Initial commit: mail-server with WebFlux backend and Angular v22 Synthwave frontend

Co-authored-by: Junie <junie@jetbrains.com>

frontend/src/app/interceptors/auth.interceptor.ts

@@ -0,0 +1,16 @@
+import { HttpInterceptorFn, HttpRequest, HttpHandlerFn } from '@angular/common/http';
+
+export const authInterceptor: HttpInterceptorFn = (req: HttpRequest<unknown>, next: HttpHandlerFn) => {
+  const token = localStorage.getItem('token');
+  
+  if (token) {
+    const cloned = req.clone({
+      setHeaders: {
+        Authorization: `Bearer ${token}`
+      }
+    });
+    return next(cloned);
+  }
+  
+  return next(req);
+};