fix: update the quota tracker for user role

src/app/api/users/[userId]/token-usage/route.js

@@ -1,15 +1,9 @@
 import { NextResponse } from "next/server";
 import {
   getUserById,
-  getUserProviderTokenUsageSince,
-  getUserTokenLimits,
 } from "@/lib/db/index.js";
 import { requireAdminUser } from "@/lib/auth/currentUser.js";
-import { getUserTokenLimitWindowStart } from "@/lib/tokenLimitEnforcer.js";
-import {
-  USER_TOKEN_LIMIT_PROVIDER_IDS,
-  USER_TOKEN_LIMIT_WINDOW_IDS,
-} from "open-sse/config/userTokenLimits.js";
+import { getUserTokenQuota } from "@/lib/userTokenQuota.js";
 
 export const dynamic = "force-dynamic";
 
@@ -27,25 +21,6 @@ function errorResponse(error) {
   return NextResponse.json({ error: message }, { status, headers: NO_STORE_HEADERS });
 }
 
-function buildWindowUsage(limit, used, windowStart) {
-  const normalizedLimit = Math.max(0, Number(limit) || 0);
-  const normalizedUsed = Math.max(0, Number(used) || 0);
-  const remaining = normalizedLimit > 0
-    ? Math.max(0, normalizedLimit - normalizedUsed)
-    : null;
-  const remainingPercentage = normalizedLimit > 0
-    ? Math.round((remaining / normalizedLimit) * 100)
-    : null;
-
-  return {
-    limit: normalizedLimit,
-    used: normalizedUsed,
-    remaining,
-    remainingPercentage,
-    windowStart: windowStart.toISOString(),
-  };
-}
-
 export async function GET(_request, { params }) {
   try {
     await requireAdminUser();
@@ -56,39 +31,11 @@ export async function GET(_request, { params }) {
     if (user.role !== "user") throw new Error("Token usage only applies to user accounts");
 
     const now = new Date();
-    const limits = await getUserTokenLimits(user.id);
-    const windows = Object.fromEntries(USER_TOKEN_LIMIT_WINDOW_IDS.map((windowType) => [
-      windowType,
-      getUserTokenLimitWindowStart(windowType, now),
-    ]));
-
-    const usageEntries = await Promise.all(
-      USER_TOKEN_LIMIT_PROVIDER_IDS.flatMap((provider) => (
-        USER_TOKEN_LIMIT_WINDOW_IDS.map(async (windowType) => {
-          const used = await getUserProviderTokenUsageSince(
-            user.id,
-            provider,
-            windows[windowType],
-          );
-          return [provider, windowType, used];
-        })
-      )),
-    );
-
-    const usageByProvider = Object.fromEntries(
-      USER_TOKEN_LIMIT_PROVIDER_IDS.map((provider) => [provider, {}]),
-    );
-    for (const [provider, windowType, used] of usageEntries) {
-      usageByProvider[provider][windowType] = buildWindowUsage(
-        limits[provider]?.[windowType],
-        used,
-        windows[windowType],
-      );
-    }
+    const providers = await getUserTokenQuota(user.id, now);
 
     return NextResponse.json({
       userId: user.id,
-      providers: usageByProvider,
+      providers,
       updatedAt: now.toISOString(),
     }, { headers: NO_STORE_HEADERS });
   } catch (error) {