fix: 优化进程管理器中的命令获取逻辑，避免依赖表格列顺序，并更新中文标签以提高可读性

fix: 释放挂起的进程终止通道，防止重复超时导致内存累积

frontend/src/process-manager.ts

@@ -205,9 +205,10 @@ export class ProcessManager {
       if (killButton) {
         const pid = Number.parseInt(killButton.dataset.processKillPid ?? '', 10);
         if (!Number.isSafeInteger(pid) || pid <= 0) return;
-        const row = killButton.closest<HTMLTableRowElement>('tr');
-        const commandCell = row?.children.item(7);
-        const command = commandCell?.textContent ?? '--';
+        // Reuse the command text already stored on the button's title attribute (set in render()).
+        // Avoids depending on the table's column order via children.item(N), which breaks when
+        // columns are added or rearranged.
+        const command = killButton.title || '--';
         this.openKillDialog(pid, command);
         return;
       }
@@ -630,8 +631,8 @@ export class ProcessManager {
 
     const fragment = document.createDocumentFragment();
     const language = this.getLanguage();
-    const killLabelZh = '强制结束';
-    const killLabelEn = 'Force terminate';
+    const killLabelZh = '结束进程';
+    const killLabelEn = 'Terminate process';
     for (const process of this.sortedProcesses(snapshot.processes)) {
       const row = document.createElement('tr');
       const values = [

src/backend/session.ts

@@ -1138,6 +1138,15 @@ export class SSHSession {
       stdout: '',
       stderr: 'Timed out opening the kill channel',
     });
+    // Release the pending kill entry (with its decoders + stdout/stderr buffers)
+    // so repeated timeouts cannot accumulate in worker memory. We deliberately
+    // do NOT delete from this.channels here — keeping the SSH channel registered
+    // means a late CHANNEL_OPEN_CONFIRMATION still resolves in handleChannel()
+    // (channel found in this.channels) and falls through to the generic close
+    // branch instead of throwing "unknown recipient". The resulting
+    // CHANNEL_CLOSE handler then finds no pending kill and quietly skips
+    // finalize, so there is no double result-send.
+    this.pendingProcessKillChannels.delete(expected.channelID);
     if (expected.channel.isOpen()) void this.sendAuxiliaryChannelClose(expected.channel);
   }