Simplify admin publishing pipeline

backend/internal/admin/static.go

@@ -46,6 +46,33 @@ func serveAdminFile(c *gin.Context, adminDir string) bool {
 	return true
 }
 
+func serveSiteFile(c *gin.Context, staticDir string) bool {
+	if strings.TrimSpace(staticDir) == "" {
+		return false
+	}
+
+	requested := strings.TrimPrefix(c.Request.URL.Path, "/")
+	if requested == "" {
+		requested = "index.html"
+	}
+	cleaned := filepath.Clean(requested)
+	if cleaned == "." || strings.HasPrefix(cleaned, "..") || filepath.IsAbs(cleaned) {
+		return false
+	}
+
+	path := filepath.Join(staticDir, cleaned)
+	info, err := os.Stat(path)
+	if err == nil && info.IsDir() {
+		path = filepath.Join(path, "index.html")
+		info, err = os.Stat(path)
+	}
+	if err != nil || info.IsDir() {
+		return false
+	}
+	http.ServeFile(c.Writer, c.Request, path)
+	return true
+}
+
 func rewriteAdminBase(page []byte) []byte {
 	return []byte(strings.Replace(string(page), `<base href="/">`, `<base href="/admin/">`, 1))
 }