fix: agent update runs as root when it can (sudo without a password otherwise), checks the download, restarts reliably and reports its result; one-colour file icons; zip and delete on one line on phones; PIN buttons alike; no key fingerprint in the SSH status; corner plus clears split panes

internal/server/web/static/terminal.js

@@ -287,6 +287,7 @@
     t.el.querySelector('.dot').className = 'dot ' + (st.includes('err') ? 'err' : st.includes('wait') ? 'wait' : st.includes('ok') ? 'ok' : 'off');
     t.el.classList.toggle('on', t === active);
     t.view.classList.toggle('split', t.panes.length > 1);
+    syncFloat();
   }
   function activate(t) {
     if (!t) return;
@@ -310,8 +311,13 @@
     statusEl.title = activePane.text;
     statusEl.className = activePane.state === 'ok' ? 'st-ok' : activePane.state === 'err' ? 'st-err' : 'muted';
   }
+  // The corner "+" moves down out of the way of a split tab's title bars.
+  function syncFloat() {
+    document.body.classList.toggle('split1', tabs.length === 1 && tabs[0].panes.length > 1);
+  }
   // One tab: a plain terminal, the strip folded into the corner "+".
   function updateMode() {
+    syncFloat();
     const multi = tabs.length > 1;
     if (document.body.classList.contains('multi') === multi) return;
     document.body.classList.toggle('multi', multi);