feat(frontend): global Cmd-K search across claims/remits/activity

src/components/Layout.tsx

@@ -2,6 +2,7 @@ import { Outlet } from "react-router-dom";
 import { useIsFetching } from "@tanstack/react-query";
 import { Sidebar } from "./Sidebar";
 import { SkipLink } from "@/components/ui/skip-link";
+import { SearchBar } from "./SearchBar";
 
 export function Layout() {
   // useIsFetching() returns the number of in-flight queries and is 0 on
@@ -37,6 +38,18 @@ export function Layout() {
         tabIndex={-1}
         className="md:pl-60 outline-none"
       >
+        {/*
+          Top bar — sits inside <main> so it shares the sidebar's right
+          column. Sticky to the viewport top so the search chip stays
+          reachable while the user scrolls long claim lists. The
+          hairline + horizontal padding mirrors the main content
+          container below it for visual continuity. The Sidebar's
+          own header is taller and brand-marked; this is the
+          lightweight "always-on utility" row.
+        */}
+        <div className="sticky top-0 z-20 mx-auto max-w-[1400px] px-8 h-12 flex items-center justify-end bg-background/70 backdrop-blur-md border-b border-border/40">
+          <SearchBar />
+        </div>
         <div className="mx-auto max-w-[1400px] px-8 py-10">
           <Outlet />
         </div>