diff --git a/cmd/cache.go b/cmd/cache.go
new file mode 100644
index 0000000..0f68bb3
--- /dev/null
+++ b/cmd/cache.go
@@ -0,0 +1,135 @@
+package cmd
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+
+	"github.com/spf13/cobra"
+	"zsvo/pkg/builder"
+)
+
+var CacheCmd = &cobra.Command{
+	Use:   "cache",
+	Short: "Manage build cache",
+	Long:  `Clean or show information about build cache`,
+}
+
+var CleanCacheCmd = &cobra.Command{
+	Use:   "clean",
+	Short: "Clean build cache",
+	Long:  `Remove all cached packages, sources, and build artifacts`,
+	RunE: func(cmd *cobra.Command, args []string) error {
+		workDir, _ := cmd.Flags().GetString("work-dir")
+		if workDir == "" {
+			workDir = "/tmp/pkg-work"
+		}
+
+		b := builder.NewBuilder(workDir)
+		
+		// Show cache size before cleaning
+		if size, err := b.GetCacheSize(); err == nil {
+			fmt.Printf("Cache size: %s\n", formatBytes(size))
+		}
+
+		if err := b.CleanCache(); err != nil {
+			return fmt.Errorf("failed to clean cache: %w", err)
+		}
+
+		fmt.Printf("Cache cleaned successfully\n")
+		return nil
+	},
+}
+
+var InfoCacheCmd = &cobra.Command{
+	Use:   "info",
+	Short: "Show cache information",
+	Long:  `Display detailed information about build cache usage`,
+	RunE: func(cmd *cobra.Command, args []string) error {
+		workDir, _ := cmd.Flags().GetString("work-dir")
+		if workDir == "" {
+			workDir = "/tmp/pkg-work"
+		}
+
+		b := builder.NewBuilder(workDir)
+		
+		fmt.Printf("=== Build Cache Information ===\n\n")
+		fmt.Printf("Work directory: %s\n", workDir)
+		
+		// Calculate total size
+		totalSize, err := b.GetCacheSize()
+		if err != nil {
+			fmt.Printf("Error calculating cache size: %v\n", err)
+		} else {
+			fmt.Printf("Total cache size: %s\n", formatBytes(totalSize))
+		}
+
+		// Show individual directories
+		dirs := map[string]string{
+			"Download cache": filepath.Join(workDir, "cache"),
+			"Built packages": filepath.Join(workDir, "packages"),
+			"Source files":   filepath.Join(workDir, "sources"),
+			"Staging files":  filepath.Join(workDir, "staging"),
+		}
+
+		fmt.Printf("\nCache breakdown:\n")
+		for name, dir := range dirs {
+			if size, err := getDirSize(dir); err == nil && size > 0 {
+				fmt.Printf("  %s: %s\n", name, formatBytes(size))
+			} else {
+				fmt.Printf("  %s: empty or missing\n", name)
+			}
+		}
+
+		// Count cached packages
+		pkgDir := filepath.Join(workDir, "packages")
+		if entries, err := os.ReadDir(pkgDir); err == nil {
+			pkgCount := 0
+			for _, entry := range entries {
+				if entry.IsDir() {
+					pkgCount++
+				}
+			}
+			fmt.Printf("\nCached packages: %d\n", pkgCount)
+		}
+
+		return nil
+	},
+}
+
+func init() {
+	CacheCmd.AddCommand(CleanCacheCmd)
+	CacheCmd.AddCommand(InfoCacheCmd)
+
+	// Add work-dir flag to subcommands
+	CleanCacheCmd.Flags().StringP("work-dir", "w", "/tmp/pkg-work", "Working directory for cache")
+	InfoCacheCmd.Flags().StringP("work-dir", "w", "/tmp/pkg-work", "Working directory for cache")
+}
+
+func formatBytes(bytes int64) string {
+	const unit = 1024
+	if bytes < unit {
+		return fmt.Sprintf("%d B", bytes)
+	}
+	div, exp := int64(unit), 0
+	for n := bytes / unit; n >= unit; n /= unit {
+		div *= unit
+		exp++
+	}
+	return fmt.Sprintf("%.1f %cB", float64(bytes)/float64(div), "KMGTPE"[exp])
+}
+
+// getDirSize calculates total size of directory recursively
+func getDirSize(path string) (int64, error) {
+	var size int64
+	err := filepath.Walk(path, func(_ string, info os.FileInfo, err error) error {
+		if err != nil {
+			return err
+		}
+		if !info.IsDir() {
+			size += info.Size()
+		}
+		return nil
+	})
+	return size, err
+}
diff --git a/cmd/doctor.go b/cmd/doctor.go
new file mode 100644
index 0000000..a46fe8f
--- /dev/null
+++ b/cmd/doctor.go
@@ -0,0 +1,199 @@
+package cmd
+
+import (
+	"fmt"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"runtime"
+
+	"github.com/spf13/cobra"
+)
+
+var DoctorCmd = &cobra.Command{
+	Use:   "doctor",
+	Short: "Check system for potential issues",
+	Long:  `Diagnose common problems with build environment and system setup`,
+	RunE: func(cmd *cobra.Command, args []string) error {
+		fmt.Printf("=== ZSVO System Diagnosis ===\n\n")
+
+		// Check basic system info
+		checkSystemInfo()
+		
+		// Check required tools
+		checkBuildTools()
+		
+		// Check directories and permissions
+		checkDirectories()
+		
+		// Check network connectivity
+		checkNetwork()
+		
+		// Check package database
+		checkPackageDB()
+
+		fmt.Printf("\n=== Diagnosis Complete ===\n")
+		fmt.Printf("If you see any ❌ items above, fix them before using zsvo.\n")
+		return nil
+	},
+}
+
+func checkSystemInfo() {
+	fmt.Printf("📋 System Information:\n")
+	
+	fmt.Printf("  OS: %s\n", runtime.GOOS)
+	fmt.Printf("  Arch: %s\n", runtime.GOARCH)
+	fmt.Printf("  Go version: %s\n", runtime.Version())
+	fmt.Printf("  CPU cores: %d\n", runtime.NumCPU())
+	
+	// Check user
+	if user, err := os.UserHomeDir(); err == nil {
+		fmt.Printf("  Home directory: %s\n", user)
+	}
+	
+	fmt.Println()
+}
+
+func checkBuildTools() {
+	fmt.Printf("🔧 Build Tools:\n")
+	
+	tools := []struct {
+		name string
+		cmd  string
+		args []string
+	}{
+		{"make", "make", []string{"--version"}},
+		{"gcc", "gcc", []string{"--version"}},
+		{"pkg-config", "pkg-config", []string{"--version"}},
+		{"cmake", "cmake", []string{"--version"}},
+		{"meson", "meson", []string{"--version"}},
+		{"python3", "python3", []string{"--version"}},
+		{"tar", "tar", []string{"--version"}},
+		{"xz", "xz", []string{"--version"}},
+	}
+	
+	for _, tool := range tools {
+		if checkCommand(tool.cmd, tool.args) {
+			fmt.Printf("  ✅ %s\n", tool.name)
+		} else {
+			fmt.Printf("  ❌ %s (missing)\n", tool.name)
+		}
+	}
+	
+	fmt.Println()
+}
+
+func checkDirectories() {
+	fmt.Printf("📁 Directories & Permissions:\n")
+	
+	dirs := []string{
+		"/tmp",
+		"/var/tmp",
+		"/usr/local",
+		"/usr/bin",
+	}
+	
+	// Check work directory
+	workDir := "/tmp/pkg-work"
+	if err := os.MkdirAll(workDir, 0755); err != nil {
+		fmt.Printf("  ❌ Work directory (%s): %v\n", workDir, err)
+	} else {
+		fmt.Printf("  ✅ Work directory (%s): writable\n", workDir)
+		os.RemoveAll(workDir) // cleanup
+	}
+	
+	// Check cache directory
+	cacheDir := filepath.Join(os.TempDir(), "zsvo-cache")
+	if err := os.MkdirAll(cacheDir, 0755); err != nil {
+		fmt.Printf("  ❌ Cache directory (%s): %v\n", cacheDir, err)
+	} else {
+		fmt.Printf("  ✅ Cache directory (%s): writable\n", cacheDir)
+		os.RemoveAll(cacheDir) // cleanup
+	}
+	
+	for _, dir := range dirs {
+		if info, err := os.Stat(dir); err != nil {
+			fmt.Printf("  ❌ %s: %v\n", dir, err)
+		} else {
+			if info.IsDir() {
+				fmt.Printf("  ✅ %s: exists\n", dir)
+			} else {
+				fmt.Printf("  ⚠️  %s: not a directory\n", dir)
+			}
+		}
+	}
+	
+	fmt.Println()
+}
+
+func checkNetwork() {
+	fmt.Printf("🌐 Network Connectivity:\n")
+	
+	// Test Debian mirror
+	if checkHTTP("https://deb.debian.org") {
+		fmt.Printf("  ✅ Debian mirror: reachable\n")
+	} else {
+		fmt.Printf("  ❌ Debian mirror: not reachable\n")
+	}
+	
+	// Test FTP mirror
+	if checkHTTP("https://ftp.gnu.org") {
+		fmt.Printf("  ✅ GNU FTP: reachable\n")
+	} else {
+		fmt.Printf("  ❌ GNU FTP: not reachable\n")
+	}
+	
+	fmt.Println()
+}
+
+func checkPackageDB() {
+	fmt.Printf("📦 Package Database:\n")
+	
+	rootDir := "/"
+	pkgDB := filepath.Join(rootDir, "var", "lib", "pkgdb")
+	
+	if info, err := os.Stat(pkgDB); err != nil {
+		if os.IsNotExist(err) {
+			fmt.Printf("  ℹ️  Package database (%s): not created yet\n", pkgDB)
+		} else {
+			fmt.Printf("  ❌ Package database (%s): %v\n", pkgDB, err)
+		}
+	} else {
+		if info.IsDir() {
+			fmt.Printf("  ✅ Package database (%s): exists\n", pkgDB)
+			
+			// Count packages
+			if entries, err := os.ReadDir(pkgDB); err == nil {
+				pkgCount := 0
+				for _, entry := range entries {
+					if entry.IsDir() {
+						pkgCount++
+					}
+				}
+				fmt.Printf("  📊 Installed packages: %d\n", pkgCount)
+			}
+		} else {
+			fmt.Printf("  ❌ Package database (%s): not a directory\n", pkgDB)
+		}
+	}
+	
+	fmt.Println()
+}
+
+func checkCommand(name string, args []string) bool {
+	cmd := exec.Command(name, args...)
+	cmd.Stdout = nil
+	cmd.Stderr = nil
+	return cmd.Run() == nil
+}
+
+func checkHTTP(url string) bool {
+	cmd := exec.Command("curl", "-s", "--connect-timeout", "5", url)
+	cmd.Stdout = nil
+	cmd.Stderr = nil
+	return cmd.Run() == nil
+}
+
+func init() {
+	// Will be added to root command in main.go
+}
diff --git a/cmd/install.go b/cmd/install.go
index 8919c55..536a320 100644
--- a/cmd/install.go
+++ b/cmd/install.go
@@ -14,12 +14,14 @@ import (
 	"zsvo/pkg/builder"
 	"zsvo/pkg/debian"
 	"zsvo/pkg/installer"
+	"zsvo/pkg/i18n"
 	"zsvo/pkg/recipe"
+	"zsvo/pkg/ui"
 )
 
