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/run/PaneChat.tsx

@@ -65,6 +65,7 @@ import { addAttachments, dragAttachments } from "../../lib/promptAttach";
 import { readChatDraft, writeChatDraft } from "../../lib/chatDraft";
 import { ChatOutline, outlineAttachment, useSessionOutline, type OutlineList } from "./ChatOutline";
 import { FileListModal, FilePreview, SkillListModal, type PreviewScope } from "./ChatFilePreview";
+import { resolveIn } from "../../lib/resolvePath";
 import { Select } from "../Select";
 import { Divider, showTerminal } from "./PaneGrid";
 import {
@@ -471,7 +472,9 @@ export const PaneChat = memo(function PaneChat({
   // (ConversationView is memoized).
   const openTerminal = useCallback(() => showTerminal(runId, sessionId), [runId, sessionId]);
   const openFile = useCallback(
-    (path: string) => {
+    (named: string) => {
+      // A relative path in a reply (`server/lib/x.js`) is relative to this pane's folder.
+      const path = resolveIn(cwd, named);
       // The workspace's Changes panel when the file is in its folder;
       // else this view's own preview.
       if (laneId !== null && openInChanges(laneId, cwd, path)) return;