style(tools): unify console output with [I/W/E] [Module] color-coded format

- Add ANSI color coding: [I]=green, [W]=yellow, [E]=red
- Format: [Level] [Module] message with 4-char indent for data rows
- Error detail lines use |-> tree connector
- Remove extra blank lines between outputs (except list)
- Modules: CLI, Preview, Builder, Server, Watcher

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

tools/cli/create.go

@@ -49,7 +49,7 @@ func runCreate(c *cli.Context) error {
 
 		if info, err := os.Stat(styleDir); err == nil {
 			if info.IsDir() {
-				fmt.Printf("  [skip] '%s' already exists\n", styleName)
+				fmt.Printf("\033[32m[I]\033[0m [CLI] '%s' already exists, skipped\n", styleName)
 				continue
 			}
 			return fmt.Errorf("'%s' exists but is not a directory", styleName)
@@ -79,7 +79,7 @@ func runCreate(c *cli.Context) error {
 			created++
 		}
 
-		fmt.Printf("  Created style '%s' with %d template files\n", styleName, created)
+		fmt.Printf("\033[32m[I]\033[0m [CLI] Created style '%s' with %d template files\n", styleName, created)
 	}
 
 	return nil

tools/cli/delete.go

@@ -37,14 +37,14 @@ func runDelete(c *cli.Context) error {
 		styleDir := filepath.Join(folder, styleName)
 
 		if _, err := os.Stat(styleDir); os.IsNotExist(err) {
-			fmt.Printf("  [skip] '%s' does not exist\n", styleName)
+			fmt.Printf("\033[33m[W]\033[0m [CLI] '%s' does not exist, skipped\n", styleName)
 			continue
 		}
 
 		if err := os.RemoveAll(styleDir); err != nil {
 			return fmt.Errorf("cannot delete %s: %w", styleDir, err)
 		}
-		fmt.Printf("  Deleted style '%s'\n", styleName)
+		fmt.Printf("\033[32m[I]\033[0m [CLI] Deleted style '%s'\n", styleName)
 	}
 
 	return nil

tools/cli/dev.go

@@ -48,7 +48,7 @@ func runDev(c *cli.Context) error {
 
 	// Verify node_modules are installed
 	if _, err := os.Stat(filepath.Join(serverDir, "node_modules")); os.IsNotExist(err) {
-		fmt.Println("Installing Node.js dependencies...")
+		fmt.Println("\033[32m[I]\033[0m [Builder] Installing Node.js dependencies...")
 		cmd := exec.Command("npm", "install")
 		cmd.Dir = serverDir
 		cmd.Stdout = os.Stdout
@@ -64,7 +64,7 @@ func runDev(c *cli.Context) error {
 	initCmd.Stdout = os.Stdout
 	initCmd.Stderr = os.Stderr
 	if err := initCmd.Run(); err != nil {
-		fmt.Println("Warning: initial preview generation failed, starting anyway...")
+		fmt.Println("\033[33m[W]\033[0m [Builder] Initial preview generation failed, starting anyway")
 	}
 
 	// Start the Node.js dev server
@@ -78,8 +78,8 @@ func runDev(c *cli.Context) error {
 		return fmt.Errorf("failed to start dev server: %w", err)
 	}
 
-	fmt.Printf("\nDev server running at http://localhost:%d\n", port)
-	fmt.Print("Press Ctrl+C to stop.\n\n")
+	fmt.Printf("\033[32m[I]\033[0m [Server] Dev server running at http://localhost:%d\n", port)
+	fmt.Print("\033[32m[I]\033[0m [Server] Press Ctrl+C to stop\n")
 
 	// Handle graceful shutdown
 	sigCh := make(chan os.Signal, 1)
@@ -87,7 +87,7 @@ func runDev(c *cli.Context) error {
 
 	go func() {
 		<-sigCh
-		fmt.Println("\nShutting down...")
+		fmt.Println("\033[32m[I]\033[0m [Server] Shutting down")
 		if err := serverCmd.Process.Signal(os.Interrupt); err != nil {
 			serverCmd.Process.Kill()
 		}

tools/cli/list.go

@@ -37,7 +37,7 @@ func runList(c *cli.Context) error {
 	}
 
 	absDir, _ := filepath.Abs(folder)
-	fmt.Printf("Available styles in '%s' (%d):\n", filepath.Base(absDir), len(themes))
+	fmt.Printf("\033[32m[I]\033[0m [Preview] Available styles in '%s' (%d):\n", filepath.Base(absDir), len(themes))
 
 	sort.Strings(themes)
 	for _, t := range themes {
@@ -51,7 +51,7 @@ func runList(c *cli.Context) error {
 			}
 			return nil
 		})
-		fmt.Printf("  %-16s (%d .tmpl files)\n", t, count)
+		fmt.Printf("\033[32m[I]\033[0m [Preview]    %-16s (%d .tmpl files)\n", t, count)
 	}
 	return nil
 }

tools/cli/preview.go

@@ -2,7 +2,6 @@ package cli
 
 import (
 	"fmt"
-	"log"
 	"path/filepath"
 
 	"github.com/urfave/cli/v2"
@@ -78,7 +77,7 @@ func runPreview(c *cli.Context) error {
 
 	preview.PrintDetailedSummary(result, folder, cfg)
 
-	log.Printf("Wrote %d themes x %d templates to %s",
+	fmt.Printf("\033[32m[I]\033[0m [Preview] Wrote %d themes x %d templates to %s\n",
 		len(result.Summaries), len(cfg.Templates), outputPath)
 
 	return nil