ui

# What does this PR do?


## Test Plan
# What does this PR do?


## Test Plan
# What does this PR do?


## Test Plan

llama_stack/ui/app/api/auth/[...path]/route.ts

@@ -0,0 +1,88 @@
+import { NextRequest, NextResponse } from "next/server";
+import { BACKEND_URL } from "@/lib/server-config";
+
+async function proxyAuthRequest(request: NextRequest, method: string) {
+  try {
+    const url = new URL(request.url);
+    const pathSegments = url.pathname.split("/");
+
+    // Remove /api/auth from the path to get the actual auth path
+    // /api/auth/github/login -> /auth/github/login
+    const authPath = pathSegments.slice(3).join("/"); // Remove 'api' and 'auth' segments
+    const targetUrl = `${BACKEND_URL}/auth/${authPath}${url.search}`;
+
+    // Prepare headers (exclude host and other problematic headers)
+    const headers = new Headers();
+    request.headers.forEach((value, key) => {
+      // Skip headers that might cause issues in proxy
+      if (
+        !["host", "connection", "content-length"].includes(key.toLowerCase())
+      ) {
+        headers.set(key, value);
+      }
+    });
+
+    const requestOptions: RequestInit = {
+      method,
+      headers,
+      // Don't follow redirects automatically - we need to handle them
+      redirect: "manual",
+    };
+
+    if (["POST", "PUT", "PATCH"].includes(method) && request.body) {
+      requestOptions.body = await request.text();
+    }
+
+    const response = await fetch(targetUrl, requestOptions);
+
+    // Handle redirects
+    if (response.status === 302 || response.status === 307) {
+      const location = response.headers.get("location");
+      if (location) {
+        // For external redirects (like GitHub OAuth), return the redirect
+        return NextResponse.redirect(location);
+      }
+    }
+
+    if (response.ok) {
+      const responseText = await response.text();
+
+      const proxyResponse = new NextResponse(responseText, {
+        status: response.status,
+        statusText: response.statusText,
+      });
+
+      response.headers.forEach((value, key) => {
+        if (!["connection", "transfer-encoding"].includes(key.toLowerCase())) {
+          proxyResponse.headers.set(key, value);
+        }
+      });
+
+      return proxyResponse;
+    }
+
+    const errorText = await response.text();
+    return new NextResponse(errorText, {
+      status: response.status,
+      statusText: response.statusText,
+    });
+  } catch (error) {
+    return NextResponse.json(
+      {
+        error: "Auth proxy request failed",
+        message: error instanceof Error ? error.message : "Unknown error",
+        backend_url: BACKEND_URL,
+        timestamp: new Date().toISOString(),
+      },
+      { status: 500 },
+    );
+  }
+}
+
+export async function GET(request: NextRequest) {
+  return proxyAuthRequest(request, "GET");
+}
+
+export async function POST(request: NextRequest) {
+  return proxyAuthRequest(request, "POST");
+}