fix(ui): remove vestigial ref, fix stale MeshMap test mock

Web5ConnectedNodes.vue declared nodesContainerRef but never consumed it
(the controller-nav system scans [data-controller-container] globally,
no other view uses a per-component ref for it) — broke the vue-tsc build.
MeshMap.test.ts's mocked mesh store predated federatedPositions (added
earlier this session for the Mesh Map federated-node feature) and crashed
on mount. Found live merging PR#67 (reticulum) + UI/UX work +
archy-openwrt into main for a combined fleet deploy.

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

neode-ui/src/components/__tests__/MeshMap.test.ts

@@ -4,6 +4,7 @@ import MeshMap from '../MeshMap.vue'
 
 const meshState = vi.hoisted(() => ({
   nodePositions: new Map(),
+  federatedPositions: new Map(),
   peers: [],
   status: null,
   deadmanStatus: null,
@@ -33,6 +34,7 @@ vi.mock('leaflet', () => ({
 describe('MeshMap', () => {
   beforeEach(() => {
     meshState.nodePositions.clear()
+    meshState.federatedPositions.clear()
     meshState.peers = []
     meshState.status = null
     meshState.deadmanStatus = null