add: last_online and online indicators

crates/app/src/public/html/profile/settings.html

@@ -493,6 +493,11 @@
                         "{{ profile.settings.private_communities }}",
                         "checkbox",
                     ],
+                    [
+                        ["private_last_seen", "Keep my last seen time private"],
+                        "{{ profile.settings.private_last_seen }}",
+                        "checkbox",
+                    ],
                 ],
                 settings,
             );