feat: add local auth billing and usage management

app/api/generations/video/route.ts

@@ -1,8 +1,9 @@
 import { listGenerationJobs } from "@/lib/server/data-store";
 import { jsonError, jsonOk, readJsonBody } from "@/lib/server/api";
-import { requireAppUser } from "@/lib/server/auth/current-user";
+import { requireAppSession, requireAppUser } from "@/lib/server/auth/current-user";
 import { requestOrigin } from "@/lib/server/runtime";
 import { submitVideoJob, type SubmitVideoJobInput } from "@/lib/server/video-generation-service";
+import { resolvePlatformUsageContext } from "@/lib/server/usage-context";
 
 export const runtime = "nodejs";
 
@@ -18,9 +19,11 @@ export async function GET() {
 
 export async function POST(request: Request) {
   try {
-    const user = await requireAppUser();
+    const session = await requireAppSession();
+    const user = session.user;
     const body = await readJsonBody<SubmitVideoJobInput & Record<string, unknown>>(request);
-    const job = await submitVideoJob({ ...body, ownerId: user.id }, requestOrigin(request));
+    const usageContext = await resolvePlatformUsageContext(session);
+    const job = await submitVideoJob({ ...body, ownerId: user.id, usageContext }, requestOrigin(request));
     return jsonOk({ job }, { status: 202 });
   } catch (error) {
     return jsonError(error);