Enable GPU in voxtype if Vulkan is available (#5005)

* Enable GPU support in Voxtype installation if Vulkan is available

* Restart Voxtype and Waybar after enabling GPU support in setup

* fix: revert changing existing migration

* fix: add new migration

* Refactor Vulkan availability check in voxtype installation and migration scripts

* Extract vulkan availability check

---------

Co-authored-by: David Heinemeier Hansson <david@hey.com>

bin/omarchy-hw-vulkan

@@ -0,0 +1,6 @@
+#!/bin/bash
+
+# Detect whether Vulkan is available.
+
+[[ -d /usr/share/vulkan/icd.d ]] &&
+  find /usr/share/vulkan/icd.d -maxdepth 1 -name "*.json" -print -quit | grep -q .

bin/omarchy-voxtype-install

@@ -11,6 +11,9 @@ if gum confirm "Install Voxtype + AI model (~150MB) to enable dictation?"; then
   cp $OMARCHY_PATH/default/voxtype/config.toml ~/.config/voxtype/
 
   voxtype setup --download --no-post-install
+  if omarchy-hw-vulkan; then
+    voxtype setup gpu --enable || true
+  fi
   voxtype setup systemd
 
   omarchy-restart-waybar

migrations/1773506226.sh

@@ -0,0 +1,16 @@
+echo "Enable GPU in voxtype if Vulkan is available"
+
+if omarchy-cmd-present voxtype; then
+  if omarchy-hw-vulkan; then
+    echo "Vulkan is available, enabling GPU in voxtype"
+    voxtype setup gpu --enable || true
+  fi
+
+  # see https://github.com/peteonrails/voxtype/commit/ce6e9919cbe54cb8808dcb3cdd3bcb3260d7b900
+  # earlier versions of voxtype hard-coded the non-GPU backend in the systemd service file,
+  # so we need to re-run setup to update it to use /usr/bin/voxtype (the symlink)
+  voxtype setup systemd
+
+  systemctl --user restart voxtype
+  omarchy-restart-waybar
+fi