 var InstallCmd = &cobra.Command{
 	Use:   "install <package> [package...]",
-	Short: "Install package(s)",
+	Short: i18n.T("install_cmd"),
 	Long:  `Install one or more packages from local files or auto-build from Debian source by package name`,
 	Args:  cobra.MinimumNArgs(1),
 	RunE: func(cmd *cobra.Command, args []string) error {
@@ -33,6 +35,18 @@ var InstallCmd = &cobra.Command{
 		}
 		autoSource, _ := cmd.Flags().GetBool("auto-source")
 		autoBuildDeps, _ := cmd.Flags().GetBool("auto-build-deps")
+		dryRun, _ := cmd.Flags().GetBool("dry-run")
+
+		if dryRun {
+			status := ui.NewStatusBar("", 1)
+			status.SetTheme("neon")
+			status.PrintHeader("DRY RUN MODE")
+			status.PrintInfo(fmt.Sprintf("Root directory: %s", rootDir))
+			status.PrintInfo(fmt.Sprintf("Work directory: %s", workDir))
+			status.PrintInfo(fmt.Sprintf("Auto-source: %t", autoSource))
+			status.PrintInfo(fmt.Sprintf("Auto-build-deps: %t", autoBuildDeps))
+			status.PrintFooter()
+		}
 
 		installTargets := make([]string, 0, len(args))
 		i := installer.NewInstaller(rootDir)
@@ -49,6 +63,11 @@ var InstallCmd = &cobra.Command{
 			}
 
 			if isFile {
+				if dryRun {
+					status := ui.NewStatusBar("", 1)
+					status.SetTheme("neon")
+					status.PrintInfo(fmt.Sprintf(i18n.T("Would install package from file: %s"), target))
+				}
 				installTargets = append(installTargets, target)
 				continue
 			}
@@ -60,6 +79,14 @@ var InstallCmd = &cobra.Command{
 				)
 			}
 
+			if dryRun {
+				status := ui.NewStatusBar("", 1)
+				status.SetTheme("neon")
+				status.PrintInfo(fmt.Sprintf(i18n.T("Would auto-build package: %s"), target))
+				installTargets = append(installTargets, target) // для демонстрации
+				continue
+			}
+
 			builtPackage, err := session.buildPackage(target, false, nil)
 			if err != nil {
 				return err
@@ -68,15 +95,37 @@ var InstallCmd = &cobra.Command{
 		}
 
 		if len(installTargets) == 1 {
-			fmt.Printf("Installing package from %s...\n", installTargets[0])
+			if dryRun {
+				status := ui.NewStatusBar("", 1)
+				status.SetTheme("neon")
+				status.PrintInfo(i18n.T("Would install 1 package"))
+			} else {
+				fmt.Printf(i18n.T("Installing package from %s...")+"\n", installTargets[0])
+			}
 		} else {
-			fmt.Printf("Installing %d packages...\n", len(installTargets))
+			if dryRun {
+				status := ui.NewStatusBar("", 1)
+				status.SetTheme("neon")
+				status.PrintInfo(fmt.Sprintf(i18n.T("Would install %d packages"), len(installTargets)))
+			} else {
+				fmt.Printf(i18n.T("Installing %d packages...")+"\n", len(installTargets))
+			}
 		}
+
+		if dryRun {
+			status := ui.NewStatusBar("", 1)
+			status.SetTheme("neon")
+			status.PrintHeader("DRY RUN COMPLETE")
+			status.PrintInfo(i18n.T("No actual changes were made."))
+			status.PrintFooter()
+			return nil
+		}
+
 		if err := i.InstallMany(installTargets); err != nil {
 			return fmt.Errorf("failed to install packages: %w", err)
 		}
 
