fix: apply template description and improve description default

- Apply template description to VM when deploying from template
- Description default now matches web UI: image-type + instance-type
  joined with dashes instead of duplicating hostname

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: hi-lei

internal/verda-cli/cmd/vm/template_apply.go

@@ -154,6 +154,9 @@ func applyTemplate(tmpl *template.Template, opts *createOptions) {
 	if tmpl.HostnamePattern != "" && opts.Hostname == "" {
 		opts.Hostname = template.ExpandHostnamePattern(tmpl.HostnamePattern, opts.LocationCode)
 	}
+	if tmpl.Description != "" && opts.Description == "" {
+		opts.Description = tmpl.Description
+	}
 	// SSH keys and startup script are handled by resolveTemplateNames, not here.
 }
 

internal/verda-cli/cmd/vm/wizard.go

@@ -777,9 +777,17 @@ func stepDescription(opts *createOptions) wizard.Step {
 		Prompt:      wizard.TextInputPrompt,
 		Required:    false,
 		DependsOn:   []string{"hostname"},
-		Default: func(c map[string]any) any {
-			if h, ok := c["hostname"].(string); ok && h != "" {
-				return h
+		Default: func(_ map[string]any) any {
+			// Match web UI: image-type + instance-type joined with dash.
+			parts := make([]string, 0, 2)
+			if opts.Image != "" {
+				parts = append(parts, strings.ReplaceAll(opts.Image, ".", "-"))
+			}
+			if opts.InstanceType != "" {
+				parts = append(parts, strings.ReplaceAll(opts.InstanceType, ".", "-"))
+			}
+			if len(parts) > 0 {
+				return strings.Join(parts, "-")
 			}
 			return ""
 		},

internal/verda-cli/cmd/vm/wizard_test.go

@@ -58,8 +58,10 @@ func TestBuildCreateFlowHappyPath(t *testing.T) {
 	if opts.IsSpot {
 		t.Error("expected IsSpot=false for on-demand")
 	}
-	if opts.Description != "my-gpu" {
-		t.Errorf("expected description=my-gpu (defaulted from hostname), got %q", opts.Description)
+	// Description defaults to image-type + instance-type joined with dashes.
+	expectedDesc := "ubuntu-24-04-cuda-12-8-open-docker-1V100-6V"
+	if opts.Description != expectedDesc {
+		t.Errorf("expected description=%q, got %q", expectedDesc, opts.Description)
 	}
 }