-urls.mjs",
-    "dev": "./start-automaker.sh",
-    "start": "./start-automaker.sh --production",
+    "dev": "node start-automaker.mjs",
+    "start": "node start-automaker.mjs --production",
     "_dev:web": "npm run dev:web --workspace=apps/ui",
     "_dev:electron": "npm run dev:electron --workspace=apps/ui",
     "_dev:electron:debug": "npm run dev:electron:debug --workspace=apps/ui",

start-automaker.mjs

@@ -0,0 +1,127 @@
+#!/usr/bin/env node
+/**
+ * Cross-platform launcher for Automaker
+ * Works on Windows (CMD, PowerShell, Git Bash) and Unix (macOS, Linux)
+ */
+
+import { spawn } from 'child_process';
+import { existsSync } from 'fs';
+import { platform } from 'os';
+import { fileURLToPath } from 'url';
+import { dirname, join } from 'path';
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = dirname(__filename);
+
+const isWindows = platform() === 'win32';
+const args = process.argv.slice(2);
+
+/**
+ * Find bash executable on Windows
+ */
+function findBashOnWindows() {
+  const possiblePaths = [
+    // Git Bash (most common)
+    'C:\\Program Files\\Git\\bin\\bash.exe',
+    'C:\\Program Files (x86)\\Git\\bin\\bash.exe',
+    // MSYS2
+    'C:\\msys64\\usr\\bin\\bash.exe',
+    'C:\\msys32\\usr\\bin\\bash.exe',
+    // Cygwin
+    'C:\\cygwin64\\bin\\bash.exe',
+    'C:\\cygwin\\bin\\bash.exe',
+    // WSL bash (available in PATH on Windows 10+)
+    'bash.exe',
+  ];
+
+  for (const bashPath of possiblePaths) {
+    if (bashPath === 'bash.exe') {
+      // Check if bash is in PATH
+      try {
+        const result = spawn.sync?.('where', ['bash.exe'], { stdio: 'pipe' });
+        if (result?.status === 0) {
+          return 'bash.exe';
+        }
+      } catch {
+        // where command failed, continue checking
+      }
+    } else if (existsSync(bashPath)) {
+      return bashPath;
+    }
+  }
+
+  return null;
+}
+
+/**
+ * Run the bash script
+ */
+function runBashScript() {
+  const scriptPath = join(__dirname, 'start-automaker.sh');
+
+  if (!existsSync(scriptPath)) {
+    console.error('Error: start-automaker.sh not found');
+    process.exit(1);
+  }
+
+  let bashCmd;
+  let bashArgs;
+
+  if (isWindows) {
+    bashCmd = findBashOnWindows();
+
+    if (!bashCmd) {
+      console.error('Error: Could not find bash on Windows.');
+      console.error('Please install Git for Windows from https://git-scm.com/download/win');
+      console.error('');
+      console.error('Alternatively, you can run these commands directly:');
+      console.error('  npm run dev:web      - Web browser mode');
+      console.error('  npm run dev:electron - Desktop app mode');
+      process.exit(1);
+    }
+
+    // Convert Windows path to Unix-style for bash
+    // Handle both C:\path and /c/path styles
+    let unixPath = scriptPath.replace(/\\/g, '/');
+    if (/^[A-Za-z]:/.test(unixPath)) {
+      // Convert C:/path to /c/path for MSYS/Git Bash
+      unixPath = '/' + unixPath[0].toLowerCase() + unixPath.slice(2);
+    }
+
+    bashArgs = [unixPath, ...args];
+  } else {
+    bashCmd = '/bin/bash';
+    bashArgs = [scriptPath, ...args];
+  }
+
+  const child = spawn(bashCmd, bashArgs, {
+    stdio: 'inherit',
+    env: {
+      ...process.env,
+      // Ensure proper terminal handling
+      TERM: process.env.TERM || 'xterm-256color',
+    },
+    // On Windows, we need to use shell for proper signal handling
+    shell: false,
+  });
+
+  child.on('error', (err) => {
+    if (err.code === 'ENOENT') {
+      console.error(`Error: Could not find bash at "${bashCmd}"`);
+      console.error('Please ensure Git Bash or another bash shell is installed.');
+    } else {
+      console.error('Error launching Automaker:', err.message);
+    }
+    process.exit(1);
+  });
+
+  child.on('exit', (code) => {
+    process.exit(code ?? 0);
+  });
+
+  // Forward signals to child process
+  process.on('SIGINT', () => child.kill('SIGINT'));
+  process.on('SIGTERM', () => child.kill('SIGTERM'));
+}
+
+runBashScript();