feat: interactive list when running empty root command

cmd/root.go

@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"os"
 	"os/exec"
+	"sort"
 
 	"github.com/spf13/cobra"
 	"github.com/yeho/doks/internal/config"
@@ -39,7 +40,7 @@ and manuals. Access documents by key or search through content.`,
 			searchDocuments(searchFlag)
 			return
 		}
-		cmd.Help()
+		showInteractiveList()
 	},
 }
 
@@ -203,3 +204,33 @@ func displayFile(filePath string, highlightLine int) {
 	}
 	fmt.Print(string(content))
 }
+
+func showInteractiveList() {
+	reg, err := registry.Load(cfg.RegistryPath())
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Error loading registry: %v\n", err)
+		os.Exit(1)
+	}
+
+	entries := reg.List()
+	if len(entries) == 0 {
+		fmt.Println(tui.NoResultsStyle.Render("No documents registered. Use 'doks add <file>' to add documents."))
+		return
+	}
+
+	// Sort by key
+	sort.Slice(entries, func(i, j int) bool {
+		return entries[i].Key < entries[j].Key
+	})
+
+	selected, err := tui.RunList(entries)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Error running TUI: %v\n", err)
+		os.Exit(1)
+	}
+
+	if selected != nil {
+		filePath := cfg.FilePath(selected.Filename)
+		displayFile(filePath, 0)
+	}
+}