fix: alias argument expansion with flags and spaces

Fixes an issue where alias arguments containing spaces or flags were being split incorrectly by using strings.Fields on the substituted command string. Instead, the command string is tokenized first and then substitution happens on each token.

Also disables Cobra flag parsing for aliases dynamically so that arguments and flags correctly cascade down to the target command instead of throwing unknown flag errors.

service/fileconfig.go

@@ -3,6 +3,7 @@ package service
 import (
 	"encoding/json"
 	"errors"
+	"fmt"
 	"os"
 	"os/user"
 	"path/filepath"
@@ -155,11 +156,30 @@ func (c *fileConfig) Save() error {
 func ExpandAlias(alias *Alias, args []string, currentUser string) []string {
 	cmd := alias.Command
 	cmd = strings.ReplaceAll(cmd, "$me", currentUser)
-	if len(args) > 0 {
-		cmd = strings.ReplaceAll(cmd, "$@", strings.Join(args, " "))
+
+	parts := strings.Fields(cmd)
+	var result []string
+
+	for _, part := range parts {
+		if part == "$@" {
+			result = append(result, args...)
+			continue
+		}
+
+		hasCatchAll := strings.Contains(part, "$@")
+		replaced := part
+
+		if hasCatchAll {
+			replaced = strings.ReplaceAll(replaced, "$@", strings.Join(args, " "))
+		}
+
+		for i := len(args) - 1; i >= 0; i-- {
+			placeholder := fmt.Sprintf("$%d", i+1)
+			replaced = strings.ReplaceAll(replaced, placeholder, args[i])
+		}
+
+		result = append(result, replaced)
 	}
-	for i, arg := range args {
-		cmd = strings.ReplaceAll(cmd, "$"+string(rune('1'+i)), arg)
-	}
-	return strings.Fields(cmd)
+
+	return result
 }