refactor(repo): replace legacy openflare-server with Wavelet rename

Delete the old monolithic openflare-server implementation and rename
Wavelet/ to openflare-server/ to complete the migration consolidation.
Update CI workflows, agent Dockerfiles, and deployment docs for the new
layout (frontend/, docker/Dockerfile).

openflare-server/frontend/components/providers/auth-provider.tsx

@@ -0,0 +1,13 @@
+"use client"
+
+import {useUser} from "@/contexts/user-context"
+
+/**
+ * Auth provider bridge hook
+ *
+ * Provides a stable interface for components that use the useAuth() pattern.
+ * Delegates to the canonical UserContext under the hood.
+ */
+export function useAuth() {
+  return useUser()
+}