Update: 将子项目从 submodule 转为完整内容

- 移除 GovAI, nomifun-tauri, 算力盒子 的 submodule 引用
- 添加所有子项目的完整源代码
- 保留原始 .git 为 .git.bak 备份

GovAI/server/internal/middleware/rbac.go

@@ -0,0 +1,41 @@
+package middleware
+
+import (
+	"net/http"
+
+	"github.com/enterprise-ai-platform/server/internal/response"
+)
+
+var roleLevel = map[string]int{
+	"user":        0,
+	"creator":     1,
+	"admin":       2,
+	"super_admin": 3,
+}
+
+// RequireRole returns middleware that checks if user has the minimum required role.
+func RequireRole(minRole string) func(http.Handler) http.Handler {
+	minLevel := roleLevel[minRole]
+	return func(next http.Handler) http.Handler {
+		return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			role := GetRole(r.Context())
+			if roleLevel[role] < minLevel {
+				response.Forbidden(w, "权限不足")
+				return
+			}
+			next.ServeHTTP(w, r)
+		})
+	}
+}
+
+// RequireSuperAdmin restricts access to platform-level (super_admin) operations only.
+// Unlike RequireRole("admin")，super admin 不受机构(org_id)限制，可执行跨机构操作。
+func RequireSuperAdmin(next http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if GetRole(r.Context()) != "super_admin" {
+			response.Forbidden(w, "仅平台管理员可访问")
+			return
+		}
+		next.ServeHTTP(w, r)
+	})
+}