feat: implement dashboard state management, API proxy layer, and modular UI components for weather monitoring and payments

frontend/app/api/payments/intents/[intentId]/route.ts

@@ -1,12 +1,5 @@
 import { NextRequest, NextResponse } from "next/server";
-import {
-  applyAuthResponseCookies,
-  buildBackendRequestHeaders,
-} from "@/lib/backend-auth";
-import {
-  buildProxyExceptionResponse,
-  buildUpstreamErrorResponse,
-} from "@/lib/api-proxy";
+import { proxyBackendJsonGet } from "@/lib/api-proxy";
 
 const API_BASE = process.env.POLYWEATHER_API_BASE_URL;
 
@@ -21,29 +14,11 @@ export async function GET(
     );
   }
   const { intentId } = await context.params;
-  try {
-    const auth = await buildBackendRequestHeaders(req);
-    const res = await fetch(
-      `${API_BASE}/api/payments/intents/${encodeURIComponent(intentId)}`,
-      {
-        method: "GET",
-        headers: auth.headers,
-        cache: "no-store",
-      },
-    );
-    if (!res.ok) {
-      const raw = await res.text();
-      const response = buildUpstreamErrorResponse(res.status, raw, {
-        detailLimit: 350,
-      });
-      return applyAuthResponseCookies(response, auth.response);
-    }
-    const data = await res.json();
-    const response = NextResponse.json(data);
-    return applyAuthResponseCookies(response, auth.response);
-  } catch (error) {
-    return buildProxyExceptionResponse(error, {
-      publicMessage: "Failed to fetch payment intent",
-    });
-  }
+  return proxyBackendJsonGet(req, {
+    detailLimit: 350,
+    fetchCache: "no-store",
+    includeSupabaseIdentity: true,
+    publicMessage: "Failed to fetch payment intent",
+    url: `${API_BASE}/api/payments/intents/${encodeURIComponent(intentId)}`,
+  });
 }