update:新增个人训练重连机制，修复海报

src/matchWebsocket.js

@@ -849,6 +849,7 @@ export function connectMatchWebSocket(options = {}) {
     token,
     mode,
     requestPracticeInfoOnOpen = false,
+    appHideResumable = false,
     force = false,
     reconnecting = false,
     reconnectReason = "",
@@ -920,6 +921,7 @@ export function connectMatchWebSocket(options = {}) {
     isMelee:
       Number.isFinite(normalizedMode) ? normalizedMode > 3 : undefined,
     requestPracticeInfoOnOpen: requestPracticeInfoOnOpen === true,
+    appHideResumable: appHideResumable === true,
     meleeHalfRest: isSameContext
       ? currentContext?.meleeHalfRest === true
       : false,
@@ -1016,9 +1018,22 @@ export function connectMatchWebSocketFromNotice(notice, fallbackUserId) {
   });
 }
 
+export function setMatchAppHideResumable(enabled) {
+  if (!currentContext) return;
+  currentContext.appHideResumable = enabled === true;
+}
+
 export function closeMatchWebSocket(options = {}) {
   // 默认关闭时会发送 LEAVE；内部切换连接可通过 sendLeave:false 跳过。
-  const { sendLeave: shouldSendLeave = true, reason = "manual" } = options;
+  const { reason = "manual" } = options;
+  // 可恢复训练切后台只断开传输层，不能把它上报成主动离场。
+  const shouldSendLeave =
+    options.sendLeave === undefined
+      ? !(
+          reason === "app-hide" &&
+          currentContext?.appHideResumable === true
+        )
+      : options.sendLeave === true;
 
   manualClose = true;
   clearReconnectTimer();
@@ -1051,6 +1066,7 @@ export default {
   ServerMessageType,
   connectMatchWebSocket,
   connectMatchWebSocketFromNotice,
+  setMatchAppHideResumable,
   closeMatchWebSocket,
   forceReconnectMatchWebSocket,
   handleMatchNetworkStatusChange,