Add complete REST API for lighting control

- Migrated from websockets to aiohttp for unified HTTP/WebSocket server
- Added REST endpoints: /api/pattern, /api/parameters, /api/state, /api/tempo/reset
- Implemented color palette API with 8-slot system and selected colors
- First selected color (index 0) is used as primary RGB for patterns
- All operations now available via simple HTTP requests (no WebSocket needed)
- Added comprehensive documentation: FRONTEND_API.md, COLOR_PALETTE_API.md
- Added test scripts: test_rest_api.sh, test_color_patterns.py
- Updated test/test_control_server.py for new /ws WebSocket path
- Configuration persistence via lighting_config.json
- Pattern parameters (n1-n4, brightness, delay) controllable via API
- WebSocket still available at /ws for legacy support

test_pattern_color.py

@@ -0,0 +1,49 @@
+#!/usr/bin/env python3
+"""
+Test script to verify patterns are using the selected palette color
+"""
+import asyncio
+import aiohttp
+import json
+
+async def test_pattern_with_color():
+    """Test sending a pattern and verifying the color"""
+    
+    # Connect to WebSocket
+    session = aiohttp.ClientSession()
+    try:
+        async with session.ws_connect('http://localhost:8765/ws') as ws:
+            print("✅ Connected to WebSocket at ws://localhost:8765/ws")
+            
+            # Send pattern change to 'on'
+            msg = {
+                "type": "pattern_change",
+                "data": {"pattern": "on"}
+            }
+            print(f"\n📤 Sending: {json.dumps(msg, indent=2)}")
+            await ws.send_json(msg)
+            
+            # Wait a moment
+            await asyncio.sleep(1)
+            
+            # Send alternating pattern
+            msg = {
+                "type": "pattern_change",
+                "data": {"pattern": "alternating"}
+            }
+            print(f"\n📤 Sending: {json.dumps(msg, indent=2)}")
+            await ws.send_json(msg)
+            
+            await asyncio.sleep(2)
+            
+            print("\n✅ Patterns sent successfully!")
+            print("Check the LED bar to see if it's using purple RGB(128, 0, 128)")
+            
+    except Exception as e:
+        print(f"❌ Error: {e}")
+    finally:
+        await session.close()
+
+if __name__ == "__main__":
+    asyncio.run(test_pattern_with_color())
+