完善背光控制，优先使用 xset 控制。完成浏览器展示

pkg/utils/blank.go

@@ -1,13 +1,24 @@
 package utils
 
-import "os"
+import (
+	"os"
+	"os/exec"
+)
 
 // BlankOpen 打开屏幕
 func BlankOpen() {
+	if found, err := exec.LookPath("xset"); err == nil {
+		exec.Command(found, "dpms", "force", "on").Run()
+		return
+	}
 	os.WriteFile("/sys/class/graphics/fb0/blank", []byte("0"), 0644)
 }
 
 // BlankClose 关闭屏幕
 func BlankClose() {
+	if found, err := exec.LookPath("xset"); err == nil {
+		exec.Command(found, "dpms", "force", "off").Run()
+		return
+	}
 	os.WriteFile("/sys/class/graphics/fb0/blank", []byte("1"), 0644)
 }