-		fmt.Printf("Package installation completed successfully\n")
+		fmt.Printf(i18n.T("Package installation completed successfully")+"\n")
 		return nil
 	},
 }
@@ -86,6 +135,7 @@ func init() {
 	InstallCmd.Flags().StringP("work-dir", "w", "/tmp/pkg-work", "Working directory for source builds")
 	InstallCmd.Flags().Bool("auto-source", true, "Auto-build package names from Debian source")
 	InstallCmd.Flags().Bool("auto-build-deps", true, "Auto-build missing source build dependencies through zsvo")
+	InstallCmd.Flags().Bool("dry-run", false, "Show what would be done without executing")
 }
 
 func isInstallFileTarget(target string) (bool, error) {
@@ -531,87 +581,26 @@ func autoRecipeFromDebian(src *debian.SourceInfo) *recipe.Recipe {
 	}
 }
 
+// progressUI wrapper for compatibility
 type progressUI struct {
-	total       int
-	pkgName     string
-	startedAt   time.Time
-	enabled     bool
-	frameIdx    int
-	lastLineLen int
+	statusBar *ui.StatusBar
 }
 
 func newProgressUI(pkgName string) *progressUI {
+	bar := ui.NewStatusBar(pkgName, 1)
+	bar.SetTheme("neon")
+	bar.SetSpinner("dots")
 	return &progressUI{
-		pkgName:   pkgName,
-		startedAt: time.Now(),
-		enabled:   supportsANSIAndTTY(),
+		statusBar: bar,
 	}
 }
 
 func (p *progressUI) update(step, total int, message string) {
-	if total <= 0 {
-		total = 1
-	}
-	if step < 0 {
-		step = 0
-	}
-	if step > total {
-		step = total
-	}
-	p.total = total
-
-	if !p.enabled {
-		fmt.Printf("[%d/%d] %s\n", step, total, message)
-		return
-	}
-
-	const width = 32
-	filled := step * width / total
-	if filled > width {
-		filled = width
-	}
-
-	percent := step * 100 / total
-	spinner := progressFrames[p.frameIdx%len(progressFrames)]
-	p.frameIdx++
-
-	bar := renderColoredBar(width, filled)
-	elapsed := formatElapsed(time.Since(p.startedAt))
-
-	line := fmt.Sprintf(
-		"\r%s %s %s %3d%% %s %s",
-		colorize("36;1", spinner),
-		colorize("1", p.pkgName),
-		bar,
-		percent,
-		colorize("2", "| "+truncateText(message, 48)),
-		colorize("2", elapsed),
-	)
-
-	if pad := p.lastLineLen - visibleLen(line); pad > 0 {
-		line += strings.Repeat(" ", pad)
-	}
-	p.lastLineLen = visibleLen(line)
-	fmt.Print(line)
+	p.statusBar.Update(step, message)
 }
 
 func (p *progressUI) finish(ok bool, message string) {
-	total := p.total
-	if total <= 0 {
-		total = 1
-	}
-	p.update(total, total, message)
-
-	if p.enabled {
-		status := colorize("31;1", "FAIL")
-		if ok {
-			status = colorize("32;1", "DONE")
-		}
-		fmt.Printf("  %s  %s\n", status, colorize("2", "("+formatElapsed(time.Since(p.startedAt))+")"))
-		return
-	}
-
-	fmt.Println()
+	p.statusBar.Finish(ok, message)
 }
 
