feat(ui): render the Cockpit briefing card from a store

The Cockpit controller no longer writes the briefing card's pages, cycle
toggle, regional news and local conditions: it keeps them as plain state,
starting from cockpitBriefPages.js, and publishes a copy to a new
gev-cockpit store. A new CockpitBriefing component, lifted verbatim from
the Cockpit view, renders it. News rows are keyed by story, so a focused
link never turns into another story on refresh. The controls keep the
controller's listeners; the route card and the signal list keep their
owners' bindings for now. The boot-time kicker translation is gone, as
the card translates its own text.

src/ui/applicationShell.js

@@ -57,6 +57,7 @@ import { applicationPinia, createUiRuntime } from './vueRuntime.js';
 import { useContextStore } from './stores/context.js';
 import { useDisplayStore } from './stores/display.js';
 import { useLocationStore } from './stores/location.js';
+import { useCockpitStore } from './stores/cockpit.js';
 
 /**
  * Central UI orchestrator for the God's Eye View application.
@@ -374,6 +375,8 @@ export class StyleManager extends ShellFacade {
         _models3dBtn: this._models3dBtn,
       },
       operations: {
+        publishCockpitBrief: (view) =>
+          useCockpitStore(applicationPinia()).publishBrief(view),
         _layoutRightPanels: (...args) => this._layoutRightPanels(...args),
         _setCockpitVision: (...args) => this._setCockpitVision(...args),
         _stampNavigation: (...args) => this._stampNavigation(...args),
@@ -833,11 +836,6 @@ export class StyleManager extends ShellFacade {
         ),
       );
     }
-    // Leading space after the live dot, as showBriefPage writes it.
-    const briefKicker = document.querySelector('#cockpit-brief-kicker');
-    if (briefKicker) {
-      this._setHeaderText(briefKicker, ` ${t('LIVE SIGNALS')}`);
-    }
   }
 
   /**