feat: add Windows-style forward slash flag support to CLI argument parser

- Add runtime OS detection for Windows platform
- Support `/flag` syntax for Windows command line
- Handle Windows colon delimiter `/flag:value` format
- Maintain backward compatibility with Unix-style flags
- Add comprehensive test coverage for flag extraction
- Support both `:` and `=` delimiters on Windows
- Preserve existing dash-based flag parsing logic

internal/cli/flags_test.go

@@ -455,3 +455,30 @@ func TestBuildChatOptionsWithImageParameters(t *testing.T) {
 		assert.Contains(t, err.Error(), "can only be used with --image-file")
 	})
 }
+
+func TestExtractFlag(t *testing.T) {
+	tests := []struct {
+		name     string
+		arg      string
+		expected string
+	}{
+		// Unix-style flags
+		{"long flag", "--help", "help"},
+		{"long flag with value", "--pattern=analyze", "pattern"},
+		{"short flag", "-h", "h"},
+		{"short flag with value", "-p=test", "p"},
+		{"single dash", "-", ""},
+		{"double dash only", "--", ""},
+
+		// Non-flags
+		{"regular arg", "analyze", ""},
+		{"path arg", "./file.txt", ""},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			result := extractFlag(tt.arg)
+			assert.Equal(t, tt.expected, result)
+		})
+	}
+}

internal/cli/help.go

@@ -5,6 +5,7 @@ import (
 	"io"
 	"os"
 	"reflect"
+	"runtime"
 	"strings"
 
 	"github.com/danielmiessler/fabric/internal/i18n"
@@ -179,7 +180,7 @@ func ensureI18nInitialized() {
 func detectLanguageFromArgs() string {
 	args := os.Args[1:]
 	for i, arg := range args {
-		if arg == "--language" || arg == "-g" {
+		if arg == "--language" || arg == "-g" || (runtime.GOOS == "windows" && arg == "/g") {
 			if i+1 < len(args) {
 				return args[i+1]
 			}
@@ -187,6 +188,10 @@ func detectLanguageFromArgs() string {
 			return strings.TrimPrefix(arg, "--language=")
 		} else if strings.HasPrefix(arg, "-g=") {
 			return strings.TrimPrefix(arg, "-g=")
+		} else if runtime.GOOS == "windows" && strings.HasPrefix(arg, "/g:") {
+			return strings.TrimPrefix(arg, "/g:")
+		} else if runtime.GOOS == "windows" && strings.HasPrefix(arg, "/g=") {
+			return strings.TrimPrefix(arg, "/g=")
 		}
 	}
 	return ""