feat(web): add global app status surface (#1869)

* feat(web): add app status bar

* feat(web): add app status bar visibility toggle

* feat(web): persist status bar item order

* fix(web): refine app status bar behavior

* fix(web): polish app status bar presentation

* test(web): split plugin slot coverage groups

* fix(web): address status surface review feedback

* fix(web): stabilize status bar overlay tests

apps/web/app/github/github-page-client.tsx

@@ -503,7 +503,7 @@ export function GitHubPageClient({
   };
 
   return (
-    <div className="h-screen w-full flex flex-col bg-background">
+    <div className="flex h-full min-h-0 w-full flex-col bg-background">
       <PageHeader onOpenMobileSidebar={loaded && authed ? onOpenMobileSidebar : undefined} />
       {!loaded && <div className="p-6 text-sm text-muted-foreground">Checking GitHub status…</div>}
       {loaded && !authed && (