Add Swagger docs at /docs and /openapi.json; frontend and backend updates

Made-with: Cursor

frontend/src/App.tsx

@@ -49,6 +49,12 @@ export default function App() {
     setLoginMethod(pk ? (method ?? "nip98") : null);
   }, []);
 
+  const handleLogout = useCallback(() => {
+    clearToken();
+    setPubkey(null);
+    setLoginMethod(null);
+  }, []);
+
   const handleClaimSuccess = useCallback(() => {
     setStatsRefetchTrigger((t) => t + 1);
   }, []);
@@ -56,7 +62,7 @@ export default function App() {
   return (
     <BrowserRouter>
       <div className="app">
-        <Header />
+        <Header pubkey={pubkey} onLogout={handleLogout} />
         <div className="topbar" />
         <div className="app-body">
           <Routes>