Move NVIDIA env setup to Hyprland Lua

Evaluate NVIDIA session env vars from default/hypr/nvidia.lua during Hyprland startup instead of appending them to each user's envs.lua during setup. This removes the per-user NVIDIA setup script execution while preserving the GSP/non-GSP detection.

default/hypr/envs.lua

@@ -35,6 +35,9 @@ end
 table.insert(kept, 1, bin_dir)
 hl.env("PATH", table.concat(kept, ":"))
 
+-- Hardware-specific environment.
+require("default.hypr.nvidia")
+
 hl.config({
   xwayland = {
     force_zero_scaling = true,

default/hypr/helpers.lua

@@ -6,6 +6,21 @@ local function shell_quote(value)
   return "'" .. tostring(value):gsub("'", "'\\''") .. "'"
 end
 
+o.shell_quote = shell_quote
+
+function o.shell_succeeds(command)
+  local ok, _, code = os.execute(command .. " >/dev/null 2>&1")
+  return ok == true or ok == 0 or code == 0
+end
+
+function o.cmd_present(command)
+  return o.shell_succeeds("command -v " .. shell_quote(command))
+end
+
+function o.cmd_missing(command)
+  return not o.cmd_present(command)
+end
+
 local function command_from(value, description)
   if type(value) ~= "table" then
     return value

default/hypr/nvidia.lua

@@ -0,0 +1,15 @@
+local paths = require("default.hypr.paths")
+
+local nvidia_gsp = paths.omarchy_path .. "/bin/omarchy-hw-nvidia-gsp"
+local nvidia_without_gsp = paths.omarchy_path .. "/bin/omarchy-hw-nvidia-without-gsp"
+
+if o.shell_succeeds("lspci | grep -qi nvidia") then
+  if o.shell_succeeds(o.shell_quote(nvidia_gsp)) then
+    hl.env("NVD_BACKEND", "direct")
+    hl.env("LIBVA_DRIVER_NAME", "nvidia")
+    hl.env("__GLX_VENDOR_LIBRARY_NAME", "nvidia")
+  elseif o.shell_succeeds(o.shell_quote(nvidia_without_gsp)) then
+    hl.env("NVD_BACKEND", "egl")
+    hl.env("__GLX_VENDOR_LIBRARY_NAME", "nvidia")
+  end
+end