Apollo Beach on its own: a standalone panel to send them

- tools/standalone.py builds dist/<Name> Status Panel.zip: program, install.command, READ ME FIRST.txt
- setup --standalone: campuses.json standalone, tells nobody, no hub, no NA key
- Standalone backs itself up nightly to ~/Documents/Status Panel Backups/<id>
- upgrade-companion --from <.dmg/.zip from bitfocus.io> (no NA needed)
- Only the hub lists campuses or shows other campuses' install lines

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

settings/ui/app.js

@@ -949,8 +949,8 @@
       <div class="card"><h3 style="margin-top:0">Computers${hint("Each computer runs the join line once: it lets this Mac log in with its key and says it is here. The next look gives its programs keys.")}</h3>
         <div class="tablewrap"><table>${comps}${joined}${comps || joined ? "" : "<tr><td class='muted'>none yet</td></tr>"}</table></div>
         ${line(d.join.mac, "Mac: Terminal, paste")}${line(d.join.pc, "PC: PowerShell as administrator, paste")}</div>
-      <div class="card"><h3 style="margin-top:0">Set up another campus${hint("On that campus's Mac that runs Companion: Terminal, paste. It installs the panel from here, finds the gear and makes the pages. Then each computer there runs that Mac's join line.")}</h3>
-        ${campuses.map(([k, n]) => line(`curl -fsSL "${d.base}/campus/install?id=${k}" | zsh`, n)).join("")}</div>`;
+      ${d.hub ? `<div class="card"><h3 style="margin-top:0">Set up another campus${hint("On that campus's Mac that runs Companion: Terminal, paste. It installs the panel from here, finds the gear and makes the pages. Then each computer there runs that Mac's join line.")}</h3>
+        ${campuses.map(([k, n]) => line(`curl -fsSL "${d.base}/campus/install?id=${k}" | zsh`, n)).join("")}</div>` : ""}`;
   }
   function siteHtml(c) {
     const f = F("site.editing_code");