Move peer list into dedicated Peers sidebar tab

Keep quick Add peer (and Peers shortcut) in the sidebar footer; full
saved-peer list, counts, and actions live on a new Peers view that is
reachable offline for managing keys.

test/visual-structure.test.js

@@ -21,6 +21,8 @@ const REQUIRED_IDS = [
   'swarm-view',
   'host-view',
   'settings-view',
+  'peers-view',
+  'connection-list',
   'deploy-wizard-steps',
   'stack-git-url',
   'tunnel-create-btn',
@@ -30,9 +32,11 @@ const REQUIRED_IDS = [
 const REQUIRED_SNIPPETS = [
   'data-view="tunnels"',
   'data-view="swarm"',
+  'data-view="peers"',
   'ENABLE_HOLESAIL',
   'GitOps',
   'collapse-sidebar-btn',
+  'open-add-connection-btn',
 ]
 
 test('index.html retains critical view landmarks', (t) => {