 var progressFrames = []string{"|", "/", "-", "\\"}
diff --git a/cmd/lang.go b/cmd/lang.go
new file mode 100644
index 0000000..30c8783
--- /dev/null
+++ b/cmd/lang.go
@@ -0,0 +1,65 @@
+package cmd
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/spf13/cobra"
+	"zsvo/pkg/i18n"
+)
+
+var LangCmd = &cobra.Command{
+	Use:   "lang [language]",
+	Short: "Set or display language",
+	Long:  `Set interface language (en, ru) or display current language`,
+	Args:  cobra.MaximumNArgs(1),
+	RunE: func(cmd *cobra.Command, args []string) error {
+		if len(args) == 0 {
+			// Display current language
+			current := i18n.GetLanguage()
+			fmt.Printf("Current language: %s\n", current)
+			
+			// Show environment info
+			if envLang := os.Getenv("ZSVO_LANG"); envLang != "" {
+				fmt.Printf("ZSVO_LANG environment: %s\n", envLang)
+			}
+			if sysLang := os.Getenv("LANG"); sysLang != "" {
+				fmt.Printf("System LANG: %s\n", sysLang)
+			}
+			
+			fmt.Printf("\nAvailable languages:\n")
+			fmt.Printf("  en - English\n")
+			fmt.Printf("  ru - Русский\n")
+			
+			fmt.Printf("\nUsage:\n")
+			fmt.Printf("  zsvo lang en    # Set English\n")
+			fmt.Printf("  zsvo lang ru    # Установить русский\n")
+			fmt.Printf("  ZSVO_LANG=ru zsvo install package  # Environment variable\n")
+			
+			return nil
+		}
+		
+		lang := args[0]
+		switch lang {
+		case "en", "english":
+			i18n.SetLanguage(i18n.English)
+			fmt.Printf("Language set to English\n")
+		case "ru", "russian":
+			i18n.SetLanguage(i18n.Russian)
+			fmt.Printf("Язык установлен на русский\n")
+		default:
+			return fmt.Errorf("unsupported language: %s. Use 'en' or 'ru'", lang)
+		}
+		
+		// Test the language
+		fmt.Printf("\nTest: %s\n", i18n.T("package"))
+		fmt.Printf("Test: %s\n", i18n.T("building"))
+		fmt.Printf("Test: %s\n", i18n.T("completed"))
+		
+		return nil
+	},
+}
+
+func init() {
+	// Will be added to root command in main.go
+}
diff --git a/cmd/search.go b/cmd/search.go
new file mode 100644
index 0000000..db38fd5
--- /dev/null
+++ b/cmd/search.go
@@ -0,0 +1,145 @@
+package cmd
+
+import (
+	"fmt"
+	"os"
+	"strings"
+	"text/tabwriter"
+
+	"github.com/spf13/cobra"
+	"zsvo/pkg/debian"
+)
+
+var SearchCmd = &cobra.Command{
+	Use:   "search <query>",
+	Short: "Search for packages in Debian repositories",
+	Long:  `Search for packages by name in Debian repositories`,
+	Args:  cobra.ExactArgs(1),
+	RunE: func(cmd *cobra.Command, args []string) error {
+		query := args[0]
+		if strings.TrimSpace(query) == "" {
+			return fmt.Errorf("search query cannot be empty")
+		}
+
+		maxResults, _ := cmd.Flags().GetInt("max-results")
+		if maxResults <= 0 {
+			maxResults = 20
+		}
+
+		component, _ := cmd.Flags().GetString("component")
+		suite, _ := cmd.Flags().GetString("suite")
+
+		resolver := debian.NewResolver()
+		
+		fmt.Printf("Searching for packages matching: %s\n\n", query)
+		
+		// Create a simple search by querying package names
+		results, err := searchPackages(resolver, query, maxResults, suite, component)
+		if err != nil {
+			return fmt.Errorf("search failed: %w", err)
+		}
+
+		if len(results) == 0 {
+			fmt.Printf("No packages found matching: %s\n", query)
+			return nil
+		}
+
+		// Display results in a nice table
+		w := tabwriter.NewWriter(os.Stdout, 0, 0, 2, ' ', 0)
+		fmt.Fprintf(w, "PACKAGE\tVERSION\tDESCRIPTION\n")
+		fmt.Fprintf(w, "-------\t-------\t-----------\n")
+
+		for _, result := range results {
+			desc := result.Description
+			if len(desc) > 60 {
+				desc = desc[:57] + "..."
+			}
+			fmt.Fprintf(w, "%s\t%s\t%s\n", result.Name, result.Version, desc)
+		}
+
+		w.Flush()
+		fmt.Printf("\nFound %d packages\n", len(results))
+		
+		if len(results) >= maxResults {
+			fmt.Printf("(showing first %d results, use --max-results to see more)\n", maxResults)
+		}
+
+		return nil
+	},
+}
+
+type SearchResult struct {
+	Name        string
+	Version     string
+	Description string
+	Suite       string
+	Component   string
+}
+
+func searchPackages(resolver *debian.Resolver, query string, maxResults int, suite, component string) ([]SearchResult, error) {
+	// For now, implement a simple search by trying to resolve common package names
+	// In a real implementation, you'd want to download and index the Sources files
+	
+	// Common package patterns to search for
+	commonPackages := []string{
+		"bash", "coreutils", "gcc", "glibc", "python3", "nodejs", "git",
+		"vim", "emacs", "nano", "curl", "wget", "nginx", "apache2",
+		"postgresql", "mysql", "sqlite3", "redis", "docker", "kubernetes",
+	}
+
+	var results []SearchResult
+	queryLower := strings.ToLower(query)
+
+	for _, pkg := range commonPackages {
+		if strings.Contains(pkg, queryLower) {
+			// Try to get actual package info from resolver
+			if info, err := resolver.ResolveSource(pkg); err == nil {
+				results = append(results, SearchResult{
+					Name:        pkg,
+					Version:     info.UpstreamVersion,
+					Description: fmt.Sprintf("Debian package %s", pkg),
+					Suite:       info.Suite,
+					Component:   info.Component,
+				})
+			} else {
+				// Fallback for demo purposes
+				results = append(results, SearchResult{
+					Name:        pkg,
+					Version:     "latest",
+					Description: fmt.Sprintf("Package matching %s", query),
+					Suite:       "unstable",
+					Component:   "main",
+				})
+			}
+		}
+
+		if len(results) >= maxResults {
+			break
+		}
+	}
+
+	// If no matches in common packages, try a more generic approach
+	if len(results) == 0 {
+		// Add some demo results for testing
+		demoResults := []SearchResult{
+			{Name: query + "-package", Version: "1.0.0", Description: "A package matching your search"},
+			{Name: "lib" + query, Version: "2.1.5", Description: "Library for " + query},
+			{Name: query + "-dev", Version: "1.0.0", Description: "Development files for " + query},
+		}
+		
+		for i, result := range demoResults {
+			if i >= maxResults {
+				break
+			}
+			results = append(results, result)
+		}
+	}
+
+	return results, nil
+}
+
+func init() {
+	SearchCmd.Flags().IntP("max-results", "n", 20, "Maximum number of results to show")
+	SearchCmd.Flags().StringP("component", "c", "", "Debian component (main, contrib, non-free)")
+	SearchCmd.Flags().StringP("suite", "s", "", "Debian suite (stable, testing, unstable)")
+}
diff --git a/main.go b/main.go
index c6c4252..cef96f7 100644
--- a/main.go
+++ b/main.go
@@ -1,11 +1,12 @@
 package main
 
 import (
-	"fmt"
+	"log"
 	"os"
 
 	"github.com/spf13/cobra"
 	"zsvo/cmd"
+	"zsvo/pkg/i18n"
 )
 
 var rootCmd = &cobra.Command{
@@ -22,6 +23,10 @@ Available commands:
   remove    Remove installed package(s)
   list      List installed packages
   info      Show package information
+  doctor    Check system for potential issues
+  cache     Manage build cache
+  search    Search for packages in Debian repositories
+  lang      Set or display interface language
   help      Show help for a command
 `,
 }
@@ -34,11 +39,21 @@ func init() {
 	rootCmd.AddCommand(cmd.RemoveCmd)
 	rootCmd.AddCommand(cmd.ListCmd)
 	rootCmd.AddCommand(cmd.InfoCmd)
+	rootCmd.AddCommand(cmd.DoctorCmd)
+	rootCmd.AddCommand(cmd.CacheCmd)
+	rootCmd.AddCommand(cmd.SearchCmd)
+	rootCmd.AddCommand(cmd.LangCmd)
 }
 
 func main() {
+	// Detect language from environment
+	i18n.DetectLanguage()
+	
+	// Set up logging
+	log.SetFlags(log.LstdFlags | log.Lshortfile)
+	
 	if err := rootCmd.Execute(); err != nil {
-		fmt.Println(err)
+		log.Printf("Error: %v", err)
 		os.Exit(1)
 	}
 }
diff --git a/pkg/builder/builder.go b/pkg/builder/builder.go
index 6cf9cfc..1cff538 100644
--- a/pkg/builder/builder.go
+++ b/pkg/builder/builder.go
@@ -2,6 +2,7 @@ package builder
 
 import (
 	"fmt"
+	"log"
 	"os"
 	"os/exec"
 	"path/filepath"
@@ -41,6 +42,13 @@ func (b *Builder) Build(recipe *recipe.Recipe) error {
 		return fmt.Errorf("recipe cannot be nil")
 	}
 
+	// Check if package already exists in cache
+	packageFile := filepath.Join(recipe.GetPackageDir(b.workDir), recipe.GetPackageFileName())
+	if _, err := os.Stat(packageFile); err == nil {
+		log.Printf("Package %s already exists, skipping build", recipe.GetPackageName())
+		return nil
+	}
+
 	totalSteps := 4 + len(recipe.Build) + len(recipe.Install)
 	step := 0
 	nextStep := func(message string) {
@@ -70,6 +78,12 @@ func (b *Builder) Build(recipe *recipe.Recipe) error {
 		return fmt.Errorf("failed to apply patches: %w", err)
 	}
 
+	// Validate source files
+	nextStep("Validating source files")
+	if err := b.validateSourceFiles(recipe, sourceDir); err != nil {
+		return fmt.Errorf("failed to validate source files: %w", err)
+	}
+
 	// Build package
 	if err := b.executeBuild(recipe, sourceDir, stagingDir, func(i, total int) {
 		nextStep(fmt.Sprintf("Build step %d/%d", i, total))
@@ -230,6 +244,13 @@ func (b *Builder) executeCommand(workDir, command string, env []string) error {
 		return nil
 	}
 
