feat(ui): render the location tray's pills, mini status and search error from a store

LocationControls (./ui/location) no longer builds the city and landmark
pills or writes the mini status and the search error: it presents the tray
and hands it to its publish option, so the entry stays Vue-free. The shell
publishes it to a new gev-location store and connects the controls, and
the dock renders it and calls chooseCity() and choosePoi(). The landmark
row still expands a frame after its pills render. The search field, its
toggle and the reset buttons keep their listeners. The location QA harness
reads the rendered elements.

src/ui/shellElements.js

@@ -124,13 +124,7 @@ export function readShellElements(document = globalThis.document) {
     _cctvSyncProgress: document.getElementById('cctv-sync-progress'),
     _toast: document.getElementById('toast'),
     _locationSearch: document.getElementById('location-search'),
-    _locationSearchError: document.getElementById('location-search-error'),
     _searchToggle: document.getElementById('search-toggle'),
-    _locationPills: document.getElementById('location-pills'),
-    _poiRow: document.getElementById('poi-row'),
-    _locationBarDivider: document.getElementById('location-bar-divider'),
-    _locationMiniCity: document.getElementById('location-mini-city'),
-    _locationMiniPoi: document.getElementById('location-mini-poi'),
     _safeFrameOverlay: document.getElementById('safe-frame-overlay'),
     _safeFrameBox: document.getElementById('safe-frame-box'),
     _detectionBtn: document.getElementById('detection-toggle'),