fix(sessions): archiving a live session stops its pane

Archive on a session a live pane held only hid its row, and the list
deliberately does not bring such a tab back, so the pane kept running
with nothing on screen showing it — a member archived five sessions
believing them closed and kept ~2.7 GB of claude/omp/postgres-mcp alive
for up to two days. Archive on a live session is now a Stop (endRuns,
the tab X's confirm, DELETE /api/run/:id?archive=1) in the sidebar row,
the workspace home's Recents and their right-click menu.

client/src/components/lanes/WorkspaceHome.tsx

@@ -14,7 +14,7 @@
  * a catalog tool's bypass — a YOLO chip for Codex) and Local / New worktree — the workspace's Recents — the sessions it
  * owns and has not archived (`?lane=&archived=0`, with each one's state dot,
  * **Show more** past the first page, and the sidebar row's Rename/Archive in
- * its right-click menu), then the archived ones folded with Unarchive; a live session opens its pane,
+ * its right-click menu — Archive on a live session stops its pane first, `endRuns`), then the archived ones folded with Unarchive; a live session opens its pane,
  * any other its conversation (`&session=`, `SessionReplay`), nothing is resumed — and on the right its context: Instructions, Memory (read-only), Context files and
  * Folders (`WorkspaceContext.tsx`, also folded at the bottom of the Changes panel).
  * @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
@@ -22,6 +22,7 @@
 
 import { isSubmitEnter } from "../../lib/keys";
 import { confirmDialog } from "../../lib/confirm";
+import { endRuns } from "../../lib/stopSession";
 import { useEffect, useRef, useState } from "react";
 import { useTranslation } from "react-i18next";
 import { useNavigate } from "react-router-dom";
@@ -307,30 +308,30 @@ function HomeBody({
     }
   };
   const archiveSession = async (s: Session) => {
-    const live = !!liveRunFor(lane, liveRuns, s.id);
+    const run = liveRunFor(lane, liveRuns, s.id);
+    // A live one is stopped first, as the tab's X does (its own confirm):
+    // archiving only its row left a pane running that no list showed.
+    if (run) {
+      if ((await endRuns([run], { name: s.name || t("tree.newSession"), t })).length)
+        await patchSession(s, { archived: true });
+      return;
+    }
     const wt = sessionWorktreeName(lane, s);
     const ok = await confirmDialog(
-      wt && !live
+      wt
         ? {
             title: t("tree.archiveWorktreeTitle"),
             message: t("tree.archiveWorktreeBody", { name: wt }),
             confirmLabel: t("tree.archiveWorktreeConfirm"),
           }
-        : live
-          ? {
-              title: t("tree.archiveLiveTitle"),
-              message: t("tree.archiveLiveBody"),
-              confirmLabel: t("sessionMenu.archive"),
-              destructive: false,
-            }
-          : {
-              title: t("tree.archiveSession"),
-              confirmLabel: t("sessionMenu.archive"),
-              destructive: false,
-            }
+        : {
+            title: t("tree.archiveSession"),
+            confirmLabel: t("sessionMenu.archive"),
+            destructive: false,
+          }
     );
     if (!ok) return;
-    if (wt && !live) {
+    if (wt) {
       try {
         await api.lanes.removeSessionWorktree(lane.id, s.id).catch((err: unknown) => {
           if ((err as { code?: string }).code !== "ENOWORKTREE") throw err;