v0.320.0: the FileBrowser login line under the folder list — readable link, spaced from the list

Seen in the headless-browser check on demo-hp (rc.1): the link kept the browser's default dark blue on
the navy panel. It takes app-info-link (--blue-bright) and sits .75rem under the list.

Claude-Session: https://claude.ai/code/session_0159rPz1ZhFKsS53msqPYxtS

controller/internal/web/templates/style.css

@@ -1581,6 +1581,8 @@ a.stat-card:hover {
     font-size: .85rem;
     line-height: 1.45;
 }
+/* v0.320.0: the file manager's own login, said under the folder list. */
+.datapath-fb-note { margin-top: .75rem; }
 .app-info-list {
     margin: 0;
     padding-left: 1.25rem;