Update application UI and functionality

server/unified-management/internal/config/preflight.go

@@ -4,6 +4,8 @@ import (
 	"fmt"
 	"os"
 	"path/filepath"
+	"regexp"
+	"strings"
 
 	webassets "ymhut-box/server/unified-management/web"
 )
@@ -44,13 +46,47 @@ func Preflight(cfg *Config) []Check {
 		checkSeedFile("legacy update-info", filepath.Join(cfg.UpdatePublicDir, "update-info.json"), []byte(defaultUpdateInfoJSON)),
 		checkSeedFile("legacy media-types", filepath.Join(cfg.UpdatePublicDir, "media-types.json"), []byte(defaultMediaTypesJSON)),
 		checkNoticeIndex("version notice index", filepath.Join(cfg.UpdateNoticeDir, "total.json")),
-		checkWebBuild("admin web dist", cfg.AdminWebDir, "admin/dist"),
+		checkAdminWebBuild("admin web dist", cfg.AdminWebDir, "admin/dist"),
 		checkWebBuild("portal web dist", cfg.PortalWebDir, "portal/dist"),
 		checkWebBuild("setup web dist", cfg.SetupWebDir, "setup/dist"),
 	}
 	return checks
 }
 
+var adminPreflightAssetPattern = regexp.MustCompile(`(?:src|href)=["'](/admin/assets/[^"'?#]+)`)
+
+func checkAdminWebBuild(name, path, embedRoot string) Check {
+	check := checkWebBuild(name, path, embedRoot)
+	if check.Status != "ok" || strings.Contains(check.Message, "embedded frontend assets") {
+		return check
+	}
+	index := filepath.Join(path, "index.html")
+	data, err := os.ReadFile(index)
+	if err != nil {
+		return check
+	}
+	matches := adminPreflightAssetPattern.FindAllSubmatch(data, -1)
+	if len(matches) == 0 {
+		return Check{Name: name, Status: "error", Path: index, Message: "index.html does not reference any /admin/assets files"}
+	}
+	for _, match := range matches {
+		assetPath := strings.TrimPrefix(string(match[1]), "/admin/")
+		if strings.Contains(assetPath, "..") || strings.ContainsAny(assetPath, `\`) {
+			return Check{Name: name, Status: "error", Path: index, Message: fmt.Sprintf("invalid admin asset reference %s", assetPath)}
+		}
+		info, statErr := os.Stat(filepath.Join(path, filepath.FromSlash(assetPath)))
+		if statErr == nil && !info.IsDir() {
+			continue
+		}
+		message := fmt.Sprintf("disk asset %s is missing", assetPath)
+		if embeddedWebBuildOK(embedRoot) {
+			return Check{Name: name, Status: "ok", Path: path, Message: message + "; using embedded frontend assets"}
+		}
+		return Check{Name: name, Status: "error", Path: filepath.Join(path, filepath.FromSlash(assetPath)), Message: message}
+	}
+	return check
+}
+
 func checkDir(name, path string, create bool) Check {
 	if create {
 		if err := os.MkdirAll(path, 0o750); err != nil {