feat(security): add CSRF protection for all state-changing API routes

- Synchronizer token stored in session; GET /auth/csrf to obtain it
- csrfProtection middleware requires X-CSRF-Token on non-safe methods
- customFetch injects the header via setCsrfTokenGetter
- toolrate boot loads token; reload after local login (session regenerate)
- OpenAPI GET /auth/csrf + CsrfToken schema, orval regenerated

artifacts/toolrate/src/App.tsx

@@ -1,7 +1,9 @@
 import { Switch, Route, Router as WouterRouter } from "wouter";
+import { useEffect } from "react";
 import { QueryClient, QueryClientProvider } from "@tanstack/react-query";
 import { I18nextProvider } from "react-i18next";
 import i18n from "@/i18n";
+import { loadCsrfToken } from "@/lib/csrf";
 import { Toaster } from "@/components/ui/toaster";
 import { TooltipProvider } from "@/components/ui/tooltip";
 
@@ -50,6 +52,9 @@ function Router() {
 }
 
 function App() {
+  useEffect(() => {
+    void loadCsrfToken();
+  }, []);
   return (
     <I18nextProvider i18n={i18n}>
       <QueryClientProvider client={queryClient}>