docs(desktop): document compute-only Thunderbolt eGPU configuration

docs/desktop/hyprland.mdx

@@ -128,7 +128,7 @@ Omarchy's stock fade (0.985 active / 0.96 inactive) is kept. Terminals get their
 
 `~/.config/uwsm/env-hyprland` (source `dot_config/uwsm/env-hyprland`, Linux desktop/laptop only) is sourced by uwsm before Hyprland starts. It sets `AQ_DRM_DEVICES` to the AMD iGPU, resolved from `/dev/dri/by-path/pci-0000:c4:00.0-card`, so Hyprland never opens the Thunderbolt eGPU (RTX 5060 Ti, compute only: AI models, CUDA). Every display, the Samsung ultrawide included, hangs off the iGPU. It leaves the variable unset if that path is missing. It also sets `__EGL_VENDOR_LIBRARY_FILENAMES` to Mesa's `50_mesa.json`, so neither Hyprland nor session apps load `libEGL_nvidia` and hold `/dev/nvidiactl`; CUDA does not use EGL.
 
-Outside chezmoi, `/etc/modprobe.d/thunderbolt-egpu.conf` sets `options thunderbolt host_reset=0`. By default the thunderbolt driver resets the USB4 host router at boot, dropping the firmware-built PCIe tunnel while the early-loaded `nvidia` driver initialises the eGPU (Xid 79, GPU stuck until reboot).
+The system side (kernel cmdline, `nvidia` without KMS, `thunderbolt host_reset=0`) lives outside chezmoi, see [Thunderbolt eGPU](/desktop#thunderbolt-egpu-compute-only).
 
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