fix: 移除会话ID格式化函数，简化连接状态更新逻辑

frontend/src/main.ts

@@ -1082,11 +1082,6 @@ function updateConnectionStatus(message: LocalizedMessage): void {
   }
 }
 
-function formatSessionId(id: string): string {
-  if (!id) return '';
-  return id.length > 8 ? `${id.slice(0, 8)}…` : id;
-}
-
 function setState(state: ConnectionState, label?: string): void {
   connectionState = state;
   const stateLabel = label ?? ({
@@ -1100,11 +1095,10 @@ function setState(state: ConnectionState, label?: string): void {
   ui.liveOrbLabel.textContent = stateLabel;
   ui.liveOrb.title = stateLabel;
   const control = resolveConnectionControl(state, historyPasswordLoading);
-  const sessionPrefix = formatSessionId(currentSessionId);
   const controlLabel = control.action === 'cancel'
     ? bilingual('取消连接', 'Cancel connection')
     : control.action === 'disconnect'
-      ? (sessionPrefix ? `${sessionPrefix} ${bilingual('断开', 'Disconnect')}` : bilingual('断开', 'Disconnect'))
+      ? bilingual('断开', 'Disconnect')
       : control.action === 'disconnecting'
         ? bilingual('断开中...', 'Disconnecting...')
         : bilingual('连接', 'Connect');