feat: add TLS certificate management functionality

- Implemented TLS certificate model and service for managing certificates.
- Added API endpoints for creating, importing, listing, and deleting TLS certificates.
- Enhanced proxy route configuration to support HTTPS with certificate selection.
- Updated frontend to include TLS certificate management UI with manual and file import options.
- Added validation for HTTPS routes to ensure certificates are selected.
- Implemented tests for TLS certificate creation and proxy route validation.

atsf_server/web/src/components/Header.js

@@ -44,6 +44,12 @@ const headerButtons = [
     icon: 'tasks',
     admin: true,
   },
+  {
+    name: '证书',
+    to: '/tls-certificate',
+    icon: 'lock',
+    admin: true,
+  },
   {
     name: '文件',
     to: '/file',