Add proxy auth ui

proxy/web/src/data.ts

@@ -0,0 +1,17 @@
+// Auth method types matching Go
+export type AuthMethod = 'pin' | 'password' | 'oidc' | "link"
+
+// Data injected by Go templates
+export interface Data {
+  methods?: Partial<Record<AuthMethod, string>>
+}
+
+declare global {
+  interface Window {
+    __DATA__?: Data
+  }
+}
+
+export function getData(): Data {
+  return window.__DATA__ ?? {}
+}