fix: improve endgame clock and gameplay stability

internal/sdkserver/server.go

@@ -42,8 +42,21 @@ func loadHotfix() map[string]VersionConfig {
 	if raw, err := os.ReadFile("hotfix.json"); err == nil {
 		_ = json.Unmarshal(raw, &out)
 	}
+	if out == nil {
+		out = map[string]VersionConfig{}
+	}
 	if raw, err := os.ReadFile("versions.json"); err == nil {
-		_ = json.Unmarshal(raw, &out)
+		var cached map[string]VersionConfig
+		if json.Unmarshal(raw, &cached) == nil {
+			for version, cfg := range cached {
+				// A failed fetch previously persisted an empty cache entry. It
+				// must not hide usable bundled metadata for the same version.
+				if cfg == (VersionConfig{}) && out[version] != (VersionConfig{}) {
+					continue
+				}
+				out[version] = cfg
+			}
+		}
 	}
 	return out
 }
@@ -201,6 +214,7 @@ func queryGateway(state *appState) http.HandlerFunc {
 		_ = params{}
 
 		cfg := state.getOrInsertHotfix(version, seed)
+		Log(fmt.Sprintf("[gateway] version=%q game=%s:%d asset=%t ex_resource=%t lua=%t", version, state.runtime.PublicGameHost, state.runtime.GamePort, cfg.AssetBundleURL != "", cfg.ExResourceURL != "", cfg.LuaURL != ""))
 		if state.runtime.LuaOverlay.Enabled {
 			cfg.LuaURL = state.runtime.PublicSDKURL + luaOverlayRoute
 		}
@@ -305,6 +319,12 @@ func (a *appState) granterLoginReply(w http.ResponseWriter) {
 	})
 }
 
+// The Android SDK decodes data as BeforeVerifyEntity before continuing
+// into the game. An empty object supplies its default false flags.
+func beforeVerifyReply(w http.ResponseWriter) {
+	writeJSON(w, map[string]any{"data": map[string]any{}, "message": "OK", "retcode": 0})
+}
+
 func riskyCheckReply(w http.ResponseWriter) {
 	writeJSON(w, map[string]any{
 		"data": map[string]any{
@@ -628,6 +648,7 @@ func Listen() error {
 	mux.HandleFunc("/{product_name}/combo/granter/api/getConfig", func(w http.ResponseWriter, _ *http.Request) { comboGetConfigReply(w) })
 	mux.HandleFunc("/{product_name}/combo/granter/api/compareProtocolVersion", func(w http.ResponseWriter, _ *http.Request) { compareProtocolVersionReply(w) })
 	mux.HandleFunc("/{product_name}/combo/granter/login/v2/login", func(w http.ResponseWriter, _ *http.Request) { state.granterLoginReply(w) })
+	mux.HandleFunc("/{product_name}/combo/granter/login/beforeVerify", func(w http.ResponseWriter, _ *http.Request) { beforeVerifyReply(w) })
 	mux.HandleFunc("/{product_name}/mdk/agreement/api/getAgreementInfos", func(w http.ResponseWriter, _ *http.Request) { agreementInfosReply(w) })
 
 	mux.HandleFunc("/combo/box/api/config/sdk/combo", func(w http.ResponseWriter, _ *http.Request) { comboConfigReply(w) })
@@ -664,6 +685,8 @@ func Listen() error {
 			state.loginReply(w, r)
 		case strings.Contains(path, "combo/granter/login/v2/login"):
 			state.granterLoginReply(w)
+		case strings.Contains(path, "combo/granter/login/beforeVerify"):
+			beforeVerifyReply(w)
 		case strings.Contains(path, "mdk/shield/api/loadConfig"):
 			shieldLoadConfigReply(w)
 		case strings.Contains(path, "combo/granter/api/getConfig"):