Revamp Dashboard UI and enhance target display.

Refactored the dashboard page to improve layout and clarity, including updated KPIs with better alert and status representation. Redesigned the target list to a card-based layout with clear status indicators and actionable buttons. Updated styles for consistency and better user experience.

frontend/src/pages/TargetsPage.jsx

@@ -137,7 +137,7 @@ export function TargetsPage() {
               </small>
             </div>
             <div className="field submit-field">
-              <div className="target-actions">
+              <div className="form-actions">
                 <button type="button" className="secondary-btn" onClick={testConnection} disabled={testState.loading}>
                   {testState.loading ? "Testing..." : "Test connection"}
                 </button>