offscale, extracted from the platform into its own repository

The tailnet plugin — machines, users, pre-auth keys, access policy and device
invites. Moved out of officerdev/platform, where it had lived in plugins/ since
the plugin system was built.

Until now this code existed in exactly one place: the platform repository. That
made "gitignore the plugins directory" impossible to do safely, because
untracking it would have left 49 files on a single disk with no remote. This
repository is what makes that move safe.

Same extraction as plugins/music before it: source only, no history. The
platform's history still holds every commit that shaped this, and the SHAs cited
across the codebase keep resolving — replaying it here would have created a
second, divergent account of the same work.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

web/panels.ts

@@ -0,0 +1,27 @@
+import type { AppRegistryMeta } from 'officerdev';
+import { PanelLeft, LayoutGrid, Network } from 'lucide-react';
+import { HeadscaleNav } from './HeadscaleNav';
+import { HeadscaleServerPicker } from './HeadscaleServerPicker';
+import { HeadscaleView } from './HeadscaleView';
+import { HeadscaleViewHeader } from './HeadscaleViewHeader';
+
+export { HeadscaleNav, HeadscaleServerPicker, HeadscaleView };
+
+export const appRegistryMetas: AppRegistryMeta[] = [
+  {
+    key: 'headscale-servers',
+    name: 'Headscale servers',
+    icon: Network,
+    component: HeadscaleServerPicker,
+    availableOnPanel: false,
+  },
+  { key: 'headscale-nav', name: 'Headscale', icon: PanelLeft, component: HeadscaleNav, availableOnPanel: false },
+  {
+    key: 'headscale-view',
+    name: 'Headscale',
+    icon: LayoutGrid,
+    component: HeadscaleView,
+    header: HeadscaleViewHeader,
+    availableOnPanel: false,
+  },
+];