Initial commit: WLED Screen Controller with FastAPI server and Home Assistant integration

This is a complete WLED ambient lighting controller that captures screen border pixels
and sends them to WLED devices for immersive ambient lighting effects.

## Server Features:
- FastAPI-based REST API with 17+ endpoints
- Real-time screen capture with multi-monitor support
- Advanced LED calibration system with visual GUI
- API key authentication with labeled tokens
- Per-device brightness control (0-100%)
- Configurable FPS (1-60), border width, and color correction
- Persistent device storage (JSON-based)
- Comprehensive Web UI with dark/light themes
- Docker support with docker-compose
- Windows monitor name detection via WMI (shows "LG ULTRAWIDE" etc.)

## Web UI Features:
- Device management (add, configure, remove WLED devices)
- Real-time status monitoring with FPS metrics
- Settings modal for device configuration
- Visual calibration GUI with edge testing
- Brightness slider per device
- Display selection with friendly monitor names
- Token-based authentication with login/logout
- Responsive button layout

## Calibration System:
- Support for any LED strip layout (clockwise/counterclockwise)
- 4 starting position options (corners)
- Per-edge LED count configuration
- Visual preview with starting position indicator
- Test buttons to light up individual edges
- Smart LED ordering based on start position and direction

## Home Assistant Integration:
- Custom HACS integration
- Switch entities for processing control
- Sensor entities for status and FPS
- Select entities for display selection
- Config flow for easy setup
- Auto-discovery of devices from server

## Technical Stack:
- Python 3.11+
- FastAPI + uvicorn
- mss (screen capture)
- httpx (async WLED client)
- Pydantic (validation)
- WMI (Windows monitor detection)
- Structlog (logging)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

server/Dockerfile

@@ -0,0 +1,39 @@
+FROM python:3.11-slim
+
+LABEL maintainer="Alexei Dolgolyov <dolgolyov.alexei@gmail.com>"
+LABEL description="WLED Screen Controller - Ambient lighting based on screen content"
+
+WORKDIR /app
+
+# Install system dependencies for screen capture
+RUN apt-get update && apt-get install -y \
+    libxcb1 \
+    libxcb-randr0 \
+    libxcb-shm0 \
+    libxcb-xfixes0 \
+    libxcb-shape0 \
+    && rm -rf /var/lib/apt/lists/*
+
+# Copy requirements and install Python dependencies
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+# Copy application code
+COPY src/ ./src/
+COPY config/ ./config/
+
+# Create directories for data and logs
+RUN mkdir -p /app/data /app/logs
+
+# Expose API port
+EXPOSE 8080
+
+# Health check
+HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
+    CMD python -c "import httpx; httpx.get('http://localhost:8080/health', timeout=5.0)" || exit 1
+
+# Set Python path
+ENV PYTHONPATH=/app/src
+
+# Run the application
+CMD ["uvicorn", "wled_controller.main:app", "--host", "0.0.0.0", "--port", "8080"]