Restore skill table renderer for list command

Author: majiayu000

internal/ui/table.go

@@ -0,0 +1,51 @@
+package ui
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/majiayu000/caude-skill-manager/internal/skill"
+	"github.com/majiayu000/caude-skill-manager/pkg/styles"
+)
+
+// RenderSkillTable renders skills as a table.
+func RenderSkillTable(skills []skill.Skill) string {
+	if len(skills) == 0 {
+		return styles.MutedStyle.Render("No skills installed yet.\n\nRun ") +
+			styles.CodeStyle.Render("sk install <github-url>") +
+			styles.MutedStyle.Render(" to install your first skill.")
+	}
+
+	var b strings.Builder
+
+	header := fmt.Sprintf("  %-25s  %-50s", "NAME", "DESCRIPTION")
+	b.WriteString(styles.TableHeaderStyle.Render(header))
+	b.WriteString("\n")
+
+	for _, s := range skills {
+		name := s.Name
+		if len(name) > 25 {
+			name = name[:22] + "..."
+		}
+
+		desc := s.Description
+		if len(desc) > 50 {
+			desc = desc[:47] + "..."
+		}
+		if desc == "" {
+			desc = styles.MutedStyle.Render("(no description)")
+		}
+
+		row := fmt.Sprintf("  %-25s  %-50s",
+			styles.SuccessStyle.Render(name),
+			styles.SkillDescStyle.Render(desc),
+		)
+		b.WriteString(row)
+		b.WriteString("\n")
+	}
+
+	b.WriteString("\n")
+	b.WriteString(styles.MutedStyle.Render(fmt.Sprintf("  %d skill(s) installed", len(skills))))
+
+	return b.String()
+}