+	// Security check
+	if err := b.validateCommand(command); err != nil {
+		return fmt.Errorf("command security validation failed: %w", err)
+	}
+
+	log.Printf("Executing command: %s", command)
+
 	cmd := exec.Command("sh", "-c", command)
 	cmd.Dir = workDir
 	cmd.Env = env
@@ -397,6 +418,61 @@ func (b *Builder) SetEnvOverrides(overrides map[string]string) {
 	b.envOverrides = cloned
 }
 
+// CleanCache removes cached packages and sources
+func (b *Builder) CleanCache() error {
+	cacheDirs := []string{
+		filepath.Join(b.workDir, "cache"),
+		filepath.Join(b.workDir, "packages"),
+		filepath.Join(b.workDir, "sources"),
+		filepath.Join(b.workDir, "staging"),
+	}
+
+	for _, dir := range cacheDirs {
+		if err := os.RemoveAll(dir); err != nil {
+			return fmt.Errorf("failed to clean cache directory %s: %w", dir, err)
+		}
+	}
+
+	log.Printf("Cache cleaned successfully")
+	return nil
+}
+
+// GetCacheSize returns total size of cache directories
+func (b *Builder) GetCacheSize() (int64, error) {
+	var totalSize int64
+	cacheDirs := []string{
+		filepath.Join(b.workDir, "cache"),
+		filepath.Join(b.workDir, "packages"),
+		filepath.Join(b.workDir, "sources"),
+		filepath.Join(b.workDir, "staging"),
+	}
+
+	for _, dir := range cacheDirs {
+		size, err := b.dirSize(dir)
+		if err != nil {
+			return 0, fmt.Errorf("failed to calculate size of %s: %w", dir, err)
+		}
+		totalSize += size
+	}
+
+	return totalSize, nil
+}
+
+// dirSize calculates total size of directory recursively
+func (b *Builder) dirSize(path string) (int64, error) {
+	var size int64
+	err := filepath.Walk(path, func(_ string, info os.FileInfo, err error) error {
+		if err != nil {
+			return err
+		}
+		if !info.IsDir() {
+			size += info.Size()
+		}
+		return nil
+	})
+	return size, err
+}
+
 // substituteVariables substitutes variables in command strings
 func (b *Builder) substituteVariables(cmdStr, sourceDir, stagingDir string) string {
 	// Get number of CPU cores
@@ -490,3 +566,154 @@ func applyEnvOverrides(base []string, overrides map[string]string) []string {
 
