fix: extend redbear-full DRM greeter wait

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

local/recipes/system/redbear-greeter/source/src/main.rs

@@ -207,6 +207,9 @@ impl GreeterDaemon {
         command.env("XCURSOR_THEME", "Pop");
         command.env("XKB_CONFIG_ROOT", "/usr/share/X11/xkb");
         command.env("WAYLAND_DISPLAY", &self.wayland_display);
+        if let Ok(wait_seconds) = env::var("REDBEAR_DRM_WAIT_SECONDS") {
+            command.env("REDBEAR_DRM_WAIT_SECONDS", wait_seconds);
+        }
     }
 
     fn activate_vt(&self, vt: u32) -> Result<(), String> {