Refactor service status response: migrate bangui_version into version field

frontend/src/types/config.ts

@@ -659,10 +659,8 @@ export interface Fail2BanLogResponse {
 export interface ServiceStatusResponse {
   /** Whether fail2ban is reachable via its socket. */
   online: boolean;
-  /** fail2ban version string, or null when offline. */
+  /** BanGUI application version (or null when offline). */
   version: string | null;
-  /** BanGUI application version (from the API). */
-  bangui_version: string;
   /** Number of currently active jails. */
   jail_count: number;
   /** Aggregated current ban count across all jails. */

frontend/src/types/server.ts

@@ -21,6 +21,4 @@ export interface ServerStatus {
 /** Response shape for ``GET /api/dashboard/status``. */
 export interface ServerStatusResponse {
   status: ServerStatus;
-  /** BanGUI application version (from the API). */
-  bangui_version: string;
 }