refactor: refactor system configuration detection

- Add system analysis to configuration initialization
- Simplify distribution detection to use runtime architecture instead of `lsb_release` command
- Improve username detection by checking both USER and USERNAME environment variables
- Replace direct environment variable access with system configuration methods in command executor

Signed-off-by: wecoding <wecoding@yeah.net>

Author: coding-hui

internal/options/config.go

@@ -376,6 +376,8 @@ func EnsureConfig() (Config, error) {
 		return c, err
 	}
 
+	c.System = system.Analyse()
+
 	return c, nil
 }
 

internal/system/system.go

@@ -86,12 +86,7 @@ func GetOperatingSystem() OperatingSystem {
 }
 
 func GetDistribution() string {
-	dist, err := runner.Run("lsb_release", "-sd")
-	if err != nil {
-		return ""
-	}
-
-	return strings.Trim(strings.TrimSpace(dist), "\"")
+	return runtime.GOARCH
 }
 
 func GetShell() string {
@@ -122,12 +117,14 @@ func GetHomeDirectory() string {
 }
 
 func GetUsername() string {
-	name, err := runner.Run("echo", os.Getenv("USER"))
-	if err != nil {
-		return ""
+	name := strings.TrimSpace(os.Getenv("USER"))
+
+	if name == "" {
+		name = strings.TrimSpace(os.Getenv("USERNAME"))
 	}
-	name = strings.TrimSpace(name)
+
 	if name == "" {
+		var err error
 		name, err = runner.Run("whoami")
 		if err != nil {
 			return ""

internal/ui/coders/commands.go

@@ -10,7 +10,6 @@ import (
 	"io/fs"
 	"os"
 	"path/filepath"
-	"runtime"
 	"strings"
 
 	"github.com/coding-hui/common/util/fileutil"
@@ -556,14 +555,10 @@ func (c *CommandExecutor) exec(_ context.Context, input string) error {
 	}
 
 	// Get current user and OS info
-	currentUser := os.Getenv("USER")
-	if currentUser == "" {
-		currentUser = os.Getenv("USERNAME")
-	}
-	
-	osInfo := runtime.GOOS
-	archInfo := runtime.GOARCH
-	
+	currentUser := c.coder.cfg.System.GetUsername()
+	osInfo := c.coder.cfg.System.GetOperatingSystem()
+	archInfo := c.coder.cfg.System.GetDistribution()
+
 	system := llms.SystemChatMessage{Content: strings.Join([]string{
 		"You are a helpful terminal assistant.",
 		"Convert the user's request into a single-line POSIX shell command.",