WIP: Save current work before CHORUS rebrand

- Agent roles integration progress
- Various backend and frontend updates
- Storybook cache cleanup

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

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

frontend/tailwind.config.js

@@ -4,8 +4,27 @@ module.exports = {
     "./index.html",
     "./src/**/*.{js,ts,jsx,tsx}",
   ],
+  darkMode: 'class', // Enable class-based dark mode
   theme: {
-    extend: {},
+    extend: {
+      fontFamily: {
+        'sans': ['Fira Sans', 'ui-sans-serif', 'system-ui', '-apple-system', 'BlinkMacSystemFont', 'Segoe UI', 'Roboto', 'Helvetica Neue', 'Arial', 'sans-serif'],
+      },
+      colors: {
+        dark: {
+          50: '#f8fafc',
+          100: '#f1f5f9',
+          200: '#e2e8f0',
+          300: '#cbd5e1',
+          400: '#94a3b8',
+          500: '#64748b',
+          600: '#475569',
+          700: '#334155',
+          800: '#1e293b',
+          900: '#0f172a',
+        }
+      }
+    },
   },
   plugins: [],
 }