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/src/index.css

@@ -3,7 +3,7 @@
 @tailwind utilities;
 
 :root {
-  font-family: Inter, system-ui, Avenir, Helvetica, Arial, sans-serif;
+  font-family: 'Fira Sans', ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
   line-height: 1.5;
   font-weight: 400;
 
@@ -18,6 +18,12 @@
   -webkit-text-size-adjust: 100%;
 }
 
+/* Dark mode color overrides for root */
+:root.dark {
+  color: rgba(255, 255, 255, 0.87);
+  background-color: #0f172a;
+}
+
 body {
   margin: 0;
   min-width: 320px;