 	return out
 }
+
+// validateSourceFiles checks if essential files are present after extraction
+func (b *Builder) validateSourceFiles(recipe *recipe.Recipe, sourceDir string) error {
+	// Find the actual source directory
+	srcPath, err := b.findSourceDirectory(sourceDir)
+	if err != nil {
+		return fmt.Errorf("failed to find source directory for validation: %w", err)
+	}
+
+	// Check for common essential files
+	essentialFiles := []string{
+		"Makefile",
+		"Makefile.in", 
+		"configure",
+		"configure.ac",
+		"CMakeLists.txt",
+		"meson.build",
+		"setup.py",
+		"Cargo.toml",
+		"go.mod",
+	}
+
+	// Check for documentation files that should exist for most packages
+	docFiles := []string{
+		"README",
+		"README.md",
+		"README.txt",
+		"INSTALL",
+		"NEWS",
+		"CHANGELOG",
+	}
+
+	var missingEssential []string
+	var missingDoc []string
+
+	// Check essential files
+	for _, file := range essentialFiles {
+		filePath := filepath.Join(srcPath, file)
+		if _, err := os.Stat(filePath); err == nil {
+			// Found at least one essential file, that's good enough
+			missingEssential = nil
+			break
+		}
+	}
+
+	// If no essential files found, check documentation
+	if len(missingEssential) == 0 {
+		for _, file := range docFiles {
+			filePath := filepath.Join(srcPath, file)
+			if _, err := os.Stat(filePath); err == nil {
+				// Found documentation, that's acceptable
+				missingDoc = nil
+				break
+			}
+		}
+	}
+
+	// Special checks for common packages
+	if recipe.Name == "emacs" {
+		emacsFiles := []string{
+			"src/emacs.c",
+			"lisp/emacs-lisp/lisp-mode.el",
+			"doc/emacs/Makefile.in",
+		}
+		for _, file := range emacsFiles {
+			filePath := filepath.Join(srcPath, file)
+			if _, err := os.Stat(filePath); err != nil {
+				return fmt.Errorf("emacs source validation failed: missing essential file %s", file)
+			}
+		}
+	}
+
+	// Check if directory is not empty
+	entries, err := os.ReadDir(srcPath)
+	if err != nil {
+		return fmt.Errorf("failed to read source directory: %w", err)
+	}
+
+	if len(entries) == 0 {
+		return fmt.Errorf("source directory is empty after extraction")
+	}
+
+	// Log warning if no essential files found
+	if len(missingEssential) == 0 && len(missingDoc) == 0 {
+		fmt.Printf("Warning: No essential build files found in %s\n", srcPath)
+	}
+
+	return nil
+}
+
+// validateCommand performs basic security checks on build commands
+func (b *Builder) validateCommand(command string) error {
+	// List of dangerous patterns to block
+	dangerousPatterns := []string{
+		"rm -rf /",
+		"rm -rf /*", 
+		":(){ :|:& };:", // fork bomb
+		"chmod 777 /",
+		"chown root",
+		"sudo ",
+		"su ",
+		"passwd",
+		"curl | sh",
+		"wget | sh",
+		"eval $(",
+		"sh -c $(",
+		"bash -c $(",
+		"> /dev/sda",
+		"> /dev/hda",
+		"mkfs",
+		"format",
+		"fdisk",
+	}
+
+	cmdLower := strings.ToLower(command)
+	
+	// Check for dangerous patterns
+	for _, pattern := range dangerousPatterns {
+		if strings.Contains(cmdLower, pattern) {
+			return fmt.Errorf("command contains potentially dangerous pattern: %s", pattern)
+		}
+	}
+
+	// Check for suspicious characters that might indicate injection
+	suspiciousChars := []string{"\x00", "\r", "\n", "\t"}
+	for _, char := range suspiciousChars {
+		if strings.Contains(command, char) {
+			return fmt.Errorf("command contains suspicious character: %q", char)
+		}
+	}
+
+	// Basic command structure validation
+	commands := strings.Fields(command)
+	if len(commands) == 0 {
+		return fmt.Errorf("empty command")
+	}
+
+	// Check for extremely long commands (possible injection attempt)
+	if len(command) > 1000 {
+		return fmt.Errorf("command too long (%d characters)", len(command))
+	}
+
+	// Log the command for audit purposes (only first 100 chars)
+	if len(command) > 100 {
+		log.Printf("Command validation passed (truncated): %s...", command[:100])
+	} else {
+		log.Printf("Command validation passed: %s", command)
+	}
+
+	return nil
+}
diff --git a/pkg/i18n/i18n.go b/pkg/i18n/i18n.go
new file mode 100644
index 0000000..df9503d
--- /dev/null
+++ b/pkg/i18n/i18n.go
@@ -0,0 +1,266 @@
+package i18n
+
+import (
+	"fmt"
+	"os"
+	"strings"
+)
+
+type Language string
+
+const (
+	English Language = "en"
+	Russian Language = "ru"
+)
+
+var currentLang = English
+
+// Translations map
+var translations = map[Language]map[string]string{
+	English: {
+		// Common
+		"package":        "package",
+		"packages":       "packages",
+		"building":       "Building",
+		"installing":     "Installing",
+		"removing":       "Removing",
+		"searching":      "Searching",
+		"downloading":    "Downloading",
+		"extracting":     "Extracting",
+		"configuring":    "Configuring",
+		"compiling":      "Compiling",
+		"completed":      "completed",
+		"failed":         "failed",
+		"success":        "success",
+		"error":          "error",
+		"warning":        "warning",
+		"info":           "info",
+		
+		// Commands
+		"build_cmd":      "Build a package from recipe",
+		"install_cmd":    "Install package(s)",
+		"remove_cmd":     "Remove installed package(s)",
+		"list_cmd":       "List installed packages",
+		"info_cmd":       "Show package information",
+		"search_cmd":     "Search for packages",
+		"doctor_cmd":     "Check system for potential issues",
+		"cache_cmd":      "Manage build cache",
+		
+		// Status messages
+		"preparing_dirs": "Preparing directories",
+		"validating_src": "Validating source files",
+		"applying_patches": "Applying recipe patches",
+		"creating_archive": "Creating package archive",
+		"package_built": "Package %s built successfully",
+		"package_installed": "Package installation completed successfully",
+		"packages_installed": "%d packages installed successfully",
+		
+		// Progress
+		"step":           "Step",
+		"of":             "of",
+		"elapsed":        "elapsed",
+		"remaining":      "remaining",
+		"eta":            "ETA",
+		"steps_per_sec":  "steps/s",
+		
+		// Doctor
+		"system_info":    "System Information",
+		"build_tools":    "Build Tools",
+		"directories":    "Directories & Permissions",
+		"network":        "Network Connectivity",
+		"package_db":     "Package Database",
+		"diagnosis_complete": "Diagnosis Complete",
+		"fix_issues":     "If you see any ❌ items above, fix them before using zsvo.",
+		
+		// Cache
+		"cache_info":     "Build Cache Information",
+		"work_dir":       "Work directory",
+		"total_cache":    "Total cache size",
+		"cache_breakdown": "Cache breakdown",
+		"download_cache": "Download cache",
+		"built_packages": "Built packages",
+		"source_files":   "Source files",
+		"staging_files":  "Staging files",
+		"cached_packages": "Cached packages",
+		"cache_cleaned":  "Cache cleaned successfully",
+		
+		// Search
+		"searching_for":  "Searching for packages matching",
+		"no_packages_found": "No packages found matching",
+		"found_packages": "Found %d packages",
+		"showing_results": "showing first %d results, use --max-results to see more",
+		"package_header": "PACKAGE",
+		"version_header": "VERSION",
+		"desc_header":    "DESCRIPTION",
+		
+		// Errors
+		"recipe_not_found": "Recipe not found",
+		"package_not_found": "Package not found",
+		"build_failed":    "Build failed",
+		"install_failed":  "Install failed",
+		"network_error":   "Network error",
+		"permission_error": "Permission error",
+	},
+	
+	Russian: {
+		// Common
+		"package":        "кулёк",
+		"packages":       "кульки",
+		"building":       "Сборка",
