feat: Add workflow dashboard template and utility functions

- Implemented a new HTML template for the workflow dashboard, featuring a responsive design with dark/light theme support, session statistics, and task management UI.
- Created a browser launcher utility to open HTML files in the default browser across platforms.
- Developed file utility functions for safe reading and writing of JSON and text files.
- Added path resolver utilities to validate and resolve file paths, ensuring security against path traversal attacks.
- Introduced UI utilities for displaying styled messages and banners in the console.

ccw/src/utils/browser-launcher.js

@@ -0,0 +1,49 @@
+import open from 'open';
+import { platform } from 'os';
+import { resolve } from 'path';
+
+/**
+ * Launch a file in the default browser
+ * Cross-platform compatible (Windows/macOS/Linux)
+ * @param {string} filePath - Path to HTML file
+ * @returns {Promise<void>}
+ */
+export async function launchBrowser(filePath) {
+  const absolutePath = resolve(filePath);
+
+  // Construct file:// URL based on platform
+  let url;
+  if (platform() === 'win32') {
+    // Windows: file:///C:/path/to/file.html
+    url = `file:///${absolutePath.replace(/\\/g, '/')}`;
+  } else {
+    // Unix: file:///path/to/file.html
+    url = `file://${absolutePath}`;
+  }
+
+  try {
+    // Use the 'open' package which handles cross-platform browser launching
+    await open(url);
+  } catch (error) {
+    // Fallback: try opening the file path directly
+    try {
+      await open(absolutePath);
+    } catch (fallbackError) {
+      throw new Error(`Failed to open browser: ${error.message}`);
+    }
+  }
+}
+
+/**
+ * Check if we're running in a headless/CI environment
+ * @returns {boolean}
+ */
+export function isHeadlessEnvironment() {
+  return !!(
+    process.env.CI ||
+    process.env.CONTINUOUS_INTEGRATION ||
+    process.env.GITHUB_ACTIONS ||
+    process.env.GITLAB_CI ||
+    process.env.JENKINS_URL
+  );
+}