feat: Add POC command page structure and routing

- Created CommandPocPage.tsx with basic layout structure
- Added POC-specific TypeScript interfaces and types
- Implemented basic UI components: PocHeader, PocMessageList, PocMessageBubble, PocCommandInput, PocStatusBar
- Added /command-poc route to Router.tsx
- Set up component folder structure following PRD specifications

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

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

cagents/python-cli-web-poc/simple-calc.py

@@ -0,0 +1,29 @@
+#!/usr/bin/env python3
+"""
+Simple calculator for testing input/output
+"""
+
+def main():
+    print("🧮 Simple Calculator")
+    print("-" * 20)
+    print("Enter expressions like: 2 + 3, 10 * 5, etc.")
+    print("Type 'quit' to exit")
+    
+    while True:
+        try:
+            expression = input("Calculate: ").strip()
+            
+            if expression.lower() == 'quit':
+                print("👋 Goodbye!")
+                break
+                
+            # Simple evaluation (unsafe in production, but fine for POC)
+            result = eval(expression)
+            print(f"Result: {result}")
+            
+        except Exception as e:
+            print(f"❌ Error: {e}")
+            print("Please enter a valid mathematical expression")
+
+if __name__ == "__main__":
+    main()