feat: v2.7.8 — Artifacts hub, clone related repos as extra folders, quieter resume prompt

- Artifacts (/artifacts): claude.ai pages sessions publish (captured from the
  Artifact tool's hook), pinned workspace files, skills and plugins, each
  kept as a snapshot; shared ones appear in a Hub and a skill or plugin
  installs into the viewer's own account (server/lib/artifacts.js,
  /api/artifacts, docs/plans/artifacts/).
- Workspace extra folders: clone one or more related repos beside the
  workspace and add them in one step (POST /api/lanes/:id/sources/clone).
- A pane that ended by itself while tmux kept running is no longer offered
  for resume (tmux.serverStartedAt in reconcileOrphans).
- Changes panel: a folder that is not a git repo opens on Files, and its
  files open from there.
- Plus the parallel sessions' work in this tree: File Explorer button in the
  panel header, user delete, RSA SSH keys, chat/terminal and pet fixes.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

client/src/components/users/UserEditDialog.tsx

@@ -14,6 +14,7 @@
 import { useEffect, useMemo, useRef, useState, type KeyboardEvent, type ReactNode } from "react";
 import { useTranslation } from "react-i18next";
 import { Copy, Eye, EyeOff, Plus, Sparkles, X } from "lucide-react";
+import { confirmDialog } from "../../lib/confirm";
 import { api, type AuthUser, type ServerUserUsage, type UserPatch } from "../../lib/api";
 import type { Lane } from "../../lib/types";
 import { fmtCost, formatDateTime } from "../../lib/format";
@@ -131,6 +132,38 @@ export function UserEditDialog({
     }
   };
 
+  /** Delete the user for good — asked first, with what goes, in red. */
+  const remove = async () => {
+    if (self || busy) return;
+    if (!current) {
+      setError(t("delete.needsPassword"));
+      return;
+    }
+    const name = user.displayName || user.username;
+    const ok = await confirmDialog({
+      title: t("delete.title", { name }),
+      message: t("delete.body", { name, count: owned?.length ?? 0, user: user.username }),
+      confirmLabel: t("delete.confirm"),
+      destructive: true,
+    });
+    if (!ok) return;
+    setBusy(true);
+    setError(null);
+    try {
+      await api.users.remove(user.id, current);
+      onDone(t("done.deleted", { name }));
+    } catch (e) {
+      const err = e as Error & { code?: string };
+      setError(
+        err.code && t(`errors.${err.code}`, { defaultValue: "" })
+          ? t(`errors.${err.code}`)
+          : err.message
+      );
+    } finally {
+      setBusy(false);
+    }
+  };
+
   const onKeyDown = (e: KeyboardEvent<HTMLInputElement>) => {
     if (isSubmitEnter(e)) {
       e.preventDefault();
@@ -459,8 +492,21 @@ export function UserEditDialog({
             </p>
           )}
           <div className="flex items-center justify-end gap-2">
+            {!self && (
+              <button
+                type="button"
+                onClick={() => void remove()}
+                disabled={busy}
+                data-testid="user-delete"
+                className="mr-auto rounded-md border border-status-danger/50 px-3 py-1.5 text-sm text-status-danger hover:bg-status-danger/10 disabled:opacity-50"
+              >
+                {t("delete.button")}
+              </button>
+            )}
             {!changed && (
-              <span className="mr-auto text-xs text-fg-muted">{t("edit.noChanges")}</span>
+              <span className={`text-xs text-fg-muted ${self ? "mr-auto" : ""}`}>
+                {t("edit.noChanges")}
+              </span>
             )}
             <button type="button" onClick={onClose} className="btn-ghost">
               {t("common:cancel")}