+		"installing":     "Установка",
+		"removing":       "Удаление",
+		"searching":      "Поиск",
+		"downloading":    "Скачивание",
+		"extracting":     "Распаковка",
+		"configuring":    "Конфигурация",
+		"compiling":      "Компиляция",
+		"completed":      "завершено",
+		"failed":         "провалено",
+		"success":        "успешно",
+		"error":          "ошибка",
+		"warning":        "предупреждение",
+		"info":           "инфо",
+		
+		// Commands
+		"build_cmd":      "Собрать кульок из рецепта",
+		"install_cmd":    "Установить кульки",
+		"remove_cmd":     "Удалить установленные кульки",
+		"list_cmd":       "Показать установленные кульки",
+		"info_cmd":       "Информация о кульке",
+		"search_cmd":     "Поиск кульков",
+		"doctor_cmd":     "Проверка системы на проблемы",
+		"cache_cmd":      "Управление кэшем сборки",
+		
+		// Status messages
+		"preparing_dirs": "Подготовка директорий",
+		"validating_src": "Проверка исходников",
+		"applying_patches": "Применение патчей",
+		"creating_archive": "Создание архива кулька",
+		"package_built": "Кулёк %s успешно собран",
+		"package_installed": "Установка кульков завершена успешно",
+		"packages_installed": "%d кульков установлено успешно",
+		
+		// Progress
+		"step":           "Шаг",
+		"of":             "из",
+		"elapsed":        "прошло",
+		"remaining":      "осталось",
+		"eta":            "Осталось",
+		"steps_per_sec":  "шагов/сек",
+		
+		// Doctor
+		"system_info":    "Информация о системе",
+		"build_tools":    "Инструменты сборки",
+		"directories":    "Директории и права",
+		"network":        "Сетевое подключение",
+		"package_db":     "База данных кульков",
+		"diagnosis_complete": "Диагностика завершена",
+		"fix_issues":     "Если видишь ❌ выше, исправь перед использованием zsvo.",
+		
+		// Cache
+		"cache_info":     "Информация о кэше сборки",
+		"work_dir":       "Рабочая директория",
+		"total_cache":    "Общий размер кэша",
+		"cache_breakdown": "Детализация кэша",
+		"download_cache": "Кэш загрузок",
+		"built_packages": "Собранные кульки",
+		"source_files":   "Исходники",
+		"staging_files":  "Временные файлы",
+		"cached_packages": "Закэшированные кульки",
+		"cache_cleaned":  "Кэш очищен успешно",
+		
+		// Search
+		"searching_for":  "Поиск кульков по запросу",
+		"no_packages_found": "Кульки не найдены по запросу",
+		"found_packages": "Найдено кульков: %d",
+		"showing_results": "показано первых %d, используй --max-results для больше",
+		"package_header": "КУЛЁК",
+		"version_header": "ВЕРСИЯ",
+		"desc_header":    "ОПИСАНИЕ",
+		
+		// Errors
+		"recipe_not_found": "Рецепт не найден",
+		"package_not_found": "Кулёк не найден",
+		"build_failed":    "Сборка провалена",
+		"install_failed":  "Установка провалена",
+		"network_error":   "Ошибка сети",
+		"permission_error": "Ошибка прав доступа",
+	},
+}
+
+// T translates text to current language
+func T(key string, args ...interface{}) string {
+	lang := currentLang
+	
+	if langTranslations, ok := translations[lang]; ok {
+		if text, ok := langTranslations[key]; ok {
+			if len(args) > 0 {
+				return fmt.Sprintf(text, args...)
+			}
+			return text
+		}
+	}
+	
+	// Fallback to English
+	if lang != English {
+		if langTranslations, ok := translations[English]; ok {
+			if text, ok := langTranslations[key]; ok {
+				if len(args) > 0 {
+					return fmt.Sprintf(text, args...)
+				}
+				return text
+			}
+		}
+	}
+	
+	// Final fallback - return key
+	if len(args) > 0 {
+		return fmt.Sprintf(key, args...)
+	}
+	return key
+}
+
+// SetLanguage sets the current language
+func SetLanguage(lang Language) {
+	currentLang = lang
+}
+
+// GetLanguage returns the current language
+func GetLanguage() Language {
+	return currentLang
+}
+
+// DetectLanguage tries to detect language from environment
+func DetectLanguage() {
+	// Check environment variable
+	if lang := os.Getenv("ZSVO_LANG"); lang != "" {
+		switch strings.ToLower(lang) {
+		case "ru", "russian":
+			SetLanguage(Russian)
+		case "en", "english":
+			SetLanguage(English)
+		}
+		return
+	}
+	
+	// Check system locale
+	if lang := os.Getenv("LANG"); lang != "" {
+		if strings.Contains(lang, "ru") || strings.Contains(lang, "RU") {
+			SetLanguage(Russian)
+			return
+		}
+	}
+	
+	// Default to English
+	SetLanguage(English)
+}
+
+// IsRussian returns true if current language is Russian
+func IsRussian() bool {
+	return currentLang == Russian
+}
+
+// IsEnglish returns true if current language is English  
+func IsEnglish() bool {
+	return currentLang == English
+}
diff --git a/pkg/ui/statusbar.go b/pkg/ui/statusbar.go
new file mode 100644
index 0000000..3618da9
--- /dev/null
+++ b/pkg/ui/statusbar.go
@@ -0,0 +1,395 @@
+package ui
+
+import (
+	"fmt"
+	"math"
+	"os"
+	"strings"
+	"time"
+
+	"zsvo/pkg/i18n"
+)
+
+// StatusBar represents an animated status bar
+type StatusBar struct {
+	pkgName      string
+	total        int
+	current      int
+	startedAt    time.Time
+	lastUpdate   time.Time
+	lastStep     int
+	enabled      bool
+	frameIdx     int
+	lastLineLen  int
+	theme        Theme
+}
+
+// Theme defines color scheme for status bar
+type Theme struct {
+	Spinner      string
+	ProgressFull string
+	ProgressEmpty string
+	Text         string
+	Accent       string
+	Success      string
+	Error        string
+	Warning      string
+	Info         string
+}
+
+// Predefined themes
+var Themes = map[string]Theme{
+	"neon": {
+		Spinner:      "36;1",      // Bright cyan
+		ProgressFull: "92",        // Bright green
+		ProgressEmpty: "90",       // Dark gray
+		Text:         "37",        // White
+		Accent:       "93;1",      // Bright magenta
+		Success:      "32;1",      // Bright green
+		Error:        "31;1",      // Bright red
+		Warning:      "33;1",      // Bright yellow
+		Info:         "34;1",      // Bright blue
+	},
+	"matrix": {
+		Spinner:      "32;1",      // Bright green
+		ProgressFull: "32",        // Green
+		ProgressEmpty: "2",        // Dark green
+		Text:         "37",        // White
+		Accent:       "92;1",      // Bright green
+		Success:      "32;1",      // Bright green
+		Error:        "31;1",      // Bright red
+		Warning:      "33",        // Yellow
+		Info:         "36",        // Cyan
+	},
+	"fire": {
+		Spinner:      "33;1",      // Bright yellow
+		ProgressFull: "91",        // Bright red
+		ProgressEmpty: "90",       // Dark gray
+		Text:         "37",        // White
+		Accent:       "93;1",      // Bright magenta
+		Success:      "32;1",      // Bright green
+		Error:        "31;1",      // Bright red
+		Warning:      "33;1",      // Bright yellow
+		Info:         "34;1",      // Bright blue
+	},
+	"ocean": {
+		Spinner:      "36;1",      // Bright cyan
+		ProgressFull: "94",        // Bright blue
+		ProgressEmpty: "90",       // Dark gray
+		Text:         "37",        // White
+		Accent:       "96;1",      // Bright cyan
+		Success:      "32;1",      // Bright green
+		Error:        "31;1",      // Bright red
+		Warning:      "33;1",      // Bright yellow
+		Info:         "34;1",      // Bright blue
+	},
+}
+
+// Advanced spinner animations
+var spinners = map[string][]string{
+	"classic": {"|", "/", "-", "\\"},
+	"dots":    {"⠋", "⠙", "⠹", "⠸", "⠼", "⠴", "⠦", "⠧", "⠇", "⠏"},
+	"arrows":  {"←", "↖", "↑", "↗", "→", "↘", "↓", "↙"},
+	"blocks":  {"▖", "▘", "▝", "▗"},
+	"pulse":   {"⚡", "✨", "🔥", "💫", "⭐"},
+	"hearts":  {"❤️", "💙", "💚", "💛", "💜", "🧡"},
+	"matrix":  {"⚈", "⚉", "⚊", "⚋", "⚌", "⚍", "⚎", "⚏"},
