refactor: remove unused ThreatAlert components from frontend views

- Remove dead ThreatAlert component code from BruteForceView, HeaderFingerprintView, MLFeaturesView, and TcpSpoofingView
- Clean up unused type definitions and imports

Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>

Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>

frontend/src/components/BruteForceView.tsx

@@ -47,14 +47,6 @@ function StatCard({ label, value, accent }: { label: string; value: string | num
   );
 }
 
-: { message: string }) {
-  return (
-    <div className="bg-threat-critical/10 border border-threat-critical/30 rounded-lg p-4 text-threat-critical">
-      ⚠️ {message}
-    </div>
-  );
-}
-
 // ─── Attackers DataTable ─────────────────────────────────────────────────────
 
 function AttackersTable({

frontend/src/components/HeaderFingerprintView.tsx

@@ -66,14 +66,6 @@ function StatCard({ label, value, accent }: { label: string; value: string | num
   );
 }
 
-: { message: string }) {
-  return (
-    <div className="bg-threat-critical/10 border border-threat-critical/30 rounded-lg p-4 text-threat-critical">
-      ⚠️ {message}
-    </div>
-  );
-}
-
 // ─── Main Component ───────────────────────────────────────────────────────────
 
 export function HeaderFingerprintView() {

frontend/src/components/MLFeaturesView.tsx

@@ -81,14 +81,6 @@ function fuzzingBadgeClass(value: number): string {
 
 // ─── Sub-components ───────────────────────────────────────────────────────────
 
-: { message: string }) {
-  return (
-    <div className="bg-threat-critical/10 border border-threat-critical/30 rounded-lg p-4 text-threat-critical">
-      ⚠️ {message}
-    </div>
-  );
-}
-
 // ─── Radar Chart (SVG octagonal) ─────────────────────────────────────────────
 
 const RADAR_AXES = [

frontend/src/components/TcpSpoofingView.tsx

@@ -110,14 +110,6 @@ function StatCard({ label, value, accent }: { label: string; value: string | num
   );
 }
 
-: { message: string }) {
-  return (
-    <div className="bg-threat-critical/10 border border-threat-critical/30 rounded-lg p-4 text-threat-critical">
-      ⚠️ {message}
-    </div>
-  );
-}
-
 // ─── Detections DataTable ─────────────────────────────────────────────────────
 
 function TcpDetectionsTable({