feat: add OpenVINO NPU worker support and frontend UI components for model management and image generation

README.md

@@ -37,6 +37,7 @@
 1. **Check compatibility:** Prebuilt Linux backends are built on Ubuntu 24.04 and require **glibc 2.38+**. Run `ldd --version` to verify.
 2. **Launch:** Open a terminal in the project folder and run **`./linux.sh`** (downloads portable Node.js and pre-compiled GPU backend binaries on first run).
    - For maximum AMD GPU performance, use **`./linux.sh --max-perf`** on first setup (adds the ROCm backend).
+   - For Intel Core Ultra NPU support, install the Intel Linux NPU driver, then run **`./linux.sh --setup-openvino`**.
 3. **Add Models:** Drop `.safetensors`, `.gguf`, or `.ckpt` weights into `app/models/` (or download them via the **Model Manager** tab in the UI).
 4. **Generate:** Open `http://localhost:1420` in your browser, select your model, and write a prompt.
 
@@ -100,6 +101,7 @@ local-ai-image-generator/
 | **NVIDIA** | Vulkan | CPU | No reliable prebuilt Linux CUDA binary is currently available. NVIDIA GPUs use Vulkan. |
 | **AMD Radeon** | ROCm | Vulkan | ROCm provides best AMD performance when host ROCm drivers are available. |
 | **Intel Arc / integrated** | Vulkan | CPU | Cross-vendor Vulkan support. |
+| **Intel Core Ultra NPU** | OpenVINO NPU | CPU | Requires the Intel Linux NPU driver, kernel 6.6+, Python 3, and `./linux.sh --setup-openvino`. |
 | **Integrated / None** | CPU | — | Runs on logical CPU threads (slow). |
 
 ### macOS
@@ -110,13 +112,16 @@ local-ai-image-generator/
 | **Intel Mac** | Source build required | CPU | Official prebuilt macOS backend is Apple Silicon only. |
 
 **System requirements:**
+- **64-bit Windows 10 or Windows 11** is required for the portable Node.js 22 runtime used by the Windows launcher.
 - **glibc 2.38 or newer** is required for the prebuilt Linux backends (Ubuntu 24.04, Fedora 40+, etc.).
 - The setup script will warn you if your glibc is older. You can still run setup, but the prebuilt backends will not start.
+- **Linux OpenVINO NPU:** Intel Core Ultra, x86_64 Linux, kernel 6.6+, a working `/dev/accel/accel0` device, Python 3 with `venv`, and the Intel Linux NPU driver are required.
 - **Apple Silicon (M1 or newer)** is required for the prebuilt macOS Metal backend.
 
 **Linux setup modes:**
 - **Default (`./linux.sh`)**: Downloads CPU + Vulkan backends (~120–150 MB).
 - **Maximum Performance (`./linux.sh --max-perf`)**: Also downloads the ROCm backend. Total download ~1.3 GB.
+- **Intel NPU (`./linux.sh --setup-openvino`)**: Creates a local OpenVINO Python environment and verifies that the Intel NPU driver exposes an `NPU` device.
 
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