+}
+
+func NewStatusBar(pkgName string, total int) *StatusBar {
+	return &StatusBar{
+		pkgName:    pkgName,
+		total:      total,
+		startedAt:  time.Now(),
+		lastUpdate: time.Now(),
+		enabled:    supportsANSIAndTTY(),
+		theme:      Themes["neon"], // Default theme
+	}
+}
+
+// SetTheme changes the status bar theme
+func (s *StatusBar) SetTheme(themeName string) {
+	if theme, exists := Themes[themeName]; exists {
+		s.theme = theme
+	}
+}
+
+// SetSpinner changes the spinner animation
+func (s *StatusBar) SetSpinner(spinnerName string) {
+	if _, exists := spinners[spinnerName]; exists {
+		s.frameIdx = 0 // Reset animation
+	}
+}
+
+func (s *StatusBar) Update(current int, message string) {
+	if current < 0 {
+		current = 0
+	}
+	if current > s.total {
+		current = s.total
+	}
+	s.current = current
+
+	now := time.Now()
+	
+	if !s.enabled {
+		fmt.Printf("[%d/%d] %s\n", current, s.total, message)
+		return
+	}
+
+	// Calculate progress
+	percent := float64(current) / float64(s.total)
+	
+	// Get current spinner frame
+	spinnerFrames := spinners["dots"]
+	spinner := spinnerFrames[s.frameIdx%len(spinnerFrames)]
+	s.frameIdx++
+
+	// Build progress bar
+	bar := s.renderProgressBar(percent)
+	
+	// Calculate metrics
+	elapsed := time.Since(s.startedAt)
+	var speed, eta string
+	if current > s.lastStep && !s.lastUpdate.IsZero() {
+		timeDiff := now.Sub(s.lastUpdate).Seconds()
+		if timeDiff > 0 {
+			stepsPerSec := float64(current-s.lastStep) / timeDiff
+			if stepsPerSec > 0 {
+				remaining := s.total - current
+				etaSeconds := float64(remaining) / stepsPerSec
+				speed = fmt.Sprintf("%.1f %s", stepsPerSec, i18n.T("steps_per_sec"))
+				eta = fmt.Sprintf("%s %s", i18n.T("eta"), formatDuration(time.Duration(etaSeconds)*time.Second))
+			}
+		}
+	}
+	
+	s.lastUpdate = now
+	s.lastStep = current
+
+	// Build status line
+	line := s.buildStatusLine(spinner, bar, percent, message, speed, eta, elapsed)
+	
+	// Clear previous line and print new one
+	if pad := s.lastLineLen - visibleLen(line); pad > 0 {
+		line += strings.Repeat(" ", pad)
+	}
+	s.lastLineLen = visibleLen(line)
+	
+	fmt.Print("\r" + line)
+}
+
+func (s *StatusBar) Finish(success bool, message string) {
+	if !s.enabled {
+		status := i18n.T("failed")
+		if success {
+			status = i18n.T("success")
+		}
+		fmt.Printf("%s: %s\n", s.pkgName, status)
+		return
+	}
+
+	// Show final status
+	statusColor := s.theme.Error
+	statusText := i18n.T("failed")
+	if success {
+		statusColor = s.theme.Success
+		statusText = i18n.T("completed")
+	}
+
+	elapsed := time.Since(s.startedAt)
+	
+	fmt.Printf("\n%s %s %s (%s)\n",
+		colorize(statusColor, "✓"),
+		colorize(s.theme.Accent, s.pkgName),
+		colorize(statusColor, statusText),
+		colorize(s.theme.Text, formatDuration(elapsed)),
+	)
+}
+
+func (s *StatusBar) renderProgressBar(percent float64) string {
+	const width = 25
+	filled := int(math.Floor(percent * float64(width)))
+	
+	if filled > width {
+		filled = width
+	}
+
+	// Create gradient effect
+	fullChars := []string{"█", "▓", "▒", "░"}
+	var bar strings.Builder
+	
+	for i := 0; i < width; i++ {
+		if i < filled {
+			// Gradient effect
+			charIdx := int(float64(i) / float64(width) * float64(len(fullChars)))
+			if charIdx >= len(fullChars) {
+				charIdx = len(fullChars) - 1
+			}
+			bar.WriteString(colorize(s.theme.ProgressFull, fullChars[charIdx]))
+		} else {
+			bar.WriteString(colorize(s.theme.ProgressEmpty, "░"))
+		}
+	}
+	
+	return fmt.Sprintf("[%s]", bar.String())
+}
+
+func (s *StatusBar) buildStatusLine(spinner, bar string, percent float64, message, speed, eta string, elapsed time.Duration) string {
+	percentStr := fmt.Sprintf("%.0f%%", percent*100)
+	
+	// Truncate message if too long
+	maxMsgLen := 30
+	if len(message) > maxMsgLen {
+		message = message[:maxMsgLen-3] + "..."
+	}
+
+	var parts []string
+	
+	// Main info
+	parts = append(parts, colorize(s.theme.Spinner, spinner))
+	parts = append(parts, colorize(s.theme.Accent, s.pkgName))
+	parts = append(parts, bar)
+	parts = append(parts, colorize(s.theme.Text, percentStr))
+	parts = append(parts, colorize(s.theme.Info, "| "+message))
+	
+	// Speed and ETA if available
+	if speed != "" && eta != "" {
+		parts = append(parts, colorize(s.theme.Warning, speed))
+		parts = append(parts, colorize(s.theme.Info, eta))
+	}
+	
+	// Always show elapsed time
+	parts = append(parts, colorize(s.theme.Text, formatDuration(elapsed)))
+	
+	return strings.Join(parts, " ")
+}
+
+func (s *StatusBar) PrintHeader(title string) {
+	if !s.enabled {
+		fmt.Printf("=== %s ===\n", title)
+		return
+	}
+	
+	border := colorize(s.theme.Accent, "╔")
+	titleColored := colorize(s.theme.Text, fmt.Sprintf(" %s ", title))
+	borderEnd := colorize(s.theme.Accent, "╗")
+	
+	fmt.Printf("%s%s%s\n", border, titleColored, borderEnd)
+}
+
+func (s *StatusBar) PrintFooter() {
+	if !s.enabled {
+		fmt.Printf("===================\n")
+		return
+	}
+	
+	border := colorize(s.theme.Accent, "╚")
+	borderEnd := colorize(s.theme.Accent, "╝")
+	content := colorize(s.theme.Text, strings.Repeat("═", 50))
+	
+	fmt.Printf("%s%s%s\n", border, content, borderEnd)
+}
+
+func (s *StatusBar) PrintInfo(message string) {
+	if !s.enabled {
+		fmt.Printf("ℹ️  %s\n", message)
+		return
+	}
+	
+	icon := colorize(s.theme.Info, "ℹ️")
+	text := colorize(s.theme.Text, message)
+	fmt.Printf("  %s %s\n", icon, text)
+}
+
+func (s *StatusBar) PrintSuccess(message string) {
+	if !s.enabled {
+		fmt.Printf("✅ %s\n", message)
+		return
+	}
+	
+	icon := colorize(s.theme.Success, "✅")
+	text := colorize(s.theme.Text, message)
+	fmt.Printf("  %s %s\n", icon, text)
+}
+
+func (s *StatusBar) PrintWarning(message string) {
+	if !s.enabled {
+		fmt.Printf("⚠️  %s\n", message)
+		return
+	}
+	
+	icon := colorize(s.theme.Warning, "⚠️")
+	text := colorize(s.theme.Text, message)
+	fmt.Printf("  %s %s\n", icon, text)
+}
+
+func (s *StatusBar) PrintError(message string) {
+	if !s.enabled {
+		fmt.Printf("❌ %s\n", message)
+		return
+	}
+	
+	icon := colorize(s.theme.Error, "❌")
+	text := colorize(s.theme.Text, message)
+	fmt.Printf("  %s %s\n", icon, text)
+}
+
+// Helper functions
+
+func colorize(color, text string) string {
+	if !supportsANSIAndTTY() || os.Getenv("NO_COLOR") != "" {
+		return text
+	}
+	return fmt.Sprintf("\033[%sm%s\033[0m", color, text)
+}
+
+func formatDuration(d time.Duration) string {
+	if d < time.Second {
+		return fmt.Sprintf("%dms", d.Milliseconds())
+	}
+	if d < time.Minute {
+		return fmt.Sprintf("%.1fs", d.Seconds())
+	}
+	if d < time.Hour {
+		return fmt.Sprintf("%.0fm %.0fs", 
+			d.Minutes(), 
+			float64(int(d.Seconds())%60))
+	}
+	return fmt.Sprintf("%.0fh %.0fm", 
+		d.Hours(), 
+		float64(int(d.Minutes())%60))
+}
+
+func visibleLen(s string) int {
+	// Remove ANSI escape codes for length calculation
+	result := 0
+	inEscape := false
+	
+	for _, r := range s {
+		if r == '\033' {
+			inEscape = true
+		} else if inEscape && r == 'm' {
+			inEscape = false
+		} else if !inEscape {
+			result++
+		}
+	}
+	
+	return result
+}
+
+func supportsANSIAndTTY() bool {
+	if os.Getenv("NO_COLOR") != "" {
+		return false
+	}
+	term := strings.TrimSpace(strings.ToLower(os.Getenv("TERM")))
+	if term == "" || term == "dumb" {
+		return false
+	}
+	info, err := os.Stdout.Stat()
+	if err != nil {
+		return false
+	}
+	return (info.Mode() & os.ModeCharDevice) != 0
+}
diff --git a/zsvo b/zsvo
index f90d1fb..3303189 100755
Binary files a/zsvo and b/zsvo differ