fix(actions): Improve clipboard operations with direct buffer input

- Replace echo command piping with bytes.NewBufferString for clipboard operations on Darwin
- Replace echo command piping with bytes.NewBufferString for clipboard operations on Linux
- Remove unused "fmt" import from actions_linux.go
- Add "bytes" import to both platform-specific action files
- Simplify stdin handling by using direct buffer instead of spawning echo subprocess
- Improves performance and reduces subprocess overhead for clipboard operations

Author: OffLine911

actions_darwin.go

@@ -4,6 +4,7 @@
 package main
 
 import (
+	"bytes"
 	"fmt"
 	"os/exec"
 )
@@ -21,7 +22,7 @@ func (as *ActionService) OpenURL(url string) error {
 
 func (as *ActionService) SetClipboard(content string) error {
 	cmd := exec.Command("pbcopy")
-	cmd.Stdin = exec.Command("echo", "-n", content).Stdout
+	cmd.Stdin = bytes.NewBufferString(content)
 	return cmd.Run()
 }
 

actions_linux.go

@@ -4,7 +4,7 @@
 package main
 
 import (
-	"fmt"
+	"bytes"
 	"os/exec"
 )
 
@@ -22,12 +22,12 @@ func (as *ActionService) OpenURL(url string) error {
 func (as *ActionService) SetClipboard(content string) error {
 	// Try xclip first, then xsel as fallback
 	cmd := exec.Command("xclip", "-selection", "clipboard")
-	cmd.Stdin = exec.Command("echo", "-n", content).Stdout
+	cmd.Stdin = bytes.NewBufferString(content)
 	err := cmd.Run()
 	if err != nil {
 		// Fallback to xsel
 		cmd = exec.Command("xsel", "--clipboard", "--input")
-		cmd.Stdin = exec.Command("echo", "-n", content).Stdout
+		cmd.Stdin = bytes.NewBufferString(content)
 		return cmd.Run()
 	}
 	return nil