feat(list): add version indicators and color coding

Add visual indicators to distinguish version status in `dtvem list` output:

- 🌐 emoji for global version
- 📍 emoji for local version (from .dtvem/runtimes.json)
- Green highlighting for active version (local > global priority)

Changes:
- Export LocalVersion() in config package
- Add ActiveVersion() and DimText() helpers in ui package
- Update list.go to show indicators and color coding

Example output:
  Node.js:
    18.0.0
    20.0.0  🌐
    22.0.0  📍    ← green (active)

Closes #8

Author: CalvinAllen

src/cmd/list.go

@@ -1,11 +1,18 @@
 package cmd
 
 import (
+	"github.com/dtvem/dtvem/src/internal/config"
 	"github.com/dtvem/dtvem/src/internal/runtime"
 	"github.com/dtvem/dtvem/src/internal/ui"
 	"github.com/spf13/cobra"
 )
 
+// Version indicator emojis
+const (
+	globalIndicator = "🌐"
+	localIndicator  = "📍"
+)
+
 var listCmd = &cobra.Command{
 	Use:   "list [runtime]",
 	Short: "List installed versions",
@@ -49,15 +56,13 @@ func listAllRuntimes() {
 		}
 
 		hasAny = true
+		runtimeName := provider.Name()
 		globalVersion, _ := provider.GlobalVersion()
+		localVersion, _ := config.LocalVersion(runtimeName)
 
 		ui.Printf("  %s:\n", ui.Highlight(provider.DisplayName()))
 		for _, v := range versions {
-			if v.String() == globalVersion {
-				ui.Printf("    %s (global)\n", ui.HighlightVersion(v.String()))
-			} else {
-				ui.Printf("    %s\n", ui.HighlightVersion(v.String()))
-			}
+			printVersionLine(v.String(), globalVersion, localVersion)
 		}
 	}
 
@@ -89,13 +94,37 @@ func listSingleRuntime(runtimeName string) {
 	}
 
 	globalVersion, _ := provider.GlobalVersion()
+	localVersion, _ := config.LocalVersion(runtimeName)
 
 	for _, v := range versions {
-		if v.String() == globalVersion {
-			ui.Printf("  %s (global)\n", ui.HighlightVersion(v.String()))
-		} else {
-			ui.Printf("  %s\n", ui.HighlightVersion(v.String()))
-		}
+		printVersionLine(v.String(), globalVersion, localVersion)
+	}
+}
+
+// printVersionLine prints a single version with appropriate indicators and colors
+// Active version (local > global) is shown in green
+// Indicators: 🌐 for global, 📍 for local
+func printVersionLine(version, globalVersion, localVersion string) {
+	isGlobal := version == globalVersion
+	isLocal := version == localVersion
+
+	// Determine if this is the active version (local takes priority over global)
+	isActive := isLocal || (isGlobal && localVersion == "")
+
+	// Build the indicator string
+	var indicators string
+	if isLocal {
+		indicators += " " + localIndicator
+	}
+	if isGlobal {
+		indicators += " " + globalIndicator
+	}
+
+	// Format and print
+	if isActive {
+		ui.Printf("    %s%s\n", ui.ActiveVersion(version), indicators)
+	} else {
+		ui.Printf("    %s%s\n", version, indicators)
 	}
 }
 

src/internal/config/version.go

@@ -151,6 +151,11 @@ func FindLocalRuntimesFile() (string, error) {
 	return "", fmt.Errorf("no .dtvem/runtimes.json file found")
 }
 
+// LocalVersion reads the local version for a runtime by walking up the directory tree
+func LocalVersion(runtimeName string) (string, error) {
+	return findLocalVersion(runtimeName)
+}
+
 // GlobalVersion reads the global version for a runtime
 func GlobalVersion(runtimeName string) (string, error) {
 	configPath := GlobalConfigPath()

src/internal/ui/output.go

@@ -81,6 +81,16 @@ func HighlightVersion(version string) string {
 	return color.New(color.FgMagenta, color.Bold).Sprint(version)
 }
 
+// ActiveVersion prints a version string in green (for currently active version)
+func ActiveVersion(version string) string {
+	return color.New(color.FgGreen, color.Bold).Sprint(version)
+}
+
+// DimText prints text in a dimmed/gray color (for inactive items)
+func DimText(text string) string {
+	return color.New(color.Faint).Sprint(text)
+}
+
 // PromptInstall prompts the user to install a missing version.
 // Returns true if the user wants to install, false otherwise.
 // Respects DTVEM_AUTO_INSTALL environment variable: