feat: UI improvements with icons, back navigation, and overview cards (#7)

compliance-dashboard/src/pages/impact_analysis.rs

@@ -1,4 +1,6 @@
 use dioxus::prelude::*;
+use dioxus_free_icons::icons::bs_icons::*;
+use dioxus_free_icons::Icon;
 
 use crate::components::page_header::PageHeader;
 use crate::infrastructure::graph::fetch_impact;
@@ -12,6 +14,15 @@ pub fn ImpactAnalysisPage(repo_id: String, finding_id: String) -> Element {
     });
 
     rsx! {
+        div { class: "back-nav",
+            button {
+                class: "btn btn-ghost btn-back",
+                onclick: move |_| { navigator().go_back(); },
+                Icon { icon: BsArrowLeft, width: 16, height: 16 }
+                "Back"
+            }
+        }
+
         PageHeader {
             title: "Impact Analysis",
             description: "Blast radius and affected entry points for a security finding",