feat(ccw): migrate backend to TypeScript

- Convert 40 JS files to TypeScript (CLI, tools, core, MCP server)
- Add Zod for runtime parameter validation
- Add type definitions in src/types/
- Keep src/templates/ as JavaScript (dashboard frontend)
- Update bin entries to use dist/
- Add tsconfig.json with strict mode
- Add backward-compatible exports for tests
- All 39 tests passing

Breaking changes: None (backward compatible)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

ccw/src/commands/serve.ts

@@ -0,0 +1,76 @@
+import { startServer } from '../core/server.js';
+import { launchBrowser } from '../utils/browser-launcher.js';
+import { resolvePath, validatePath } from '../utils/path-resolver.js';
+import chalk from 'chalk';
+import type { Server } from 'http';
+
+interface ServeOptions {
+  port?: number;
+  path?: string;
+  browser?: boolean;
+}
+
+/**
+ * Serve command handler - starts dashboard server with live path switching
+ * @param {Object} options - Command options
+ */
+export async function serveCommand(options: ServeOptions): Promise<void> {
+  const port = options.port || 3456;
+
+  // Validate project path
+  let initialPath = process.cwd();
+  if (options.path) {
+    const pathValidation = validatePath(options.path, { mustExist: true });
+    if (!pathValidation.valid || !pathValidation.path) {
+      console.error(chalk.red(`\n  Error: ${pathValidation.error}\n`));
+      process.exit(1);
+    }
+    initialPath = pathValidation.path;
+  }
+
+  console.log(chalk.blue.bold('\n  CCW Dashboard Server\n'));
+  console.log(chalk.gray(`  Initial project: ${initialPath}`));
+  console.log(chalk.gray(`  Port: ${port}\n`));
+
+  try {
+    // Start server
+    console.log(chalk.cyan('  Starting server...'));
+    const server = await startServer({ port, initialPath });
+
+    const url = `http://localhost:${port}`;
+    console.log(chalk.green(`  Server running at ${url}`));
+
+    // Open browser
+    if (options.browser !== false) {
+      console.log(chalk.cyan('  Opening in browser...'));
+      try {
+        await launchBrowser(url);
+        console.log(chalk.green.bold('\n  Dashboard opened in browser!'));
+      } catch (err) {
+        const error = err as Error;
+        console.log(chalk.yellow(`\n  Could not open browser: ${error.message}`));
+        console.log(chalk.gray(`  Open manually: ${url}`));
+      }
+    }
+
+    console.log(chalk.gray('\n  Press Ctrl+C to stop the server\n'));
+
+    // Handle graceful shutdown
+    process.on('SIGINT', () => {
+      console.log(chalk.yellow('\n  Shutting down server...'));
+      server.close(() => {
+        console.log(chalk.green('  Server stopped.\n'));
+        process.exit(0);
+      });
+    });
+
+  } catch (error) {
+    const err = error as Error & { code?: string };
+    console.error(chalk.red(`\n  Error: ${err.message}\n`));
+    if (err.code === 'EADDRINUSE') {
+      console.error(chalk.yellow(`  Port ${port} is already in use.`));
+      console.error(chalk.gray(`  Try a different port: ccw serve --port ${port + 1}\n`));
+    }
+    process.exit(1);
+  }
+}