feat(frontend): 添加 SSH 终端运行中标记

为 SSH 顶部服务器标签和内部终端标签补充 `%` 运行中提示，
并基于发送命令、shell prompt、断连与错误链路派生运行态。

packages/frontend/src/components/LayoutRenderer.vue

@@ -654,6 +654,13 @@ onBeforeUnmount(() => {
                                    <span class="whitespace-nowrap">
                                        {{ t('terminalTabBar.terminalBadge', { index: session.terminalIndex }) }}
                                    </span>
+                                   <span
+                                       v-if="session.isCommandRunning"
+                                       class="ml-2 rounded-sm px-1 text-[10px] font-semibold uppercase tracking-wide text-amber-400"
+                                       :title="t('terminalTabBar.commandRunningIndicator')"
+                                   >
+                                       %
+                                   </span>
                                    <button
                                        type="button"
                                        class="ml-2 rounded-full p-0.5 text-text-secondary opacity-0 transition-opacity duration-150 hover:bg-header hover:text-foreground group-hover:opacity-100"

packages/frontend/src/components/TerminalTabBar.vue

@@ -100,6 +100,14 @@ const getRepresentativeSessionId = (connectionId: string, fallbackSessionId: str
 
 const getConnectionSessionCount = (connectionId: string) => getConnectionSessions(connectionId).length;
 
+const getConnectionRunningSessionCount = (connectionId: string) =>
+  getConnectionSessions(connectionId).filter((session) => session.isCommandRunning).length;
+
+const isConnectionRunning = (connectionId: string) => getConnectionRunningSessionCount(connectionId) > 0;
+
+const getConnectionRunningIndicatorTitle = (connectionId: string) =>
+  t('terminalTabBar.commandRunningIndicatorCount', { count: getConnectionRunningSessionCount(connectionId) });
+
 const shouldRenderTopLevelItem = (session: SessionTabInfoWithStatus, index: number) => {
   if (!isSshConnection(session.connectionId)) {
     return true;
@@ -564,6 +572,13 @@ onBeforeUnmount(() => {
                 <span class="max-w-[180px] truncate text-xs font-semibold tracking-wide">
                   {{ session.connectionName }}
                 </span>
+                <span
+                  v-if="isConnectionRunning(session.connectionId)"
+                  class="rounded-sm px-1 text-[10px] font-semibold uppercase tracking-wide text-amber-400"
+                  :title="getConnectionRunningIndicatorTitle(session.connectionId)"
+                >
+                  %
+                </span>
                 <span
                   :class="[
                     'rounded-full px-1.5 py-0.5 text-[10px] font-semibold',