Display selected host with brackets in title bar

- Change nftables port labels to lowercase 'wan tcp:' and 'wan udp:'
- Add brackets around selected host in title bar for clarity

dashboard/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "cm-dashboard"
-version = "0.1.256"
+version = "0.1.257"
 edition = "2021"
 
 [dependencies]

dashboard/src/ui/mod.rs

@@ -556,7 +556,14 @@ impl TuiApp {
             ));
 
             if Some(host) == self.current_host.as_ref() {
-                // Selected host in bold background color against status background
+                // Selected host with brackets in bold background color against status background
+                host_spans.push(Span::styled(
+                    "[",
+                    Style::default()
+                        .fg(Theme::background())
+                        .bg(background_color)
+                        .add_modifier(Modifier::BOLD),
+                ));
                 host_spans.push(Span::styled(
                     host.clone(),
                     Style::default()
@@ -564,6 +571,13 @@ impl TuiApp {
                         .bg(background_color)
                         .add_modifier(Modifier::BOLD),
                 ));
+                host_spans.push(Span::styled(
+                    "]",
+                    Style::default()
+                        .fg(Theme::background())
+                        .bg(background_color)
+                        .add_modifier(Modifier::BOLD),
+                ));
             } else {
                 // Other hosts in normal background color against status background
                 host_spans.push(Span::styled(