docs: user-facing docs revamp — structured product docs + per-platform setup

Replace the dev/agent-log pages with a proper user-facing doc set:

- Getting Started: Introduction (rewritten), How It Works, Quick Start.
- Host Setup: Requirements, then clean per-platform guides — Ubuntu GNOME,
  Ubuntu KDE, Fedora KDE (new), Bazzite (rewritten) — plus Running as a Service
  (desktop / headless GNOME / headless KDE).
- Connecting: Clients overview, Moonlight, Pairing & Trust.
- Configuration: host.env reference, Host CLI, Troubleshooting.
- The dev/design notes (architecture, roadmap, the deferred design specs, CI)
  move to a clearly-separated "Project & Internals" nav section.

Removes the superseded box-specific pages (gnome-box, headless-box, linux-setup,
overview). status.md (the internal progress tracker, with box IPs) is kept as a
file but dropped from the public nav. Site builds clean.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

docs-site/content/docs/fedora-kde.md

@@ -0,0 +1,80 @@
+---
+title: Fedora — KDE Plasma
+description: Set up a punktfunk host on Fedora with KDE Plasma (KWin).
+---
+
+Set up a punktfunk host on **Fedora KDE** (the KDE Plasma spin). Like the Ubuntu KDE setup, the host
+uses KWin to create per-client virtual displays — the difference is the package manager and the NVIDIA
+driver source.
+
+> Fedora KDE is the newest supported setup. The flow mirrors [Ubuntu — KDE](/docs/ubuntu-kde); this
+> page covers the Fedora-specific bits.
+
+## 1. NVIDIA driver
+
+The cleanest source on Fedora is **RPM Fusion**:
+
+```sh
+sudo dnf install \
+  https://mirrors.rpmfusion.org/free/fedora/rpmfusion-free-release-$(rpm -E %fedora).noarch.rpm \
+  https://mirrors.rpmfusion.org/nonfree/fedora/rpmfusion-nonfree-release-$(rpm -E %fedora).noarch.rpm
+sudo dnf install akmod-nvidia xorg-x11-drv-nvidia-cuda
+```
+
+Let the `akmod` build finish (a few minutes), then reboot. Verify:
+
+```sh
+nvidia-smi
+cat /sys/module/nvidia_drm/parameters/modeset   # should print Y (RPM Fusion enables it by default)
+```
+
+> With **Secure Boot** enabled, RPM Fusion's `akmods` need their key enrolled — follow the
+> [RPM Fusion Secure Boot guide](https://rpmfusion.org/Howto/Secure%20Boot), or disable Secure Boot.
+
+## 2. Dependencies
+
+```sh
+sudo dnf install gcc gcc-c++ make cmake clang clang-devel nasm git \
+  pipewire pipewire-pulseaudio wireplumber pipewire-devel \
+  wayland-devel wayland-protocols-devel libxkbcommon-devel opus-devel \
+  libdrm-devel mesa-libgbm-devel mesa-libEGL-devel mesa-libGLES-devel libva-devel \
+  ffmpeg-free-devel libei-devel
+```
+
+> Fedora ships **FFmpeg** through RPM Fusion (`ffmpeg` + `ffmpeg-devel`) or the `-free` packages
+> shown above. Either works; the host builds against the system FFmpeg.
+
+Install Rust:
+
+```sh
+curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
+```
+
+## 3. Build
+
+```sh
+git clone https://git.unom.io/unom/punktfunk.git && cd punktfunk
+cargo build --release -p punktfunk-host
+```
+
+## 4. Configure and run
+
+Same as Ubuntu KDE — write `~/.config/punktfunk/host.env` for KWin and run `serve --native`:
+
+```sh
+mkdir -p ~/.config/punktfunk
+cat > ~/.config/punktfunk/host.env <<'ENV'
+WAYLAND_DISPLAY=wayland-0
+XDG_CURRENT_DESKTOP=KDE
+PUNKTFUNK_COMPOSITOR=kwin
+PUNKTFUNK_VIDEO_SOURCE=virtual
+PUNKTFUNK_ZEROCOPY=1
+PUNKTFUNK_INPUT_BACKEND=libei
+ENV
+
+cargo run --release -p punktfunk-host -- serve --native
+```
+
+Make sure you're on a **KDE Wayland** session with **KWin ≥ 6.5.6**. Then
+[connect a client](/docs/clients). For boot-time startup, see
+[Running as a Service](/docs/running-as-a-service).