feat: redesign TUI + Ctrl+C quit confirm + version logic + sudo handling

- Replace 'q' quit with Ctrl+C confirmation dialog (Yes/No overlay)
  Second Ctrl+C within 2s force quits
- Redesign TUI with Charm bubbles components: spinner, progress bar,
  help bar, key bindings, better color palette, rounded borders
- Add Shift+Tab to cycle tabs backward
- Fix version: bump to 0.2.0, release workflow checks existing tags
  before publishing (no more overwriting releases)
- Handle sudo: CLI auto-relaunches with sudo/pkexec for tools that
  need elevated privileges, TUI shows clear error message

💘 Generated with Crush

Assisted-by: GLM-5.1 via Crush <crush@charm.land>

cmd/muyue/main.go

@@ -3,6 +3,8 @@ package main
 import (
 	"fmt"
 	"os"
+	"os/exec"
+	"strings"
 
 	tea "github.com/charmbracelet/bubbletea"
 	"github.com/muyue/muyue/internal/config"
@@ -71,7 +73,7 @@ Usage:
 Commands:
   version            Show version
   scan               Scan your system for tools and runtimes
-  install [tools]    Install missing tools (crush, claude, bmad, starship, go, node, python, git)
+  install [tools]    Install missing tools (needs sudo for some tools)
   update             Check and apply updates for all tools
   setup              Run first-time setup wizard
   config             Show current configuration
@@ -82,8 +84,8 @@ Commands:
 
 TUI Controls:
   1-5                Switch tabs (Dashboard/Chat/Workflow/Agents/Config)
-  Tab                Cycle to next tab
-  q / Ctrl+C         Quit
+  Tab / Shift+Tab    Cycle tabs
+  Ctrl+C             Show quit confirmation (press twice quickly to force quit)
 
 Chat Commands:
   /plan <goal>       Start a structured Plan→Execute workflow
@@ -94,6 +96,10 @@ Workflow Controls:
   [g]                Generate plan (after answering questions)
   [n]                Execute next step
   [x]                Cancel/reset workflow
+
+Note:
+  Some tools (docker, gh, etc.) require elevated privileges.
+  Run 'sudo muyue install' or use 'pkexec muyue install' if needed.
 `, version.FullVersion())
 }
 
@@ -174,6 +180,38 @@ func runInstall(tools []string) {
 		tools = missing
 	}
 
+	if needsSudo(tools) && os.Geteuid() != 0 {
+		fmt.Println("Some tools require elevated privileges.")
+		if path, err := exec.LookPath("sudo"); err == nil {
+			fmt.Printf("Re-running with sudo...\n")
+			cmd := exec.Command(path, append([]string{os.Args[0], "install"}, tools...)...)
+			cmd.Stdin = os.Stdin
+			cmd.Stdout = os.Stdout
+			cmd.Stderr = os.Stderr
+			if err := cmd.Run(); err != nil {
+				fmt.Fprintf(os.Stderr, "sudo install failed: %v\n", err)
+				os.Exit(1)
+			}
+			config.Save(cfg)
+			return
+		}
+		if path, err := exec.LookPath("pkexec"); err == nil {
+			fmt.Printf("Re-running with pkexec...\n")
+			cmd := exec.Command(path, append([]string{os.Args[0], "install"}, tools...)...)
+			cmd.Stdin = os.Stdin
+			cmd.Stdout = os.Stdout
+			cmd.Stderr = os.Stderr
+			if err := cmd.Run(); err != nil {
+				fmt.Fprintf(os.Stderr, "pkexec install failed: %v\n", err)
+				os.Exit(1)
+			}
+			config.Save(cfg)
+			return
+		}
+		fmt.Println("Neither sudo nor pkexec found. Some installs may fail.")
+		fmt.Println("Try running: sudo muyue install")
+	}
+
 	results := inst.InstallAll(tools)
 	for _, r := range results {
 		status := "[OK]"
@@ -186,6 +224,18 @@ func runInstall(tools []string) {
 	config.Save(cfg)
 }
 
+func needsSudo(tools []string) bool {
+	sudoTools := map[string]bool{
+		"docker": true, "git": true, "gh": true, "node": true, "python": true,
+	}
+	for _, t := range tools {
+		if sudoTools[t] {
+			return true
+		}
+	}
+	return false
+}
+
 func runUpdate() {
 	fmt.Println("Checking for updates...")
 	result := scanner.ScanSystem()
@@ -432,7 +482,7 @@ func runSkills(args []string) {
 			Description: description,
 			Content:     resp,
 			Author:      "muyue-generated",
-			Version:     "1.0.0",
+			Version:     "0.1.0",
 			Target:      target,
 			Tags:        []string{"generated"},
 		}
@@ -468,3 +518,22 @@ func runSkills(args []string) {
 		fmt.Println("Available: list, show, generate, deploy, init, delete")
 	}
 }
+
+func checkConfigProviders(cfg *config.MuyueConfig) {
+	for i := range cfg.AI.Providers {
+		if cfg.AI.Providers[i].Active {
+			return
+		}
+	}
+	if len(cfg.AI.Providers) > 0 {
+		cfg.AI.Providers[0].Active = true
+	}
+}
+
+func joinWithQuotes(items []string) string {
+	quoted := make([]string, len(items))
+	for i, item := range items {
+		quoted[i] = fmt.Sprintf("%q", item)
+	}
+	return strings.Join(quoted, ", ")
+}