feat(config): add system panel with reset and starship theme, add onboarding wizard

- Add PanelSystem with reset config and apply starship theme (charm/zerotwo/default)
- Add OnboardingWizard that activates when profile is empty on first run
- Fix <thing> tag parsing in Shell AI messages (wait for </thing> before rendering)
- Add /api/config/reset and /api/starship/apply-theme endpoints
- Wire wizard trigger in App.jsx based on profile completeness

💘 Generated with Crush

Assisted-by: MiniMax-M2.7 via Crush <crush@charm.land>

internal/api/handlers_config.go

@@ -3,8 +3,11 @@ package api
 import (
 	"bytes"
 	"encoding/json"
+	"fmt"
 	"io"
 	"net/http"
+	"os"
+	"path/filepath"
 	"strings"
 	"time"
 
@@ -281,3 +284,203 @@ func (s *Server) handleGetTerminalThemes(w http.ResponseWriter, r *http.Request)
 	}
 	writeJSON(w, map[string]interface{}{"themes": themes})
 }
+
+func (s *Server) handleResetConfig(w http.ResponseWriter, r *http.Request) {
+	if r.Method != "POST" {
+		writeError(w, "POST only", http.StatusMethodNotAllowed)
+		return
+	}
+	dir, err := config.ConfigDir()
+	if err != nil {
+		writeError(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
+	path := filepath.Join(dir, "config.yaml")
+	if err := os.Remove(path); err != nil && !os.IsNotExist(err) {
+		writeError(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
+	s.config = config.Default()
+	if err := config.Save(s.config); err != nil {
+		writeError(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
+	writeJSON(w, map[string]string{"status": "ok"})
+}
+
+func (s *Server) handleApplyStarshipTheme(w http.ResponseWriter, r *http.Request) {
+	if r.Method != "POST" {
+		writeError(w, "POST only", http.StatusMethodNotAllowed)
+		return
+	}
+	var body struct {
+		Theme string `json:"theme"`
+	}
+	if err := json.NewDecoder(r.Body).Decode(&body); err != nil {
+		writeError(w, err.Error(), http.StatusBadRequest)
+		return
+	}
+	if body.Theme == "" {
+		body.Theme = s.config.Terminal.PromptTheme
+	}
+
+	cfgDir, err := config.ConfigDir()
+	if err != nil {
+		writeError(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
+	starshipDir := filepath.Join(cfgDir, "starship")
+	if err := os.MkdirAll(starshipDir, 0755); err != nil {
+		writeError(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
+	themeFile := filepath.Join(starshipDir, "starship.toml")
+
+	themeContent := getStarshipThemeConfig(body.Theme)
+	if err := os.WriteFile(themeFile, []byte(themeContent), 0644); err != nil {
+		writeError(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
+
+	home, _ := os.UserHomeDir()
+	shellRCs := []string{
+		filepath.Join(home, ".bashrc"),
+		filepath.Join(home, ".zshrc"),
+	}
+	for _, rc := range shellRCs {
+		if _, err := os.Stat(rc); err != nil {
+			continue
+		}
+		content, _ := os.ReadFile(rc)
+		if strings.Contains(string(content), "STARSHIP_CONFIG") {
+			continue
+		}
+		exportLine := fmt.Sprintf("\n# Muyue Starship config\nexport STARSHIP_CONFIG=%s\n", themeFile)
+		f, err := os.OpenFile(rc, os.O_APPEND|os.O_WRONLY, 0644)
+		if err != nil {
+			continue
+		}
+		f.WriteString(exportLine)
+		f.Close()
+	}
+
+	s.config.Terminal.PromptTheme = body.Theme
+	config.Save(s.config)
+
+	writeJSON(w, map[string]interface{}{"status": "ok", "config": themeFile})
+}
+
+func getStarshipThemeConfig(theme string) string {
+	switch theme {
+	case "charm":
+		return `[format]
+before_format = "$"
+format = """
+$username$directory$git_branch$git_status$cmd_duration$line_break$character"""
+
+[character]
+success_symbol = "[➜](bold #00E676)"
+error_symbol = "[✗](bold #FF0033)"
+
+[directory]
+truncation_length = 3
+truncation_symbol = "…/"
+style = "bold #00BCD4"
+
+[username]
+show_on_left = false
+style_user = "bold #FF0033"
+style_root = "bold #FF0033"
+
+[git_branch]
+symbol = " "
+format = "on [$symbol$branch]($style)"
+style = "bold #FFD740"
+
+[git_status]
+format = "[$all_status$ahead_behind]($style) "
+style = "bold #FF1A5E"
+conflicted = "!"
+untracked = "?"
+modified = "~"
+staged = "[+]"
+renamed = "»"
+deleted = "-"
+
+[cmd_duration]
+min_time = 500
+format = "took [$duration]($style)"
+style = "bold #75715E"
+`
+	case "zerotwo":
+		return `[format]
+before_format = "$"
+format = """
+$username$directory$git_branch$git_status$cmd_duration$line_break$character"""
+
+[character]
+success_symbol = "[❯](bold #3B82F6)"
+error_symbol = "[❯](bold #EF4444)"
+
+[directory]
+truncation_length = 3
+truncation_symbol = "…/"
+style = "bold #8B5CF6"
+
+[username]
+show_on_left = false
+style_user = "bold #EC4899"
+style_root = "bold #EF4444"
+
+[git_branch]
+symbol = " "
+format = "on [$symbol$branch]($style)"
+style = "bold #F472B6"
+
+[git_status]
+format = "[$all_status$ahead_behind]($style) "
+style = "bold #EF4444"
+conflicted = "!"
+untracked = "?"
+modified = "~"
+staged = "[+]"
+renamed = "»"
+deleted = "-"
+
+[cmd_duration]
+min_time = 500
+format = "took [$duration]($style)"
+style = "bold #6B7280"
+`
+	default:
+		return `[format]
+before_format = "$"
+format = """
+$username$directory$git_branch$git_status$line_break$character"""
+
+[character]
+success_symbol = "[❯](bold green)"
+error_symbol = "[❯](bold red)"
+
+[directory]
+truncation_length = 3
+truncation_symbol = "…/"
+style = "bold cyan"
+
+[username]
+show_on_left = false
+style_user = "bold red"
+style_root = "bold red"
+
+[git_branch]
+symbol = " "
+format = "on [$symbol$branch]($style)"
+style = "bold yellow"
+
+[cmd_duration]
+min_time = 500
+format = "took [$duration]($style)"
+style = "bold bright-black"
+`
+	}
+}