feat(layout): finalize p01 and p02 changes

Complete UI foundation and app layout implementation, stabilize container health checks, and archive both OpenSpec changes after verification.

frontend/Dockerfile

@@ -19,7 +19,7 @@ EXPOSE 5173
 
 # Health check
 HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
-  CMD wget --no-verbose --tries=1 --spider http://localhost:5173 || exit 1
+  CMD wget --no-verbose --tries=1 --spider http://127.0.0.1:5173 || exit 1
 
 # Start the application
 CMD ["node", "build/index.js"]