Refactor DNS and SMTP configurations; add system DNS management

- Updated DNS server address configuration to use BindAddress and DnsPort.
- Enhanced email submission to utilize BindAddress for SMTP server address.
- Improved error messages for unknown recipient domains.
- Introduced a new OrderedMap structure for route management.
- Added system DNS management functions for Linux, Darwin, and Windows platforms.
- Created new dashboard services for DNS configuration and overview.
- Updated UI to include Proxy Rules section and improved descriptions.
- Added new utility functions for handling DNS configurations.

1 files changed, 23 insertions, 0 deletions

diff --git a/static/css/tailwind.css b/static/css/tailwind.css
index d741e81..98ce60a 100644
--- a/static/css/tailwind.css
+++ b/static/css/tailwind.css
@@ -308,6 +308,29 @@
   background: rgba(99, 102, 241, 0.1);
 }
 
+.dropdown-compact .dropdown-menu {
+  top: calc(100% + 0.25rem);
+  min-width: 10rem;
+  border-radius: 0.5rem;
+  left: auto;
+  right: 0;
+}
+
+.dropdown-compact .dropdown-options {
+  max-height: 9rem;
+  padding: 0.125rem;
+}
+
+.dropdown-compact .dropdown-option {
+  padding: 0.3rem 0.5rem;
+  border-radius: 0.375rem;
+  font-size: 0.6875rem;
+}
+
+.dropdown-compact .dropdown-option p {
+  font-size: 0.6875rem;
+}
+
 .alert-toast {
   padding: 0.75rem 1rem;
   border-radius: 0.75rem;