fix: v2.6.1 — panes start in their folder again after an update (#69), Changes panel stacks every repo, clickable paths in chat

- #69: tmux applies a pane's `-c` only while its server's own cwd exists.
  The server was forked from the dashboard's cwd (the plugin cache dir),
  outlives updates, and the old cache dir is pruned — after that every new
  pane started in a deleted directory, where `claude` died at once ("run not
  found") and a shell printed getcwd errors. tmux calls now run from `/`,
  and the pane's sh wrapper cds into its folder itself, which also heals a
  tmux server that is already stuck.
- Changes panel: a workspace's extra folders are sections stacked under the
  workspace folder (VS Code Source Control style), with Close repository /
  Close other repositories on a header's right-click.
- Chat: URLs and absolute paths are links; Claude Code's `[Image: source:]`
  line folds into its turn; uploads under `<data dir>/drops/` are listed.
- Update check: a checkout holding commits a newer release lacks reports
  `diverged_from_release` instead of offering a fast-forward that can only fail.

client/src/components/lanes/WorkspaceHome.tsx

@@ -119,6 +119,7 @@ function HomeBody({
   onMenuAction,
   onRenamed,
   onSourcesChange,
+  sourcesVersion = 0,
 }: {
   lane: Lane;
   /** Row-menu items the page carries out (its modals); rename is done here. */
@@ -127,6 +128,9 @@ function HomeBody({
   onRenamed?: () => void;
   /** Called with the sources after a folder or file is added or removed. */
   onSourcesChange?: (view: LaneSourcesView) => void;
+  /** Bumped when the folder list changed elsewhere (the Changes panel's
+   *  Close repository): the Folder list re-reads. */
+  sourcesVersion?: number;
 }) {
   const { t } = useTranslation("lanes");
   const navigate = useNavigate();
@@ -314,6 +318,19 @@ function HomeBody({
     };
   }, [folderOpen, lane.id, prefs.showUntracked, prefs.hideSources, view?.sources]);
 
+  useEffect(() => {
+    if (!sourcesVersion) return;
+    let live = true;
+    api.lanes
+      .sources(lane.id)
+      .then((v) => live && setView(v))
+      .catch(() => undefined);
+    return () => {
+      live = false;
+    };
+    // eslint-disable-next-line react-hooks/exhaustive-deps -- on a bump only
+  }, [sourcesVersion]);
+
   const run = async (fn: () => Promise<LaneSourcesView>) => {
     setError(null);
     try {