Fix TUI tab index mismatch causing wrong content display

Tab titles array was missing 'Threat Intel', causing Memory to show
nothing, Logs to show Memory content, etc. Added the missing tab.

ghost-tui/src/app.rs

@@ -402,6 +402,6 @@ impl App {
     }
 
     pub fn get_tab_titles(&self) -> Vec<&str> {
-        vec!["Overview", "Processes", "Detections", "Memory", "Logs"]
+        vec!["Overview", "Processes", "Detections", "Threat Intel", "Memory", "Logs"]
     }
 }