## Why

Deploying MPVJ on a Raspberry Pi 3B (x64 Lite) requires complex system-level configuration (WiFi Access Point, DNS masking, service orchestration). Currently, this is a manual and error-prone process. A "one-liner" headless setup script is needed to transform a clean Raspbian installation into a dedicated mapping appliance with zero friction.

## What Changes

- **Interactive Setup Script**: A Bash-based installer (`setup.sh`) that asks for hostname, SSID, and WiFi password using a TUI (Text User Interface).
- **Automated System Hardening**: Automatic installation and configuration of `hostapd`, `dnsmasq`, `avahi-daemon`, and `nodejs`.
- **Hybrid Networking Configuration**: Setup of a static IP (192.168.4.1) for the WiFi AP while maintaining DHCP on Ethernet (eth0) for failsafe access.
- **Application Deployment**: Cloning the MPVJ repository from a user-provided URL and installing dependencies.
- **Service Orchestration**: Installation of a `systemd` service for the MPVJ backend to ensure it starts on boot.

## Capabilities

### New Capabilities
- `headless-installer`: A standalone Bash script capable of configuring a Raspberry Pi for headless MPVJ operation via a single command.

### Modified Capabilities
- `hybrid-network-control`: The existing networking logic will be updated to respect the configurations generated by the setup script.

## Impact

- **System Networking**: Modifies `/etc/dhcpcd.conf`, `/etc/hostapd/hostapd.conf`, and `/etc/dnsmasq.conf`.
- **Hostname**: Updates `/etc/hostname` and `/etc/hosts`.
- **Resource Management**: Automatically manages swap file size during the build process to prevent OOM errors on 1GB RAM devices.
- **Security**: Sets an independent WPA2 password for the WiFi AP while leaving the system SSH password untouched.