feat(api): add GET /version endpoint

Returns the server name and configured client mode as JSON,
enabling clients like MHBridge to display server version info.

CHANGELOG.md

@@ -9,6 +9,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Added
 
+- API: `GET /version` endpoint returning server name and client mode (`{"clientMode":"ZZ","name":"Erupe-CE"}`)
 - Rework object ID allocation: per-session IDs replace shared map, simplify stage entry notifications
 - Better config file handling and structure
 - Comprehensive production logging for save operations (warehouse, Koryo points, savedata, Hunter Navi, plate equipment)

server/api/api_server.go

@@ -55,6 +55,7 @@ func (s *APIServer) Start() error {
 	r.HandleFunc("/character/export", s.ExportSave)
 	r.HandleFunc("/api/ss/bbs/upload.php", s.ScreenShot)
 	r.HandleFunc("/api/ss/bbs/{id}", s.ScreenShotGet)
+	r.HandleFunc("/version", s.Version)
 	handler := handlers.CORS(handlers.AllowedHeaders([]string{"Content-Type"}))(r)
 	s.httpServer.Handler = handlers.LoggingHandler(os.Stdout, handler)
 	s.httpServer.Addr = fmt.Sprintf(":%d", s.erupeConfig.API.Port)

server/api/endpoints.go

@@ -123,6 +123,22 @@ func (s *APIServer) newAuthData(userID uint32, userRights uint32, userTokenID ui
 	return resp
 }
 
+// VersionResponse is the JSON payload returned by the /version endpoint.
+type VersionResponse struct {
+	ClientMode string `json:"clientMode"`
+	Name       string `json:"name"`
+}
+
+// Version handles GET /version and returns the server name and client mode.
+func (s *APIServer) Version(w http.ResponseWriter, r *http.Request) {
+	resp := VersionResponse{
+		ClientMode: s.erupeConfig.ClientMode,
+		Name:       "Erupe-CE",
+	}
+	w.Header().Add("Content-Type", "application/json")
+	_ = json.NewEncoder(w).Encode(resp)
+}
+
 // Launcher handles GET /launcher and returns banners, messages, and links for the launcher UI.
 func (s *APIServer) Launcher(w http.ResponseWriter, r *http.Request) {
 	var respData LauncherResponse